WO2019218295A1 - Efficient purification method for high-silicon, high-calcium, high-iron and low-grade brucite - Google Patents

Efficient purification method for high-silicon, high-calcium, high-iron and low-grade brucite Download PDF

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WO2019218295A1
WO2019218295A1 PCT/CN2018/087266 CN2018087266W WO2019218295A1 WO 2019218295 A1 WO2019218295 A1 WO 2019218295A1 CN 2018087266 W CN2018087266 W CN 2018087266W WO 2019218295 A1 WO2019218295 A1 WO 2019218295A1
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flotation
calcium
concentrate
brucite
silicon
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PCT/CN2018/087266
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French (fr)
Chinese (zh)
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付亚峰
印万忠
孙浩然
姚金
杨斌
李闯
孙乾予
赵晨
周游
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东北大学
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00—Specified materials treated by the flotation agents; specified applications
    • B03D2203/02—Ores
    • B03D2203/04—Non-sulfide ores

Definitions

  • the invention belongs to the technical field of mineral processing, and particularly relates to an efficient purification method of high silicon high calcium high iron low grade brucite.
  • Brucite also known as hydrated magnesia
  • magnesia refractories such as magnesia carbon bricks and magnesia chrome bricks required by the steel industry.
  • Propylene is used as a matrix to produce high-grade inorganic flame retardants, magnesium binders, ceramics, and the like.
  • China is a country with rich reserves of brucite resources.
  • the proven reserves of brucite resources have exceeded 30 million tons, and the reserves rank first in the world, mainly distributed in Ningqiang, Liaoning, Fengcheng, Liaoning, and Ji'an, Jilin.
  • Most of the brucite resources in China have high natural grades, which causes many brucite mines to mine only high-quality brucite ore. A large number of low-grade brucites have not been effectively utilized, resulting in the great non-renewable resources of brucite. waste.
  • Patent CN201210003429.7 discloses a step-by-step flotation method for high-silicon high-calcium low-grade brucite.
  • the main point is to use fractional flotation method, the first step of reverse flotation to sort out most of the calcium-containing gangue minerals.
  • flotation is selected by flotation, but the patent does not propose a method for purifying high-silica, high-calcium, high-iron brucite ore.
  • the presence of iron-bearing minerals in brucite deteriorates flotation.
  • the environment reduces the ability of collectors to capture minerals during reverse flotation and positive flotation, resulting in a decrease in the index of flotation concentrates.
  • the research on the purification method of high-silica, high-calcium and high-iron low-grade brucite is not yet visible, and its ore dressing purification method needs further research.
  • the present invention provides a high-purity high-calcium high-calcium high-grade low-grade brucite high-efficiency purification method, aiming at high silicon and high calcium.
  • the high-speed low-grade brucite is ground to a single dissociation by a ball mill, and then selected by a strong magnetic separation process to remove the iron mineral contained in the ore, and then treated by a flotation process to obtain a high-grade fire-resistant material.
  • High grade brucite of material is ground to a single dissociation by a ball mill, and then selected by a strong magnetic separation process to remove the iron mineral contained in the ore, and then treated by a flotation process to obtain a high-grade fire-resistant material.
  • the method for efficiently purifying high silicon high calcium high iron low grade brucite of the invention comprises the following steps:
  • High silicon high calcium high iron low grade brucite is ground to monomer dissociation to obtain high silicon high calcium high iron low grade brucite powder, among which high silicon high calcium high iron low grade magnesium water with fineness ⁇ 0.074mm
  • the weight of stone powder accounts for 70-85% of the weight of total high silicon high calcium high iron low grade brucite powder;
  • the high silicon high calcium high iron low grade brucite contains the components and the mass percentage of each component: MgO 50-60%, SiO 2 1-10%, CaO 1-10%, TFe 1-10%, LOI 20 ⁇ 30%, the balance is impurity;
  • High-silica, high-calcium, high-iron, low-grade brucite powder is magnetically selected by a strong magnetic separator.
  • the magnetic field strength is 0.8-1.0T, and the iron-bearing minerals in the high-silica-high-calcium-high-iron low-grade brucite powder are removed.
  • Magnetic separation concentrate containing iron grade ⁇ 0.5%;
  • Step 3 Reverse flotation to remove silicon-containing minerals
  • flotation reagents such as inhibitor water glass, amine collector and foaming agent
  • each flotation agent is added in an amount: per ton of magnetic separation concentrate, inhibitor water glass
  • the dosage is 500-1000g
  • the amount of the amine collector is 100-300g
  • the foaming agent pine oil is added in an amount of 5-15g;
  • Step 4 Positive flotation to remove calcium-containing minerals
  • the inhibitor sodium hexametaphosphate and the collector sodium oleate are sequentially added at a stirring speed of 1800 to 2000 rpm, and the mixture is stirred after each dosing 2 ⁇ 4min, and then carry out rough flotation, sorting out the tailings containing calcium, and obtaining the flotation coarse concentrate; among them, the inhibitor of sodium hexametaphosphate is 50-200g per ton of desiliconized concentrate. , the amount of sodium oleate added is 800-2000g;
  • each ton of positive flotation coarse concentrate The quality of the sodium oleate added to the collector is 300 to 500 g.
  • the raw slurry is added to the flotation equipment, and the uniform stirring process is: the stirring speed is 1500-2000 rpm, and the stirring time is 2-4 min.
  • the amine collector is preferably dodecylamine.
  • the time for the reverse flotation rough selection is preferably 3 to 5 minutes.
  • the mixing conditions are as follows: the stirring speed is 1500-2000 rpm, and the stirring time is 2-4 min.
  • the amine collector is preferably dodecylamine.
  • the time for the reverse flotation selection is preferably 2 to 3 minutes.
  • the high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite in the step 3 (3), when one reverse flotation is selected, the first reverse flotation is selected.
  • the flotation tailings are returned to the raw ore slurry in which three kinds of flotation reagents including inhibitor water glass, amine collector and foaming agent pine alcohol oil are added in step 3 (2), and the reverse flotation is selected together.
  • the high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite in the step 3 (3), when the reverse flotation is selected twice, the first reverse flotation is selected once.
  • the reverse flotation tailings is returned to the raw ore slurry in which three kinds of flotation reagents including inhibitor water glass, amine collector, and foaming agent pine alcohol oil are added in step 3 (2), and the reverse flotation is selected together;
  • the second reverse flotation tailings selected in the second reverse flotation are returned to the reverse flotation coarse concentrate with the amine collector added in step 3 (3), and the first reverse flotation is performed together. selected.
  • the time for the preliminary flotation rough selection is preferably 2 to 3 minutes.
  • the process parameters of stirring uniformly are: stirring speed is 1500-2000 rpm, stirring time is 2 ⁇ 4min.
  • the time for positive flotation selection is preferably 2 to 3 minutes.
  • the high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite in the step 4 (3), when the first positive flotation is selected, the first positive flotation is selected once.
  • the positive flotation tailings are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in the step 4 (2), and the rough flotation is performed together.
  • the high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite in the step 4 (3), when the positive flotation is selected twice, the first positive flotation is selected once.
  • the positive flotation tailings are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is selected together; the second positive flotation is selected.
  • the obtained secondary positive flotation tailings are returned to the positive flotation coarse ore slurry in which the collector sodium silicate is added in the step 4 (3), and the first positive flotation is selected together.
  • the specific number of reverse flotation selection and positive flotation selection for the reverse flotation coarse concentrate and the positive flotation coarse concentrate respectively depends on the raw materials. Nature and requirements of the final product.
  • the obtained brucite concentrate contains the components and the weight percentage of each component: MgO: 65 to 68%, SiO 2 ⁇ 0.6%, CaO ⁇ 0.6%, TFe ⁇ 0.5%, LOI 29 ⁇ 31%, the balance is impurities.
  • the MgO recovery rate in the obtained brucite concentrate is 65-85% by weight.
  • the iron-containing gangue in the brucite powder is removed by a magnetic field force at a magnetic field strength of 0.8 to 1.0 T by a strong magnetic separator.
  • the minerals make the iron-containing grade in the magnetic separation concentrate ⁇ 0.5%, thereby reducing the influence of iron-containing minerals on subsequent flotation operations.
  • the high-purity and high-purity high-iron low-grade brucite of the present invention has the characteristics and beneficial effects of:
  • the method of the invention has many types of gangue minerals, low ore grade, and high content of SiO 2 , CaO and TFe in the ore.
  • the first step is to remove most of the iron-containing gangue minerals and improve the subsequent flotation environment; the second step is reverse flotation Except for most of the silicon-containing gangue minerals; the third step is to flocculate the brucite to remove the calcium-containing gangue minerals.
  • the method for purifying high-silica, high-calcium, high-iron and low-grade brucite of the invention provides a method for the development and utilization of the same type of low-grade brucite in China, and the purification process runs smoothly and the quality of the concentrate product is high. Finally, a brucite concentrate with a minimum MgO grade of 65% and a recovery of 70-85% can be obtained.
  • the high-silicon high-calcium high-iron low-grade brucite purification method of the invention has high content of calcium, silicon, iron and other gangue minerals, and the purified brucite concentrate has high purity and good sorting effect. It provides a purification method for the development and utilization of high-silica, high-calcium and high-iron low-grade brucite resources in China, and the efficient use of such brucites is of great significance.
  • FIG. 1 is a process flow diagram of a method for purifying high silicon, high calcium, high iron and low grade brucite according to an embodiment of the present invention.
  • the dodecylamine, sodium oleate, sodium hexametaphosphate and NaOH used in the examples of the present invention are all chemically pure, and the water glass and the pine oil are industrial grade products.
  • High intensity magnetic separation device employed in the embodiment of the present invention is a XCQS type strong magnetic separator, reverse flotation device is a single slot XFD IV flotation machine, flotation equipment used for continuous XFLB closed type micro flotation machine.
