CN113304888B - Speed-division flotation process for sphalerite - Google Patents
Speed-division flotation process for sphalerite Download PDFInfo
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- CN113304888B CN113304888B CN202110576866.7A CN202110576866A CN113304888B CN 113304888 B CN113304888 B CN 113304888B CN 202110576866 A CN202110576866 A CN 202110576866A CN 113304888 B CN113304888 B CN 113304888B
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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
- B03D1/001—Flotation agents
- B03D1/018—Mixtures of inorganic and organic compounds
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
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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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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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
- B03D2203/00—Specified materials treated by the flotation agents; specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a speed-division flotation process of sphalerite, and belongs to the technical field of lead-zinc ore flotation. The invention comprises the following steps: the primary roughing is divided into two sections (a roughing first section and a roughing second section), wherein the roughing first section is zinc refining second operation for zinc blende with good floatability, less entrainment and higher grade, the roughing second section is zinc refining first operation for zinc blende with poor floatability and more intergrowth, and zinc refining first middling is reground and returns to the zinc roughing second section after the dissociation degree is improved. Aiming at the condition that the fine particle sulfur-oxygen mixed complex continuous lead-zinc ore contains a large amount of dolomite, calcite and other light minerals to influence the grade of zinc concentrate, the invention adopts a process different from the traditional beneficiation flow, can effectively reduce the impurities in the concentrate, improve the grade of the zinc concentrate, reduce the flow circulation and reduce the equipment load, and obtain better flotation indexes.
Description
Technical Field
The invention relates to the technical field of complex sulfur-oxygen mixed lead-zinc ore flotation, in particular to a zinc blende speed-division flotation process.
Background
In the flotation process of lead-zinc ores, the lead-zinc ores containing light easy-to-float gangue and difficult-to-float lead-zinc ores have the prominent problems of serious easy-to-float slime inclusion phenomenon, large middling circulation quantity, poor flotation stability, low zinc concentrate grade and the like in the conventional lead-zinc flotation process of using lead first and zinc later due to the high content of secondary slime, large specific surface area of slime and the like.
At present, for the mineral separation process of lead-zinc ore containing high-argillaceous micro-fine particles, in order to eliminate the interference of light easy-to-float gangue such as dolomite and calcite, the following two treatment methods are often adopted:
(1) The floatability of the gangue is inhibited by using high molecular inhibitors such as Guergan, dextrin and the like, and the interference on the zinc flotation is reduced (such as Li national Ming's process and mechanism research for inhibiting lead floating zinc and separating lead-zinc bulk concentrate; such as a beneficiation method of high-sulfur lead-zinc ore disclosed in Chinese patent CN 202010620631.9), but the cost of the reagent is high, and the reagent residue enters beneficiation wastewater, such as the recycling of the beneficiation wastewater easily interferes with the lead flotation;
(2) The flow structure is changed, for example, the middlings with higher argillaceous quality are removed in advance, and released part of the middlings are conveyed to the tailings (from Zhenghua 'research on beneficiation tests of low-grade sulfur-oxygen mixed lead-zinc ores by selective flocculation flotation method'), but the method easily causes large metal loss in the tailings, and is not beneficial to improvement of the overall economic benefit.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a zinc blende differential flotation process, which can eliminate the interference of light easy-to-float gangue and improve the zinc sulfide flotation efficiency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a zinc blende differential flotation process comprises the following steps:
(1) Preparing ores, grinding the ores, finishing lead sorting operation, and enabling obtained lead flotation tailings to enter zinc sorting operation;
(2) 1, first zinc roughing: adding a regulator lime, an activator copper sulfate and a collecting agent butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation to obtain zinc roughing concentrates and zinc roughing tailings;
(3) And B, roughing zinc: performing secondary flotation on the zinc roughing tailings obtained in the step (2), adding an activating agent copper sulfate and a collecting agent butyl xanthate for performing flotation to obtain zinc roughing secondary concentrate and zinc roughing secondary tailings;
(4) Zinc scavenging: performing scavenging twice on the second zinc rougher tailings obtained in the step (3) to obtain final tailings; returning the first scavenging concentrate to the second zinc roughing, and returning the second scavenging middling to the first scavenging; wherein, activating agent copper sulfate and collecting agent butyl xanthate are added in the first scavenging, and collecting agent butyl xanthate is added in the second scavenging;
(5) Carrying out four-time concentration on the second zinc roughing concentrate obtained in the step (3) to obtain zinc concentrate; wherein, the middlings in the first concentration are reground and then returned to the zinc roughing II, the middlings in the second concentrate are returned to the first concentration, the middlings in the third concentrate are returned to the second concentration, and the middlings in the fourth concentrate are returned to the third concentration; adding a collecting agent butyl xanthate in the first concentration, adding an activating agent copper sulfate and the collecting agent butyl xanthate in the second concentration, and adding a regulator lime in the third concentration and the fourth concentration;
(6) And (3) directly feeding the zinc rough concentration obtained in the step (2) into the second fine concentration in the step (5), and obtaining the zinc concentrate after three fine concentrations.
