CN115608520A - Flotation method for non-desliming lepidolite - Google Patents

Flotation method for non-desliming lepidolite Download PDF

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Publication number
CN115608520A
CN115608520A CN202211318226.7A CN202211318226A CN115608520A CN 115608520 A CN115608520 A CN 115608520A CN 202211318226 A CN202211318226 A CN 202211318226A CN 115608520 A CN115608520 A CN 115608520A
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lepidolite
flotation
concentrate
product
desliming
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陈红康
孙爱明
廖敏敏
赵辉
钟海峰
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Yifeng Guoxuan Lithium Industry Co ltd
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Yifeng Guoxuan Lithium Industry Co ltd
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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
    • B03D3/00—Differential sedimentation
    • B03D3/06—Flocculation
    • 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
    • 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
    • B03D1/02—Froth-flotation processes
    • 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
    • B03D2201/002—Coagulants and Flocculants
    • 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
    • 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
    • B03D2201/06—Depressants
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides a flotation method of lepidolite without desliming, which comprises the following steps: s1, coarse grinding: ball-milling raw lepidolite ore to obtain flotation feed ore; s2, rough selection: fully mixing flotation feed with an inhibitor, then adding a collecting agent and a polymeric flocculant, fully mixing, and then inflating and scraping bubbles to obtain rougher concentrate and rougher tailings; s3, scavenging: fully mixing the roughed tailings obtained in the step S2 with a collecting agent, inflating and scraping to obtain scavenging foam products and scavenging tailings, and returning the scavenging foam products to the step S2 for rougher flotation; s4, selection: and (3) fully mixing the roughed concentrate obtained in the step (S2) with an inhibitor, and then inflating and scraping to obtain the lepidolite concentrate. The invention utilizes the good floatability characteristic of lepidolite in a wider pH value range, adopts the technical process of floatation of lepidolite without desliming, utilizes the flocculation floatation method, realizes the floatation without desliming under the condition of simple separation technical process, and obviously improves the recovery rate of lithium while improving the grade of lepidolite concentrate.

Description

Flotation method for non-desliming lepidolite
Technical Field
The invention relates to the technical field of mineral separation, in particular to a flotation method of non-desliming lepidolite.
Background
Lithium is the lightest metal element, has very strong metal activity, is used as a high-energy metal, is mainly applied to the nuclear industry, the battery industry and the solid fuel industry, and also has application in the fields of aerospace, ceramics, metallurgy, chemical engineering, lubrication, glass, medicine and the like. Lepidolite is the most common lithium mineral, and lepidolite is also a lithium-containing mineral with a large reserve in China, is one of the most important resources for extracting lithium elements, and the lithium demand of new energy automobiles and energy storage industries is greatly increased under the drive of a double-carbon target.
The existing lepidolite beneficiation method is mainly flotation, in the lepidolite recycling process of a beneficiation plant, an ore over-crushing phenomenon inevitably occurs in the ore crushing and grinding processes to generate ore slime, and the ore slime is added with primary ore slime in the ore, the ore slime is attached to the surface of lepidolite mineral to influence the collection of lepidolite and greatly influence the flotation index of the lepidolite, so the existing lepidolite beneficiation process adopts a desliming flotation process flow. But the yield of the slime product is about 15% of the raw ore processed by the mill. For example, chinese patent CN107008567a discloses a lepidolite flotation method, which comprises the following steps: the specification of the flotation process flow of desliming twice and one coarse flotation and two fine flotation after grinding the raw ore shows that the yield of the slime reaches 17-19 percent, the overall recovery rate is 66.38 percent, and the desliming operation has high yield of the slime, so that the recovery rate of lepidolite is low, and the lepidolite mineral resources are greatly wasted.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a floatation method of lepidolite without slime separation.
The invention provides a flotation method of lepidolite without desliming, which comprises the following steps:
s1, coarse grinding: ball-milling raw lepidolite ore to obtain flotation feed ore;
s2, rough selection: fully mixing flotation feed with an inhibitor, then adding a collecting agent and a polymeric flocculant, fully mixing, and then inflating and scraping bubbles to obtain rougher concentrate and rougher tailings;
s3, scavenging: fully mixing the rougher tailings in the step S2 with a collecting agent, inflating and scraping to obtain scavenged foam products and scavenged tailings, and returning the scavenged foam products to the step S2 for roughing;
s4, selecting: and (3) fully mixing the roughed concentrate obtained in the step (S2) with an inhibitor, and then inflating and scraping to obtain the lepidolite concentrate.