  • the high-silicon high-calcium high-iron low-grade brucite used in the embodiment of the present invention is a mineral of Fengcheng District, Liaoning province, and the main gangue minerals in the ore are serpentine, dolomite, magnetite, hematite, etc., and gangue Mineral inlays are finer in size, and useful minerals and gangue minerals are more difficult to dissociate.
  • FIG. 1 The process flow of the method for purifying high silicon high calcium high iron low grade brucite according to the embodiment of the present invention is shown in FIG. 1 .
  • the high-silicon high-calcium high-iron low-grade brucite used in this embodiment has a main component of MgO of 51.28%, SiO 2 of 7.35%, CaO of 3.59%, TFe of 2.07% and LOI of 22.12%.
  • the balance is impurities;
  • An efficient purification method for high silicon high calcium high iron low grade brucite specifically comprising the following steps:
  • the high silicon high calcium high iron low grade brucite is ground to a single dissociation by a ball mill to obtain high silicon high calcium high iron low grade brucite powder, wherein the high silicon high calcium high iron low grade water with fineness ⁇ 0.074 mm Magnesia powder weight accounts for 70% of the total high silicon high calcium high iron low grade brucite powder;
  • the high silicon high calcium high iron low grade brucite powder is magnetically selected by a strong magnetic separator, the magnetic field strength is 0.8T, and the iron gangue mineral in the high silicon high calcium high iron low grade brucite powder is removed, that is, sorting Producing iron tailings to obtain a magnetic separation concentrate containing iron grade ⁇ 0.5%;
  • Step 3 Reverse flotation to remove silicon-containing minerals
  • the inhibitor water glass is first added and stirred for 3 minutes at a stirring speed of 1600 rpm, and the water glass is added in a 500 g/t magnetic separation concentrate, and then added to the harvest.
  • the dodecylamine was stirred for 3 min, the dodecylamine was added in an amount of 100 g/t magnetic separation concentrate, and the foaming agent pine oil was added and stirred for 3 min.
  • the amount of pine oil was 15 g/t magnetic separation concentrate.
  • 3 minutes of reverse flotation is selected, and the silicon tailings are sorted to obtain a reverse flotation coarse concentrate;
  • the first reverse flotation selection of a reverse flotation tailings is returned to the third flotation agent in step 3 (2) with inhibitor water glass, collector dodecylamine and foaming agent pine oil.
  • the reverse flotation is selected together;
  • the second reverse flotation is selected in a reverse flotation tailings return step 3 (3) with the addition of the dodecylamine antiflotation coarse
  • the first reverse flotation selection was carried out together.
  • Step 4 Positive flotation to remove calcium-containing minerals
  • the obtained brucite concentrate contains the components and the weight percentages of the respective components: MgO is 67.71%, and SiO 2 is 0.46. %, CaO is 0.52%, TFe is 0.23%, LOI is 31%, and the balance is impurities;
  • the first positive flotation tailings selected in the first positive flotation are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is performed together. Rough selection.
  • the weight of MgO in the brucite concentrate obtained in this example accounts for 73.38% of the total weight of MgO in the raw material.
  • the high-silicon high-calcium-high-iron type low-grade bauxite raw material used in the present embodiment contains Mg8.2 as a weight percentage of 58.28%, SiO 2 as 2.13%, CaO of 1.36%, TFe of 7.52%, and LOI of 27.63%.
  • the balance is impurities;
  • An efficient purification method for high silicon high calcium high iron low grade brucite comprising the following steps:
  • High silicon high calcium high iron low grade brucite is ground to monomer dissociation to obtain high silicon high calcium high iron low grade brucite powder, among which high silicon high calcium high iron low grade brucite powder with fineness ⁇ 0.074mm The weight accounts for 85% of the total high silicon high calcium high iron low grade brucite powder;
  • the high-silicon high-calcium high-iron low-grade brucite powder is magnetically selected by a strong magnetic separator, and the magnetic field strength is 1.0T.
  • the iron-bearing gangue mineral in the high-silica high-calcium high-iron low-grade brucite powder is removed, that is, sorting Producing iron tailings to obtain a magnetic separation concentrate containing iron grade ⁇ 0.5%;
  • Step 3 Reverse flotation to remove silicon-containing minerals
  • the inhibitor water glass is first added and stirred for 2 min at a stirring speed of 2000 rpm, and the water glass is added in an amount of 1000 g/t magnetic separation concentrate, and then added to the harvest.
  • the dodecylamine was stirred for 2 min, the dodecylamine was added in an amount of 300 g/t magnetic separation concentrate, and the foaming agent pine oil was added and stirred for 2 min.
  • the amount of pine oil was 5 g/t magnetic separation concentrate.
  • 3 minutes of reverse flotation is selected, and the silicon tailings are sorted to obtain a reverse flotation coarse concentrate;
  • the first reverse flotation selection of a reverse flotation tailings is returned to the third flotation agent in step 3 (2) with inhibitor water glass, collector dodecylamine and foaming agent pine oil. In the original slurry, the reverse flotation is selected together;
  • Step 4 Positive flotation to remove calcium-containing minerals
  • the obtained brucite concentrate contains the components and the weight percentages of the respective components: MgO is 67.23%, and SiO 2 is 0.23. %, CaO is 0.31%, TFe is 0.36%, LOI is 29%, and the balance is impurities;
  • the first positive flotation tailings obtained from the first positive flotation are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is performed together.
  • the second positive flotation tailings obtained by the second positive flotation selection are returned to the positive flotation coarse-concentrated concentrate slurry with the sodium oleate of the collector, and the first positive flotation is performed together. selected;
  • the weight of MgO in the brucite concentrate obtained in this example accounts for 83.51% of the total weight of MgO in the raw material.
  • the high-silicon high-calcium-high-iron type low-grade bauxite raw material used in the present embodiment contains MgO of 54.57%, SiO 2 of 5.14%, CaO of 6.78%, TFe of 4.81% and LOI of 25.53% by weight. The balance is impurities;
  • An efficient purification method for high silicon high calcium high iron low grade brucite comprising the following steps:
  • High silicon high calcium high iron low grade brucite is dissociated from the ball mill to the monomer to obtain high silicon high calcium high iron low grade brucite powder, wherein the fine silicon high calcium high iron low grade brucite powder weight less than 0.074mm 80% of the total high silicon high calcium high iron low grade brucite powder;
  • the high silicon high calcium high iron low grade brucite powder is magnetically selected by a strong magnetic separator, the magnetic field strength is 0.8T, and the iron gangue mineral in the high silicon high calcium high iron low grade brucite powder is removed, that is, sorting Producing iron tailings to obtain a magnetic separation concentrate containing iron grade ⁇ 0.5%;
  • Step 3 Reverse flotation to remove silicon-containing minerals
  • the inhibitor water glass is first added and stirred for 4 minutes under the stirring speed of 1800 rpm, and the water glass is added in an amount of 800 g/t magnetic separation concentrate, and then added to the harvest.
  • the dodecylamine was stirred for 4 minutes, the dodecylamine was added in an amount of 200 g/t magnetic separation concentrate, and the foaming agent pine oil was added and stirred for 4 minutes.
  • the amount of pine oil was 10 g/t magnetic separation concentrate.
  • 4 minutes of reverse flotation is selected, and the silicon tailings are sorted to obtain a reverse flotation coarse concentrate;
  • the first reverse flotation selection of a reverse flotation tailings is returned to the third flotation agent in step 3 (2) with inhibitor water glass, collector dodecylamine and foaming agent pine oil.
  • the reverse flotation coarse selection is carried out together;
  • the second reverse flotation tailings obtained in the second reverse flotation are returned in step 3 (3) with the reverse flotation coarseness of the collector dodecylamine
  • the first reverse flotation selection was carried out together.
  • Step 4 Positive flotation to remove calcium-containing minerals
  • the obtained brucite concentrate contains the components and the weight percentages of the respective components: MgO is 67.98%, and SiO 2 is 0.33. %, CaO is 0.27%, TFe is 0.21%, and LOI is 30.75% balance is impurities;
  • the first positive flotation tailings obtained from the first positive flotation are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is performed together.
  • the second positive flotation tailings obtained by the second positive flotation selection are returned to the positive flotation coarse-concentrated concentrate slurry with the sodium oleate of the collector, and the first positive flotation is performed together. selected;
  • the weight of MgO in the brucite concentrate obtained in this example accounts for 81.19% of the total weight of MgO in the raw material.

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Abstract

An efficient purification method for high-silicon, high-calcium, high-iron and low-grade brucite, relating to the technical field of mineral processing. The method comprises: (1) performing grinding on high-silicon, high-calcium, high-iron and low-grade brucite; (2) performing magnetic separation on the material subjected to grinding to remove iron-bearing gangue minerals; (3) adding water to the magnetic concentrate for pulp conditioning, then adding an inhibitor, a collector, and a foaming agent for reverse flotation roughing concentration, and performing reverse flotation concentrating on the obtained reverse flotation rough concentrate once or twice to obtain desiliconized concentrate; and (4) adding water to the desiliconized concentrate for pulp conditioning, adjusting the pH value, adding the inhibitor and the collector, stirring, performing direct flotation roughing concentration, and performing direct flotation concentrating on the obtained decalcified concentrate once or twice to obtain brucite concentrate.

Description

高硅高钙高铁低品级水镁石的高效提纯方法High-efficiency purification method of high silicon high calcium high iron low grade brucite 技术领域Technical field
本发明属于矿物加工技术领域，具体涉及一种高硅高钙高铁低品级水镁石的高效提纯方法。The invention belongs to the technical field of mineral processing, and particularly relates to an efficient purification method of high silicon high calcium high iron low grade brucite.
背景技术Background technique
水镁石又名氢氧镁石，是一种重要的非金属矿产资源，在工业中主要用来生产镁质耐火材料，如钢铁工业所需的镁碳砖、镁铬砖等；还可以聚丙烯为基体制作高档无机阻燃剂、镁胶合剂、陶瓷等。Brucite, also known as hydrated magnesia, is an important non-metallic mineral resource. It is mainly used in the industry to produce magnesia refractories, such as magnesia carbon bricks and magnesia chrome bricks required by the steel industry. Propylene is used as a matrix to produce high-grade inorganic flame retardants, magnesium binders, ceramics, and the like.
