CN109954579B - Ore dressing process for apatite and ilmenite - Google Patents
Ore dressing process for apatite and ilmenite Download PDFInfo
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- CN109954579B CN109954579B CN201910246340.5A CN201910246340A CN109954579B CN 109954579 B CN109954579 B CN 109954579B CN 201910246340 A CN201910246340 A CN 201910246340A CN 109954579 B CN109954579 B CN 109954579B
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- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
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Abstract
The invention belongs to the technical field of mineral separation, and provides an apatite and ilmenite two-product mineral separation process which comprises three stages of crushing procedures, a first stage ball milling and cyclone closed circuit, mixed pre-flotation, a second stage ball milling and second stage cyclone closed circuit, weak magnetic separation, strong magnetic separation, magnesium removal rough flotation, magnesium removal fine flotation, titanium and phosphorus separation flotation, a titanium mineral separation sub-process and phosphorus flotation. The process improves the quality of the obtained titanium concentrate by magnetic separation and demagging by flotation, primarily separates titanium and phosphate ores in the mineral products by titanium-phosphorus separation and flotation, and then respectively carries out mineral separation treatment of titanium and phosphorus.
Description
Technical Field
The invention belongs to the technical field of mineral separation, and particularly relates to a mineral separation process for apatite and ilmenite.
Background
Titanium has the advantages of both steel (high strength) and aluminum (light weight), pure titanium has good plasticity, the toughness of the titanium exceeds that of pure iron by 2 times, and the titanium has good heat resistance and corrosion resistance. Because of these advantages, titanium is a prominent rare metal, titanium and its alloys, and has been used in the manufacture of airplanes, rockets, missiles, naval vessels, etc., and has been widely used in the chemical and petroleum sectors.
Ilmenite, the most predominant titanium-containing mineral, is the most important source of metallic titanium, the TiO of which2The theoretical content is 52.66%, and the content of iron is generally between 20% and 30%. The chemical composition of ilmenite is dependent on the formation conditions. Currently, many mines have a large amount of apatite-ilmenite. The ore of mines in similar areas generally contains TiO2TiO content of between 4 and 8 percent2The content is high, and the method has the condition of obtaining high-quality titanium concentrate. It P is2O5Is generally more than 2%, P2O5Mainly in the form of apatite; in addition, the ore is often associated with a certain amount of magnetite and also contains a small amount of pseudohematite, the specific gravity of the iron ore and the ilmenite is similar, the affinity to water is also similar,therefore, the titanium concentrate is easy to enter titanium concentrate along with ilmenite in the gravity separation and flotation of ilmenite, and the grade of the titanium concentrate is not high. The gangue of the ore also contains a certain amount of magnesium-containing mica, and if the magnesium is not removed, the magnesium is finally introduced into the titanium concentrate, so that the quality grade of the titanium concentrate is reduced, and the selling price of the titanium concentrate is reduced. In addition, the phosphorus content of the mineral is high, if the phosphorus can be recovered, the principle of efficient resource recovery is met, and the obtained phosphorus concentrate further increases the economic benefit of a plant.
As can be seen from the above, the raw ore TiO2Higher, P2O5The content of (2) is also high, the content of MgO is also high, and a certain amount of iron minerals are also contained, so that iron and magnesium in the ore must be removed to obtain high-quality titanium fine powder, and phosphorus must be comprehensively recovered to obtain high economic benefit. Therefore, it is necessary to develop a method for effectively increasing TiO content in titanium fine powder2The process for removing iron and magnesium by selecting phosphorus from the apatite-ilmenite effectively reduces the iron content and the MgO content.
