CN111974539B - Method for improving quality and reducing impurities of tin concentrate - Google Patents
Method for improving quality and reducing impurities of tin concentrate Download PDFInfo
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- CN111974539B CN111974539B CN202010855759.3A CN202010855759A CN111974539B CN 111974539 B CN111974539 B CN 111974539B CN 202010855759 A CN202010855759 A CN 202010855759A CN 111974539 B CN111974539 B CN 111974539B
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Abstract
The invention discloses a method for improving quality and reducing impurities of tin concentrate, which comprises the steps of carrying out pre-desulfurization flotation on tin concentrate to obtain desulfurization concentrate and desulfurization tailings, carrying out table concentrator gravity separation on the desulfurization tailings to obtain gravity tin concentrate, tin middling and tailings, discarding tailings, concentrating the gravity tin concentrate to obtain concentrated settled sand and overflow, carrying out manual float bath ore washing on the concentrated settled sand to obtain manual float bath ore washing concentrate and tailings, carrying out secondary desulfurization flotation on the manual float bath ore washing tailings to obtain desulfurization flotation concentrate and tailings, carrying out tin flotation on the desulfurization flotation tailings to obtain flotation tin concentrate and tailings, combining the pre-desulfurization concentrate and the secondary desulfurization concentrate into sulfur concentrate, combining the manual float bath ore washing concentrate and the tin flotation concentrate into final high-grade tin concentrate, obtaining high-grade tin concentrate by a gravity-flotation combined and manual float bath ore washing method, and simultaneously separating out a byproduct sulfur concentrate, and the economic benefit of enterprises is improved.
Description
Technical Field
The invention relates to a method for improving quality and reducing impurities of tin concentrate, belonging to the technical field of mineral processing.
Background
The symbol of Tin (Tin) is Sn, which is positioned at the fourteenth position of the fifth period in the periodic table of elements, the atomic number is 50, and the atomic weight is 118.71. Tin is one of the long-standing metals, in the summer of 2000 b.c., tin and copper were used for producing copper-tin alloy bronze ware, and metallic tin was also used for manufacturing tin candlesticks, tin pots, tin cups, etc. Tin has excellent performances of low melting point, no toxicity, difficult oxidation, corrosion resistance, good plasticity, beautiful appearance and the like, so that tin is widely applied to various industries of military and politics from ancient times to modern industrial society.
Cassiterite is the main type of tin-containing mineral, has a chemical composition of SnO2, theoretically contains Sn78.8%, contains O21.2%, has Mohs hardness of 6-7 and specific gravity of 6.8-7.2, belongs to a tetragonal system, has a rutile structure, and has a shape mainly related to impurities, formation temperature and crystallization speed. The cassiterite is a colorless transparent solid, is generally brown or yellowish brown due to impurities, tin in nature is in a stable state at normal temperature, and a layer of oxide film is arranged on the surface of the cassiterite to prevent the tin from being further oxidized.
At present, the reserves and reserves of tin resources are proved to be the first in China, five major ore deposits such as cassiterite, cassiterite-sulfide, cassiterite pegmatite, cassiterite-quartzite, cassiterite sand and the like are mainly used, wherein the primary tin deposit accounts for 78% of the total reserve of the tin ore, the sand tin accounts for 22% of the total reserve of the tin ore, and the former ore deposits of Yunnan old cassiterite and sulfide ore deposits of Guangxi major factories are represented, wherein the former ore deposits of Yunnan are called 'tin city'.
Chinese patent CN202921415U discloses a combined device for improving quality and reducing impurities of tin concentrate of cassiterite multi-metal sulfide ore, which is characterized in that firstly, tin rough concentrate is concentrated to the water content of 35-40%, sulfuric acid is added to remove oxide films on the surfaces of pyrite, and then collecting agent and foaming agent are added to carry out size mixing and stirring; and obtaining tin concentrate and sulfur concentrate through two-fine and two-sweep, carrying out closed circuit grinding grading on the sulfur concentrate until the minus 0.045mm size fraction accounts for 80%, and then carrying out one-coarse and two-sweep to obtain the final sulfur concentrate and tin-rich middling. However, the method only adopts one-time concentration to cause partial fine tin concentrate to run along with overflow, and meanwhile, the increase of closed circuit grinding grading causes a series of great increases in cost such as equipment loss, electric quantity consumption, management and maintenance and the like, and is not beneficial to the synergistic and beneficial development of mine enterprises.