我国是水镁石资源储量较为丰富的国家，目前已经探明的水镁石资源储量已超过3000万吨，储量居世界首位，主要分布在陕西宁强、辽宁凤城、吉林集安等地区。我国的水镁石资源多数自然品位较高，致使许多水镁石矿山仅开采优质水镁石矿石，大量低品级水镁石都未能有效利用，造成水镁石这种不可再生资源的极大浪费。随着优质水镁石矿产资源的日益匮乏以及镁质耐火材料市场的不断扩大，对高硅高钙高铁低品级水镁石资源进行有效开发利用的需求迫在眉睫，发明一种高效的高硅高钙高铁低品级水镁石的提纯方法是目前急需解决的问题。China is a country with rich reserves of brucite resources. At present, the proven reserves of brucite resources have exceeded 30 million tons, and the reserves rank first in the world, mainly distributed in Ningqiang, Liaoning, Fengcheng, Liaoning, and Ji'an, Jilin. Most of the brucite resources in China have high natural grades, which causes many brucite mines to mine only high-quality brucite ore. A large number of low-grade brucites have not been effectively utilized, resulting in the great non-renewable resources of brucite. waste. With the increasing shortage of high-quality brucite mineral resources and the expanding market of magnesia refractories, the demand for effective development and utilization of high-silicon, high-calcium, high-iron and low-grade brucite resources is imminent, and an efficient high-silicon high-calcium is invented. The purification method of high-grade low-grade brucite is an urgent problem to be solved.
专利CN201210003429.7公开了一种高硅高钙低品级水镁石的分步浮选方法，其要点是运用分步浮选方法，第一步反浮选分选出大部分含钙脉石矿物，第二步正浮选分选出水镁石，但该专利未提出对高硅高钙高铁型水镁石矿的提纯方法，由于水镁石中含铁脉石矿物的存在会恶化浮选环境，降低反浮选及正浮选过程中捕收剂对矿物的捕收能力，导致浮选精矿的指标下降。目前针对高硅高钙高铁型低品位水镁石提纯方法的研究尚未可见，其选矿提纯方法也亟待进一步研究。Patent CN201210003429.7 discloses a step-by-step flotation method for high-silicon high-calcium low-grade brucite. The main point is to use fractional flotation method, the first step of reverse flotation to sort out most of the calcium-containing gangue minerals. In the second step, flotation is selected by flotation, but the patent does not propose a method for purifying high-silica, high-calcium, high-iron brucite ore. The presence of iron-bearing minerals in brucite deteriorates flotation. The environment reduces the ability of collectors to capture minerals during reverse flotation and positive flotation, resulting in a decrease in the index of flotation concentrates. At present, the research on the purification method of high-silica, high-calcium and high-iron low-grade brucite is not yet visible, and its ore dressing purification method needs further research.
发明内容Summary of the invention
针对现有的浮选工艺难以处理高硅高钙高铁低品级水镁石的问题，本发明提供一种高硅高钙高铁低品级水镁石的高效提纯方法，目的是通过将高硅高钙高铁低品级水镁石用球磨机磨至单体解离，再采用强磁选工艺进行选别，脱除矿石中所含的铁矿物，再采用浮选工艺进行处理，获得适用于生产高档耐火材料的高品级水镁石。In view of the problem that the existing flotation process is difficult to process high-silicon high-calcium high-iron low-grade brucite, the present invention provides a high-purity high-calcium high-calcium high-grade low-grade brucite high-efficiency purification method, aiming at high silicon and high calcium. The high-speed low-grade brucite is ground to a single dissociation by a ball mill, and then selected by a strong magnetic separation process to remove the iron mineral contained in the ore, and then treated by a flotation process to obtain a high-grade fire-resistant material. High grade brucite of material.
本发明的一种高硅高钙高铁低品级水镁石的高效提纯方法，包括以下步骤：The method for efficiently purifying high silicon high calcium high iron low grade brucite of the invention comprises the following steps:
步骤1：球磨Step 1: Ball Mill
将高硅高钙高铁低品级水镁石，进行磨矿至单体解离，得到高硅高钙高铁低品级水镁石 粉，其中，细度≤0.074mm的高硅高钙高铁低品级水镁石粉重量占总高硅高钙高铁低品级水镁石粉重量的70～85％；High silicon high calcium high iron low grade brucite is ground to monomer dissociation to obtain high silicon high calcium high iron low grade brucite powder, among which high silicon high calcium high iron low grade magnesium water with fineness ≤0.074mm The weight of stone powder accounts for 70-85% of the weight of total high silicon high calcium high iron low grade brucite powder;
所述的高硅高钙高铁低品级水镁石，含有的成分及各个成分的质量百分比为：MgO 50～60％，SiO 2 1～10％，CaO 1～10％，TFe 1～10％，LOI 20～30％，余量为杂质； The high silicon high calcium high iron low grade brucite contains the components and the mass percentage of each component: MgO 50-60%, SiO 2 1-10%, CaO 1-10%, TFe 1-10%, LOI 20~30%, the balance is impurity;
步骤2：强磁选Step 2: Strong magnetic separation
将高硅高钙高铁低品级水镁石粉，采用强磁选机进行磁选，磁场强度为0.8～1.0T，脱除高硅高钙高铁低品级水镁石粉中的含铁脉石矿物，得到含铁品位≤0.5％的磁选精矿；High-silica, high-calcium, high-iron, low-grade brucite powder is magnetically selected by a strong magnetic separator. The magnetic field strength is 0.8-1.0T, and the iron-bearing minerals in the high-silica-high-calcium-high-iron low-grade brucite powder are removed. Magnetic separation concentrate containing iron grade ≤0.5%;
步骤3：反浮选脱除含硅矿物Step 3: Reverse flotation to remove silicon-containing minerals
(1)向磁选精矿中，加水，得到磁选精矿的质量浓度为20～30％的原矿浆；(1) adding water to the magnetic separation concentrate to obtain a raw ore slurry having a magnetic separation concentrate having a mass concentration of 20 to 30%;
(2)将原矿浆加入浮选设备中并搅拌均匀后，依次加入抑制剂水玻璃、胺类捕收剂和起泡剂松醇油三种浮选药剂，每次加药后均搅拌2～4min，随后进行反浮选粗选，分选出含硅的尾矿，获得反浮选粗精矿；其中，每种浮选药剂加入量为：每吨磁选精矿中，抑制剂水玻璃加入量为500～1000g，胺类捕收剂加入量为100～300g，起泡剂松醇油加入量为5～15g；(2) After adding the raw ore slurry to the flotation equipment and stirring uniformly, three kinds of flotation reagents, such as inhibitor water glass, amine collector and foaming agent, are added in sequence, and each time the medicine is stirred, 2~ 4min, followed by reverse flotation rough selection, sorting out silicon-containing tailings to obtain reverse flotation coarse concentrate; wherein, each flotation agent is added in an amount: per ton of magnetic separation concentrate, inhibitor water glass The dosage is 500-1000g, the amount of the amine collector is 100-300g, and the foaming agent pine oil is added in an amount of 5-15g;
(3)向反浮选粗精矿中，加入胺类捕收剂并搅拌均匀后，进行1～2次反浮选精选，得到脱硅精矿；其中，每吨反浮选粗精矿，加入胺类捕收剂50～100g；(3) Adding an amine collector to the reverse flotation coarse concentrate, and stirring it uniformly, and then performing 1 to 2 reverse flotation selection to obtain desiliconized concentrate; wherein, each ton of reverse flotation coarse concentrate , adding an amine collector 50-100g;
步骤4：正浮选脱除含钙矿物Step 4: Positive flotation to remove calcium-containing minerals
(1)向脱硅精矿中加水，制得质量浓度为20～30％的脱硅矿浆，向脱硅矿浆中加入NaOH，调节脱硅矿浆的pH值为10～11；(1) adding water to the desiliconized concentrate to obtain a desiliconized slurry having a mass concentration of 20 to 30%, adding NaOH to the desiliconized slurry, and adjusting the pH of the desiliconized slurry to be 10 to 11;
(2)向pH值为10～11的脱硅矿浆中，在搅拌速度为1800～2000rpm下，依次加入抑制剂六偏磷酸钠、捕收剂油酸钠，每次加药后均搅拌2～4min，再进行正浮选粗选，分选出含钙的尾矿，获得正浮选粗精矿；其中，每吨脱硅精矿中，抑制剂六偏磷酸钠的加入量为50～200g，油酸钠的加入量为800～2000g；(2) In the desiliconized slurry with a pH of 10 to 11, the inhibitor sodium hexametaphosphate and the collector sodium oleate are sequentially added at a stirring speed of 1800 to 2000 rpm, and the mixture is stirred after each dosing 2~ 4min, and then carry out rough flotation, sorting out the tailings containing calcium, and obtaining the flotation coarse concentrate; among them, the inhibitor of sodium hexametaphosphate is 50-200g per ton of desiliconized concentrate. , the amount of sodium oleate added is 800-2000g;
(3)向正浮选粗精矿中加水调浆，得到重量浓度为20～40％的正浮选粗精矿浆；(3) adding water to the positive flotation coarse concentrate to adjust the slurry to obtain a positive flotation coarse concentrate slurry with a weight concentration of 20-40%;
向正浮选粗精矿浆中，加入捕收剂油酸钠并搅拌均匀，然后进行1～2次正浮选精选，得到水镁石精矿；其中，每吨正浮选粗精矿中，加入捕收剂油酸钠的质量为300～500g。To the positive flotation coarse ore slurry, add the collector sodium oleate and stir evenly, and then carry out 1~2 times of positive flotation selection to obtain the brucite concentrate; wherein, each ton of positive flotation coarse concentrate The quality of the sodium oleate added to the collector is 300 to 500 g.