Disclosure of Invention
In order to solve the technical problem, the invention provides an apatite and ilmenite two-product beneficiation process which comprises three sections of crushing procedures, a first section of ball milling and cyclone closed circuit, mixed pre-flotation, a second section of ball milling and second section of cyclone closed circuit, weak magnetic separation, strong magnetic separation, magnesium removal rough flotation, magnesium removal fine flotation, titanium and phosphorus separation flotation, a titanium beneficiation sub-process and phosphorus flotation;
after the raw ore is subjected to three-stage crushing procedures, feeding a crushed product with the granularity of 0-12mm into a first-stage ball mill in a closed circuit of a first-stage ball mill and a cyclone, feeding the product after the first-stage ball mill grinds ore into the cyclone, returning settled sand of the cyclone to the first-stage ball mill to form a closed circuit, and feeding the granularity P of the cyclone into a second-stage ball mill to form a second-stage ball mill80Feeding overflow products with the particle size of 60-70 mu m into mixed pre-flotation;
the concentrate of the mixed pre-flotation is fed into a second-stage cyclone in a closed circuit of a second-stage ball mill and a second-stage cyclone, the settled sand of the second-stage cyclone is fed into the second-stage ball mill, the product after the second-stage ball mill and the ore grinding is returned to the second-stage cyclone to form a closed circuit, and P of the second-stage cyclone is80Feeding overflow of 30-40 mu m into low intensity magnetic separation;
the concentrate subjected to the low-intensity magnetic separation is subjected to high-intensity magnetic separation, the concentrate subjected to the high-intensity magnetic separation is subjected to the magnesium removal rough flotation, the underflow concentrate subjected to the magnesium removal rough flotation is subjected to the magnesium removal fine flotation, and the underflow concentrate subjected to the magnesium removal fine flotation is subjected to the titanium-phosphorus separation flotation;
feeding the concentrate subjected to the titanium-phosphorus separation flotation into a titanium ore concentration sub-process, wherein the concentrate of the titanium ore concentration sub-process is titanium concentrate;
the tailings of the titanium-phosphorus separation flotation are subjected to phosphorus flotation, and the concentrate of the phosphorus flotation is phosphorus concentrate;
the tailings of the mixed pre-flotation, the tailings of the low-intensity magnetic separation, the tailings of the high-intensity magnetic separation, the tailings of the magnesium removal rough flotation, the tailings of the magnesium removal fine flotation, the tailings of the titanium beneficiation sub process and the tailings of the phosphorus flotation jointly form process tailings discarding tailings.
Preferably, the mixed pre-flotation comprises mixed pre-rough flotation, mixed pre-fine flotation and three times of mixed pre-sweeping flotation, and the mixed pre-flotation is reverse flotation; feeding overflow products of a cyclone into mixed pre-rough flotation, feeding underflow concentrate of the mixed pre-rough flotation into mixed pre-fine flotation, feeding foam tailings of the mixed pre-rough flotation into first mixed pre-scavenging flotation, feeding foam tailings of the first mixed pre-scavenging flotation into second mixed pre-scavenging flotation, feeding foam tailings of the second mixed pre-scavenging flotation into third mixed pre-scavenging flotation, returning underflow concentrate of the third mixed pre-scavenging flotation to the first mixed pre-scavenging flotation, and returning underflow concentrate of the first mixed pre-scavenging flotation, underflow concentrate of the second mixed pre-scavenging flotation and foam tailings of the mixed pre-fine flotation to the mixed pre-rough flotation; the concentrate of the mixed pre-fine flotation is the concentrate of the mixed pre-flotation, and the tailings of the third mixed pre-scavenging flotation is the tailings of the mixed pre-flotation.
Further, 108-132g of ethylenediamine collecting agent and 18-22g of methyl isobutyl carbinol foaming agent are added into each ton of ore in the mixed pre-coarse flotation; adding 72-88g of ethylenediamine collecting agent and 13-16g of foaming agent methyl isobutyl carbinol into each ton of ore in the mixed pre-fine flotation; and adding 36-45g of ethylenediamine collecting agent and 9-11g of foaming agent methyl isobutyl carbinol into each ton of ore in the first mixed pre-sweeping flotation.
Preferably, the titanium beneficiation sub-process comprises three stages of shaking tables; and feeding the concentrate subjected to titanium-phosphorus separation and flotation into a first-stage table concentrator, feeding the middling subjected to gravity separation by the first-stage table concentrator into a second-stage table concentrator for gravity separation, feeding the middling subjected to gravity separation by the second-stage table concentrator into a third-stage table concentrator for gravity separation, wherein the concentrate subjected to gravity separation by the third-stage table concentrator is the concentrate of the titanium beneficiation sub-process, and the tailings subjected to gravity separation by the third-stage table concentrator are the tailings of the titanium.
Preferably, the phosphorus flotation comprises phosphorus rough flotation, phosphorus scavenging flotation and twice phosphorus fine flotation, and the phosphorus flotation is direct flotation; the tailings of the titanium phosphorus separation flotation are fed into phosphorus rough flotation, the foam concentrate of the phosphorus rough flotation is fed into first phosphorus fine flotation, the concentrate of the first phosphorus fine flotation is fed into second phosphorus fine flotation, the underflow tailings of the phosphorus rough flotation are fed into phosphorus scavenging flotation, the underflow tailings of the second phosphorus fine flotation return to the first phosphorus fine flotation, the underflow tailings of the first phosphorus fine flotation and the foam concentrate of the phosphorus scavenging flotation return to the phosphorus rough flotation, the foam concentrate of the second phosphorus fine flotation is the concentrate of the phosphorus flotation, and the tailings of the phosphorus scavenging flotation is the tailings of the phosphorus flotation.
