CN111804439B - Beneficiation method for carbon-containing lead-zinc sulfide ore - Google Patents
Beneficiation method for carbon-containing lead-zinc sulfide ore Download PDFInfo
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- CN111804439B CN111804439B CN202010696888.2A CN202010696888A CN111804439B CN 111804439 B CN111804439 B CN 111804439B CN 202010696888 A CN202010696888 A CN 202010696888A CN 111804439 B CN111804439 B CN 111804439B
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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
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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
- B03D2201/02—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
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/04—Frothers
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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
- B03D2201/06—Depressants
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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 carbon-containing lead-zinc sulfide ores, which belongs to the technical field of beneficiation and comprises the following steps: (1) grinding the raw ore to obtain ore pulp with preset fineness; (2) adding a carbon inhibitor into the ore pulp after ore grinding, and uniformly stirring to obtain the ore pulp after size mixing; (3) adding a collecting agent and a foaming agent into the pulp after size mixing to perform lead flotation to obtain lead concentrate and lead flotation tailings; (4) adding a carbon inhibitor into the lead flotation tailings, and performing zinc flotation to obtain zinc concentrate and tailings. The invention provides a beneficiation method of carbon-containing lead sulfide zinc ore, the adopted inhibitor has a high-selectivity inhibition effect, can efficiently selectively inhibit carbon-containing impurities in the flotation of lead sulfide and zinc, and is convenient for realizing the efficient enrichment and recovery of lead sulfide and zinc.
Description
Technical Field
The invention belongs to the technical field of ore dressing, and relates to an ore dressing method for carbon-containing lead-zinc sulfide ores.
Background
The lead-zinc sulfide ore contains lead, zinc, copper, silver, sulfur, tin and other metals, has large storage capacity, is mainly concentrated in Yunnan, inner Mongolia, Gansu, Guangdong, Hunan and Guangxi areas, has high economic value, but has fine embedded granularity of minerals and higher carbon content in gangue, and belongs to refractory ore.
The separation of useful minerals from gangue minerals, especially the selective separation of the minerals of interest, is the goal of flotation. In some carbonaceous gangue type lead-zinc sulfide ore deposits, some carbonaceous materials with low density and strong natural floatability exist, and enter a foam layer in the flotation process to influence the grade of concentrate. In addition, the carbon materials have good adsorption effect, can adsorb the flotation collector in the ore pulp, and cause the increase of the medicament consumption and the increase of the production cost. The exploration and research of the high-efficiency flotation method of the lead-zinc sulfide ore has important significance for promoting the mineral processing technology of the lead-zinc sulfide ore and improving the resource utilization level of the carbon-containing lead-zinc sulfide ore.
Disclosure of Invention
Aiming at the technical problem that the mineral containing carbonaceous gangue is difficult to inhibit during the flotation of lead-zinc sulfide ore in the prior art, the invention aims to provide a beneficiation method of the carbonaceous lead-zinc sulfide ore so as to realize the separation of the lead-zinc sulfide ore and the carbonaceous gangue.
The invention provides a beneficiation method for carbon-containing lead-zinc sulfide ores, which comprises the following steps:
(1) grinding the raw ore to obtain ore pulp with preset fineness;
(2) adding a carbon inhibitor into the ore pulp after ore grinding, and uniformly stirring to obtain the ore pulp after size mixing;
(3) adding a collecting agent and a foaming agent into the pulp after size mixing to perform lead flotation to obtain lead concentrate and lead flotation tailings;
(4) adding a carbon inhibitor into the lead flotation tailings, and performing zinc flotation to obtain zinc concentrate and tailings;
the structural formula of the carbon inhibitor is as follows:
wherein R is an oxygen-containing hydrophilic group, and the value of n is 4-10.
In a preferred embodiment, the number of C atoms in the R group is 0 to 2.
In a preferred embodiment, R is any one of a sulfonic acid group and a carboxymethyl group.
Preferably, the carbon inhibitor has one or more of the following structural formulas:
the carbon inhibitor provided by the invention takes nonylphenol as a carbon-philic group and takes polyoxyethylene ether and sulfonic acid group/carboxymethyl as hydrophilic groups, and when the carbonaceous lead-zinc sulfide ore is floated, the carbon inhibitor can effectively inhibit the flotation of carbon, reduce the consumption of carbon impurities on a collecting agent, reduce the carbon content in a concentrate product, and is beneficial to improving the beneficiation index of the concentrate.
Preferably, in the step (1), the raw ore is ground to-0.074 mm, which accounts for more than 80%.
According to the preferable scheme, in the step (2), 50-150 g/t of carbon inhibitor and 3000-4000 g/t of lime are added and stirred for 1-5 min to obtain the pulp after size mixing.
More preferably, the dosage of the carbon inhibitor is 50-100 g/t.
According to the preferable scheme, in the step (3), 50-60 g/t of mixed collecting agent and 20-40 g/t of No. 2 oil are added for lead roughing, lead concentrate is obtained by performing two-time concentration on the lead roughing concentrate, and lead flotation tailings are obtained by performing one-time scavenging.
