CN107362899B - Heavy flotation ore combination process for treating complex tungsten-molybdenum-copper-lead-zinc polymetallic ore - Google Patents
Heavy flotation ore combination process for treating complex tungsten-molybdenum-copper-lead-zinc polymetallic ore Download PDFInfo
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Abstract
The invention discloses a heavy flotation ore combined process for treating complex tungsten, molybdenum, copper, lead and zinc polymetallic ores, which comprises the following steps of: (1) grinding and reselecting raw ores to obtain tungsten-lead rough concentrates and reselected tailings which are enriched in wolframite and galena; (2) lead flotation is carried out on the tungsten lead rough concentrate to obtain lead rough concentrate and tungsten concentrate, and lead fine concentrate is obtained by lead fine flotation on the lead rough concentrate; (3) carrying out copper-molybdenum mixed separation on the gravity tailings to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum mixed tailings; (4) carrying out copper-molybdenum mixed concentration on the copper-molybdenum mixed rough concentrate to obtain copper-molybdenum mixed concentrate, and carrying out copper-molybdenum separation rough concentration and copper-molybdenum separation fine concentration on the copper-molybdenum mixed concentrate to obtain copper concentrate and molybdenum concentrate; (5) and (4) carrying out zinc roughing and zinc concentrating on the copper-molybdenum mixed tailings in sequence to obtain zinc concentrate. By adopting the process provided by the invention, valuable elements in the complex tungsten, molybdenum, copper, lead and zinc polymetallic ore can be fully recovered, and the resource utilization rate of the complex tungsten, molybdenum, copper, lead and zinc polymetallic ore is improved.
Description
Technical Field
The invention relates to a heavy flotation ore combination process for treating complex tungsten, molybdenum, copper, lead and zinc polymetallic ores.
Background
The polymetallic sulphide ore containing tungsten, molybdenum, copper, lead and zinc has multiple components and low grade, and the wolframite and the galena with high specific gravity are brittle and easy to be crushed, and are not easy to be recycled after being ground and crushed by a section of fine grinding; the floatability of copper, lead and zinc is similar, and the separation is difficult. The process for sorting the ores at home and abroad is usually a process of preferentially selecting molybdenum, copper and lead, then selecting zinc and selecting tungsten by flotation tailings, and the process flow is shown in figure 2. The defects of the traditional process are that the one-time fine grinding is adopted, the galena and the wolframite which are easy to over grind are difficult to recover, the separation of valuable metal minerals is difficult, the impurity content of the concentrate is high, and the recovery rate is low.
Disclosure of Invention
Aiming at the defects of the traditional process, the invention aims to provide a heavy flotation ore combined process for treating complex tungsten, molybdenum, copper, lead and zinc polymetallic ores so as to fully recover valuable elements in similar ores and improve the comprehensive utilization rate of resources.
In order to achieve the purpose, the invention adopts the following technical scheme:
a combined heavy flotation ore process for treating complex tungsten, molybdenum, copper, lead and zinc polymetallic ores comprises the following steps:
(1) grinding and reselecting raw ores to obtain tungsten-lead rough concentrates and reselected tailings which are enriched in wolframite and galena;
(2) lead flotation is carried out on the tungsten lead rough concentrate to obtain lead rough concentrate and tungsten concentrate, and lead fine concentrate is obtained by lead fine flotation on the lead rough concentrate;
(3) carrying out copper-molybdenum mixed separation on the gravity tailings to obtain copper-molybdenum mixed rough concentrate and copper-molybdenum mixed tailings;
(4) carrying out copper-molybdenum mixed concentration on the copper-molybdenum mixed rough concentrate to obtain copper-molybdenum mixed concentrate, and carrying out copper-molybdenum separation rough concentration and copper-molybdenum separation fine concentration on the copper-molybdenum mixed concentrate to obtain copper concentrate and molybdenum concentrate;
(5) and (4) carrying out zinc roughing and zinc concentrating on the copper-molybdenum mixed tailings in sequence to obtain zinc concentrate.
In the complex tungsten-molybdenum-copper-lead-zinc polymetallic ore, tungsten refers to wolframite, lead refers to galena, molybdenum refers to molybdenite, copper refers to chalcopyrite and zinc finger sphalerite; the content of tungsten in the ore is more than or equal to 0.3 percent, the content of molybdenum is more than or equal to 0.01 percent, the content of lead is more than or equal to 1 percent, the content of zinc is more than or equal to 1.5 percent, and the content of copper is more than or equal to 0.2 percent.