Further, 135-165g of apatite collecting agent tall oil, 72-88g of gangue inhibitor water glass and 18-22g/t of foaming agent methoxy polypropylene glycol are added into each ton of ore in the phosphorus rough flotation; 81-99g of collecting agent tall oil, 45-55g of gangue inhibitor water glass and 13-16g of foaming agent methoxy polypropylene glycol are added into each ton of fed ores in the first phosphorus fine flotation, and 9-11g of foaming agent methoxy polypropylene glycol is added into each ton of fed ores in the phosphorus scavenging flotation.
Preferably, the magnetic field intensity of the low-intensity magnetic separation is 1800-2200GS, and the magnetic field intensity of the high-intensity magnetic separation is 7200-8800 GS.
Preferably, 220g of PH modifier sulfuric acid, 55-66g of ether amine collecting agent and 13-16g of foaming agent 2# oil are added into each ton of ore in the magnesium removal rough flotation; 27-33g of ether amine collecting agent is added into each ton of feeding ore in the demagging and fine flotation.
Preferably, 135-165g of apatite collector tall oil, 90-110g of ilmenite mineral inhibitor starch and 18-22g of foaming agent methoxypolypropylene glycol are added to each ton of ore in the titanium-phosphorus separation flotation.
Preferably, theThe main useful minerals of the raw ore comprise ilmenite and apatite, and the gangue minerals of the raw ore mainly comprise pyroxene, mica, quartz, magnetite and false hematite; TiO 22Content of (2) is 8.5%, P2O5The raw ore with the content of 2.3 percent, the iron grade of 13.5 percent and the MgO content of 3.5 percent is processed by the two-product ore dressing process of the apatite ilmenite to obtain TiO245.0% of P2O50.05%, 22.6% Fe, 0.45% MgO, TiO2The recovery rate of (D) was 58.0%, P2O5With a recovery rate of 0.24%, a recovery rate of 18.34% of Fe and a recovery rate of 1.41% of MgO, and obtaining TiO2Content of 0.7%, P2O538.0% of (A), 1.3% of Fe, 0.4% of MgO, TiO2The recovery rate of (A) was 0.29%, P2O5The recovery rate of the phosphate concentrate is 58 percent, the recovery rate of the Fe is 0.34 percent, and the recovery rate of the MgO is 0.4 percent.
The process improves the quality of the obtained titanium concentrate by magnetic separation and demagging by flotation, primarily separates titanium and phosphate ores in the mineral products by titanium-phosphorus separation and flotation, and then respectively carries out mineral separation treatment of titanium and phosphorus.
Drawings
FIG. 1 is a schematic flow diagram of an embodiment of a process for beneficiation of apatite ilmenite;
FIG. 2 is a schematic diagram of a hybrid prefloat flow of an example of a two-product beneficiation process for apatite ilmenite;
FIG. 3 is a schematic view of a titanium beneficiation sub-process flow of an example of a apatite ilmenite beneficiation process;
FIG. 4 is a schematic diagram of a phosphorus flotation process of an apatite ilmenite beneficiation process example.
Detailed Description
To further illustrate the technical means and effects of the present invention for solving the technical problems, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited by the scope of the claims.