The invention divides the zinc roughing into two sections: the zinc roughing separation method comprises a first zinc roughing separation step and a second zinc roughing separation step, wherein the first zinc roughing separation step is that zinc blende which is good in floatability, few in entrainment and high in grade enters a second zinc refining operation, the second zinc roughing separation step is that the floatability is poor, the zinc blende which is more in intergrowth enters the first zinc refining operation, the first zinc refining middling is reground, and the second zinc roughing separation step is returned after the dissociation degree is improved.
Further, in the step (2), the dosage of the regulator lime used for zinc roughing is 500-800g/t, the dosage of the activator copper sulfate is 200-250g/t, and the dosage of the collector butyl xanthate is 60-100g/t.
Further, in the step (3), the dosage of the activator copper sulfate added in the second zinc roughing step is 50-100g/t, and the dosage of the collector butyl xanthate added in the second zinc roughing step is 15-20g/t.
Further, in the step (4), 30-50g/t of activating agent copper sulfate and 12-15g/t of collecting agent butyl xanthate are added in the first scavenging; and adding 5-10g/t of collecting agent butyl xanthate in the second scavenging.
Further, in the step (5), 5-10g/t of collecting agent butyl xanthate is added in the first concentration, 20-40g/t of activating agent copper sulfate and 5-10g/t of collecting agent butyl xanthate are added in the second concentration, and the dosage of adding adjusting agent lime in the third concentration and the fourth concentration is 500-800g/t.
Furthermore, the content of light minerals in the raw ore subjected to flotation treatment reaches above 55 percent, and the light minerals comprise dolomite and calcite.
Furthermore, the concentration of the concentration operation is reduced by more than 10%.
The invention has the beneficial effects that:
firstly, aiming at the characteristics of large circulation amount of zinc separation operation containing a large amount of light gangue minerals, the invention divides the original rough separation into two parts, and utilizes a small amount of medicament to directly float zinc blende with better dissociation degree and high grade out to enter the flow for the second fine separation, thereby reducing the phenomenon of carrying a large amount of light minerals, reducing the fine separation times and circulation amount and improving the grade of foams entering the fine separation.
Secondly, floating the sphalerite which has poor dissociation degree and low grade and can cause a large amount of circulation quantity by using zinc roughing II, and then carrying out primary concentration in the process, and obtaining zinc concentrate after sequential flotation.
And thirdly, the first concentration is used as scavenging operation of the second concentration, the buffer effect of middlings is achieved, and tailings of the middlings are ground again, added with chemicals, mixed with pulp, lifted in dissociation degree and returned to the second zinc roughing operation. Through the treatment, the ores are efficiently and stably sorted, the circulation quantity is obviously reduced, the concentration of the zinc concentration can be reduced to about 40%, and the indexes are good.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1
In some complex sulfur-oxygen mixed lead-zinc ore in Guangxi, light gangue minerals such as dolomite, calcite and the like with the mineral content of about 60 percent are contained; meanwhile, the useful minerals are distributed in micro-fine particles, so the embedding characteristics and the symbiotic relationship are complex; after ore grinding with the ore grinding fineness of-0.074 mm and the grain size level accounting for 70-75% of the total ore content is carried out, a large amount of intergrowths still exist. If the ore grinding fineness is simply improved, the accelerated argillization of the light gangue minerals can be caused, so that the dosage of a flotation reagent is increased, the index is deteriorated, natural resources are wasted, and the economic benefit of enterprises is not facilitated.
