CN107855223B - Beneficiation method for recovering zinc mineral from sulfur concentrate containing low-grade zinc - Google Patents
Beneficiation method for recovering zinc mineral from sulfur concentrate containing low-grade zinc Download PDFInfo
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- CN107855223B CN107855223B CN201711082076.3A CN201711082076A CN107855223B CN 107855223 B CN107855223 B CN 107855223B CN 201711082076 A CN201711082076 A CN 201711082076A CN 107855223 B CN107855223 B CN 107855223B
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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
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/06—Selection or use of additives to aid disintegrating
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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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
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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
- B03D1/08—Subsequent treatment of concentrated product
- B03D1/085—Subsequent treatment of concentrated product of the feed, e.g. conditioning, de-sliming
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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
Abstract
The invention discloses a beneficiation method for recovering zinc minerals from sulfur concentrates containing low-grade zinc, which comprises the steps of material preparation and ore grinding, zinc roughing concentrate concentration, zinc concentration and the like, and particularly aims at a selective collector XKP-007 of zincite, the collector has strong collecting capacity and selectivity on the zinc minerals in the sulfur concentrates, strengthens the hydrophobic floating of the zinc minerals, improves the zinc-sulfur separation efficiency, and furthest realizes the purpose of recovering valuable zinc minerals from the sulfur concentrates; therefore, the invention can obtain good zinc flotation indexes from the sulfur concentrate containing low-grade zinc, obtain qualified zinc concentrate products and develop novel high-efficiency zinc sulfide minerals.
Description
Technical Field
The invention relates to the technical field of flotation of non-ferrous metal ores, in particular to a beneficiation method for recovering a difficult-to-separate zinc mineral from a sulfur concentrate containing low-grade zinc.
Background
The zinc metal resource is one of important strategic resources in China, the consumption of the zinc resource in China is rapidly increased along with the rapid development of national economy, the zinc resource is easy to process, and the reserve of high-grade zinc-containing ores is rapidly reduced. At present, zinc minerals are mainly recovered in the forms of sphalerite, calamine and the like, wherein sulfide ores such as sphalerite, sphalerite and the like are mostly used. In zinc-containing sulfide ores, zinc minerals are often closely associated with pyrites such as pyrites and pyrrhotites, mineral laying relations are complex, floatability differences of the zinc minerals and the pyrites are small, particularly, floatability of the sphalerite and the pyrites is greatly influenced by pH, and in the zinc-sulfur separation and flotation operation under a high alkali condition, separation accuracy of the zinc minerals and the sulfur minerals is not enough, so that part of zinc minerals difficult to float enter sulfur concentrate, and utilization rate of zinc metal resources is influenced.
At present, relatively few research is conducted on ore dressing recovery of low-grade zinc in sulfur concentrate, most nonferrous metal mines cannot effectively recycle the zinc metal resources and sell the zinc metal resources in the sulfur concentrate in a low-price form, so that valuable resources are seriously lost, and the economic benefit and long-term development of enterprises are influenced. Therefore, the research on the beneficiation process for recovering the zinc mineral from the low-grade zinc-sulfur concentrate realizes the high-efficiency recovery and utilization of the part of zinc metal resources, and has important significance for improving the resource utilization rate and promoting the recycling economy and the sustainable development of enterprises.
Disclosure of Invention
The invention aims to solve the technical problems that the method for comprehensively recycling the sulfur concentrate containing low-grade zinc is few, the traditional beneficiation process has high separation and recovery difficulty, low separation efficiency, poor beneficiation comprehensive index and the like, and provides the beneficiation method for the difficultly separated zinc mineral of the sulfur concentrate containing low-grade zinc, which has high efficiency, stability, high separation efficiency, strong adaptability and good separation index, so that the zinc metal resource in the sulfur concentrate can be efficiently recycled.