The flow of the two-product beneficiation process of apatite and ilmenite shown in fig. 1 comprises three stages of crushing step S1001, closed circuit of first stage ball milling S1002 and cyclone S1003, mixed pre-flotation step S1100, closed circuit of second stage ball milling S1005 and second cyclone S1004, low intensity magnetic separation step S1006, high intensity magnetic separation step S1007, magnesium removal coarse flotation step S1008, magnesium removal fine flotation step S1009, titanium phosphorus separation flotation step S1010, titanium beneficiation sub-process step S1200 and phosphorus flotation step S1300;
raw ore TiO2Content of (2) is 8.5%, P2O52.3%, the grade of Fe is 13.5% and the content of MgO is 3.5%; the main components of useful minerals are ilmenite and apatite, the gangue minerals are mainly pyroxene, mica, quartz, magnetite and artificial hematite, after the raw ore is subjected to three-stage crushing procedure S1001, the crushed product with the granularity of 0-12mm is fed into a first-stage ball mill S1002 in a closed circuit of a first-stage ball mill S1002 and a cyclone S1003, the product after the first-stage ball mill S1002 grinds ore is fed into the cyclone S1003, settled sand of the cyclone S1003 returns to the first-stage ball mill S1002 to form a closed circuit, and the granularity P of the cyclone S1003 is P80Feeding overflow products with the particle size of 60-70 mu m into a mixed pre-flotation S1100;
the concentrate of the mixed prefloating S1100 is fed into a second-stage cyclone S1004 in a closed circuit of a second-stage ball milling S1005 and a second-stage cyclone S1004, settled sand of the second-stage cyclone S1004 is fed into the second-stage ball milling S1005, the product ground by the second-stage ball milling S1005 returns to the second-stage cyclone S1004 to form a closed circuit, and a P of the second-stage cyclone S100480Feeding overflow of 30-40 mu m into low-intensity magnetic separation S1006, wherein the magnetic field intensity of the low-intensity magnetic separation S1006 is 2000 GS;
the concentrate obtained by the low-intensity magnetic separation S1006 is fed into a high-intensity magnetic separation S1007, the magnetic field intensity of the high-intensity magnetic separation S1007 is 8000GS, the concentrate yield of the high-intensity magnetic separation S1007 is 53.35 percent, and TiO is2Content 14.42% P2O53.77%, Fe 12.2%, MgO 5.59%, TiO2Recovery rate of (2) was 90.51%, P2O5The recovery rate of the catalyst is 87.53%,The Fe recovery rate is 48.21 percent, the MgO recovery rate is 85.22 percent, the concentrate of the strong magnetic separation S1007 is fed into a magnesium removal rough flotation S1008, the magnesium removal rough flotation S1008 is added with 200g/t of ore feeding of PH regulator sulfuric acid, 60g/t of ore feeding of ether amine collector (flotigam3135) and 15g/t of foaming agent 2# oil, the underflow concentrate of the magnesium removal rough flotation S1008 is fed into a magnesium removal fine flotation S1009, the magnesium removal fine flotation S1009 is added with 30g/t of ether amine collector (flotigam3135), the yield of the underflow concentrate of the magnesium removal fine flotation S1009 is 43.02 percent, and the yield of TiO is 43.02 percent2Content of 17.36% and P2O54.41% of (A), 14.57% of Fe, 0.52% of MgO, TiO2The recovery rate of (A) was 87.85%, and P was2O5The recovery rate of the magnesium removing and fine flotation agent is 82.5 percent, the recovery rate of the Fe is 46.42 percent, the recovery rate of the MgO is 6.4 percent, underflow concentrate of the magnesium removing and fine flotation agent S1009 is fed into a titanium phosphorus separation flotation agent S1010, 150g/t of apatite collecting agent tall oil is added into the titanium phosphorus separation flotation agent S1010, 100g/t of ilmenite mineral inhibitor starch is fed, and 20g/t of foaming agent methoxy polypropylene glycol is added;
the concentrate yield of the titanium-phosphorus separation flotation S1010 is 36.71 percent, and the TiO content is TiO2Content 18.69% P2O50.61%, Fe content 15.51%, MgO content 0.48%, TiO2The recovery rate of (1) was 80.7%, P2O5The recovery rate of (1) was 7.7%, the recovery rate of Fe was 42.18% and the recovery rate of MgO was 5.77%; the concentrate of the titanium-phosphorus separation flotation S1010 is fed into a titanium ore concentration sub-process S1200, the concentrate of the titanium ore concentration sub-process S1200 is titanium concentrate, the yield of the titanium concentrate is 10.96 percent, and TiO is used as the titanium concentrate245.0% of P2O50.05%, 22.6% Fe, 0.45% MgO, TiO2The recovery rate of (D) was 58.0%, P2O5The recovery rate of (1) is 0.24 percent, the recovery rate of Fe is 18.34 percent, and the recovery rate of MgO is 1.41 percent;
the tailings yield of the titanium-phosphorus separation flotation S1010 is 6.31 percent, and TiO is2Content 9.63% P2O527.26% of (A), 9.08% of Fe, 0.35% of MgO, TiO2Recovery rate of (1) was 7.15%, P2O5The recovery rate of (A) was 74.8%, the recovery rate of Fe was 4.24%, and the recovery rate of MgO was0.63%; the tailings of the titanium-phosphorus separation flotation S1010 are fed into phosphorus flotation S1300, the concentrate of the phosphorus flotation S1300 is phosphorus concentrate, the yield of the phosphorus concentrate is 3.51 percent, and TiO is added2Content of 0.7%, P2O538.0% of (A), 1.3% of Fe, 0.4% of MgO, TiO2The recovery rate of (A) was 0.29%, P2O5The recovery rate of the catalyst is 58 percent, the recovery rate of Fe is 0.34 percent, and the recovery rate of MgO is 0.4 percent;
the tailings of the mixed pre-flotation S1100, the tailings of the low-intensity magnetic separation S1006, the tailings of the high-intensity magnetic separation S1007, the tailings of the magnesium-removing rough flotation S1008, the tailings of the magnesium-removing fine flotation S1009, the tailings of the titanium beneficiation sub-process S1200 and the tailings of the phosphorus flotation S1300 jointly form process tailings, the yield of the process tailings is 85.53%, and the yield of the process tailings is TiO 1300%2Content of 4.15% P2O51.12%, Fe 12.84%, MgO 4.02%, TiO2Recovery rate of (2) was 41.71%, P2O5The recovery rate of the process tailings is 41.76 percent, the recovery rate of Fe is 81.32 percent, the recovery rate of MgO is 98.19 percent, and the process tailings are discarded.