Wherein, in the step (1), the ore of the complex tungsten-molybdenum-copper-lead-zinc polymetallic ore (raw ore) is required to be milled to 50-70% of minus 0.074 mm; the equipment used for the reselection was a shaker.
In the step (2), the lead flotation reagent is sodium diethylaminodithiocarbamate and terpineol oil, and the dosage of the sodium diethylaminodithiocarbamate and the terpineol oil is 10-30 g/(t raw ore) and 5-15 g/(t raw ore) respectively; the lead concentration times are 1-3 times, and the lead middlings are returned sequentially.
In the step (3), regrinding or no regrinding is carried out on the gravity tailings, and the grinding fineness is required to be-0.074 mm 70% -95%; and then carrying out copper-molybdenum mixed separation by adopting kerosene and sulfur carbamate to obtain copper-molybdenum mixed rough concentrate.
In the step (4), the copper-molybdenum mixed rough concentrate is refined for 2-4 times to obtain copper-molybdenum mixed concentrate, the copper-molybdenum mixed concentrate is reground or not reground, the grinding fineness is required to be-0.045 mm 65% -95%, copper and molybdenum are separated, sodium sulfide and/or activated carbon are/is used for carrying out reagent removal in the copper-molybdenum separation, and the dosage is 50-1000 g/(t raw ore); sodium thioglycolate is adopted for inhibiting copper, and the dosage is 10-50 g/(t raw ore); collecting molybdenum by adopting kerosene, wherein the using amount of the kerosene is 2.5-15 g/(t of raw ore); separating and concentrating for 2-6 times, returning the obtained middlings in sequence, and separating to obtain final copper concentrate and molybdenum concentrate.
In the step (5), zinc is selected from the copper-molybdenum mixed tailings, and 2-5 kg of lime/(t of raw ore) is added to adjust the pH value to 11.5-12.3; adding 100-500 g of copper sulfate/(t of raw ore) as a zinc activator; adding 10-50 g of sodium xanthate/(t of raw ore) as a collecting agent; and adding 5-25 g/(t of raw ore) of pinitol oil as a foaming agent to obtain zinc rough concentrate, carrying out concentration for 2-4 times, and returning zinc middlings in sequence to obtain the zinc concentrate.
The invention has the beneficial effects that:
by adopting the process provided by the invention, lead concentrate with lead content of more than 40% and lead recovery rate of more than 60% can be obtained; tungsten concentrate containing more than 45% of tungsten trioxide and having tungsten recovery rate of more than 60%; obtaining molybdenum concentrate with more than 45% of molybdenum and more than 65% of molybdenum recovery rate; obtaining copper concentrate with copper content of more than 16% and copper recovery rate of 70%; the zinc concentrate with the zinc content of more than 40 percent and the zinc recovery rate of 70 percent is obtained, and the resource utilization rate of the complex tungsten-molybdenum-copper-lead-zinc polymetallic ore is improved.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
FIG. 2 is a schematic diagram of a process flow of a process for preferentially selecting molybdenum, copper and lead, then selecting zinc, and selecting tungsten from flotation tailings in the prior art.
Detailed Description
The present invention is further illustrated by the following specific examples, which are not intended to be limiting of the invention.
Example 1
The Liaoning ore contains tungsten 0.55%, molybdenum 0.052%, lead 1.12%, zinc 1.52% and copper 0.40%, and other minerals mainly including pyrite, quartz, feldspar and kaolin.