In order to solve the technical problems, the invention adopts the following technical scheme: a beneficiation method for recovering zinc minerals from sulfur concentrates containing low-grade zinc is characterized by comprising the following steps: the method comprises the following steps of (1),
1) preparing materials and grinding: grinding and scrubbing the sulfur concentrate material to obtain ground ore pulp, wherein the material with the ground fineness of-0.074 mm accounts for 40-50% of the total material by mass, adding sodium sulfide serving as an adjusting agent and lime serving as 2000-4000 g/t into a grinding machine according to the proportion of 500-750 g/t, and adjusting the pH value of the ore pulp to 10-11;
2) performing first zinc roughing on the ore grinding pulp obtained in the step 1) to obtain a zinc rough concentrate I and zinc rough concentrate I tailings, wherein copper sulfate is added into the zinc rough concentrate I according to the proportion of 100-200 g/t, a collecting agent XKP-007 is added according to the proportion of 20-30 g/t, and No. 2 oil is added according to the proportion of 10-18 g/t;
3) performing secondary roughing on the zinc roughing I tailings obtained in the step 2) to obtain zinc roughing concentrates II and zinc roughing tailings II, wherein copper sulfate is added into the ore pulp according to the proportion of 100-200 g/t, XKP-007 is added according to the proportion of 20-30 g/t, and No. 2 oil is added according to the proportion of 5-10 g/t;
4) performing third roughing on the tailings of the zinc roughing II obtained in the step 3) to obtain zinc rough concentrate III and tailings, wherein the addition amount of copper sulfate in the third roughing is 50-100 g/t, and the addition amount of XKP-007 is 10-15 g/t;
5) concentrating ore pulp, namely mixing and concentrating the zinc rough concentrate I, the zinc rough concentrate II and the zinc rough concentrate III which are respectively obtained in the steps 2), 3) and 4);
6) zinc concentration, namely performing zinc concentration on the concentrated zinc mixed rough concentrate obtained in the step 5) for three times to obtain zinc concentrate, returning the middlings in the first concentration to the zinc rough concentrate II, returning the middlings in the second concentration to the first concentration, and returning the middlings in the third concentration to the second concentration; wherein the addition amount of the lime subjected to first concentration is 400-600 g/t, and the addition amounts of the lime subjected to second concentration and the No. 2 oil are 200-400 g/t and 3-6 g/t respectively; the third concentration is carried out without adding any flotation agent.
The collecting agent XKP-007 is prepared from raw materials of butyl xanthate allyl, ethyl xanthate and isoamyl xanthate in a mass ratio of 1: 2: 1, and stirring the mixture for 10 to 20 minutes by using a magnetic stirrer at normal temperature and normal pressure by using a beaker as a container.
Further, concentrating the ore pulp of the concentrated zinc mixed rough concentrate obtained in the step 5) from 8-12% to 30-35%.
Compared with the prior art, the method has the main advantages that firstly, aiming at the problems that the zinc minerals in the sulfur concentrate are closely embedded, the zinc-sulfur intergrowth minerals are more, the zinc minerals are partially oxidized, the original surface properties of the minerals are changed and the like, the sulfur concentrate is subjected to proper ore grinding and then subjected to flotation process, and sodium sulfide and lime are added in the ore grinding process to adjust the ore pulp atmosphere. On one hand, the ore grinding has the functions of dissociating the intergrowth and scrubbing the surface of the mineral, so that the useful zinc mineral is exposed out of the fresh surface, and the action effect of the mineral and the flotation reagent is improved; on the other hand, the sodium sulfide and the lime are added into the mill, so that the action time of the medicament and the minerals is prolonged, the surface property of the minerals is improved, the pH value of the zinc-sulfur separation ore pulp and the ore pulp potential environment are optimally regulated and controlled, good conditions are created for efficient separation of zinc-sulfur, in addition, the sodium sulfide also plays a role in activating the zinc minerals through vulcanization, and the flotation speed of the zinc minerals which are difficult to float is enhanced;
secondly, the invention develops a novel high-efficiency zinc sulfide mineral selective collector XKP-007 which has strong collecting capability and selectivity for zinc minerals in sulfur concentrate, strengthens the hydrophobic selective floating of the zinc minerals, promotes the hydrophobic capability of the zinc minerals difficult to float, and obviously improves the separation efficiency and precision of the sulfur concentrate and the sphalerite.
Thirdly, aiming at the adverse factors of low zinc content in the sulfur concentrate, small floating amount of zinc minerals, low flotation speed and the like, the invention provides three-stage zinc roughing to strengthen the floating of the zinc minerals.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following is further illustrated with reference to specific examples:
firstly, preparing a high-efficiency zinc sulfide mineral collector XKP-007, mixing 10g of butyl xanthate allyl, 20g of ethyl xanthate and 10g of isoamyl xanthate, and stirring for 10-20 minutes by using a beaker as a container and a magnetic stirrer at normal temperature and normal pressure to obtain the collector XKP-007.
Example 1, the sorted zinc-containing sulfur concentrate contains 0.23% of lead, 0.46% of zinc, 44.10% of iron and 49.04% of sulfur; the main metal mineral is pyrite, zinc occurs in the form of willemite, and a small amount of gangue minerals are quartz.