At present, after the lead selection operation is finished, the zinc selection process flow is a primary, secondary and secondary sweeping four-fine sequence return flow. The lead-zinc ore still contains a large amount of intergrowths after the lead dressing operation is finished, and the traditional high-alkali process cannot be adopted in a medicament system, so that the large amount of intergrowths float, the circulating concentration of the flotation operation is high, particularly the concentration of the fine operation can reach more than 55 percent, and the dressing effect is completely lost. At this concentration, a large amount of light minerals have low specific gravity and high foam concentration, and lack of secondary enrichment selection, resulting in reduced foam grade. After the circulation is repeated, the flotation zinc concentrate has poor grade, low recovery rate and poor stability.
The selected ore in the embodiment is lead-zinc sulfide ore which is complex in fine-particle sulfur-oxygen mixture and difficult to select, such as a large amount of dolomite, calcite and the like, the raw ore contains 0.9% of lead, 2.95% of zinc, 7.2% of sulfur and 56% of dolomite; the metal minerals of the ore are mainly pyrite, sphalerite, galena, a small amount of limonite, arsenopyrite, galena, and trace tetrahedrite, chalcocite, chalcopyrite, chalcocite, bornite, magnetite, siderite, arsenopyrite, and the like. The gangue minerals are mainly dolomite, and then barite, a small amount of quartz, garnet, calcite, feldspar, gypsum, mica, trace apatite, kaolinite, tourmaline and the like. The main metal mineral has fine embedded particle size, complex relation and low monomer dissociation degree.
This example provides a zinc blende partial velocity flotation process, which treats the zinc blende according to the beneficiation process shown in fig. 1, and includes the following steps:
(1) The preparation of ore, grinding and lead sorting are completed, and lead tailings with the zinc recovery rate of about 98 percent enter the zinc sorting operation.
(2) And (2) zinc roughing, namely adding a regulator lime, an activator copper sulfate and a collector butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation. Obtaining zinc roughing concentrate and zinc roughing tailings. The dosage of the regulator lime used for zinc roughing is 500g/t, the dosage of the activator copper sulfate is 250g/t, and the dosage of the collector butyl xanthate is 100g/t.
(3) And (3) performing zinc roughing on the second zinc rougher tailings obtained in the step (2) by performing flotation again to obtain second zinc rougher concentrate and second zinc rougher tailings. The dosage of the activator copper sulfate added in the second rough concentration is 100g/t, and the dosage of the collector butyl xanthate is 20g/t.
(4) And (4) zinc scavenging, namely performing scavenging twice on the second zinc roughing tailings obtained in the step (3) to obtain final tailings. The first scavenging concentrate returns to the zinc roughing II, and the second scavenging middlings return to the first scavenging. Wherein 50g/t of activator copper sulfate and 15g/t of collector butyl xanthate are added in the first scavenging, and 10g/t of collector butyl xanthate is added in the second scavenging.
(5) And (4) carrying out four-time concentration on the second zinc rough concentration obtained in the step (3) to obtain zinc concentrate. And returning the middlings from the first concentration to the second zinc roughing after regrinding treatment. And returning the middlings in the second concentrate to the first concentration, returning the middlings in the third concentrate to the second concentration, and returning the middlings in the fourth concentrate to the third concentration. 10g/t of collecting agent butyl xanthate is added in the first selection, 40g/t of activating agent copper sulfate is added in the second selection, and 10g/t of collecting agent butyl xanthate is added in the second selection. The dosage of lime added with the regulator for the third concentration and the fourth concentration is 500g/t.
(6) And (3) directly feeding the zinc rough concentration obtained in the step (2) into the second fine concentration in the step (5), and obtaining the zinc concentrate after three fine concentrations.
The flotation process of the embodiment obtains lead concentrate grade of 55.60%, lead concentrate recovery rate of 56.01%, zinc concentrate grade of 47.16% and zinc recovery rate of 88.73%; concentration one operation concentration is 45%.