Step I: grinding ore to-0.074 mm 70%; the equipment used for reselection is a shaking table; the lead flotation reagent is sodium diethylamino dithiocarbamate and terpineol oil, and the dosage is respectively 30g/(t raw ore) and 15g/(t raw ore); the lead concentration times are 3, and lead middlings are returned sequentially to obtain final lead concentrate and tungsten concentrate;
step II: re-grinding the gravity tailings, then performing copper-molybdenum mixed separation by adopting kerosene and sulfur-substituted carbamate to obtain copper-molybdenum mixed rough concentrate, performing 4 times of fine separation to obtain copper-molybdenum mixed concentrate, performing re-grinding on the copper-molybdenum mixed concentrate, performing copper-molybdenum separation, wherein the grinding fineness is-0.045 mm 95%, and performing reagent removal on the copper-molybdenum separation by adopting activated carbon, and the dosage is 500g/(t raw ore); sodium thioglycolate is adopted for inhibiting copper, and the dosage is 25g/(t raw ore); collecting molybdenum by adopting kerosene, wherein the consumption is 5g/(t raw ore); separating and concentrating for 4 times, returning the obtained middlings in sequence, and separating to obtain final copper concentrate and molybdenum concentrate;
step III: sorting zinc from the copper-molybdenum mixed tailings in the step II, and adding 2kg of lime/(t of raw ore) to adjust the pH value to 12.2; adding 150g of copper sulfate/(t of raw ore) as a zinc activator; adding 30g of sodium xanthate/(t of raw ore) as a collecting agent; adding 15g/(t raw ore) of pinitol oil as a foaming agent to obtain zinc rough concentrate, carrying out concentration for 3 times, and returning zinc middlings in sequence to obtain the zinc concentrate.
The process flow diagram is shown in fig. 1, and the indexes of the obtained tungsten concentrate, molybdenum concentrate, copper concentrate, lead concentrate and zinc concentrate are shown in table 1.
Example 2
The ore body of the inner Mongolia mineral contains 0.60% of tungsten, 0.07% of molybdenum, 1.5% of lead, 1.8% of zinc and 0.50% of copper, and other minerals mainly comprise pyrite, quartz, feldspar and kaolin.
Step I: grinding ore to-0.074 mm 50%; the equipment used for reselection is a shaking table; the lead flotation reagent is sodium diethylamino dithiocarbamate and terpineol oil, and the dosage is respectively 25g/(t raw ore) and 10g/(t raw ore); the lead concentration times are 3, and lead middlings are returned sequentially to obtain final lead concentrate and tungsten concentrate;
step II: regrinding gravity tailings to-0.074 mm 90%, then carrying out copper-molybdenum mixed separation by adopting kerosene and sulfur-substituted carbamate to obtain copper-molybdenum mixed rough concentrate, carrying out concentration for 4 times to obtain copper-molybdenum mixed concentrate, regrinding the copper-molybdenum mixed concentrate, and carrying out copper-molybdenum separation, wherein the grinding fineness is-0.045 mm 90%, and the dosage of the copper-molybdenum separation is 800g/(t raw ore) by adopting sodium sulfide for removing chemicals; sodium thioglycolate is adopted for inhibiting copper, and the dosage is 40g/(t raw ore); collecting molybdenum by adopting kerosene, wherein the using amount is 10g/(t raw ore); separating and concentrating for 4 times, returning the obtained middlings in sequence, and separating to obtain final copper concentrate and molybdenum concentrate;
step III: sorting zinc from the copper-molybdenum mixed tailings in the step II, and adding lime 3kg/(t raw ore) to adjust the pH value to 12; adding 200g of copper sulfate/(t of raw ore) as a zinc activator; adding 25g of sodium xanthate/(t of raw ore) as a collecting agent; adding 20g/(t raw ore) of pinitol oil as a foaming agent to obtain zinc rough concentrate, carrying out concentration for 3 times, and returning zinc middlings in sequence to obtain the zinc concentrate.
The process flow diagram is shown in fig. 1, and the indexes of the obtained tungsten concentrate, molybdenum concentrate, copper concentrate, lead concentrate and zinc concentrate are shown in table 2.
Comparative example 1
The ore source was the same as in example 1.
Step I: grinding ore to-0.074 mm 70%; molybdenum flotation is carried out, and the used agents are kerosene and terpineol, and the dosage is respectively 30g/(t raw ore) and 15g/(t raw ore); carrying out molybdenum concentration for 4 times, and returning lead middlings in sequence to obtain final molybdenum concentrate;
step II: performing copper-lead mixed separation on molybdenum flotation tailings, performing copper-lead mixed separation by adopting sodium diethylaminodithiocarbamate, thionocarbamate and terpineol oil to obtain copper-lead mixed rough concentrate, performing concentration for 4 times to obtain copper-lead mixed concentrate, performing copper-lead separation by adopting potassium dichromate to inhibit lead and float copper, and performing copper-lead separation by adopting activated carbon for removing pesticide with the dosage of 500g/(t of raw ore); the lead inhibition is carried out by adopting potassium dichromate, and the dosage is 250g/(t raw ore); collecting copper by adopting thionocarbamate, wherein the using amount is 10g/(t of raw ore); separating and concentrating for 4 times, returning the obtained middlings in sequence, and separating to obtain final copper concentrate and lead concentrate;
step III: sorting zinc from the copper-lead mixed tailings in the step II, and adding 2kg of lime/(t of raw ore) to adjust the pH value to 12.2; adding 150g of copper sulfate/(t of raw ore) as a zinc activator; adding 30g of sodium xanthate/(t of raw ore) as a collecting agent; adding 15g/(t raw ore) of pinitol oil as a foaming agent to obtain zinc rough concentrate, carrying out concentration for 3 times, and returning zinc middlings in sequence to obtain the zinc concentrate.