Preferably, in the step S2, the concentration of the ore pulp of the flotation feeding is 30-40%, the pH value of the ore pulp is 6.5-7.5, and the content of ground product-0.075 mm in the flotation feeding is not lower than 75%.
Preferably, step S4 includes the steps of:
s41, primary selection: fully mixing the roughing concentrate obtained in the step S1 with an inhibitor, inflating and scraping bubbles to obtain a primary fine-concentration foam product and a primary middling product, and returning the primary middling product to the step S2 for roughing;
s42, secondary selection: and (5) fully stirring the fine-concentration foam product obtained in the step (S31), inflating and scraping to obtain lepidolite concentrate and a secondary middling product, and returning the secondary middling product to the step (S41) for fine concentration.
Preferably, the inhibitor consists of water glass and sodium hexametaphosphate, wherein the water glass is 2.3-2.5 modulus water glass, and the mass ratio of the water glass to the sodium hexametaphosphate is 1.
Preferably, in step S2, the addition amount of the inhibitor is 375-750g/t, wherein the addition amount of the water glass is 150-300g/t, and the addition amount of the sodium hexametaphosphate is 225-450g/t.
Preferably, the collector consists of cocoamine and emulsified oleic acid, and the mass ratio of cocoamine to emulsified oleic acid is 1:2.
Preferably, in the step S2, the addition amount of the collector is 600-1200g/t, wherein the addition amount of the cocoamine is 200-400g/t, and the addition amount of the emulsified oleic acid is 400-800g/t.
Preferably, in step S2, the addition amount of the polymeric flocculant is 50 to 200g/t.
Preferably, in the step S3, the addition amount of the collecting agent is 75-150g/t, wherein the addition amount of the cocoamine is 25-50g/t, and the addition amount of the emulsified oleic acid is 50-100g/t.
Preferably, in step S41, the amount of inhibitor added is 30 to 80g/t.
According to the flotation method of the non-desliming lepidolite, the polymeric flocculant is added in the rough concentration process, due to the fact that the collecting agent is used, the foam amount is large, the polymeric flocculant has a certain defoaming effect and can stabilize foam, so that groove leakage and a large amount of virtual bubbles are avoided, after the foam is stabilized, a large amount of mud and impurities on the foam belt are settled and separated from the foam, selective flocculation is carried out on the lepidolite (namely, a flocculation flotation method is utilized), then flocculent small groups mainly composed of the lepidolite are floated out through the collecting agent, the collecting effect of the collecting agent is prominent, the lepidolite impurities and the mud content obtained through collection are low, so that flotation concentrate with qualified grade is obtained, and after the rough concentration is refined for 2 times, the lepidolite concentrate with qualified grade is obtained; according to the invention, the lepidolite has a good floatability characteristic in a wide pH value range (pH = 2-11), the process flow of desliming flotation of the lepidolite is adopted, the medicament combination of the inhibitor, the collecting agent and the selective polymeric flocculant is adopted, and the flocculation flotation method is utilized, so that the desliming flotation is realized under the condition of a simple separation process, the grade of the lepidolite concentrate is improved, the recovery rate of lithium is obviously improved, and the defect of low recovery rate of the lepidolite recovered by the existing lepidolite desliming separation process is overcome; the polymeric flocculant can be polyacrylamide or other high molecular polymers.
The flotation method recovers and obtains the lepidolite concentrate with the grade of more than 2.5 percent from the lepidolite with the content of 0.15 to 0.25 percent, realizes the separation of high-grade lepidolite concentrate from the lepidolite ore, greatly improves the recovery rate of the lepidolite concentrate, provides a feasible way for the lepidolite ore to adopt a non-desliming separation process, realizes the comprehensive utilization of lepidolite resources, increases the enterprise benefit, reduces the operation cost, reduces the tailing discharge and effectively promotes the energy conservation and emission reduction.
The lepidolite collecting agent disclosed by the invention consists of coconut oil amine and emulsified oleic acid, the mass ratio of the coconut oil amine to the emulsified oleic acid is 1:2, and lepidolite can be selectively collected; the water glass and the sodium hexametaphosphate are added during the flotation, so that the water glass and the sodium hexametaphosphate are mainly used as an inhibitor and a dispersant, and the content of slime in overflow of the cyclone is high, so that the foam phenomenon is effectively improved, the foam generation amount is controlled, gangue minerals with floatability similar to lepidolite can be strongly inhibited, and a good collecting environment is provided for the collecting agent.