所述的步骤3(2)中，原矿浆加入浮选设备中，搅拌均匀的工艺为：搅拌速度为1500～2000rpm，搅拌时间为2～4min。In the step 3 (2), the raw slurry is added to the flotation equipment, and the uniform stirring process is: the stirring speed is 1500-2000 rpm, and the stirring time is 2-4 min.
所述的步骤3(2)中，所述的胺类捕收剂优选为十二胺。In the step 3 (2), the amine collector is preferably dodecylamine.
所述的步骤3(2)中，反浮选粗选的时间优选为3～5min。In the step 3 (2), the time for the reverse flotation rough selection is preferably 3 to 5 minutes.
所述的步骤3(3)中，向反浮选粗精矿中，加入胺类捕收剂后，搅拌均匀的工艺条件为：搅拌速度为1500～2000rpm，搅拌时间为2～4min。In the step 3 (3), after the amine-based collector is added to the reverse flotation coarse concentrate, the mixing conditions are as follows: the stirring speed is 1500-2000 rpm, and the stirring time is 2-4 min.
所述的步骤3(3)中，所述的胺类捕收剂优选为十二胺。In the step 3 (3), the amine collector is preferably dodecylamine.
所述的步骤3(3)中，反浮选精选的时间优选为2～3min。In the step 3 (3), the time for the reverse flotation selection is preferably 2 to 3 minutes.
所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤3(3)中，进行1次反浮选精选时，第一次反浮选精选得到的一次反浮选尾矿返回步骤3(2)中的加入有抑制剂水玻璃、胺类捕收剂、起泡剂松醇油三种浮选药剂的原矿浆中，共同进行反浮选粗选。The high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, in the step 3 (3), when one reverse flotation is selected, the first reverse flotation is selected. The flotation tailings are returned to the raw ore slurry in which three kinds of flotation reagents including inhibitor water glass, amine collector and foaming agent pine alcohol oil are added in step 3 (2), and the reverse flotation is selected together.
所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤3(3)中，当进行2次反浮选精选时，第一次反浮选精选得到的一次反浮选尾矿返回步骤3(2)中的加入有抑制剂水玻璃、胺类捕收剂、起泡剂松醇油三种浮选药剂的原矿浆中，共同进行反浮选粗选；第二次反浮选精选得到的二次反浮选尾矿返回步骤3(3)中的加入有胺类捕收剂的反浮选粗精矿中，共同进行第一次反浮选精选。The high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, in the step 3 (3), when the reverse flotation is selected twice, the first reverse flotation is selected once. The reverse flotation tailings is returned to the raw ore slurry in which three kinds of flotation reagents including inhibitor water glass, amine collector, and foaming agent pine alcohol oil are added in step 3 (2), and the reverse flotation is selected together; The second reverse flotation tailings selected in the second reverse flotation are returned to the reverse flotation coarse concentrate with the amine collector added in step 3 (3), and the first reverse flotation is performed together. selected.
所述的步骤4(2)中，正浮选粗选的时间优选为2～3min。In the step 4 (2), the time for the preliminary flotation rough selection is preferably 2 to 3 minutes.
所述的步骤4(3)中，所述的向正浮选粗精矿浆中，加入捕收剂油酸钠后，搅拌均匀的工艺参数为：搅拌速度为1500～2000rpm，搅拌时间为2～4min。In the step 4 (3), after adding the collector sodium oleate to the positive flotation coarse ore slurry, the process parameters of stirring uniformly are: stirring speed is 1500-2000 rpm, stirring time is 2 ~4min.
所述的步骤4(3)中，正浮选精选的时间优选为2～3min。In the step 4 (3), the time for positive flotation selection is preferably 2 to 3 minutes.
所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤4(3)中，当进行1次正浮选精选时，第一次正浮选精选得到的一次正浮选尾矿返回步骤4(2)中的加入有抑制剂六偏磷酸钠、捕收剂油酸钠的脱硅矿浆中，共同进行正浮选粗选。The high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, in the step 4 (3), when the first positive flotation is selected, the first positive flotation is selected once. The positive flotation tailings are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in the step 4 (2), and the rough flotation is performed together.
所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤4(3)中，当进行2次正浮选精选时，第一次正浮选精选得到的一次正浮选尾矿返回步骤4(2)中的加入有抑制剂六偏磷酸钠、捕收剂油酸钠的脱硅矿浆中，共同进行正浮选粗选；第二次正浮选精选得到的二次正浮选尾矿返回步骤4(3)中的加入有捕收剂油酸钠的正浮选粗精矿浆中，共同进行第一次正浮选精选。The high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, in the step 4 (3), when the positive flotation is selected twice, the first positive flotation is selected once. The positive flotation tailings are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is selected together; the second positive flotation is selected. The obtained secondary positive flotation tailings are returned to the positive flotation coarse ore slurry in which the collector sodium silicate is added in the step 4 (3), and the first positive flotation is selected together.
所述的高硅高钙高铁低品级水镁石的高效提纯方法中，对反浮选粗精矿和正浮选粗精矿分别进行反浮选精选和正浮选精选的具体次数取决于原料性质及最终产品的要求。In the high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, the specific number of reverse flotation selection and positive flotation selection for the reverse flotation coarse concentrate and the positive flotation coarse concentrate respectively depends on the raw materials. Nature and requirements of the final product.
所述的高硅高钙高铁低品级水镁石的高效提纯方法中，获得的水镁石精矿，其含有的成分及各个成分的重量百分比分别为：MgO：65～68％，SiO 2≤0.6％，CaO≤0.6％，TFe≤0.5％，LOI 29～31％，余量为杂质。 In the high-purity purification method of the high silicon high calcium high iron low grade brucite, the obtained brucite concentrate contains the components and the weight percentage of each component: MgO: 65 to 68%, SiO 2 ≤ 0.6%, CaO ≤ 0.6%, TFe ≤ 0.5%, LOI 29 ~ 31%, the balance is impurities.
所述的高硅高钙高铁低品级水镁石的高效提纯方法中，获得的水镁石精矿中的MgO回收率按重量百分比为65～85％。In the high-purity purification method of the high silicon high calcium high iron low grade brucite, the MgO recovery rate in the obtained brucite concentrate is 65-85% by weight.
所述的高硅高钙高铁低品级水镁石的高效提纯方法中，利用强磁选机在0.8～1.0T的磁场强度下，通过磁场作用力，脱除水镁石粉中的含铁脉石矿物，使磁选精矿中含铁品位≤0.5％， 从而降低含铁矿物对后续浮选作业的影响。In the high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, the iron-containing gangue in the brucite powder is removed by a magnetic field force at a magnetic field strength of 0.8 to 1.0 T by a strong magnetic separator. The minerals make the iron-containing grade in the magnetic separation concentrate ≤0.5%, thereby reducing the influence of iron-containing minerals on subsequent flotation operations.
与现有技术相比，本发明的高硅高钙高铁低品级水镁石的高效提纯方法，其特点和有益效果是：Compared with the prior art, the high-purity and high-purity high-iron low-grade brucite of the present invention has the characteristics and beneficial effects of:
1.本发明的方法与现有技术相比，所处理的矿石中脉石矿物种类多，矿石品位低，原矿中的SiO 2、CaO、TFe的含量均较高。 1. Compared with the prior art, the method of the invention has many types of gangue minerals, low ore grade, and high content of SiO 2 , CaO and TFe in the ore.
2.本发明的高硅高钙高铁低品级水镁石的提纯方法，第一步先强磁选脱除大部分含铁脉石矿物，改善后续的浮选环境；第二步反浮选脱除了大部分的含硅脉石矿物；第三步正浮选分选出水镁石，脱除含钙脉石矿物。2. The method for purifying high-silica, high-calcium, high-iron and low-grade brucite of the present invention, the first step is to remove most of the iron-containing gangue minerals and improve the subsequent flotation environment; the second step is reverse flotation Except for most of the silicon-containing gangue minerals; the third step is to flocculate the brucite to remove the calcium-containing gangue minerals.
3.本发明的高硅高钙高铁低品级水镁石的提纯方法，对我国同类型低品级水镁石的开发利用提供了一种方法，且该提纯工艺运行平稳，精矿产品质量高，最终可获得MgO品位最低为65％，回收率70～85％的水镁石精矿。3. The method for purifying high-silica, high-calcium, high-iron and low-grade brucite of the invention provides a method for the development and utilization of the same type of low-grade brucite in China, and the purification process runs smoothly and the quality of the concentrate product is high. Finally, a brucite concentrate with a minimum MgO grade of 65% and a recovery of 70-85% can be obtained.
4.本发明的高硅高钙高铁低品级水镁石提纯方法所处理的矿石中钙、硅、铁等脉石矿物含量高，提纯后获得的水镁石精矿纯度高，选别效果好，对我国高硅高钙高铁型低品级水镁石资源的开发利用提供了一种提纯方法，对该类水镁石的的高效利用具有重要意义。4. The high-silicon high-calcium high-iron low-grade brucite purification method of the invention has high content of calcium, silicon, iron and other gangue minerals, and the purified brucite concentrate has high purity and good sorting effect. It provides a purification method for the development and utilization of high-silica, high-calcium and high-iron low-grade brucite resources in China, and the efficient use of such brucites is of great significance.
附图说明DRAWINGS
图1是本发明实施例的高硅高钙高铁低品级水镁石的提纯方法工艺流程图。1 is a process flow diagram of a method for purifying high silicon, high calcium, high iron and low grade brucite according to an embodiment of the present invention.
具体实施方式Detailed ways
下面结合实施例对本发明作进一步的详细说明。The present invention will be further described in detail below with reference to the embodiments.
本发明实施例中采用的十二胺、油酸钠、六偏磷酸钠、NaOH均为化学纯，水玻璃、松醇油为工业级产品。The dodecylamine, sodium oleate, sodium hexametaphosphate and NaOH used in the examples of the present invention are all chemically pure, and the water glass and the pine oil are industrial grade products.