Step IV: and D, performing tungsten reselection on the zinc flotation tailings in the step III to obtain tungsten concentrate.
The process flow diagram is shown in fig. 2, and the indexes of the obtained tungsten concentrate, molybdenum concentrate, copper concentrate, lead concentrate and zinc concentrate are shown in table 1.
Comparative example 2
The ore source was the same as in example 2.
Step I: grinding ore to-0.074 mm 50%; molybdenum flotation is carried out, and the used agents are kerosene and terpineol, and the dosage is respectively 25g/(t raw ore) and 10g/(t raw ore); carrying out molybdenum concentration, wherein the molybdenum concentration is carried out for 4 times, and the lead middlings are returned sequentially to obtain the final molybdenum concentrate;
step II: grinding the molybdenum flotation tailings to 90 percent of minus 0.074mm for copper-lead mixed separation, carrying out copper-lead mixed separation by adopting sodium diethylaminodithiocarbamate, thionocarbamate and terpineol oil to obtain copper-lead mixed rough concentrate, carrying out fine separation for 4 times to obtain copper-lead mixed concentrate, carrying out copper-lead separation by adopting potassium dichromate lead-inhibiting floating copper, and carrying out pesticide removal by adopting activated carbon for copper-lead separation, wherein the dosage is 500g/(t of raw ore); the lead inhibition is carried out by adopting potassium dichromate, and the dosage is 300g/(t raw ore); collecting copper by adopting thionocarbamate, wherein the using amount is 10g/(t of raw ore); separating and concentrating for 4 times, returning the obtained middlings in sequence, and separating to obtain final copper concentrate and lead concentrate;
step III: sorting zinc from the copper-lead mixed tailings obtained in the step II, and adding lime 3kg/(t raw ore) to adjust the pH value to 12; adding 200g of copper sulfate/(t of raw ore) as a zinc activator; adding 25g of sodium xanthate/(t of raw ore) as a collecting agent; adding 20g/(t raw ore) of pinitol oil as a foaming agent to obtain zinc rough concentrate, carrying out concentration for 3 times, and returning zinc middlings in sequence to obtain the zinc concentrate.
Step IV: and D, performing tungsten reselection on the zinc flotation tailings in the step III to obtain tungsten concentrate.
The process flow diagram is shown in fig. 2, and the indexes of the obtained tungsten concentrate, molybdenum concentrate, copper concentrate, lead concentrate and zinc concentrate are shown in table 2.
TABLE 1
TABLE 2
As can be seen from tables 1 and 2, compared with the traditional process, the process provided by the invention greatly improves the mineral separation index and the resource utilization rate, and has remarkable advantages.
Claims (6)
1. A heavy flotation ore combined process for treating complex tungsten, molybdenum, copper, lead and zinc polymetallic ores is characterized by comprising the following steps:
(1) grinding and reselecting raw ores to obtain tungsten-lead rough concentrates and reselected tailings which are enriched in wolframite and galena, and grinding the complex tungsten-molybdenum-copper-lead-zinc polymetallic ores to 50-70% of minus 0.074 mm;
(2) lead flotation is carried out on the tungsten lead rough concentrate to obtain lead rough concentrate and tungsten concentrate, and lead fine concentrate is obtained by lead fine flotation on the lead rough concentrate;
(3) regrinding or regrinding the gravity tailings, wherein the fineness of ground ore is-0.074 mm and 70% -95%; then copper-molybdenum mixed rough concentrate and copper-molybdenum mixed tailings are obtained through copper-molybdenum mixed separation;
(4) carrying out copper-molybdenum separation on the copper-molybdenum bulk concentrate, and carrying out copper-molybdenum separation and rough copper-molybdenum separation and fine copper-molybdenum separation on the copper-molybdenum bulk concentrate to obtain copper concentrate and molybdenum concentrate;
(5) and (4) carrying out zinc roughing and zinc concentrating on the copper-molybdenum mixed tailings in sequence to obtain zinc concentrate.