The ore is treated by adopting the traditional preferential flotation sequence return process, so that the grade of lead concentrate is 54.26 percent, the recovery rate of lead concentrate is 56.04 percent, the grade of zinc concentrate is 45.89 percent, and the recovery rate of zinc is 86.7 percent; concentration one job concentration was 57%.
Example 2
The selected ore in the embodiment is lead-zinc sulfide ore which is complex in fine-particle sulfur-oxygen mixture and difficult to select, such as a large amount of dolomite, calcite and the like, the raw ore contains 0.74% of lead, 2.81% of zinc, 6.9% of sulfur and 62% of dolomite; the metal minerals of the ore are mainly pyrite, sphalerite, galena, arsenopyrite, galena and trace tetrahedrite, bornite, magnetite, siderite, arsenopyrite and arsenopyrite. The gangue minerals are mainly dolomite, and then barite, a small amount of quartz, garnet, calcite, feldspar, gypsum, mica, and trace apatite, kaolinite, tourmaline and the like. The main metal mineral has fine embedded particle size, complex relation and low monomer dissociation degree.
This example provides a zinc blende differential flotation process, which is performed according to the beneficiation process shown in fig. 1, and includes the following steps:
(1) The preparation of ore, grinding and lead sorting are completed, and lead tailings with the zinc recovery rate of about 98 percent enter the zinc sorting operation.
(2) And (2) zinc roughing, namely adding a regulator lime, an activator copper sulfate and a collector butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation. Obtaining zinc roughing concentrate and zinc roughing tailings. The dosage of the regulator lime used for zinc roughing is 700g/t, the dosage of the activator copper sulfate is 220g/t, and the dosage of the collector butyl xanthate is 80g/t.
(3) And (2) performing zinc roughing, namely performing secondary flotation on the zinc roughing tailings obtained in the step (2) to obtain zinc roughing second concentrate and zinc roughing second tailings. The dosage of the activator copper sulfate added in the second rough concentration is 70g/t, and the dosage of the collecting agent butyl xanthate is 15g/t.
(4) And (4) zinc scavenging, namely performing scavenging twice on the second zinc roughing tailings obtained in the step (3) to obtain final tailings. The first scavenging concentrate returns to the zinc roughing II, and the second scavenging middlings return to the first scavenging. Wherein 30g/t of activator copper sulfate and 12g/t of collecting agent butyl xanthate are added in the first scavenging, and 5g/t of collecting agent butyl xanthate is added in the second scavenging.
(5) And (4) carrying out four times of concentration on the second concentrate of the zinc rough concentration obtained in the step (3) to obtain zinc concentrate. And returning the middlings from the first concentration to the second zinc roughing after regrinding treatment. And returning the second concentrate middlings to the first concentration, returning the third concentrate middlings to the second concentration, and returning the fourth concentrate middlings to the third concentration. 5g/t of collecting agent butyl xanthate is added in the first selection, 20g/t of activating agent copper sulfate and 7g/t of collecting agent butyl xanthate are added in the second selection. The dosage of lime added into the third concentration and the fourth concentration is 800g/t.
(6) And (3) directly feeding the zinc rough concentration obtained in the step (2) into the second fine concentration in the step (5), and obtaining the zinc concentrate after three fine concentrations.
The flotation process of the embodiment obtains lead concentrate with grade of 51.78%, lead concentrate recovery rate of 49.30%, zinc concentrate with grade of 47.02% and zinc recovery rate of 87.30%; concentration one operation concentration is 40%.
The ore is treated by adopting the traditional preferential flotation sequence return process, so that 53.18 percent of lead concentrate grade, 48.69 percent of lead concentrate recovery rate, 45 percent of zinc concentrate grade and 85.09 percent of zinc recovery rate are obtained; concentration one job concentration is 56%.
Example 3
The selected ore in the embodiment is lead-zinc sulfide ore which is complex in fine-particle sulfur-oxygen mixture and difficult to select, such as a large amount of dolomite, calcite and the like, the raw ore contains 0.81% of lead, 2.70% of zinc, 6.9% of sulfur and 59% of dolomite; the metal minerals of the ore are mainly pyrite, sphalerite, galena, arsenopyrite, galena and trace tetrahedrite, bornite, magnetite, siderite, arsenopyrite and arsenopyrite. The gangue minerals are mainly dolomite, and then barite, a small amount of quartz, garnet, calcite, feldspar, gypsum, mica, trace apatite, kaolinite, tourmaline and the like. The main metal mineral has fine embedded particle size, complex relation and low monomer dissociation degree.