In the embodiment shown in fig. 1, a three-stage crushing process, a closed circuit of a first-stage ball mill and a cyclone, a mixed pre-flotation process, a closed circuit of a second-stage ball mill and a second-stage cyclone, a low-intensity magnetic separation process, a strong magnetic separation process, a magnesium-removing rough flotation process, a magnesium-removing fine flotation process, a titanium-phosphorus separation flotation process, a titanium ore dressing sub-process and a phosphorus flotation process are adopted, and tailings with the yield of 36.77 percent are thrown away by the mixed pre-flotation process, and meanwhile, TiO is thrown away2The yield of the product reaches 93.2 percent, and P2O5The yield of the mineral reaches 92.32 percent, a large amount of pyroxene, quartz and other gangue minerals are thrown off on the premise of ensuring the yield of target minerals, the treatment capacity of subsequent operation is greatly reduced, the investment and operation cost is reduced, and the energy consumption is reduced. The fine particles with high dissociation degree for the second stage ball milling and grinding overflow and are subjected to weak magnetic removal of magnetic magnetite and pyrrhotite and then strong magnetic removal of weak magnetic false hematite, the iron grade of the magnetic concentrate is 12.2%, the iron recovery rate is 48.21%, and the iron removal and sulfur reduction effects are very obvious compared with those of weak magnetic feeding. Removing magnesium-containing mica by demagging and demagging, wherein the content of MgO in concentrate is 0.52%, and the content of MgO is reducedThe yield is 6.4%, and the magnesium removal effect is very obvious. Titanium and phosphorus separation flotation is adopted, 150g/t of apatite collecting agent tall oil and 100g/t of ilmenite mineral inhibitor starch are added in the flotation, the separation of titanium and phosphorus is effectively realized, favorable conditions are created for obtaining qualified titanium concentrate and phosphorus concentrate through subsequent titanium flotation and phosphorus flotation, and the titanium and phosphorus separation flotation is also favorable for further reducing equipment investment and energy consumption. Then the concentrate after titanium-phosphorus separation and flotation is treated by a titanium ore dressing process to obtain the concentrate with the yield of 10.96 percent and TiO245.0% of P2O50.05%, 22.6% Fe, 0.45% MgO, TiO2The recovery rate of (D) was 58.0%, P2O5The recovery rate of the titanium concentrate is 0.24 percent, the recovery rate of the Fe is 18.34 percent, and the recovery rate of the MgO is 1.41 percent. TiO 22Has good grade and recovery rate, low content of magnesium oxide and P2O5The content is low, the indexes of the titanium concentrate are very good, and the titanium concentrate is high-quality titanium concentrate. The tailings after the titanium-phosphorus separation and flotation are subjected to phosphorus flotation, so that the yield is 3.51 percent, and TiO is obtained2Content of 0.7%, P2O538.0% of (A), 1.3% of Fe, 0.4% of MgO, TiO2The recovery rate of (A) was 0.29%, P2O5The recovery rate of the phosphate concentrate is 58 percent, the recovery rate of the Fe is 0.34 percent, and the recovery rate of the MgO is 0.4 percent. P2O5The grade and the recovery rate of the phosphate concentrate are good, the impurity content is low, the comprehensive utilization rate of resources is increased, and the economic benefit of a plant selection is increased.