本发明实施例中采用的强磁选设备为XCQS型强磁选机，反浮选设备为XFD Ⅳ型单槽式浮选机，采用的正浮选设备为XFLB型微型闭路连续浮选机。 High intensity magnetic separation device employed in the embodiment of the present invention is a XCQS type strong magnetic separator, reverse flotation device is a single slot XFD Ⅳ flotation machine, flotation equipment used for continuous XFLB closed type micro flotation machine.
本发明实施例中选用的高硅高钙高铁低品级水镁石为辽宁凤城地区矿产，矿石中主要脉石矿物为蛇纹石、白云石、磁铁矿、赤铁矿等，且脉石矿物嵌布粒度较细，有用矿物与脉石矿物较难单体解离。The high-silicon high-calcium high-iron low-grade brucite used in the embodiment of the present invention is a mineral of Fengcheng District, Liaoning Province, and the main gangue minerals in the ore are serpentine, dolomite, magnetite, hematite, etc., and gangue Mineral inlays are finer in size, and useful minerals and gangue minerals are more difficult to dissociate.
本发明实施例的高硅高钙高铁低品级水镁石的提纯方法工艺流程图见图1。The process flow of the method for purifying high silicon high calcium high iron low grade brucite according to the embodiment of the present invention is shown in FIG. 1 .
实施例1Example 1
本实施例选用的高硅高钙高铁低品级水镁石，矿石中主要成分按重量百分比含MgO为51.28％，SiO 2为7.35％，CaO为3.59％，TFe为2.07％，LOI为22.12％，余量为杂质； The high-silicon high-calcium high-iron low-grade brucite used in this embodiment has a main component of MgO of 51.28%, SiO 2 of 7.35%, CaO of 3.59%, TFe of 2.07% and LOI of 22.12%. The balance is impurities;
一种高硅高钙高铁低品级水镁石的高效提纯方法，具体包括以下步骤：An efficient purification method for high silicon high calcium high iron low grade brucite, specifically comprising the following steps:
步骤1：球磨Step 1: Ball Mill
将高硅高钙高铁低品级水镁石经球磨机进行磨矿至单体解离，得到高硅高钙高铁低品级水镁石粉，其中，细度≤0.074mm的高硅高钙高铁低品级水镁石粉重量占总高硅高钙高铁低品级水镁石粉重量的70％；The high silicon high calcium high iron low grade brucite is ground to a single dissociation by a ball mill to obtain high silicon high calcium high iron low grade brucite powder, wherein the high silicon high calcium high iron low grade water with fineness ≤ 0.074 mm Magnesia powder weight accounts for 70% of the total high silicon high calcium high iron low grade brucite powder;
步骤2：强磁选Step 2: Strong magnetic separation
将高硅高钙高铁低品级水镁石粉，采用强磁选机进行磁选，磁场强度为0.8T，脱除高硅高钙高铁低品级水镁石粉中的含铁脉石矿物，即分选出含铁尾矿，得到含铁品位≤0.5％的磁选精矿；The high silicon high calcium high iron low grade brucite powder is magnetically selected by a strong magnetic separator, the magnetic field strength is 0.8T, and the iron gangue mineral in the high silicon high calcium high iron low grade brucite powder is removed, that is, sorting Producing iron tailings to obtain a magnetic separation concentrate containing iron grade ≤0.5%;
步骤3：反浮选脱除含硅矿物Step 3: Reverse flotation to remove silicon-containing minerals
(1)将磁选精矿放入浮选设备中，加水，得到重量浓度为30％的原矿浆；(1) Put the magnetic separation concentrate into the flotation equipment, add water, and obtain the original slurry with a weight concentration of 30%;
(2)将原矿浆加入浮选设备中并搅拌均匀后，在搅拌速度1600rpm条件下，先加入抑制剂水玻璃并搅拌3min，水玻璃加入量为500g/t磁选精矿，再加入捕收剂十二胺并搅拌3min，十二胺的加入量为100g/t磁选精矿，再加入起泡剂松醇油并搅拌3min，松醇油的加入量为15g/t磁选精矿，然后进行3min反浮选粗选，分选出含硅尾矿，获得反浮选粗精矿；(2) After the raw slurry is added to the flotation equipment and stirred evenly, the inhibitor water glass is first added and stirred for 3 minutes at a stirring speed of 1600 rpm, and the water glass is added in a 500 g/t magnetic separation concentrate, and then added to the harvest. The dodecylamine was stirred for 3 min, the dodecylamine was added in an amount of 100 g/t magnetic separation concentrate, and the foaming agent pine oil was added and stirred for 3 min. The amount of pine oil was 15 g/t magnetic separation concentrate. Then, 3 minutes of reverse flotation is selected, and the silicon tailings are sorted to obtain a reverse flotation coarse concentrate;
(3)向反浮选粗精矿中，加入捕收剂十二胺并在搅拌速度1600rpm条件下搅拌3min，搅拌均匀后，进行2次反浮选精选，得到脱硅精矿；其中，每吨反浮选粗精矿，加入捕收剂十二胺100g；每次反浮选精选3min；(3) Adding the collector dodecylamine to the reverse flotation coarse concentrate, stirring at a stirring speed of 1600 rpm for 3 min, stirring uniformly, and performing two reverse flotation selections to obtain a desiliconized concentrate; For each ton of reverse flotation coarse concentrate, add 100g of collector dodeamine; each reverse flotation is selected for 3min;
第一次反浮选精选得到的一次反浮选尾矿返回步骤3(2)中的加入有抑制剂水玻璃、捕收剂十二胺和起泡剂松醇油三种浮选药剂的原矿浆中，共同进行反浮选粗选；第二次反浮选精选得到的一次反浮选尾矿返回步骤3(3)中的加入有捕收剂十二胺的反浮选粗精矿中，共同进行第一次反浮选精选。The first reverse flotation selection of a reverse flotation tailings is returned to the third flotation agent in step 3 (2) with inhibitor water glass, collector dodecylamine and foaming agent pine oil. In the original slurry, the reverse flotation is selected together; the second reverse flotation is selected in a reverse flotation tailings return step 3 (3) with the addition of the dodecylamine antiflotation coarse In the mine, the first reverse flotation selection was carried out together.
步骤4：正浮选脱除含钙矿物Step 4: Positive flotation to remove calcium-containing minerals
(1)向脱硅精矿中加水，制得质量浓度为30％的脱硅矿浆，在搅拌速度为2000rpm的条件下调浆2min，向脱硅矿浆中加入NaOH，调节脱硅矿浆的pH值为10并调浆2min；(1) Adding water to the desiliconized concentrate to obtain a desiliconized slurry with a mass concentration of 30%, and adjusting the slurry at a stirring speed of 2000 rpm for 2 minutes, adding NaOH to the desiliconized slurry to adjust the pH of the desiliconized slurry. 10 and slurry for 2min;
(2)向pH值为10的脱硅矿浆中，在搅拌速度为2000rpm下，加入抑制剂六偏磷酸钠并搅拌3min，六偏磷酸钠加入量为200g/t脱硅精矿，再加入捕收剂油酸钠搅拌3min，油酸钠的加入量为2000g/t脱硅精矿，然后进行3min正浮选粗选，分选出含钙尾矿和正浮选粗精矿；(2) In a desiliconized slurry with a pH of 10, the inhibitor sodium hexametaphosphate was added and stirred for 3 min at a stirring speed of 2000 rpm, and the sodium hexametaphosphate was added in an amount of 200 g/t desiliconized concentrate, and then added to the trap. The sodium oleate was stirred for 3 min, the sodium oleate was added in an amount of 2000 g/t desiliconized concentrate, and then subjected to 3 minutes of positive flotation coarse selection, and the calcium-containing tailings and the positive flotation coarse concentrate were sorted;
(3)向正浮选粗精矿中加入水调浆，得到重量浓度为30％的正浮选粗精矿浆；(3) adding water to the normal flotation coarse concentrate to adjust the slurry to obtain a positive flotation coarse concentrate slurry with a weight concentration of 30%;
向正浮选粗精矿浆中，加入捕收剂油酸钠，在搅拌速度为2000rpm条件下搅拌2min，搅拌均匀后，进行1次正浮选精选3min，得到水镁石精矿；其中，每吨正浮选粗精矿中，加入捕收剂油酸钠的质量为300g。To the positive flotation coarse ore slurry, adding the collector sodium oleate, stirring at a stirring speed of 2000 rpm for 2 min, stirring uniformly, and performing 1 positive flotation for 3 min to obtain a brucite concentrate; In each ton of positive flotation coarse concentrate, the quality of the collector sodium oleate is 300g.
本实施例的高硅高钙高铁低品级水镁石的高效提纯方法中，获得的水镁石精矿，其含有 的成分及各个成分的重量百分比分别为：MgO为67.71％，SiO 2为0.46％，CaO为0.52％，TFe为0.23％，LOI为31％，余量为杂质； In the high-purity purification method of the high silicon high calcium high iron low grade brucite of the present embodiment, the obtained brucite concentrate contains the components and the weight percentages of the respective components: MgO is 67.71%, and SiO 2 is 0.46. %, CaO is 0.52%, TFe is 0.23%, LOI is 31%, and the balance is impurities;
第一次正浮选精选得到的一次正浮选尾矿返回步骤4(2)中的加入有抑制剂六偏磷酸钠、捕收剂油酸钠的脱硅矿浆中，共同进行正浮选粗选。The first positive flotation tailings selected in the first positive flotation are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is performed together. Rough selection.
本实施例所获得的水镁石精矿中MgO重量占原料中MgO总重量的73.38％。The weight of MgO in the brucite concentrate obtained in this example accounts for 73.38% of the total weight of MgO in the raw material.