The embodiment provides a zinc blende differential flotation process, which treats the zinc blende according to the beneficiation process shown in the attached drawing 1, and comprises the following specific steps:
(1) The preparation of ore, grinding and lead sorting are completed, and lead tailings with the zinc recovery rate of about 98 percent enter the zinc sorting operation.
(2) 1, first zinc roughing: adding a regulator lime, an activator copper sulfate and a collecting agent butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation to obtain zinc roughing concentrates and zinc roughing tailings; the dosage of the regulator lime used for zinc roughing is 800g/t, the dosage of the activator copper sulfate is 200g/t, and the dosage of the collector butyl xanthate is 60g/t.
(3) And B, roughing zinc: performing secondary flotation on the zinc roughing tailings obtained in the step (2), adding an activating agent copper sulfate and a collecting agent butyl xanthate for performing flotation to obtain zinc roughing secondary concentrate and zinc roughing secondary tailings; the dosage of the activator copper sulfate added in the second zinc roughing step is 50g/t, and the dosage of the collector butyl xanthate added in the second zinc roughing step is 17g/t.
(4) Zinc scavenging: performing scavenging twice on the second zinc rougher tailings obtained in the step (3) to obtain final tailings; returning the first scavenging concentrate to zinc roughing II, and returning the second scavenging middling to the first scavenging; wherein 40g/t of activator copper sulfate and 13g/t of collecting agent butyl xanthate are added in the first scavenging; and adding 7g/t of collecting agent butyl xanthate in the second scavenging.
(5) Carrying out four-time concentration on the second zinc roughing concentrate obtained in the step (3) to obtain zinc concentrate; wherein, the middlings in the first concentration are reground and then returned to the zinc roughing II, the middlings in the second concentrate are returned to the first concentration, the middlings in the third concentrate are returned to the second concentration, and the middlings in the fourth concentrate are returned to the third concentration; 8g/t of collecting agent butyl xanthate is added in the first concentration, 30g/t of activating agent copper sulfate and 5g/t of collecting agent butyl xanthate are added in the second concentration, and the dosage of lime added in the third concentration and the fourth concentration is 600g/t.
(6) And (3) directly feeding the zinc rough concentration obtained in the step (2) into the second fine concentration in the step (5), and obtaining the zinc concentrate after three fine concentrations.
The flotation process of the embodiment obtains lead concentrate grade of 54.62%, lead concentrate recovery rate of 43.11%, zinc concentrate grade of 47.13% and zinc recovery rate of 88.07%; concentration one job concentration was 43%.
The ore is treated by adopting the traditional preferential flotation sequence return process, so that 53.75 percent of lead concentrate grade, 42.70 percent of lead concentrate recovery rate, 45.11 percent of zinc concentrate grade and 86.08 percent of zinc recovery rate are obtained; concentration one operation concentration is 57%.
Example 4
The selected ore in the embodiment is lead-zinc sulfide ore which is complex in fine-particle sulfur-oxygen mixture and difficult to select, such as a large amount of dolomite, calcite and the like, and the raw ore contains 0.88% of lead, 2.90% of zinc, 7.1% of sulfur and 61% of dolomite.
This example provides a zinc blende differential flotation process, which is performed according to the beneficiation process shown in fig. 1, and includes the following steps:
(1) Preparing ores, grinding the ores, finishing lead sorting operation, and enabling obtained lead flotation tailings to enter zinc sorting operation;
(2) 1, first zinc roughing: adding a regulator lime, an activator copper sulfate and a collecting agent butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation to obtain zinc roughing concentrates and zinc roughing tailings; the dosage of the regulator lime used for zinc roughing is 700g/t, the dosage of the activator copper sulfate is 210g/t, and the dosage of the collector butyl xanthate is 80g/t.