Referring to fig. 1, the sorting steps are as follows:
1) adding 500g/t of sodium sulfide and 4000g/t of lime into a mill, wherein the pH value of ore pulp is about 11, and grinding sulfur concentrate to 40% of ore with the granularity level of-0.074 mm in percentage by mass of the total ore;
2) performing primary zinc roughing on the ore grinding pulp obtained in the step 1) to obtain zinc rough concentrate I and zinc rough concentrate I tailings, wherein 100g/t of copper sulfate is added into the zinc rough concentrate I pulp, the using amount of XKP-007 is 30g/t, and 18g/t of 2# oil is added into the zinc rough concentrate I pulp;
3) zinc roughing II, performing secondary roughing on the tailings of the zinc roughing I obtained in the step 2) to obtain zinc rough concentrate II and zinc roughing tailings II, wherein 100g/t of copper sulfate is added into the ore pulp, the using amount of XKP-007 is 30g/t, and 10g/t of 2# oil is added into the ore pulp;
4) performing zinc roughing III, and performing third roughing on the tailings of the zinc roughing II obtained in the step 3) to obtain zinc rough concentrate III and tailings, wherein the copper sulfate for the third roughing is 50g/t, and the using amount of XKP-007 is 15 g/t;
5) concentrating ore pulp, namely mixing and concentrating the zinc rough concentrate I, the zinc rough concentrate II and the zinc rough concentrate III which are respectively obtained in the steps 2), 3) and 4), wherein the concentration of the ore pulp of the zinc mixed rough concentrate is concentrated from 8% to 30%;
6) zinc concentration, namely performing zinc concentration on the concentrated zinc mixed rough concentrate obtained in the step 5) for three times to obtain zinc concentrate, returning the middlings in the first concentration to the zinc rough concentrate II, returning the middlings in the second concentration to the first concentration, and returning the middlings in the third concentration to the second concentration; wherein the dosage of lime in the first fine selection is 400g/t, and the dosages of lime and No. 2 oil in the second fine selection are 200g/t and 3g/t respectively; the third concentration is carried out without adding any flotation agent.
The beneficiation test results are shown in table 1 below:
TABLE 1 flotation test index (%)
Example 2, the sorted zinc-containing sulfur concentrate contains 0.19 percent of lead, 0.52 percent of zinc, 42.53 percent of iron and 46.18 percent of sulfur; the main metal mineral is pyrite, zinc occurs in the form of willemite, and a small amount of gangue minerals are quartz.
Referring to fig. 1, the sorting steps are:
1) adding 750g/t of sodium sulfide and 2000g/t of lime into a mill, wherein the pH value of ore pulp is about 10, and grinding sulfur concentrate to 50% of ore accounting for the total mass percentage of ore with the granularity level of-0.074 mm;
2) zinc roughing I, performing primary zinc roughing on the ore grinding pulp obtained in the step 1) to obtain zinc rough concentrate I and zinc roughing I tailings, wherein 200g/t of copper sulfate is added into the ore pulp of the zinc roughing I, the using amount of XKP-007 is 20g/t, and 10g/t of 2# oil is added into the ore pulp of the zinc roughing I;
3) zinc roughing II, performing secondary roughing on the tailings of the zinc roughing I obtained in the step 2) to obtain zinc rough concentrate II and zinc roughing tailings II, wherein 200g/t of copper sulfate is added into the ore pulp, the using amount of XKP-007 is 20g/t, and 5g/t of 2# oil is added into the ore pulp;
4) performing zinc roughing III, and performing third roughing on the tailings of the zinc roughing II obtained in the step 3) to obtain zinc rough concentrate III and tailings, wherein the copper sulfate for the third roughing is 100g/t, and the using amount of XKP-007 is 10 g/t;
5) concentrating ore pulp, namely mixing and concentrating the zinc rough concentrate I, the zinc rough concentrate II and the zinc rough concentrate III which are respectively obtained in the steps 2), 3) and 4), wherein the concentration of the ore pulp of the zinc mixed rough concentrate is concentrated from 12% to 35%;
6) zinc concentration, namely performing zinc concentration on the concentrated zinc mixed rough concentrate obtained in the step 5) for three times to obtain zinc concentrate, returning the middlings in the first concentration to the zinc rough concentrate II, returning the middlings in the second concentration to the first concentration, and returning the middlings in the third concentration to the second concentration; wherein the lime dosage in the first fine selection is 600g/t, and the lime dosage and the 2# oil dosage in the second fine selection are 400g/t and 6g/t respectively; the third concentration is carried out without adding any flotation agent.