Chinese patent CN107890946B discloses a beneficiation method of fine cassiterite and chinese patent CN109967259A discloses a method for recovering fine cassiterite, which is characterized in that the cassiterite separation efficiency is high, the production management cost is low, and both methods can obtain higher recovery rate. However, the method is adopted to obtain higher recovery rate and inevitably cause the grade of the tin concentrate to be lower, and the invention provides an economic and feasible method for improving the grade of the final tin concentrate by the tin concentrate.
Disclosure of Invention
The invention aims to provide a method for improving the quality and reducing impurities of tin concentrate, which is characterized in that floating gravity is combined with desulfurization and impurity removal, a high-grade tin concentrate is obtained by adopting an artificial ore washing method, a byproduct sulfur concentrate is separated, a cassiterite ore dressing plant with higher sulfur and mud content has high cassiterite recovery difficulty, and the grade of the tin concentrate is generally low in order to ensure the recovery rate index.
The technical scheme of the invention is as follows, and the method for improving the quality and reducing the impurities of the tin concentrate comprises the following specific steps:
(1) carrying out pre-desulfurization flotation on low-grade tin concentrate to obtain desulfurization concentrate I and desulfurization tailings I;
(2) carrying out table reselection on the desulfurization tailings I obtained in the step (1) to obtain reselected tin concentrate, tin middlings and tailings, and discarding tailings;
(3) concentrating the gravity concentration tin concentrate obtained in the step (2) to obtain concentrated settled sand and overflow, and performing overflow tailing discarding;
(4) carrying out artificial float bath ore washing on the concentrated settled sand in the step (3) to obtain artificial float bath ore washing concentrate and tailings;
(5) performing secondary desulfurization flotation on the artificial float bath ore washing tailings obtained in the step (4) to obtain secondary desulfurization flotation concentrate II and secondary desulfurization tailings II;
(6) performing tin flotation on the secondary desulfurization flotation tailings II in the step (5) to obtain tin flotation concentrates and tailings, and discarding tailings;
(7) combining the desulfurized concentrate I obtained in the step (1) and the secondary desulfurized flotation concentrate II obtained in the step (5) into sulfur concentrate;
(8) and (3) combining the artificial float bath ore washing concentrate in the step (4) and the tin flotation concentrate in the step (6) into final high-grade tin concentrate, reselecting the table middlings to serve as final tin middlings, and then combining the table tailings in the step (2), the concentration overflow in the step (3) and the tin flotation tailings in the step (6) into final tailings.
The low-grade tin concentrate of the invention contains 5-15% of tin, and the obtained high-grade tin concentrate contains 45-55% of tin.
And (3) concentrating by adopting a concentrating hopper, wherein the water content of the concentrated settled sand is 10-20%.
The artificial float bath ore washing in the step (4) uses an artificial float bath, during ore washing, the chemical agents are added, namely sodium butyl xanthate as a collecting agent and sulfuric acid as an activating agent, the bottom of the artificial float bath is inclined, ore pulp is flatly laid on the top of the inclined part and then washed by washing water, sulfide ore and minerals with light specific gravity come off from the surface, tin minerals are piled at the bottom of an inclined angle, and the inclined angle of the float bath of the artificial float bath is 30-35 degrees.
The reagents used in the pre-desulfurization flotation and the secondary desulfurization flotation are as follows: activating agent sulfuric acid, collecting agent butyl sodium xanthate and foaming agent terpineol oil.