In order to improve the recovery rate, in step S2, scavenged tailings and scavenged concentrate are obtained after the scavenged tailings are subjected to scavenging flotation, the scavenged concentrate returns to the roughing flotation for continuous flotation, and the scavenged tailings are used as final tailings.
In the concentration process, 30-80g/t of inhibitor is required to be added during the first concentration flotation, and the second concentration flotation is blank flotation, so that the flotation effect is ensured, the use of flotation reagents is reduced, and the flotation cost is reduced.
Drawings
FIG. 1 is a process flow diagram of a floatation method of lepidolite without desliming, which is provided by the invention.
Detailed Description
Referring to fig. 1, the invention provides a flotation method of lepidolite without desliming, which comprises the following steps:
s1, coarse grinding: ball-milling raw lepidolite ore to obtain flotation feed ore;
s2, rough selection: fully mixing flotation feed with an inhibitor, then adding a collecting agent and a polymeric flocculant, fully mixing, and then inflating and scraping bubbles to obtain rougher concentrate and rougher tailings;
specifically, the concentration of the ore pulp in the flotation feeding is 30-40%, the pH value of the ore pulp is 6.5-7.5, and the content of ground products of-0.075 mm in the flotation feeding is not lower than 75%.
S3, scavenging: fully mixing the roughed tailings obtained in the step S2 with a collecting agent, inflating and scraping to obtain scavenging foam products and scavenging tailings, and returning the scavenging foam products to the step S2 for rougher flotation;
s4, selection: fully mixing the roughed concentrate obtained in the step S2 with an inhibitor, and then inflating and scraping to obtain lepidolite concentrate; the method specifically comprises the following steps:
s41, primary selection: fully mixing the roughing concentrate obtained in the step S1 with an inhibitor, inflating and scraping bubbles to obtain a primary fine-concentration foam product and a primary middling product, and returning the primary middling product to the step S2 for roughing;
s42, secondary selection: and (5) fully stirring the fine-concentration foam product obtained in the step (S31), inflating and scraping to obtain lepidolite concentrate and a secondary middling product, and returning the secondary middling product to the step (S41) for fine concentration.
Specifically, the polymeric flocculant may be polyacrylamide, or may be other polymeric compounds.
Specifically, the inhibitor consists of water glass and sodium hexametaphosphate, wherein the water glass is 2.3-2.5 modulus water glass, and the mass ratio of the water glass to the sodium hexametaphosphate is 1.
Specifically, the collector consists of coconut amine and emulsified oleic acid, and the mass ratio of the coconut amine to the emulsified oleic acid is 1:2.
The invention will be further explained and illustrated with reference to specific examples.
Example one
A flotation method of lepidolite without desliming comprises the following steps:
s1, coarse grinding:selecting some lepidolite ore in Jiangxi Yifeng, the gangue mainly comprises quartz, feldspar, calcite and the like, and the raw ore Li 2 The O grade is 0.23 percent, and the content of minus 200 meshes is 30 to 40 percent; sieving the original ore by using a 200-mesh sieve, and grinding the sieved product for 20 minutes to obtain coarse ground ore; the coarsely ground ore and undersize products are jointly used as flotation feeding ore, and the content of the-200 meshes is 83 percent;
s2, rough selection: adding the flotation feed into a mechanical stirring type flotation machine, adjusting the concentration of the ore pulp to be 35 percent and the pH value of the ore pulp to be 6.5-7.5, adding 375g/t of inhibitor, fully stirring for 3min, adding 600g/t of collecting agent and 50g/t of polymeric flocculant, and fully stirring for 3min; after fully stirring, aerating and scraping bubbles to obtain rougher concentrate and rougher tailings;
s3, scavenging: adding 75g/t of collecting agent into the roughed tailings obtained in the step S2, fully stirring, inflating and scraping to obtain scavenging foam products, wherein the ores in the grooves are scavenging tailings, and returning the scavenging foam products to the step S2 for roughing;
s4, twice fine selection:
s41, primary selection: feeding the rough concentration obtained in the step S2 into a first fine flotation operation, wherein the specific steps are as follows: adding 30g/t of inhibitor, stirring, fully mixing, inflating and scraping bubbles to obtain a primary fine selection foam product and a primary middling product, and returning the primary middling product to the step S2 for rough selection;
s42, secondary selection: and (4) feeding the primary concentrated foam product into secondary concentrated flotation operation, fully stirring, then starting inflating and scraping to obtain lepidolite concentrate and a secondary middling product, and returning the secondary middling product to the step S41 for concentration.