(3) And B, roughing zinc: performing flotation again on the zinc roughing tailings obtained in the step (2), adding an activating agent copper sulfate and a collecting agent butyl xanthate for flotation, and obtaining zinc roughing secondary concentrate and zinc roughing secondary tailings; the dosage of the activator copper sulfate added in the second zinc roughing step is 80g/t, and the dosage of the collector butyl xanthate added in the second zinc roughing step is 16g/t.
(4) Zinc scavenging: performing scavenging twice on the second zinc roughing tailings obtained in the step (3) to obtain final tailings; returning the first scavenging concentrate to zinc roughing II, and returning the second scavenging middling to the first scavenging; wherein 35g/t of activating agent copper sulfate and 14g/t of collecting agent butyl xanthate are added in the first scavenging; and adding 6g/t of butyl xanthate serving as a collecting agent in the second scavenging.
(5) Carrying out four-time concentration on the second zinc roughing concentrate obtained in the step (3) to obtain zinc concentrate; wherein, the middlings in the first concentration are reground and then returned to the zinc roughing II, the middlings in the second concentrate are returned to the first concentration, the middlings in the third concentrate are returned to the second concentration, and the middlings in the fourth concentrate are returned to the third concentration; 6g/t of the collector butyl xanthate is added in the first concentration, 25g/t of the activator copper sulfate and 8g/t of the collector butyl xanthate are added in the second concentration, and the dosage of the regulator lime added in the third concentration and the fourth concentration is 550g/t.
(6) And (3) directly feeding the zinc rough concentration obtained in the step (2) into the second fine concentration in the step (5), and obtaining the zinc concentrate after three fine concentrations.
The flotation process of the embodiment obtains lead concentrate grade of 55.41%, lead concentrate recovery rate of 55.96%, zinc concentrate grade of 47.04%, and zinc recovery rate of 88.00%; concentration one job concentration was 46%.
The ore is treated by adopting the traditional preferential flotation sequence return process, so that the grade of lead concentrate is 54.20 percent, the recovery rate of lead concentrate is 55.03 percent, the grade of zinc concentrate is 45.12 percent, and the recovery rate of zinc is 86.20 percent; concentration one operation concentration is 55%.
Comparative example 1
A sphalerite flotation process substantially as in example 1, except that: directly carrying out primary roughing, and specifically comprising the following steps:
(1) The preparation of ore, grinding and lead sorting are completed, and lead tailings with the zinc recovery rate of about 98 percent enter the zinc sorting operation.
(2) And (2) zinc roughing, namely adding a regulator lime, an activator copper sulfate and a collector butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation. Obtaining zinc roughing concentrate and zinc roughing tailings. The dosage of the regulator lime used for zinc roughing is 500g/t, the dosage of the activator copper sulfate is 330g/t, and the dosage of the collector butyl xanthate is 120g/t.
(3) And (3) zinc scavenging, namely performing scavenging twice on the second zinc roughing tailings obtained in the step (2) to obtain final tailings. The first scavenging concentrate returns to the zinc roughing II, and the second scavenging middlings return to the first scavenging. Wherein 50g/t of activator copper sulfate and 15g/t of collector butyl xanthate are added in the first scavenging, and 10g/t of collector butyl xanthate is added in the second scavenging.
(4) And (3) carrying out four times of concentration on the zinc rough concentrate obtained in the step (2) to obtain zinc concentrate. And returning the middlings from the first concentration to the zinc roughing after regrinding. And returning the second concentrate middlings to the first concentration, returning the third concentrate middlings to the second concentration, and returning the fourth concentrate middlings to the third concentration. 10g/t of collecting agent butyl xanthate is added in the first selection, 40g/t of activating agent copper sulfate is added in the second selection, and 10g/t of collecting agent butyl xanthate is added in the second selection. The dosage of lime added into the third concentration and the fourth concentration is 500g/t.
The flotation process of the comparative example is used for obtaining lead concentrate with grade of 54.60 percent, lead concentrate recovery rate of 55.8 percent, zinc concentrate with grade of 45.16 percent and zinc recovery rate of 86.73 percent; concentration one operation concentration is 48%.