The tin flotation inhibitor is prepared from 150-160g/t of carboxymethyl cellulose and sodium fluosilicate according to the proportion of 1:1, the collecting agent is prepared from 800-1200g/t of salicylhydroxamic acid (SHA) and Styrene Phosphonic Acid (SPA) according to the proportion of 1:2, the auxiliary collecting agent is tributyl phosphate (TBP) is 75-85g/t, and the foaming agent is terpineol oil 60-80 g/t. The medicament principle is as follows: the carboxymethyl cellulose can inhibit calcium-containing minerals such as calcite, fluorite and the like, and the sodium fluosilicate has strong inhibition effect on topaz, tantalite, tourmaline and the like according to the proportion of 1: the combined inhibitor prepared according to the proportion of 1 enhances the inhibiting effect on the gangue minerals and simultaneously enlarges the separation PH range of the cassiterite and the gangue minerals. The salicylhydroxamic acid (SHA) has strong selectivity but high cost, and the Styrene Phosphonic Acid (SPA) has good collecting performance but is easy to accept Ca2+By 1:2, the combined collecting agent can obtain better selectivity, and the collecting performance index generates positive synergistic effect, and meanwhile, the auxiliary collecting agent tributyl phosphate (TBP) is added to generate laminated co-adsorption on the surface of a chelate formed by the combined collecting agent and the cassiterite, so that the surface hydrophobic capacity of the cassiterite mineral is improved, the medicament consumption of the combined collecting agent is greatly reduced, and the flotation index of the combined collecting agent is improved.
The method comprises the steps of carrying out pre-desulfurization flotation on tin concentrate to obtain desulfurization concentrate and desulfurization tailings; performing table concentrator reselection on the desulfurized tailings to obtain reselected tin concentrate, tin middlings and tailings, and discarding tailings; concentrating gravity tin concentrate to obtain concentrated settled sand and overflow, and performing overflow tailing discarding; carrying out artificial float bath ore washing on the concentrated settled sand to obtain artificial float bath ore washing concentrate and tailings, and then carrying out secondary desulfurization flotation on the artificial float bath ore washing tailings to obtain desulfurization flotation concentrate and tailings; performing tin flotation on the desulfurization flotation tailings to obtain flotation tin concentrate and tailings; combining the pre-desulfurized concentrate and the secondary desulfurized concentrate into a sulfur concentrate; and combining the artificial float bath ore washing concentrate and the tin flotation concentrate into final high-grade tin concentrate, taking the table middling as final tin middling, and combining the table tailings, the concentration overflow and the flotation tailings into final tailings.
The invention has the beneficial effects that:
1. the invention adopts the manual float bath ore washing method, can make adjustment according to the sulfur-containing mud content in the tin concentrate in the ore washing process, is convenient for adjusting the size of washing water, is beneficial to controlling the dosage of a medicament and the quality of the concentrate, and greatly improves the grade of the tin concentrate.
2. The method separates the by-product sulfur concentrate from the low-grade tin concentrate, has high tin concentrate grade, and is suitable for most low-grade tin concentrate mines to improve the final tin concentrate grade.
3. The invention adopts the combination of float-gravity and pre-desulfurization flotation and table reselection to pre-treat the low-grade tin concentrate, removes most gangue minerals such as sulfur-containing mud and the like, avoids the interference of adverse factors on subsequent procedures, and also reduces the treatment capacity of manual float bath ore washing.
4. The invention carries out the re-desulfurization of the tailings washed by the artificial floating slot, not only recovers the sulfur concentrate in the tailings, but also creates favorable conditions for the tin flotation.
5. The tin flotation can effectively separate cassiterite from various gangue minerals such as calcite, fluorite, pyroxene and the like by a combined medicine mode, and obtains better flotation indexes with selectivity and collecting performance.
6. The invention improves the grade of tin concentrate containing 5-15% of tin to 45-55% of tin, the market price of tin concentrate is 8-10 ten thousand yuan/ton, and the market price of high-grade tin concentrate is 12-14 ten thousand yuan/ton, thereby increasing the benefit for mine enterprises.