In a more preferable scheme, the mass ratio of the ethyl sulfur nitrogen: xanthate 1:1 as mixed collector.
According to the preferable scheme, in the step (4), 50-100 g/t of carbon inhibitor, 500-1500 g/t of lime, 100-200 g/t of copper sulfate, 10-30 g/t of mixed collecting agent and 5-20 g/t of No. 2 oil are added into lead flotation tailings, and zinc concentrate and tailings are obtained through one roughing, two concentrating and one scavenging.
The term "g/t" used in the present invention refers to the addition amount of the chemical agent relative to the raw ore, for example, the amount of the carbon inhibitor is 100g/t, which means that 100g of the carbon inhibitor needs to be added to treat one ton of the raw ore.
The carbon inhibitor designed by the invention has a carbon surface mainly composed of aromatic rings, wherein the carbon-philic group of the inhibitor is a large molecular plane structure of nonylphenol, and can be mutually attracted with the aromatic group on the carbon surface in gangue through pi-pi accumulation to be anchored on the surface of the inhibitor; the nonylphenol-polyoxyethylene ether structure is connected with sulfonic acid group/carboxymethyl, so that when the whole molecule forms micelle, a 'cavity group' is spontaneously formed to wrap carbon in an inner micelle layer or form a hydrophilic chain to cover the surface of the carbon.
When the inhibitor is adsorbed on the carbonaceous surface, ionization of the sulfonic acid/carboxymethyl groups in the inhibitor causes carbonaceous particles to take a negative charge, forming a diffused electric double layer around the particles. When two carbonaceous particles with the same charge are close to each other, electrostatic repulsion generated by overlapping of double diffusion electric layers forces the charged carbonaceous particles to be separated from each other, so that the charged carbonaceous particles are prevented from being combined, and the dispersion of the carbon in the ore pulp is promoted. In addition, the negative charge of the carbon surface can also effectively hinder the adsorption of the anion collecting agent on the carbon surface through electrostatic repulsion, thereby enhancing the inhibiting effect on the carbon particles.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention provides a beneficiation method for carbon-containing lead-zinc sulfide ores, wherein hydrophilic polyoxyethylene ether and sulfonic group/carboxymethyl are adopted in a carbon inhibitor structure, and after the inhibitor is adsorbed on the surfaces of carbonaceous particles, the polyoxyethylene ether and the sulfonic group/carboxymethyl end extend into an aqueous solution, so that a hydrophilic three-dimensional adsorption layer with a certain thickness is formed on the surfaces of the adsorbed carbonaceous particles. When the carbon particles are close to each other, the adsorption layers begin to overlap, namely, steric hindrance is generated among the carbonaceous particles, the more the carbon particles are overlapped, the larger the steric hindrance repulsive force is, the larger the obstruction to the coagulation among the carbonaceous particles is, and therefore the carbonaceous particles in the ore pulp solution are well dispersed. Meanwhile, the stable solvated water film has great steric hindrance repulsion and strong hydrophilicity, so that the collector is more difficult to approach to the carbonaceous surface. This ensures both sufficient suppression of carbonaceous impurities and greatly reduces collector consumption due to carbonaceous adsorption.
The invention provides a beneficiation method of carbon-containing lead sulfide zinc ore, the adopted inhibitor has a high-selectivity inhibition effect, can efficiently selectively inhibit carbon-containing impurities in the flotation of lead sulfide and zinc, and is convenient for realizing the efficient enrichment and recovery of lead sulfide and zinc.
Drawings
FIG. 1 is a process flow diagram of the flotation process of example 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
The invention is further described with reference to the following figures and specific examples.
Examples 1 to 3
The method adopts certain carbon-containing lead-zinc ores of inner Mongolia, wherein the main metal minerals are sphalerite, galena and pyrite, the zinc grade is 5.28 percent, the lead grade is 2.23 percent, and the iron grade is 8.3 percent. The content of other metal minerals is low. The gangue minerals mainly comprise dolomite, calcite, organic carbon and the like. The carbon content in the ore reaches 4.75 percent. The ore has complex properties, the lead and zinc have close symbiotic relationship, the useful minerals of lead and zinc have close relationship with carbon, and the ore contains a large amount of organic carbon. The carbon floatability is good, and if the lead and the zinc are directly floated in the flotation process, the carbon must enter lead concentrate and zinc concentrate to influence the concentrate grade, so the key point for solving the ore flotation is to effectively separate galena, zinc blende and organic carbon.
The invention discloses a beneficiation method of carbon-containing lead-zinc sulfide ore, which comprises the following steps as shown in figure 1:
(1) grinding: grinding the raw ore to a fineness of 85% of-0.074 mm;
(2) size mixing: adding 100g/t of carbon inhibitor and 3500g/t of lime, and stirring for 3min to obtain pulp after size mixing;
(3) lead flotation: adding 55g/t of mixed collecting agent (ethionam: xanthate: 1) and 30g/t of No. 2 oil foaming agent to perform lead roughing; carrying out two-time concentration on the flotation lead rough concentrate to obtain lead concentrate; lead flotation tailings are obtained through primary scavenging;
(4) zinc flotation: adding 50g/t of carbon inhibitor, 1000g/t of lime, 150g/t of copper sulfate, 20g/t of mixed collector and 10g/t of No. 2 oil into the lead flotation tailings, and performing primary roughing, secondary fine concentration and primary scavenging to obtain zinc concentrate and tailings.