As shown in fig. 2, the mixed pre-flotation process of the two-product beneficiation process of apatite-ilmenite comprises a mixed pre-coarse flotation process S1101, a mixed pre-fine flotation process S1102 and three times of mixed pre-sweeping flotation processes, wherein the mixed pre-flotation process S1100 is reverse flotation; feeding overflow products of the cyclone S1003 into a mixed pre-rough flotation S1101, and adding 120g/t of feeding ethylenediamine collecting agent and 20g/t of feeding foaming agent methyl isobutyl carbinol into the mixed pre-rough flotation S1101; feeding the underflow concentrate of the mixed pre-rough flotation S1101 into the mixed pre-fine flotation S1102, and adding 80g/t of ore feeding ethylenediamine collecting agent into the mixed pre-fine flotation S1102And 15g/t of feeding foaming agent methyl isobutyl carbinol, the concentrate yield of the mixed pre-fine flotation S1102 is 63.23 percent, and the TiO content is TiO2The content of P is 12.53 percent2O53.36%, 19.07% of Fe, 4.83% of MgO, TiO2Recovery rate of (2) was 93.20%, P2O5The recovery rate of the catalyst is 92.32 percent, the recovery rate of Fe is 89.30 percent, and the recovery rate of MgO is 87.20 percent; feeding the foam tailings of the mixed pre-rough flotation S1101 into a first mixed pre-scavenging flotation S1103, adding 40g/t of an ethylenediamine collecting agent and 10g/t of a foaming agent methyl isobutyl carbinol into the first mixed pre-scavenging flotation S1103, feeding the foam tailings of the first mixed pre-scavenging flotation S1103 into a second mixed pre-scavenging flotation S1104, feeding the foam tailings of the second mixed pre-scavenging flotation S1104 into a third mixed pre-scavenging flotation S1105, returning the underflow concentrate of the third mixed pre-scavenging flotation S1105 to the first mixed pre-scavenging flotation S1103, and returning the underflow concentrate of the first mixed pre-scavenging flotation S1103, the underflow concentrate of the second mixed pre-scavenging flotation S1104 and the foam tailings of the mixed pre-fine flotation S1102 to the mixed pre-rough flotation S1101; the concentrate of the mixed pre-fine flotation S1102 is the concentrate of the mixed pre-flotation S1100, and the tailings of the third mixed pre-sweep flotation S1105 is the tailings of the mixed pre-flotation S1100.
In the embodiment shown in fig. 2, the concentrate of the bulk pre-flotation adopts a cross-over return mode, namely, the concentrate of each stage of the sweep flotation returns to the upper stage of the sweep flotation, the ore pulp returned by each stage increases the time of the first stage of the sweep flotation, and the TiO of the bulk pre-flotation concentrate is powerfully ensured2And P2O5High yield of (2).
A titanium beneficiation subprocess flow of an alternative embodiment of the apatite ilmenite beneficiation process shown in fig. 3, wherein the titanium beneficiation subprocess S1200 comprises three stages of tables; the concentrate of the titanium-phosphorus separation flotation S1010 is fed into a first section of shaking table S1201, the middling reselected by the first section of shaking table S1201 is fed into a second section of shaking table S1202 for reselection, the middling reselected by the second section of shaking table S1202 is fed into a third section of shaking table S1203 for reselection, the concentrate reselected by the third section of shaking table is titanium concentrate, and the tailings reselected by the third section of shaking table is the tailings of the titanium concentration sub-process S1200, and the tailings are returned to the process tailings for tailing discarding.
In the embodiment shown in fig. 3, the table concentrator is adopted in the titanium concentration sub-process for gravity separation, the characteristic that the table concentrator has good selectivity on the metal minerals with large specific gravity of fine particles is fully utilized, the quality improvement effect is obvious, and good titanium concentrate indexes are obtained.
The phosphorus flotation process of the alternative embodiment of the apatite-ilmenite separation process shown in fig. 4 includes phosphorus rough flotation S1301, phosphorus sweeping flotation S1302 and two times of phosphorus fine flotation, wherein the phosphorus flotation S1300 is direct flotation; the tailings of the titanium phosphorus separation flotation S1010 are fed into phosphorus rough flotation S1301, apatite collector tall oil 150g/t feeding, gangue inhibitor water glass 80g/t feeding and foaming agent methoxy polypropylene glycol 20g/t are added into the phosphorus rough flotation S1301, the foam concentrate of the phosphorus rough flotation S1301 is fed into first phosphorus fine flotation S1303, the collector tall oil 90g/t feeding, gangue inhibitor water glass 50g/t feeding and foaming agent methoxy polypropylene glycol 15g/t are added into the first phosphorus fine flotation S1303, the concentrate of the first phosphorus fine flotation S1303 is fed into second phosphorus fine flotation S1304, the underflow tailings of the phosphorus rough flotation S1301 are fed into phosphorus sweep flotation S1302, the foaming agent methoxy polypropylene glycol 10g/t is added into the phosphorus flotation S1302, the underflow tailings of the second phosphorus fine flotation S1304 are returned into the first phosphorus fine flotation S1303, the underflow tailings of the first phosphorus fine flotation S1303 and the foam concentrate of the phosphorus sweep flotation S1302 are returned into the phosphorus rough flotation S1301, the froth concentrate of the second phosphorus fine flotation S1304 is the concentrate of the phosphorus flotation S1300, namely the phosphorus concentrate; the tailings of the phosphorus scavenging flotation S1302 are the tailings of the phosphorus flotation S1300, and are returned to the process tailings for discarding the tailings.