Comparative example 2
A zinc blende flotation process substantially the same as in example 1, except that: the first-time concentration middling is not subjected to regrinding treatment and returns to the first zinc roughing step, and the method comprises the following specific steps:
(1) Ore preparation, ore grinding and lead sorting are completed, and lead tailings with the zinc recovery rate of about 98 percent enter the zinc sorting operation.
(2) And (2) zinc roughing, namely adding a regulator lime, an activator copper sulfate and a collector butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation. Obtaining zinc roughing concentrate and zinc roughing tailings. The dosage of the regulator lime used for zinc roughing is 500g/t, the dosage of the activator copper sulfate is 250g/t, and the dosage of the collector butyl xanthate is 100g/t.
(3) And (2) performing zinc roughing, namely performing secondary flotation on the zinc roughing tailings obtained in the step (2) to obtain zinc roughing second concentrate and zinc roughing second tailings. The dosage of activating agent copper sulfate added in the second rough concentration is 100g/t, and the dosage of collecting agent butyl xanthate is 20g/t.
(4) And (4) zinc scavenging, namely performing scavenging twice on the second zinc roughing tailings obtained in the step (3) to obtain final tailings. The first scavenging concentrate returns to the zinc roughing II, and the second scavenging middlings return to the first scavenging. Wherein 50g/t of activator copper sulfate and 15g/t of collecting agent butyl xanthate are added in the first scavenging, and 10g/t of collecting agent butyl xanthate is added in the second scavenging.
(5) And (4) carrying out four-time concentration on the second zinc rough concentration obtained in the step (3) to obtain zinc concentrate. Returning to the first zinc roughing after the first fine separation. And returning the second concentrate middlings to the first concentration, returning the third concentrate middlings to the second concentration, and returning the fourth concentrate middlings to the third concentration. 10g/t of collecting agent butyl xanthate is added in the first concentration, 40g/t of activating agent copper sulfate is added in the second concentration, and 10g/t of collecting agent butyl xanthate is added in the second concentration. The dosage of lime added with the regulator for the third concentration and the fourth concentration is 500g/t.
(6) And (3) directly feeding the zinc rough concentration obtained in the step (2) into the second fine concentration in the step (5), and obtaining the zinc concentrate after three fine concentrations.
The flotation process of the comparative example is used for obtaining lead concentrate with grade of 56.60%, lead concentrate recovery rate of 54.01%, zinc concentrate with grade of 46.86% and zinc recovery rate of 85.73%; concentration one operation concentration is 55%.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. A zinc blende speed-division flotation process is characterized by comprising the following steps:
(1) Preparing ores, grinding the ores, finishing lead sorting operation, and enabling obtained lead flotation tailings to enter zinc sorting operation;
(2) 1, first zinc roughing: adding a regulator lime, an activator copper sulfate and a collector butyl xanthate into the lead flotation tailings obtained in the step (1) to perform zinc roughing operation, so as to obtain zinc roughing concentrate and zinc roughing tailings;
(3) And B, roughing zinc: performing secondary flotation on the zinc roughing tailings obtained in the step (2), adding an activating agent copper sulfate and a collecting agent butyl xanthate for performing flotation to obtain zinc roughing secondary concentrate and zinc roughing secondary tailings;
(4) Zinc scavenging: performing scavenging twice on the second zinc roughing tailings obtained in the step (3) to obtain final tailings; returning the first scavenging concentrate to the second zinc roughing, and returning the second scavenging middling to the first scavenging; wherein, the activator copper sulfate and the collector butyl xanthate are added in the first scavenging, and the collector butyl xanthate is added in the second scavenging;