实施例2Example 2
本实施例所使用的高硅高钙高铁型低品级水镁石原料中主要成分按重量百分比含MgO为58.28％，SiO 2为2.13％，CaO为1.36％，TFe为7.52％，LOI为27.63％，余量为杂质； The high-silicon high-calcium-high-iron type low-grade bauxite raw material used in the present embodiment contains Mg8.2 as a weight percentage of 58.28%, SiO 2 as 2.13%, CaO of 1.36%, TFe of 7.52%, and LOI of 27.63%. The balance is impurities;
一种高硅高钙高铁低品级水镁石的高效提纯方法，包括以下步骤：An efficient purification method for high silicon high calcium high iron low grade brucite, comprising the following steps:
步骤1：球磨Step 1: Ball Mill
将高硅高钙高铁低品级水镁石进行磨矿至单体解离，得到高硅高钙高铁低品级水镁石粉，其中，细度≤0.074mm的高硅高钙高铁低品级水镁石粉重量占总高硅高钙高铁低品级水镁石粉重量的85％；High silicon high calcium high iron low grade brucite is ground to monomer dissociation to obtain high silicon high calcium high iron low grade brucite powder, among which high silicon high calcium high iron low grade brucite powder with fineness ≤0.074mm The weight accounts for 85% of the total high silicon high calcium high iron low grade brucite powder;
步骤2：强磁选Step 2: Strong magnetic separation
将高硅高钙高铁低品级水镁石粉，采用强磁选机进行磁选，磁场强度为1.0T，脱除高硅高钙高铁低品级水镁石粉中的含铁脉石矿物，即分选出含铁尾矿，得到含铁品位≤0.5％的磁选精矿；The high-silicon high-calcium high-iron low-grade brucite powder is magnetically selected by a strong magnetic separator, and the magnetic field strength is 1.0T. The iron-bearing gangue mineral in the high-silica high-calcium high-iron low-grade brucite powder is removed, that is, sorting Producing iron tailings to obtain a magnetic separation concentrate containing iron grade ≤0.5%;
步骤3：反浮选脱除含硅矿物Step 3: Reverse flotation to remove silicon-containing minerals
(1)将磁选精矿放入浮选设备中，然后加水制成重量浓度30％的原矿浆；(1) placing the magnetic separation concentrate into a flotation device, and then adding water to prepare a raw slurry having a weight concentration of 30%;
(2)将原矿浆加入浮选设备中并搅拌均匀后，在搅拌速度2000rpm条件下，先加入抑制剂水玻璃并搅拌2min，水玻璃加入量为1000g/t磁选精矿，再加入捕收剂十二胺并搅拌2min，十二胺的加入量为300g/t磁选精矿，再加入起泡剂松醇油并搅拌2min，松醇油的加入量为5g/t磁选精矿，然后进行3min反浮选粗选，分选出含硅尾矿，获得反浮选粗精矿；(2) After adding the original slurry to the flotation equipment and stirring evenly, the inhibitor water glass is first added and stirred for 2 min at a stirring speed of 2000 rpm, and the water glass is added in an amount of 1000 g/t magnetic separation concentrate, and then added to the harvest. The dodecylamine was stirred for 2 min, the dodecylamine was added in an amount of 300 g/t magnetic separation concentrate, and the foaming agent pine oil was added and stirred for 2 min. The amount of pine oil was 5 g/t magnetic separation concentrate. Then, 3 minutes of reverse flotation is selected, and the silicon tailings are sorted to obtain a reverse flotation coarse concentrate;
(3)向反浮选粗精矿中，加入捕收剂十二胺，在搅拌速度2000rpm条件下搅拌2min，搅拌均匀后，进行1次反浮选精选，得到脱硅精矿；其中，每吨反浮选粗精矿，加入捕收剂十二胺为50g，每次反浮选精选3min；(3) Adding the collector dodecylamine to the reverse flotation coarse concentrate, stirring at a stirring speed of 2000 rpm for 2 min, stirring uniformly, and performing one reverse flotation selection to obtain a desiliconized concentrate; For each ton of reverse flotation coarse concentrate, add 10g of collector dodeamine, and select each reverse flotation for 3min;
第一次反浮选精选得到的一次反浮选尾矿返回步骤3(2)中的加入有抑制剂水玻璃、捕收剂十二胺和起泡剂松醇油三种浮选药剂的原矿浆中，共同进行反浮选粗选；The first reverse flotation selection of a reverse flotation tailings is returned to the third flotation agent in step 3 (2) with inhibitor water glass, collector dodecylamine and foaming agent pine oil. In the original slurry, the reverse flotation is selected together;
步骤4：正浮选脱除含钙矿物Step 4: Positive flotation to remove calcium-containing minerals
(1)向脱硅精矿中加水，制得质量浓度为30％的脱硅矿浆，在搅拌速度为1800rpm的条件下调浆2min，然后向脱硅矿浆中加入NaOH调节矿浆pH值为11并调浆2min；(1) Adding water to the desiliconized concentrate to obtain a desiliconized slurry with a mass concentration of 30%, and adjusting the slurry at a stirring speed of 1800 rpm for 2 minutes, then adding NaOH to the desiliconized slurry to adjust the pH of the slurry to 11 and adjust Slurry 2min;
(2)向pH值为11的脱硅矿浆中，在搅拌速度为1800rpm下，然后加入抑制剂六偏磷酸钠并搅拌2min，六偏磷酸钠加入量为50g/t脱硅精矿，再加入捕收剂油酸钠搅拌3min，油酸钠的加入量为800g/t脱硅精矿，然后进行4min正浮选粗选，分选出含钙尾矿和正浮选粗精矿；(2) In a desiliconized slurry with a pH of 11, at a stirring speed of 1800 rpm, then adding the inhibitor sodium hexametaphosphate and stirring for 2 min, the sodium hexametaphosphate is added in an amount of 50 g/t desiliconized concentrate, and then added. The collector sodium oleate was stirred for 3 min, the sodium oleate was added in an amount of 800 g/t desiliconized concentrate, and then subjected to 4 minutes of positive flotation coarse selection, and the calcium-containing tailings and the positive flotation coarse concentrate were sorted;
(3)向正浮选粗精矿中加入水调浆，得到重量浓度为20％的正浮选粗精矿浆；(3) adding water to the normal flotation coarse concentrate to adjust the slurry to obtain a positive flotation coarse concentrate slurry with a weight concentration of 20%;
向正浮选粗精矿浆中，加入捕收剂油酸钠，在搅拌速度为1800rpm条件下搅拌3min，搅拌均匀后，进行2次正浮选精选4min，得到水镁石精矿；其中，每吨正浮选粗精矿中，加入捕收剂油酸钠的质量为500g。To the positive flotation coarse ore slurry, adding the collector sodium oleate, stirring at a stirring speed of 1800 rpm for 3 min, stirring uniformly, and performing 2 positive flotation selection for 4 min to obtain a brucite concentrate; In each ton of positive flotation coarse concentrate, the quality of the collector sodium oleate is 500g.
本实施例的高硅高钙高铁低品级水镁石的高效提纯方法中，获得的水镁石精矿，其含有的成分及各个成分的重量百分比分别为：MgO为67.23％，SiO 2为0.23％，CaO为0.31％，TFe为0.36％，LOI为29％，余量为杂质； In the high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite of the present embodiment, the obtained brucite concentrate contains the components and the weight percentages of the respective components: MgO is 67.23%, and SiO 2 is 0.23. %, CaO is 0.31%, TFe is 0.36%, LOI is 29%, and the balance is impurities;
第一次正浮选精选获得的一次正浮选尾矿返回步骤4(2)中的加入有抑制剂六偏磷酸钠和捕收剂油酸钠的脱硅矿浆中，共同进行正浮选粗选，第二次正浮选精选获得的二次正浮选尾矿返回到加入有捕收剂油酸钠的正浮选粗选精矿浆中，共同进行第一次正浮选精选；The first positive flotation tailings obtained from the first positive flotation are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is performed together. In the rough selection, the second positive flotation tailings obtained by the second positive flotation selection are returned to the positive flotation coarse-concentrated concentrate slurry with the sodium oleate of the collector, and the first positive flotation is performed together. selected;
本实施例所获得的水镁石精矿中MgO重量占原料中MgO总重量的83.51％。The weight of MgO in the brucite concentrate obtained in this example accounts for 83.51% of the total weight of MgO in the raw material.