By detection, the original ore Li in this example 2 O grade of 0.23%, lepidolite concentrate Li 2 The O grade is 2.65 percent, and the tailing product Li 2 The O grade is 0.04 percent, and the recovery rate is 83.87 percent.
Example two
A flotation method of lepidolite without desliming specifically comprises the following steps:
s1, coarse grinding: selecting some lepidolite ore in Jiangxi Yifeng, wherein the gangue mainly comprises quartz, feldspar, calcite and the like, the Li2O grade of the raw ore is 0.20 percent, and the content of minus 200 meshes is 32 to 45 percent; sieving the original ore by using a 200-mesh sieve, grinding the oversize product for 20 minutes to obtain coarse ground ore, and using the coarse ground product and the undersize product as flotation ore feeding with the-200-mesh content of 85 percent;
s2, rough selection: adding the flotation feed into a mechanical stirring type flotation machine, adjusting the concentration of the pulp to be 40 percent and the pH value of the pulp to be 6.5-7.5, adding 500g/t of inhibitor, fully stirring for 3min, adding 800g/t of collecting agent and 75g/t of polymeric flocculant, and fully stirring for 3min; after fully stirring, aerating and scraping bubbles to obtain rougher concentrate and rougher tailings;
s3, scavenging: adding 120g/t of collecting agent into the roughed tailings obtained in the step S2, fully stirring, inflating and scraping to obtain scavenging foam products, wherein the ores in the grooves are scavenging tailings, and returning the scavenging foam products to the step S2 for roughing;
s4, twice fine selection
S41, primary selection: feeding the rough concentration obtained in the step S2 into one fine flotation operation, which specifically comprises the following steps: adding 35g/t of inhibitor, fully stirring, inflating and scraping bubbles to obtain a primary fine selection foam product and a primary middling product, and returning the primary middling product to the step S2 for rough selection;
s42, secondary selection: and (4) feeding the primary concentrated foam product into secondary concentrated flotation operation, fully stirring, inflating and scraping to obtain lepidolite concentrate and a secondary middling product, and returning the secondary middling product to the step S41 for concentration.
By detection, the original ore Li in this example 2 The O grade is 0.20 percent, and the lepidolite concentrate product Li 2 The O grade is 2.55 percent, and the tailing product Li 2 The O grade is 0.04 percent, and the recovery rate is 81.27 percent.
EXAMPLE III
A flotation method of lepidolite without desliming specifically comprises the following steps:
s1, coarse grinding: selecting some lepidolite ore in Jiangxi Yifeng, wherein the gangue mainly comprises quartz, feldspar, calcite and the like, the Li2O grade of the raw ore is 0.18 percent, and the content of minus 200 meshes is 25 to 40 percent; sieving the original ore by using a 200-mesh sieve, grinding the oversize product for 20 minutes to obtain coarse ground ore, and feeding the coarse ground ore and the undersize product together as flotation with the ore-200-mesh content of 78%;
s2, rough selection: adding the flotation feed into a mechanical stirring type flotation machine, adjusting the concentration of the pulp to be 40 percent and the pH value of the pulp to be 6.5-7.5, adding 650g/t of inhibitor, fully stirring for 3min, adding 850g/t of collecting agent and 80g/t of polymeric flocculant, and fully stirring for 3min. After fully stirring, aerating and scraping bubbles to obtain rougher concentrate and rougher tailings;
s3, scavenging: adding 120g/t of collecting agent into the roughed tailing product obtained in the step S2, fully stirring, inflating and scraping bubbles to obtain scavenging foam products, wherein the ores in the grooves are scavenging tailings, and returning the scavenging foam products to the step S2 for roughing;
s4, twice fine selection:
s41, primary selection: and (3) feeding the rougher concentrate obtained in the step (S2) into a first-time fine-selection flotation operation, which specifically comprises the following steps: adding 35g/t of inhibitor, fully stirring, inflating and scraping bubbles to obtain a primary fine selection foam product and a primary middling product, and returning the primary middling product to the step S2 for rough selection;
s42, secondary selection: and (4) feeding the primary concentrated foam product into secondary concentrated flotation operation, fully stirring, inflating and scraping to obtain a final concentrate foam product and a secondary middling product, and returning the secondary middling product to the step S41 for concentration.