(5) Carrying out four-time concentration on the second zinc roughing concentrate obtained in the step (3) to obtain zinc concentrate; wherein, the middlings in the first concentration are reground and then returned to the zinc roughing II, the middlings in the second concentrate are returned to the first concentration, the middlings in the third concentrate are returned to the second concentration, and the middlings in the fourth concentrate are returned to the third concentration; adding a collecting agent butyl xanthate in the first concentration, adding an activating agent copper sulfate and the collecting agent butyl xanthate in the second concentration, and adding a regulator lime in the third concentration and the fourth concentration;
(6) Directly feeding the zinc rough concentration obtained in the step (2) into the second fine concentration in the step (5), and obtaining zinc concentrate after three fine concentrations;
the zinc blende differential flotation process divides zinc roughing into two sections: the method comprises the following steps of firstly, roughly selecting zinc and secondly, roughly selecting zinc, wherein the first roughly selecting zinc is zinc blende which has better floatability, less entrainment and higher grade and enters a second zinc refining operation, the second roughly selecting zinc is zinc blende which has poorer floatability and more intergrowths and enters the first zinc refining operation, regrinding the first zinc refined middlings, and returning to the second zinc roughly selecting after the dissociation degree is improved;
in the step (2), the dosage of the regulator lime used for zinc roughing is 500-800g/t, the dosage of the activator copper sulfate is 200-250g/t, and the dosage of the collector butyl xanthate is 60-100g/t;
in the step (3), the dosage of the activator copper sulfate added in the second zinc roughing step is 50-100g/t, and the dosage of the collector butyl xanthate added in the second zinc roughing step is 15-20g/t;
in the step (4), 30-50g/t of activating agent copper sulfate and 12-15g/t of collecting agent butyl xanthate are added in the first scavenging; adding a collecting agent butyl xanthate in the second scavenging at 5-10g/t;
in the step (5), 5-10g/t of collecting agent butyl xanthate is added in the first concentration, 20-40g/t of activating agent copper sulfate and 5-10g/t of collecting agent butyl xanthate are added in the second concentration, and the dosage of adding regulator lime is 500-800g/t in the third concentration and the fourth concentration;
the content of light minerals in the raw ore reaches more than 55 percent, and the light minerals comprise dolomite and calcite.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194887A (en) * | 1998-02-23 | 1998-10-07 | 南方冶金学院 | Selectively grading and regrinding process for middlings |
| CN101961682A (en) * | 2010-10-18 | 2011-02-02 | 白银有色集团股份有限公司 | Complex copper-lead ore beneficiation separation method adopting middling returning and regrinding technology |
| CN102806146A (en) * | 2012-07-27 | 2012-12-05 | 中国铝业股份有限公司 | Method for performing beneficiation and desilicification on bauxite |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269267B (en) * | 2016-09-29 | 2018-05-11 | 内蒙古东升庙矿业有限责任公司 | A kind of beneficiation method of lead zinc-silver polymetallic ore |
| CN107537695A (en) * | 2017-08-14 | 2018-01-05 | 内蒙古森泰企业咨询有限公司 | A kind of method for improving complex lead zinc ores metal recovery rate |
| CN112264197B (en) * | 2020-09-22 | 2022-11-11 | 铜陵有色金属集团股份有限公司 | Combined inhibitor for high-magnetic pyrite type copper-sulfur ore and beneficiation method thereof |
| AU2021101480A4 (en) * | 2021-03-23 | 2021-05-13 | Guangxi University | Method for Regulating Zinc Oxide Flotation foam |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194887A (en) * | 1998-02-23 | 1998-10-07 | 南方冶金学院 | Selectively grading and regrinding process for middlings |
| CN101961682A (en) * | 2010-10-18 | 2011-02-02 | 白银有色集团股份有限公司 | Complex copper-lead ore beneficiation separation method adopting middling returning and regrinding technology |
| CN102806146A (en) * | 2012-07-27 | 2012-12-05 | 中国铝业股份有限公司 | Method for performing beneficiation and desilicification on bauxite |
Non-Patent Citations (4)
| Title |
|---|
| 敖顺福 ; 赵华科 ; 谢立志 ; 胡彬 ; 李广利 ; .毛坪铅锌矿选矿技术进展评述.矿业研究与开发.2017,(第04期),全文. * |
| 李长颖 ; 庄故章 ; 钟旭群 ; .云南某铅锌矿浮选试验研究.有色金属(选矿部分).2009,(第06期),全文. * |
| 苏振华.广西盘龙铅锌矿低碱浮选试验研究.《矿冶》.2021,第30卷(第2期),全文. * |
| 郭亮明,王庚辰,李跃林,何海涛.某高碳、高硫复杂难选铅锌矿石选矿工艺研究.有色金属(选矿部分).2001,(第06期),全文. * |
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