The above-mentioned 'feeding per ton' means the weight of the ore fed to the process, and is the same as the 'feeding per ton'.
The present invention is capable of other embodiments, and various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (9)
1. An apatite ilmenite two-product beneficiation process comprises three crushing procedures, and is characterized in that: the method also comprises a first-stage ball milling and cyclone closed circuit, a mixed pre-flotation, a second-stage ball milling and second-stage cyclone closed circuit, a weak magnetic separation, a strong magnetic separation, a magnesium removal rough flotation, a magnesium removal fine flotation, a titanium phosphorus separation flotation, a titanium ore dressing sub-process and a phosphorus flotation; the mixed pre-flotation comprises mixed pre-rough flotation, mixed pre-fine flotation and third mixed pre-sweeping flotation, and the mixed pre-flotation is reverse flotation;
after the raw ore is subjected to three-stage crushing procedures, feeding a crushed product with the granularity of 0-12mm into a first-stage ball mill in a closed circuit of a first-stage ball mill and a cyclone, feeding the product after the first-stage ball mill grinds ore into the cyclone, returning settled sand of the cyclone to the first-stage ball mill to form a closed circuit, and feeding the granularity P of the cyclone into a second-stage ball mill to form a second-stage ball mill80Feeding overflow products of 60-70 mu m into mixed pre-rough flotation in mixed pre-flotation, feeding underflow concentrate of the mixed pre-rough flotation into the mixed pre-fine flotation, feeding foam tailings of the mixed pre-rough flotation into first mixed pre-sweep flotation, feeding foam tailings of the first mixed pre-sweep flotation into second mixed pre-sweep flotation, feeding foam tailings of the second mixed pre-sweep flotation into third mixed pre-sweep flotation, feeding underflow concentrate of the third mixed pre-sweep flotation back to the first mixed pre-sweep flotation, and feeding underflow concentrate of the first mixed pre-sweep flotation, underflow concentrate of the second mixed pre-sweep flotation and foam tailings of the mixed pre-fine flotation back to the mixed pre-rough flotation;
the tailings of the third mixed pre-scavenging flotation form tailings of mixed pre-flotation, the concentrates of the mixed pre-fine flotation form concentrates of the mixed pre-flotation, the concentrates of the mixed pre-flotation are fed into a second-stage cyclone in a closed circuit of a second-stage ball mill and a second-stage cyclone, settled sand of the second-stage cyclone is fed into the second-stage ball mill, products after the second-stage ball mill grinding are returned to the second-stage cyclone to form a closed circuit, and a P-type cyclone of the second-stage cyclone is connected with a P-type cyclone80Feeding overflow of 30-40 mu m into low intensity magnetic separation;
the concentrate subjected to the low-intensity magnetic separation is subjected to high-intensity magnetic separation, the concentrate subjected to the high-intensity magnetic separation is subjected to the magnesium removal rough flotation, the underflow concentrate subjected to the magnesium removal rough flotation is subjected to the magnesium removal fine flotation, and the underflow concentrate subjected to the magnesium removal fine flotation is subjected to the titanium-phosphorus separation flotation;
feeding the concentrate subjected to the titanium-phosphorus separation flotation into a titanium ore concentration sub-process, wherein the concentrate of the titanium ore concentration sub-process is titanium concentrate;
the tailings of the titanium-phosphorus separation flotation are subjected to phosphorus flotation, and the concentrate of the phosphorus flotation is phosphorus concentrate;
the tailings of the mixed pre-flotation, the tailings of the low-intensity magnetic separation, the tailings of the high-intensity magnetic separation, the tailings of the magnesium removal rough flotation, the tailings of the magnesium removal fine flotation, the tailings of the titanium beneficiation sub process and the tailings of the phosphorus flotation jointly form process tailings discarding tailings.