By detection, the original ore Li in this example 2 The O grade is 0.18 percent, and the lepidolite concentrate product Li 2 The O grade is 2.60 percent, and the tailing product Li 2 The O grade is 0.03 percent, and the recovery rate is 84.31 percent.
Example four
A flotation method of lepidolite without desliming specifically comprises the following steps:
s1, coarse grinding: selecting some lepidolite ore in Jiangxi Yifeng, wherein the gangue mainly comprises quartz, feldspar, calcite and the like, the Li2O grade of the raw ore is 0.27 percent, and the content of minus 200 meshes is 20 to 40 percent; sieving the original ore by using a 200-mesh sieve, grinding the oversize product for 20 minutes to obtain coarse ground ore, and using the coarse ground product and the undersize product as flotation feed ore with the-200-mesh content of 71 percent;
s2, rough selection: adding the flotation feed into a mechanical stirring type flotation machine, adjusting the concentration of the pulp to be 45 percent and the pH value of the pulp to be 6.5-7.5, adding 700g/t of inhibitor, fully stirring for 3min, adding 1000g/t of collecting agent and 180g/t of polymeric flocculant, and fully stirring for 3min. After fully stirring, aerating and scraping bubbles to obtain rougher concentrate and rougher tailings;
s3, scavenging: adding 135g/t of collecting agent into the roughed tailing product obtained in the step S2, fully stirring, inflating and scraping to obtain scavenging foam product, wherein the ore in the groove is scavenging tailing, and returning the scavenging foam product to the step S2 for rougher flotation;
s4, twice fine selection:
s41, primary selection: feeding the roughed concentrate obtained in the step S2 into a first concentration flotation operation, which specifically comprises the following steps: adding 55g/t of inhibitor, fully stirring, inflating and scraping bubbles to obtain a primary fine selection foam product and a primary middling product, and returning the primary middling product to the step S2 for rough selection;
s42, secondary selection: and (4) feeding the primary concentrated foam product into secondary concentrated flotation operation, fully stirring, inflating and scraping to obtain a final concentrate foam product and a secondary middling product, and returning the secondary middling product to the step S41 for concentration.
By detection, the original ore Li in this example 2 The O grade is 0.27 percent, and the lepidolite concentrate product Li 2 The O grade is 2.71 percent, and the tailing product Li 2 The O grade is 0.04 percent, and the recovery rate is 84.46 percent.
EXAMPLE five
A flotation method of lepidolite without desliming specifically comprises the following steps:
s1, coarse grinding: selecting some lepidolite ore in Jiangxi Yifeng, wherein the gangue mainly comprises quartz, feldspar, calcite and the like, the Li2O grade of the raw ore is 0.31 percent, and the content of minus 200 meshes is 25 to 35 percent. Sieving the original ore by using a 200-mesh sieve, grinding the oversize product for 20 minutes to obtain coarse ground ore, and using the coarse ground product and the undersize product as flotation feed ore with the-200-mesh content of 81 percent;
s2, rough selection: adding the flotation feed into a mechanical stirring type flotation machine, adjusting the concentration of the pulp to be 40 percent and the pH value of the pulp to be 6.5-7.5, adding 750g/t of inhibitor, fully stirring for 3min, adding 1200g/t of collecting agent and 200g/t of polymeric flocculant, and fully stirring for 3min; after fully stirring, aerating and scraping bubbles to obtain rougher concentrate and rougher tailings;
s3, scavenging: adding 150g/t of collecting agent into the rougher tailings obtained in the step S2, fully stirring, inflating and scraping bubbles to obtain scavenging foam products, wherein the ores in the grooves are scavenging tailings, and returning the scavenging foam products to the step S2 for roughing;
s4, twice fine selection:
s41, primary selection: feeding the roughed concentrate obtained in the step S2 into a first concentration flotation operation, which specifically comprises the following steps: adding 80g/t of inhibitor, fully stirring, inflating and scraping bubbles to obtain a primary fine selection foam product and a primary middling product, and returning the primary middling product to the step S2 for rough selection;
s42, secondary selection: and (4) feeding the primary concentrated foam product into secondary concentrated flotation operation, fully stirring, inflating and scraping to obtain a final concentrate foam product and a secondary middling product, and returning the secondary middling product to the step S41 for concentration.