The beneficiation test results are shown in table 2 below:
TABLE 2 flotation test index (%)
The present invention has been described in detail, and it should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Claims (3)
1. A beneficiation method for recovering zinc minerals from sulfur concentrates containing low-grade zinc is characterized by comprising the following steps: the zinc content of the selected zinc-containing sulfur concentrate is 0.46 percent or 0.52 percent, and the method is carried out according to the following steps,
1) preparing materials and grinding: grinding and scrubbing the sulfur concentrate material to obtain ground ore pulp, wherein the material with the ground fineness of-0.074 mm accounts for 40-50% of the total material by mass, adding sodium sulfide serving as an adjusting agent and lime serving as 2000-4000 g/t into a grinding machine according to the proportion of 500-750 g/t, and adjusting the pH value of the ore pulp to 10-11;
2) performing first zinc roughing on the ore grinding pulp obtained in the step 1) to obtain a zinc rough concentrate I and zinc rough concentrate I tailings, wherein copper sulfate is added into the zinc rough concentrate I according to the proportion of 100-200 g/t, a collecting agent XKP-007 is added according to the proportion of 20-30 g/t, and No. 2 oil is added according to the proportion of 10-18 g/t;
3) performing secondary roughing on the zinc roughing I tailings obtained in the step 2) to obtain zinc roughing concentrates II and zinc roughing tailings II, wherein copper sulfate is added into the ore pulp according to the proportion of 100-200 g/t, XKP-007 is added according to the proportion of 20-30 g/t, and No. 2 oil is added according to the proportion of 5-10 g/t;
4) performing third roughing on the tailings of the zinc roughing II obtained in the step 3) to obtain zinc rough concentrate III and tailings, wherein the addition amount of copper sulfate in the third roughing is 50-100 g/t, and the addition amount of XKP-007 is 10-15 g/t;
5) concentrating ore pulp, namely mixing and concentrating the zinc rough concentrate I, the zinc rough concentrate II and the zinc rough concentrate III which are respectively obtained in the steps 2), 3) and 4);
6) zinc concentration, namely performing zinc concentration on the concentrated zinc mixed rough concentrate obtained in the step 5) for three times to obtain zinc concentrate, returning the middlings in the first concentration to the zinc rough concentrate II, returning the middlings in the second concentration to the first concentration, and returning the middlings in the third concentration to the second concentration; wherein the addition amount of the lime subjected to first concentration is 400-600 g/t, and the addition amounts of the lime subjected to second concentration and the No. 2 oil are 200-400 g/t and 3-6 g/t respectively; the third concentration is not added with any flotation agent;
the collecting agent XKP-007 is prepared by taking butyl xanthate allyl, ethyl xanthate and isoamyl xanthate as raw materials and stirring for 10-20 minutes at normal temperature and normal pressure.
2. The beneficiation process to recover zinc minerals from low grade zinc containing sulphur concentrates according to claim 1, characterized in that: raw materials of butyl xanthate allyl, ethyl xanthate and isoamyl xanthate for preparing the collecting agent XKP-007 are 1: 2: 1, taking a beaker as a container at normal temperature and normal pressure, and stirring for 10-20 minutes by using a magnetic stirrer to obtain the product.
3. The beneficiation process to recover zinc minerals from low grade zinc containing sulphur concentrates according to claim 1, characterized in that: and 5) concentrating the ore pulp of the concentrated zinc mixed rough concentrate obtained in the step 5) from 8-12% to 30-35%.
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| PL161840B1 (en) * | 1989-02-28 | 1993-08-31 | Akad Gorniczo Hutnicza | Method of dolomite assisted flotation of zinc-lead ore containing impergnations sulfide-type zinc and lead minerals |
| CN105251620B (en) * | 2014-07-18 | 2017-06-13 | 沈阳有色金属研究院 | A kind of complicated beneficiation method containing arsenic lead-zinc sulfide ore |
| CN104475267A (en) * | 2014-11-24 | 2015-04-01 | 西北矿冶研究院 | Galena collecting agent and preparation method thereof |
| 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 |
| CN106269290B (en) * | 2016-10-26 | 2018-07-27 | 中国科学院过程工程研究所 | The method for floating of decopperized lead zinc from highgrade pyrite concentrate |
| CN107252731B (en) * | 2017-07-28 | 2019-01-15 | 西部矿业股份有限公司 | One kind containing marmatite, magnetic iron ore fine grain teeth cloth type lead zinc sulphur ore beneficiation method |
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