Comparative example 1
Flotation results obtained by flotation tests using conventional iron-chromium salt lignin as a carbon inhibitor according to the above procedure and agent amounts are shown in table 1.
TABLE 1 flotation results
As can be seen from Table 1, compared with the conventional iron-chromium salt lignin, the lead concentrate and zinc concentrate have higher grade and recovery rate, and the high-efficiency inhibitor can well inhibit the floating of carbon and is beneficial to the flotation and collection of lead-zinc sulfide ore.
Claims (9)
1. The beneficiation method of the carbon-containing lead-zinc sulfide ore is characterized by comprising the following steps:
(1) grinding the raw ore to obtain ore pulp with preset fineness;
(2) adding a carbon inhibitor into the ore pulp after ore grinding, and uniformly stirring to obtain the ore pulp after size mixing;
(3) adding a collecting agent and a foaming agent into the pulp after size mixing to perform lead flotation to obtain lead concentrate and lead flotation tailings;
(4) adding a carbon inhibitor into the lead flotation tailings, and performing zinc flotation to obtain zinc concentrate and tailings;
the structural formula of the carbon inhibitor is as follows:
wherein R is an oxygen-containing hydrophilic group, and the value of n is 4-10;
and R is sulfonic acid group, carboxymethyl, sulfonic sodium, sulfonic ethyl sodium or carboxymethyl sodium.
2. The method for beneficiation of carbon-containing lead-zinc sulfide ores according to claim 1, wherein the number of C atoms in the R group is 0 to 2.
3. The method for beneficiating carbonaceous lead zinc sulfide ores according to claim 1 or claim 2, wherein the carbon inhibitor has one or more of the following structural formulas:
4. the method for beneficiating lead and zinc sulfide ores containing carbon according to claim 1, wherein in the step (1), the raw ores are ground to-0.074 mm which accounts for more than 80%.
5. The beneficiation method for the carbon-containing lead-zinc sulfide ore according to claim 1, characterized in that in the step (2), 50-150 g/t of a carbon inhibitor and 3000-4000 g/t of lime are added and stirred for 1-5 min to obtain the pulp after size mixing.
6. The method for beneficiation of carbon-containing lead-zinc sulfide ores according to claim 5, wherein the amount of the carbon inhibitor is 50-100 g/t.
7. The beneficiation method for the carbon-containing lead-zinc sulfide ore according to claim 1, characterized in that in the step (3), 50-60 g/t of mixed collecting agent and 20-40 g/t of No. 2 oil are added to perform lead roughing, lead concentrate is obtained after twice fine concentration of the flotation lead rough concentrate, and lead flotation tailings are obtained after once scavenging of the flotation lead rough concentrate.
8. The beneficiation method for the carbon-containing lead-zinc sulfide ore according to claim 7, characterized in that ethyl-sulfur-nitrogen and xanthate with a mass ratio of 1:1 are adopted as mixed collectors.
9. The beneficiation method for the carbon-containing lead-zinc sulfide ore according to claim 1, characterized in that in the step (4), 50-100 g/t of a carbon inhibitor, 500-1500 g/t of lime, 100-200 g/t of copper sulfate, 10-30 g/t of a mixed collector and 5-20 g/t of No. 2 oil are added into lead flotation tailings, and zinc concentrate and tailings are obtained through once roughing, twice fine concentration and once scavenging.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5243477B2 (en) * | 1974-03-20 | 1977-10-31 | ||
| OA06199A (en) * | 1981-05-13 | 1981-06-30 | Berol Kemi Ab | Process for the flotation of phosphate minerals and a compound intended for this process. |
| SK53294A3 (en) * | 1993-05-07 | 1995-04-12 | Albright & Wilson | Concentrated aqueous mixture containing surface active matter and its use |
| CA2332243A1 (en) * | 1998-06-04 | 1999-12-09 | Ricardo Arancibia Cifuentes | Heap leach agglomeration/percolation extraction aids for enhanced gold and silver recovery |
| CN101972709B (en) * | 2010-10-27 | 2012-02-01 | 广西地博矿业集团股份有限公司 | Floatation method of carbon containing lead zinc ore and carbon removal inhibitor thereof |
| CN103623919A (en) * | 2013-12-11 | 2014-03-12 | 广西大学 | Ore dressing method for lead, zinc and antimony ore containing carbon |
| CN106975573B (en) * | 2017-03-13 | 2018-08-21 | 中南大学 | Carbon inhibitor and its application in a kind of copper-sulphide ores floatation process |
| CN106861918B (en) * | 2017-03-13 | 2019-04-19 | 中南大学 | A kind of flotation carbon inhibitor and its application |
| CN109589272A (en) * | 2019-01-10 | 2019-04-09 | 广州澳特朗生物技术有限公司 | The new opplication of cationic surfactant and support fluorescence cosmetics |
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