2. The apatite ilmenite beneficiation process according to claim 1, characterized by: the titanium ore dressing sub-process comprises three sections of shaking tables; and feeding the concentrate subjected to titanium-phosphorus separation and flotation into a first-stage table concentrator, feeding the middling subjected to gravity separation by the first-stage table concentrator into a second-stage table concentrator for gravity separation, feeding the middling subjected to gravity separation by the second-stage table concentrator into a third-stage table concentrator for gravity separation, wherein the concentrate subjected to gravity separation by the third-stage table concentrator is the concentrate of the titanium beneficiation sub-process, and the tailings subjected to gravity separation by the third-stage table concentrator are the tailings of the titanium.
3. The apatite ilmenite beneficiation process according to claim 1, characterized by: the phosphorus flotation comprises phosphorus rough flotation, phosphorus scavenging flotation and twice phosphorus fine flotation, and the phosphorus flotation is direct flotation; the tailings of the titanium phosphorus separation flotation are fed into phosphorus rough flotation, the foam concentrate of the phosphorus rough flotation is fed into first phosphorus fine flotation, the concentrate of the first phosphorus fine flotation is fed into second phosphorus fine flotation, the underflow tailings of the phosphorus rough flotation are fed into phosphorus scavenging flotation, the underflow tailings of the second phosphorus fine flotation return to the first phosphorus fine flotation, the underflow tailings of the first phosphorus fine flotation and the foam concentrate of the phosphorus scavenging flotation return to the phosphorus rough flotation, the foam concentrate of the second phosphorus fine flotation is the concentrate of the phosphorus flotation, and the tailings of the phosphorus scavenging flotation is the tailings of the phosphorus flotation.
4. The apatite ilmenite beneficiation process according to claim 1, characterized by: the magnetic field intensity of the low-intensity magnetic separation is 1800-2200GS, and the magnetic field intensity of the high-intensity magnetic separation is 7200-8800 GS.
5. The apatite ilmenite beneficiation process according to claim 1, characterized by: 108-132g of ethylenediamine and 18-22g of methyl isobutyl carbinol are added into each ton of ore in the mixed pre-rough flotation; adding 72-88g of ethylenediamine and 13-16g of methyl isobutyl carbinol into each ton of ore in the mixed pre-fine flotation; and adding 36-45g of ethylenediamine and 9-11g of methyl isobutyl carbinol into each ton of ore in the first mixed pre-sweeping flotation.
6. The apatite ilmenite beneficiation process according to claim 1, characterized by: 220g of sulfuric acid-containing acid, 55-66g of ether amine and 13-16g of 2# oil are added into each ton of ore in the magnesium-removing rough flotation; 27-33g of ether amine is added into each ton of feeding ore in the demagging fine flotation.
7. The apatite ilmenite beneficiation process according to claim 1, characterized by: and in the titanium-phosphorus separation flotation, 135-165g of tall oil, 90-110g of starch and 18-22g of methoxypolypropylene glycol are added into each ton of ore feeding.
8. The apatite ilmenite beneficiation process of claim 3, wherein: in the phosphorus rough flotation, 165g of tall oil 135-; in the first phosphorus fine flotation, 81-99g of tall oil, 45-55g of water glass and 13-16g of methoxy polypropylene glycol are added into each ton of ore feeding, and 9-11g of methoxy polypropylene glycol is added into each ton of ore feeding in the phosphorus scavenging flotation.
9. The apatitic ilmenite beneficiation process according to any one of claims 1 to 8, characterized by: the main useful minerals of the raw ore comprise ilmenite and apatite, and the gangue minerals of the raw ore mainly comprise pyroxene, mica, quartz, magnetite and false hematite; TiO 22Content of (2) is 8.5%, P2O5The raw ore with the content of 2.3%, the iron grade of 13.5% and the content of MgO of 3.5% is treated by the two-product ore dressing process of apatite ilmenite according to any one of claims 1 to 8 to obtain TiO245.0% of P2O5Of (1) contains0.05% of the amount, 22.6% of Fe, 0.45% of MgO, TiO2The recovery rate of (D) was 58.0%, P2O5With a recovery rate of 0.24%, a recovery rate of 18.34% of Fe and a recovery rate of 1.41% of MgO, and obtaining TiO2Content of 0.7%, P2O538.0% of (A), 1.3% of Fe, 0.4% of MgO, TiO2The recovery rate of (A) was 0.29%, P2O5The recovery rate of the phosphate concentrate is 58 percent, the recovery rate of the Fe is 0.34 percent, and the recovery rate of the MgO is 0.4 percent.
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