Drawings
FIG. 1 is a schematic view of a process flow for improving quality and reducing impurities of tin concentrate according to the invention;
FIG. 2 is a schematic view of the structure of an artificial float bath for ore washing of the artificial float bath of the invention.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, which are only for describing the present invention specifically, and the scope of the present invention is not limited to the contents.
Example 1: the research is carried out by adopting tin concentrate of a certain concentrating mill in Yunnan Shanshan, the grade of tin is 5.36 percent, and gangue minerals mainly comprise calcite, talcum, topaz and the like, and the specific operation is as follows as shown in figure 1:
(1) concentrating and size-mixing low-grade tin concentrate of a certain concentrating plant in Yunnan Wenshan with the liquid-solid ratio of the slurry being 25%, sequentially adding 600g/t of activating agent sulfuric acid, 40g/t of collecting agent butyl sodium xanthate and 40g/t of foaming agent pine oil, and performing pre-desulfurization flotation to obtain desulfurization concentrate I and desulfurization tailings I;
(2) carrying out table reselection on the desulfurization tailings I obtained in the step (1) to obtain reselected tin concentrate, tin middlings and tailings, and discarding tailings;
(3) concentrating the gravity concentration tin concentrate obtained in the step (2) to obtain concentrated settled sand and overflow, wherein the water content of the settled sand is 10%, and the overflow is discarded;
(4) carrying out artificial float bath ore washing on the concentrated settled sand in the step (3), adding reagents including collecting agents including butyl sodium xanthate and activating agent sulfuric acid as shown in figure 2, adding drugs, mixing slurry, stirring, paving on the top of an inclined part of the float bath, carrying out rinsing by using rinsing water, enabling sulfide ore and minerals with low specific gravity to come down from the surface, enabling tin minerals to be piled at the bottom of an inclined angle, and enabling the inclined angle of the float bath of the artificial float bath to be 30-35 degrees to obtain ore washing concentrate and tailings of the artificial float bath;
(5) concentrating and size-mixing the tailings washed by the artificial float bath in the step (4), wherein the liquid-solid ratio of the ore pulp is 20%, sequentially adding 400g/t of activating agent sulfuric acid, 20g/t of collecting agent butyl sodium xanthate and 20g/t of foaming agent pine oil, and performing secondary desulfurization flotation to obtain secondary desulfurization concentrate II and secondary desulfurization tailings II;
(6) performing tin flotation on the secondary desulfurization flotation tailings II in the step (5), adding an inhibitor according to the ratio of 1:1 of carboxymethyl cellulose to sodium fluosilicate to modulate the dosage to be 150g/t, adding a collecting agent according to the ratio of 1:2 of salicylhydroxamic acid (SHA) to Styrene Phosphonic Acid (SPA) to modulate the dosage to be 800g/t, using an auxiliary collecting agent of tributyl phosphate (TBP) to modulate the dosage to be 75g/t, using pine oil as a foaming agent to be 60g/t, obtaining tin flotation concentrate and tailings, and discarding tailings;
(7) combining the desulfurized concentrate I obtained in the step (1) and the secondary desulfurized flotation concentrate II obtained in the step (5) into a sulfur concentrate with the grade of 31.97%;
(8) and (3) merging the artificial float bath ore washing concentrate in the step (4) and the tin flotation concentrate in the step (6) to obtain final tin concentrate with the grade of 46.93%, reselecting the table concentrator middlings to serve as the final tin middlings containing 10.06% of tin, and merging the table concentrator tailings in the step (2), the concentration overflow in the step (3) and the tin flotation tailings in the step (6) into final tailings.
The method improves the grade of the final tin concentrate in a certain concentrating plant in Yunnan Shanshan to obtain the final tin concentrate with the final grade of 46.93 percent and the final tin middling with the final grade of 10.06 percent, and simultaneously obtains the final sulfur concentrate with the grade of 31.97 percent as a byproduct, thereby having better effect.