2. The combined refloatation ore processing complex wulfcraze polymetallic ore according to claim 1, wherein in step (1), the equipment used for the gravity separation is a shaker.
3. The combined heavy flotation ore process for treating the complex tungsten-molybdenum-copper-lead-zinc polymetallic ore according to claim 1, wherein in the step (2), the lead flotation reagents are sodium diethylaminodithiocarbamate and pine oil, and the dosages of the sodium diethylaminodithiocarbamate and the pine oil are respectively 10-30 g/(t raw ore) and 5-15 g/(t raw ore); the lead concentration times are 1-3 times, and the lead middlings are returned sequentially.
4. The combined heavy flotation ore process for treating the complex tungsten-molybdenum-copper-lead-zinc polymetallic ore according to claim 1, characterized in that in the step (3), kerosene and sulfur carbamate are adopted for copper-molybdenum mixed separation to obtain copper-molybdenum mixed rough concentrate.
5. The combined heavy flotation process for treating the complex tungsten-molybdenum-copper-lead-zinc polymetallic ores according to claim 1, characterized in that in the step (4), the copper-molybdenum bulk concentrates are refined for 2-4 times to obtain copper-molybdenum bulk concentrates, and sodium sulfide and/or activated carbon are used for removing the chemicals in the copper-molybdenum separation, wherein the dosage is 50-1000 g/(t of raw ores); sodium thioglycolate is adopted for inhibiting copper, and the dosage is 10-50 g/(t raw ore); collecting molybdenum by adopting kerosene, wherein the using amount of the kerosene is 2.5-15 g/(t of raw ore); separating and concentrating for 2-6 times, returning the obtained middlings in sequence, and separating to obtain final copper concentrate and molybdenum concentrate.
6. The combined heavy flotation process for treating the complex tungsten-molybdenum-copper-lead-zinc polymetallic ores according to claim 1, wherein in the step (5), zinc is selected from copper-molybdenum mixed tailings, 2-5 kg of lime is added/(t of raw ores), and the pH value is adjusted to 11.5-12.3; adding 100-500 g of copper sulfate/(t of raw ore) as a zinc activator; adding 10-50 g of sodium xanthate/(t of raw ore) as a collecting agent; and adding 5-25 g/(t of raw ore) of pinitol oil as a foaming agent to obtain zinc rough concentrate, carrying out concentration for 2-4 times, and returning zinc middlings in sequence to obtain the zinc concentrate.
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| CN109939830B (en) * | 2017-12-21 | 2021-01-22 | 有研工程技术研究院有限公司 | Middling circulation mode reconstruction process based on copper-molybdenum potential regulation and control flotation separation |
| CN108372030A (en) * | 2018-04-23 | 2018-08-07 | 北京矿冶科技集团有限公司 | A kind of method for floating that lead sulphur zinc sequence is preferential |
| CN109092545B (en) * | 2018-07-20 | 2020-10-27 | 太原理工大学 | Gravity-flotation combined sorting device and method |
| CN109806981A (en) * | 2019-02-27 | 2019-05-28 | 北京矿冶科技集团有限公司 | A kind of beneficiation method of copper-molybdenum |
| CN111468302B (en) * | 2020-04-16 | 2021-12-31 | 湖南有色金属研究院 | Beneficiation inhibitor and purification method of molybdenum rough concentrate |
| CN111495579B (en) * | 2020-04-28 | 2022-04-12 | 赣州有色冶金研究所有限公司 | Method for recovering tungsten and tin from fine mud and coarse sand |
| CN112892853B (en) * | 2021-03-11 | 2022-05-10 | 武汉理工大学 | Comprehensive recovery beneficiation process for wolframite and associated valuable metals thereof |
| CN113304875B (en) * | 2021-05-07 | 2022-10-21 | 广东省科学院资源利用与稀土开发研究所 | Dolomite-barite lead-zinc ore full-recycling method |
| CN114534906B (en) * | 2022-03-08 | 2023-11-17 | 昆明冶金研究院有限公司 | Beneficiation method for molybdenum-containing high-zinc complex magnesium silicate-modified silicon-stuck-rock copper ore |
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