实施例3Example 3
本实施例所使用的高硅高钙高铁型低品级水镁石原料中主要成分按重量百分比含MgO为54.57％，SiO 2为5.14％，CaO为6.78％，TFe为4.81％，LOI为25.53％，余量为杂质； The high-silicon high-calcium-high-iron type low-grade bauxite raw material used in the present embodiment contains MgO of 54.57%, SiO 2 of 5.14%, CaO of 6.78%, TFe of 4.81% and LOI of 25.53% by weight. The balance is impurities;
一种高硅高钙高铁低品级水镁石的高效提纯方法，包括以下步骤：An efficient purification method for high silicon high calcium high iron low grade brucite, comprising the following steps:
步骤1：球磨Step 1: Ball Mill
将高硅高钙高铁低品级水镁石经球磨机至单体解离，得到高硅高钙高铁低品级水镁石粉，其中，细度≤0.074mm的高硅高钙高铁低品级水镁石粉重量占总高硅高钙高铁低品级水镁石粉重量的80％；High silicon high calcium high iron low grade brucite is dissociated from the ball mill to the monomer to obtain high silicon high calcium high iron low grade brucite powder, wherein the fine silicon high calcium high iron low grade brucite powder weight less than 0.074mm 80% of the total high silicon high calcium high iron low grade brucite powder;
步骤2：强磁选Step 2: Strong magnetic separation
将高硅高钙高铁低品级水镁石粉，采用强磁选机进行磁选，磁场强度为0.8T，脱除高硅高钙高铁低品级水镁石粉中的含铁脉石矿物，即分选出含铁尾矿，得到含铁品位≤0.5％的磁选精矿；The high silicon high calcium high iron low grade brucite powder is magnetically selected by a strong magnetic separator, the magnetic field strength is 0.8T, and the iron gangue mineral in the high silicon high calcium high iron low grade brucite powder is removed, that is, sorting Producing iron tailings to obtain a magnetic separation concentrate containing iron grade ≤0.5%;
步骤3：反浮选脱除含硅矿物Step 3: Reverse flotation to remove silicon-containing minerals
(1)将磁选精矿放入浮选设备中，然后加水制成重量浓度20％的原矿浆；(1) placing the magnetic separation concentrate into a flotation device, and then adding water to prepare a raw slurry having a weight concentration of 20%;
(2)将原矿浆加入浮选设备中并搅拌均匀后，在搅拌速度1800rpm条件下，先加入抑制剂水玻璃并搅拌4min，水玻璃加入量为800g/t磁选精矿，再加入捕收剂十二胺并搅拌4min，十二胺的加入量为200g/t磁选精矿，再加入起泡剂松醇油并搅拌4min，松醇油的加入量为 10g/t磁选精矿，然后进行4min反浮选粗选，分选出含硅尾矿，获得反浮选粗精矿；(2) After the raw slurry is added to the flotation equipment and stirred evenly, the inhibitor water glass is first added and stirred for 4 minutes under the stirring speed of 1800 rpm, and the water glass is added in an amount of 800 g/t magnetic separation concentrate, and then added to the harvest. The dodecylamine was stirred for 4 minutes, the dodecylamine was added in an amount of 200 g/t magnetic separation concentrate, and the foaming agent pine oil was added and stirred for 4 minutes. The amount of pine oil was 10 g/t magnetic separation concentrate. Then, 4 minutes of reverse flotation is selected, and the silicon tailings are sorted to obtain a reverse flotation coarse concentrate;
(3)向反浮选粗精矿中，加入捕收剂十二胺并在搅拌速度1800rpm条件下搅拌4min，搅拌均匀后，进行2次反浮选精选，得到脱硅精矿；其中，每吨反浮选粗精矿，加入捕收剂十二胺70g；每次反浮选精选4min；(3) Adding the collector dodecylamine to the reverse flotation coarse concentrate, stirring at a stirring speed of 1800 rpm for 4 min, stirring uniformly, and performing two reverse flotation selections to obtain a desiliconized concentrate; For each ton of reverse flotation coarse concentrate, add 10g of collector dodecylamine; each reverse flotation is selected for 4min;
第一次反浮选精选得到的一次反浮选尾矿返回步骤3(2)中的加入有抑制剂水玻璃、捕收剂十二胺和起泡剂松醇油三种浮选药剂的原矿浆中，共同进行反浮选粗选；第二次反浮选精选得到的二次反浮选尾矿返回步骤3(3)中的加入有捕收剂十二胺的反浮选粗精矿中，共同进行第一次反浮选精选。The first reverse flotation selection of a reverse flotation tailings is returned to the third flotation agent in step 3 (2) with inhibitor water glass, collector dodecylamine and foaming agent pine oil. In the original slurry, the reverse flotation coarse selection is carried out together; the second reverse flotation tailings obtained in the second reverse flotation are returned in step 3 (3) with the reverse flotation coarseness of the collector dodecylamine In the concentrate, the first reverse flotation selection was carried out together.
步骤4：正浮选脱除含钙矿物Step 4: Positive flotation to remove calcium-containing minerals
(1)向脱硅精矿中加水，制得质量浓度为20％的脱硅矿浆，在搅拌速度为2000rpm的条件下调浆4min，然后加入NaOH调节矿浆pH值为10并调浆4min；(1) adding water to the desiliconized concentrate to obtain a desiliconized slurry having a mass concentration of 20%, and slurrying at a stirring speed of 2000 rpm for 4 minutes, then adding NaOH to adjust the pH of the slurry to 10 and slurrying for 4 minutes;
(2)向pH值为10的脱硅矿浆中，在搅拌速度为2000rpm下，然后加入抑制剂六偏磷酸钠并搅拌4min，六偏磷酸钠加入量为150g/t脱硅精矿，再加入捕收剂油酸钠搅拌4min，油酸钠的加入量为1500g/t脱硅精矿，然后进行4min正浮选粗选，分选出含钙尾矿和正浮选粗精矿；(2) In a desiliconized slurry with a pH of 10, at a stirring speed of 2000 rpm, then adding the inhibitor sodium hexametaphosphate and stirring for 4 min, the sodium hexametaphosphate is added in a 150 g/t desiliconized concentrate, and then added. The collector sodium oleate was stirred for 4 min, the sodium oleate was added in an amount of 1500 g/t desiliconized concentrate, and then subjected to 4 minutes of positive flotation coarse selection, and the calcium-containing tailings and the positive flotation coarse concentrate were sorted;
(3)向正浮选粗精矿中加入水调浆，得到重量浓度为40％的正浮选粗精矿浆；(3) adding water to the normal flotation coarse concentrate to adjust the slurry to obtain a positive flotation coarse concentrate slurry with a weight concentration of 40%;
向正浮选粗精矿浆中，加入捕收剂油酸钠在搅拌速度为2000rpm条件下搅拌4min，搅拌均匀后，进行2次正浮选精选4min，得到水镁石精矿；其中，每吨正浮选粗精矿中，加入捕收剂油酸钠的质量为400g。To the positive flotation coarse ore slurry, adding the collector sodium oleate and stirring at a stirring speed of 2000 rpm for 4 min, stirring uniformly, and performing 2 times of positive flotation for 4 min to obtain a brucite concentrate; The mass of the collector sodium oleate is 400g per ton of positive flotation concentrate.
本实施例的高硅高钙高铁低品级水镁石的高效提纯方法中，获得的水镁石精矿，其含有的成分及各个成分的重量百分比分别为：MgO为67.98％，SiO 2为0.33％，CaO为0.27％，TFe为0.21％，LOI为30.75％余量为杂质； In the high-purity purification method of the high-silicon high-calcium-high-iron low-grade brucite of the present embodiment, the obtained brucite concentrate contains the components and the weight percentages of the respective components: MgO is 67.98%, and SiO 2 is 0.33. %, CaO is 0.27%, TFe is 0.21%, and LOI is 30.75% balance is impurities;
第一次正浮选精选获得的一次正浮选尾矿返回步骤4(2)中的加入有抑制剂六偏磷酸钠和捕收剂油酸钠的脱硅矿浆中，共同进行正浮选粗选，第二次正浮选精选获得的二次正浮选尾矿返回到加入有捕收剂油酸钠的正浮选粗选精矿浆中，共同进行第一次正浮选精选；The first positive flotation tailings obtained from the first positive flotation are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is performed together. In the rough selection, the second positive flotation tailings obtained by the second positive flotation selection are returned to the positive flotation coarse-concentrated concentrate slurry with the sodium oleate of the collector, and the first positive flotation is performed together. selected;
本实施例所获得的水镁石精矿中MgO重量占原料中MgO总重量的81.19％。The weight of MgO in the brucite concentrate obtained in this example accounts for 81.19% of the total weight of MgO in the raw material.