By detection, the original ore Li in the embodiment 2 The O grade is 0.31 percent, and the lepidolite concentrate product Li 2 The O grade is 2.85 percent, and the tailing product Li 2 The O grade is 0.05 percent, and the recovery rate is 85.37 percent.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A flotation method of lepidolite without desliming is characterized by comprising the following steps:
s1, coarse grinding: ball-milling raw lepidolite ore to obtain flotation feed ore;
s2, rough selection: fully mixing flotation feed with an inhibitor, then adding a collecting agent and a polymeric flocculant, fully mixing, and then inflating and scraping bubbles to obtain rougher concentrate and rougher tailings;
s3, scavenging: fully mixing the roughed tailings obtained in the step S2 with a collecting agent, inflating and scraping to obtain scavenging foam products and scavenging tailings, and returning the scavenging foam products to the step S2 for rougher flotation;
s4, selecting: and (3) fully mixing the roughed concentrate obtained in the step (S2) with an inhibitor, and then inflating and scraping to obtain the lepidolite concentrate.
2. A non-sliming lepidolite flotation method according to claim 1 wherein in step S2 the pulp concentration of the feed flotation is 30% to 40%, the pulp pH is 6.5 to 7.5 and the content of ground product-0.075 mm in the feed flotation is not less than 75%.
3. The non-slime-shedding lepidolite flotation method according to claim 1, wherein step S4 comprises the steps of:
s41, primary selection: fully mixing the roughing concentrate obtained in the step S1 with an inhibitor, inflating and scraping bubbles to obtain a primary fine-concentration foam product and a primary middling product, and returning the primary middling product to the step S2 for roughing;
s42, secondary selection: and (5) fully stirring the fine-concentration foam product obtained in the step (S31), inflating and scraping to obtain lepidolite concentrate and a secondary middling product, and returning the secondary middling product to the step (S41) for fine concentration.
4. The flotation method of lepidolite not to desliming according to claim 1 or 3, wherein the depressor is composed of water glass and sodium hexametaphosphate, the water glass is 2.3-2.5 modulus water glass, and the mass ratio of the water glass to the sodium hexametaphosphate is 1.
5. The flotation method of lepidolite not to desliming according to claim 4, wherein in step S2, the addition amount of the depressor is 375 to 750g/t, wherein the addition amount of the water glass is 150 to 300g/t, and the addition amount of the sodium hexametaphosphate is 225 to 450g/t.
6. A non-desliming lepidolite flotation process according to any one of claims 1 to 3 wherein the collector consists of coconut amine and emulsified oleic acid, the mass ratio of coconut amine to emulsified oleic acid being 1:2.
7. The non-desliming lepidolite flotation method according to claim 6, wherein in step S2, the addition amount of the collector is 600-1200g/t, wherein the addition amount of cocoamine is 200-400g/t, and the addition amount of emulsified oleic acid is 400-800g/t.
8. A non-sliming lepidolite flotation method according to any one of claims 1 to 3 wherein in step S2 the polymeric flocculant is added in an amount of 50 to 200g/t.
9. The non-slime-shedding lepidolite flotation method according to claim 6, wherein in step S3, the addition amount of the collecting agent is 75-150g/t, wherein the addition amount of cocoamine is 25-50g/t, and the addition amount of emulsified oleic acid is 50-100g/t.
10. The flotation method of lepidolite not to be deslimed according to claim 4, wherein in step S41, the amount of the inhibitor added is 30 to 80g/t.
CN202211318226.7A 2022-10-26 2022-10-26 Flotation method for non-desliming lepidolite Pending CN115608520A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117019379A (en) * 2023-08-10 2023-11-10 昆明理工大学 Bubble control flotation method for argillaceous lepidolite ore

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117019379A (en) * 2023-08-10 2023-11-10 昆明理工大学 Bubble control flotation method for argillaceous lepidolite ore
CN117019379B (en) * 2023-08-10 2024-05-24 昆明理工大学 Bubble control flotation method for argillaceous lepidolite ore

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