Example 2: the research is carried out by adopting the tin concentrate of a certain old cassiterite concentrating mill in Yunnan, the raw tin ore of the concentrating mill has higher sulfur and mud content, the tin concentrate contains 8.62 percent of tin after the raw ore is selected by the combined heavy magnetic suspension process, and gangue minerals are calcite, fluorite and the like, and as shown in figure 1, the concrete steps are as follows:
(1) concentrating and size-mixing low-grade tin concentrate of a certain old cassiterite concentrating mill in Yunnan, wherein the liquid-solid ratio of the ore slurry is 30%, sequentially adding 800g/t of activating agent sulfuric acid, 60g/t of collecting agent butyl sodium xanthate and 50g/t of foaming agent pine oil, and performing pre-desulfurization flotation to obtain desulfurization concentrate I and desulfurization tailings I;
(2) carrying out table reselection on the desulfurization tailings I obtained in the step (1) to obtain reselected tin concentrate, tin middlings and tailings, and discarding tailings;
(3) concentrating the gravity concentration tin concentrate obtained in the step (2) to obtain concentrated settled sand and overflow, wherein the water content of the settled sand is 15%, and the overflow is discarded;
(4) and (3) carrying out artificial float bath ore washing on the concentrated settled sand in the step (3), adding reagents comprising sodium butyl xanthate as a collecting agent and sulfuric acid as an activating agent, adding chemicals, mixing the slurry, stirring, paving, and then carrying out drip washing by using washing water, wherein the inclination angle of the float bath is 30-35oTo obtain ore washing concentrate and tailings of the artificial floating trough;
(5) concentrating and size-mixing the tailings washed by the artificial float bath in the step (4) until the liquid-solid ratio of the ore pulp is 25%, sequentially adding 600g/t of activating agent sulfuric acid, 40g/t of collecting agent butyl sodium xanthate and 30g/t of foaming agent pine oil, and performing secondary desulfurization flotation to obtain secondary desulfurization concentrate II and secondary desulfurization tailings II;
(6) performing tin flotation on the secondary desulfurization flotation tailings II in the step (5), adding an inhibitor according to the ratio of 1:1 of carboxymethyl cellulose to sodium fluosilicate to prepare 155g/t, adding a collecting agent according to the ratio of 1:2 of salicylhydroxamic acid (SHA) to Styrene Phosphonic Acid (SPA) to prepare 1000g/t, adding an auxiliary collecting agent of tributyl phosphate (TBP) to prepare 80g/t, and adding a foaming agent of terpineol oil to prepare tin flotation concentrate and tailings, wherein the tailings are discarded;
(7) combining the desulfurized concentrate I obtained in the step (1) and the secondary desulfurized flotation concentrate II obtained in the step (5) into a sulfur concentrate with the grade of 34.18%;
(8) and (3) merging the artificial float bath ore washing concentrate in the step (4) and the tin flotation concentrate in the step (6) to obtain final tin concentrate with the grade of 49.54%, reselecting the table middlings to serve as the final tin middlings containing 13.86% of tin, and merging the table tailings in the step (2), the concentration overflow in the step (3) and the tin flotation tailings in the step (6) into final tailings.
The method improves the grade of the final tin concentrate in the old cassiterite concentrating mill in Yunnan province, obtains the final tin concentrate with the final grade of 49.54 percent and the final tin middling with the final grade of 13.86 percent, and simultaneously obtains the final sulfur concentrate with the grade of 34.18 percent as a byproduct, thereby having better effect.