Claims (10)

  1. 一种高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，包括以下步骤：An efficient purification method for high silicon high calcium high iron low grade brucite, characterized in that it comprises the following steps:
    步骤1：球磨Step 1: Ball Mill
    将高硅高钙高铁低品级水镁石，进行磨矿至单体解离，得到高硅高钙高铁低品级水镁石粉，其中，细度≤0.074mm的高硅高钙高铁低品级水镁石粉重量占总高硅高钙高铁低品级水镁石粉重量的70～85％；High silicon high calcium high iron low grade brucite is ground to monomer dissociation to obtain high silicon high calcium high iron low grade brucite powder, among which high silicon high calcium high iron low grade magnesium water with fineness ≤0.074mm The weight of stone powder accounts for 70-85% of the weight of total high silicon high calcium high iron low grade brucite powder;
    所述的高硅高钙高铁低品级水镁石，含有的成分及各个成分的质量百分比为：MgO 50～60％，SiO 2 1～10％，CaO 1～10％，TFe 1～10％，LOI 20～30％，余量为杂质； The high-silicon high-speed low-grade calcium brucite, and the component containing the mass percentage of each component is: MgO 50 ~ 60%, SiO 2 1 ~ 10%, CaO 1 ~ 10%, TFe 1 ~ 10%, LOI 20~30%, the balance is impurity;
    步骤2：强磁选Step 2: Strong magnetic separation
    将高硅高钙高铁低品级水镁石粉，采用强磁选机进行磁选，磁场强度为0.8～1.0T，脱除高硅高钙高铁低品级水镁石粉中的含铁脉石矿物，得到含铁品位≤0.5％的磁选精矿；High-silica, high-calcium, high-iron, low-grade brucite powder is magnetically selected by a strong magnetic separator. The magnetic field strength is 0.8-1.0T, and the iron-bearing minerals in the high-silica-high-calcium-high-iron low-grade brucite powder are removed. Magnetic separation concentrate containing iron grade ≤0.5%;
    步骤3：反浮选脱除含硅矿物Step 3: Reverse flotation to remove silicon-containing minerals
    (1)向磁选精矿中，加水，得到磁选精矿的质量浓度为20～30％的原矿浆；(1) adding water to the magnetic separation concentrate to obtain a raw ore slurry having a magnetic separation concentrate having a mass concentration of 20 to 30%;
    (2)将原矿浆加入浮选设备中并搅拌均匀后，依次加入抑制剂水玻璃、胺类捕收剂和起泡剂松醇油三种浮选药剂，每次加药后均搅拌2～4min，随后进行反浮选粗选，分选出含硅的尾矿，获得反浮选粗精矿；其中，每种浮选药剂加入量为：每吨磁选精矿中，抑制剂水玻璃加入量为500～1000g，胺类捕收剂加入量为100～300g，起泡剂松醇油加入量为5～15g；(2) After adding the raw ore slurry to the flotation equipment and stirring uniformly, three kinds of flotation reagents, such as inhibitor water glass, amine collector and foaming agent, are added in sequence, and each time the medicine is stirred, 2~ 4min, followed by reverse flotation rough selection, sorting out silicon-containing tailings to obtain reverse flotation coarse concentrate; wherein, each flotation agent is added in an amount: per ton of magnetic separation concentrate, inhibitor water glass The dosage is 500-1000g, the amount of the amine collector is 100-300g, and the foaming agent pine oil is added in an amount of 5-15g;
    (3)向反浮选粗精矿中，加入胺类捕收剂并搅拌均匀后，进行1～2次反浮选精选，得到脱硅精矿；其中，每吨反浮选粗精矿，加入胺类捕收剂50～100g；(3) Adding an amine collector to the reverse flotation coarse concentrate, and stirring it uniformly, and then performing 1 to 2 reverse flotation selection to obtain desiliconized concentrate; wherein, each ton of reverse flotation coarse concentrate , adding an amine collector 50-100g;
    步骤4：正浮选脱除含钙矿物Step 4: Positive flotation to remove calcium-containing minerals
    (1)向脱硅精矿中加水，制得质量浓度为20～30％的脱硅矿浆，向脱硅矿浆中加入NaOH，调节脱硅矿浆的pH值为10～11；(1) adding water to the desiliconized concentrate to obtain a desiliconized slurry having a mass concentration of 20 to 30%, adding NaOH to the desiliconized slurry, and adjusting the pH of the desiliconized slurry to be 10 to 11;
    (2)向pH值为10～11的脱硅矿浆中，在搅拌速度为1800～2000rpm下，依次加入抑制剂六偏磷酸钠、捕收剂油酸钠，每次加药后均搅拌2～4min，再进行正浮选粗选，分选出含钙的尾矿，获得正浮选粗精矿；其中，每吨脱硅精矿中，抑制剂六偏磷酸钠的加入量为50～200g，油酸钠的加入量为800～2000g；(2) In the desiliconized slurry with a pH of 10 to 11, the inhibitor sodium hexametaphosphate and the collector sodium oleate are sequentially added at a stirring speed of 1800 to 2000 rpm, and the mixture is stirred after each dosing 2~ 4min, and then carry out rough flotation, sorting out the tailings containing calcium, and obtaining the flotation coarse concentrate; among them, the inhibitor of sodium hexametaphosphate is 50-200g per ton of desiliconized concentrate. , the amount of sodium oleate added is 800-2000g;
    (3)向正浮选粗精矿中加水调浆，得到重量浓度为20～40％的正浮选粗精矿浆；(3) adding water to the positive flotation coarse concentrate to adjust the slurry to obtain a positive flotation coarse concentrate slurry with a weight concentration of 20-40%;
    向正浮选粗精矿浆中，加入捕收剂油酸钠并搅拌均匀，然后进行1～2次正浮选精选，得到水镁石精矿；其中，每吨正浮选粗精矿中，加入捕收剂油酸钠的质量为300～500g。To the positive flotation coarse ore slurry, add the collector sodium oleate and stir evenly, and then carry out 1~2 times of positive flotation selection to obtain the brucite concentrate; wherein, each ton of positive flotation coarse concentrate The quality of the sodium oleate added to the collector is 300 to 500 g.
  2. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的步骤3(2)中，原矿浆加入浮选设备中，搅拌均匀的工艺为：搅拌速度为1500～2000rpm，搅拌时间为2～4min。The method for efficiently purifying high silicon high calcium high iron low grade brucite according to claim 1, wherein in the step 3 (2), the raw slurry is added to the flotation device, and the uniform stirring process is: The stirring speed is 1500 to 2000 rpm, and the stirring time is 2 to 4 minutes.
  3. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的步骤3(2)中，反浮选粗选的时间为3～5min。The method for efficiently purifying high silicon high calcium high iron low grade brucite according to claim 1, wherein in the step 3 (2), the reverse flotation rough selection time is 3 to 5 min.
  4. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的步骤3(3)中，向反浮选粗精矿中，加入胺类捕收剂后，搅拌均匀的工艺条件为：搅拌速度为1500～2000rpm，搅拌时间为2～4min。The high-purity high-calcium high-calcium low-grade brucite method according to claim 1, wherein in the step 3 (3), the amine floc is added to the reverse flotation coarse concentrate. After the agent, the process conditions of uniform stirring are: stirring speed is 1500-2000 rpm, and stirring time is 2-4 min.
  5. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的步骤3(3)中，反浮选精选的时间为2～3min。The method for efficiently purifying high silicon high calcium high iron low grade brucite according to claim 1, wherein in the step 3 (3), the reverse flotation selection time is 2 to 3 minutes.
  6. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤3(3)中，进行1次反浮选精选时，第一次反浮选精选得到的一次反浮选尾矿返回步骤3(2)中的加入有抑制剂水玻璃、胺类捕收剂、起泡剂松醇油三种浮选药剂的原矿浆中，共同进行反浮选粗选；The method for efficiently purifying high silicon high calcium high iron low grade brucite according to claim 1, characterized in that the high silicon high calcium high iron low grade brucite is highly purified, the step 3 ( 3) In the case of 1 reverse flotation selection, the first reverse flotation selected one reverse flotation tailings return step 3 (2) with inhibitor water glass, amine collector , the foaming agent, pine oil, three kinds of flotation agent in the original slurry, together with the reverse flotation rough selection;
    所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤3(3)中，当进行2次反浮选精选时，第一次反浮选精选得到的一次反浮选尾矿返回步骤3(2)中的加入有抑制剂水玻璃、胺类捕收剂、起泡剂松醇油三种浮选药剂的原矿浆中，共同进行反浮选粗选；第二次反浮选精选得到的二次反浮选尾矿返回步骤3(3)中的加入有胺类捕收剂的反浮选粗精矿中，共同进行第一次反浮选精选。The high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, in the step 3 (3), when the reverse flotation is selected twice, the first reverse flotation is selected once. The reverse flotation tailings is returned to the raw ore slurry in which three kinds of flotation reagents including inhibitor water glass, amine collector, and foaming agent pine alcohol oil are added in step 3 (2), and the reverse flotation is selected together; The second reverse flotation tailings selected in the second reverse flotation are returned to the reverse flotation coarse concentrate with the amine collector added in step 3 (3), and the first reverse flotation is performed together. selected.
  7. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的步骤4(3)中，所述的向正浮选粗精矿浆中，加入捕收剂油酸钠后，搅拌均匀的工艺参数为：搅拌速度为1500～2000rpm，搅拌时间为2～4min，正浮选粗选的时间为2～3min。The method for efficiently purifying high silicon high calcium high iron low grade brucite according to claim 1, wherein in the step 4 (3), the positive flotation coarse coarse ore slurry is added. After the collector sodium oleate, the process parameters of uniform stirring are: stirring speed is 1500-2000 rpm, stirring time is 2~4 min, and the time of rough flotation is 2~3 min.
  8. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的步骤4(3)中，正浮选精选的时间为2～3min。The method for efficiently purifying high silicon high calcium high iron low grade brucite according to claim 1, wherein in the step 4 (3), the positive flotation selection time is 2 to 3 minutes.
  9. 如权利要求1所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征在于，所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤4(3)中，当进行1次正浮选精选时，第一次正浮选精选得到的一次正浮选尾矿返回步骤4(2)中的加入有抑制剂六偏磷酸钠、捕收剂油酸钠的脱硅矿浆中，共同进行正浮选粗选；The method for efficiently purifying high silicon high calcium high iron low grade brucite according to claim 1, characterized in that the high silicon high calcium high iron low grade brucite is highly purified, the step 4 ( 3), when one positive flotation selection is performed, the first positive flotation selected one positive flotation tailings is returned to the step 4 (2) with the addition of the inhibitor sodium hexametaphosphate, and the collection In the desiliconized slurry of sodium oleate, the crude flotation is performed together;
    所述的高硅高钙高铁低品级水镁石的高效提纯方法，所述的步骤4(3)中，当进行2次正浮选精选时，第一次正浮选精选得到的一次正浮选尾矿返回步骤4(2)中的加入有抑制剂六偏磷酸钠、捕收剂油酸钠的脱硅矿浆中，共同进行正浮选粗选；第二次正浮选精选得到的二次正浮选尾矿返回步骤4(3)中的加入有捕收剂油酸钠的正浮选粗精矿浆中，共同进行第一次正浮选精选。The high-purity purification method of the high-silicon high-calcium high-iron low-grade brucite, in the step 4 (3), when the positive flotation is selected twice, the first positive flotation is selected once. The positive flotation tailings are returned to the desiliconized slurry in which the inhibitor sodium hexametaphosphate and the collector sodium oleate are added in step 4 (2), and the positive flotation is selected together; the second positive flotation is selected. The obtained secondary positive flotation tailings are returned to the positive flotation coarse ore slurry in which the collector sodium silicate is added in the step 4 (3), and the first positive flotation is selected together.
  10. 如权利要求1～9任意一项所述的高硅高钙高铁低品级水镁石的高效提纯方法，其特征 在于，所述的高硅高钙高铁低品级水镁石的高效提纯方法中，获得的水镁石精矿，其含有的成分及各个成分的重量百分比分别为：MgO：65～68％，SiO 2≤0.6％，CaO≤0.6％，TFe≤0.5％，LOI 29～31％，余量为杂质。 The method for efficiently purifying high silicon high calcium high iron low grade brucite according to any one of claims 1 to 9, characterized in that, in the high-purity purification method of the high silicon high calcium high iron low grade brucite, The obtained brucite concentrate contains the components and the weight percentages of the respective components: MgO: 65 to 68%, SiO 2 ≤ 0.6%, CaO ≤ 0.6%, TFe ≤ 0.5%, LOI 29 to 31%, The balance is impurities.
PCT/CN2018/087266 2018-05-16 2018-05-17 Efficient purification method for high-silicon, high-calcium, high-iron and low-grade brucite WO2019218295A1 (en)

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