Example 3: the research is carried out by adopting tin concentrate of a certain cassiterite concentrating mill in Guangxi, the grade of tin is 12.11 percent, gangue minerals mainly comprise fluorite and pyroxene, and as shown in figure 1, the concrete operation is as follows:
(1) concentrating and size-mixing low-grade tin concentrate of a cassiterite concentrating mill in Guangxi, wherein the liquid-solid ratio of the ore pulp is 35%, sequentially adding 1000g/t of activating agent sulfuric acid, 80g/t of collecting agent butyl sodium xanthate and 60g/t of foaming agent pine oil, and performing pre-desulfurization flotation to obtain desulfurization concentrate I and desulfurization tailings I;
(2) carrying out table reselection on the desulfurization tailings I obtained in the step (1) to obtain reselected tin concentrate, tin middlings and tailings, and discarding tailings;
(3) concentrating the gravity concentration tin concentrate obtained in the step (2) to obtain concentrated settled sand and overflow, wherein the water content of the settled sand is 20%, and the overflow is discarded;
(4) and (3) carrying out artificial float bath ore washing on the concentrated settled sand in the step (3), adding reagents comprising sodium butyl xanthate as a collecting agent and sulfuric acid as an activating agent, adding chemicals, mixing the slurry, stirring, paving, and then carrying out drip washing by using washing water, wherein the inclination angle of the float bath is 30-35oTo obtain ore washing concentrate and tailings of the artificial floating trough;
(5) concentrating and size-mixing the tailings washed by the artificial float bath in the step (4) until the liquid-solid ratio of the ore pulp is 30%, sequentially adding 800g/t of activating agent sulfuric acid, 60g/t of collecting agent butyl sodium xanthate and 40g/t of foaming agent pine oil, and performing secondary desulfurization flotation to obtain secondary desulfurization concentrate II and secondary desulfurization tailings II;
(6) performing tin flotation on the secondary desulfurization flotation tailings II in the step (5), adding an inhibitor according to the ratio of 1:1 of carboxymethyl cellulose to sodium fluosilicate to prepare 160g/t, adding a collecting agent according to the ratio of 1:2 of salicylhydroxamic acid (SHA) to Styrene Phosphonic Acid (SPA) to prepare 1200g/t, adding an auxiliary collecting agent of tributyl phosphate (TBP) to prepare 85g/t, and adding a foaming agent of terpineol oil to prepare 85g/t, so as to obtain tin flotation concentrate and tailings, wherein the tailings are discarded;
(7) combining the desulfurized concentrate I obtained in the step (1) and the secondary desulfurized flotation concentrate II obtained in the step (5) into sulfur concentrate with the grade of 38.62%;
(8) and (3) merging the artificial float bath ore washing concentrate in the step (4) and the tin flotation concentrate in the step (6) to obtain final tin concentrate with the grade of 52.37%, reselecting the table concentrator middlings to serve as the final tin middlings containing 18.33% of tin, and merging the table concentrator tailings in the step (2), the concentration overflow in the step (3) and the tin flotation tailings in the step (6) into final tailings.
The method improves the grade of the final tin concentrate in a certain cassiterite concentrating plant in Guangxi province, obtains the final tin concentrate with the final grade of 52.37 percent and the final tin middling with the final grade of 18.33 percent, and simultaneously obtains the final sulfur concentrate with the grade of 38.62 percent as a byproduct, thereby having better effect.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A method for improving quality and reducing impurities of tin concentrate is characterized by comprising the following specific steps:
(1) carrying out pre-desulfurization flotation on low-grade tin concentrate to obtain desulfurization concentrate I and desulfurization tailings I;
(2) carrying out table reselection on the desulfurization tailings I obtained in the step (1) to obtain reselected tin concentrate, tin middlings and tailings, and discarding tailings;
(3) concentrating the gravity concentration tin concentrate obtained in the step (2) to obtain concentrated settled sand and overflow, and performing overflow tailing discarding;
(4) carrying out artificial float bath ore washing on the concentrated settled sand in the step (3) to obtain artificial float bath ore washing concentrate and tailings;
(5) performing secondary desulfurization flotation on the artificial float bath ore washing tailings obtained in the step (4) to obtain secondary desulfurization flotation concentrate II and secondary desulfurization tailings II;
(6) performing tin flotation on the secondary desulfurization flotation tailings II in the step (5) to obtain tin flotation concentrate and tailings;
(7) combining the desulfurized concentrate I obtained in the step (1) and the secondary desulfurized flotation concentrate II obtained in the step (5) into sulfur concentrate;
(8) and (3) combining the artificial float bath ore washing concentrate in the step (4) and the tin flotation concentrate in the step (6) into final high-grade tin concentrate, reselecting the table middlings to serve as final tin middlings, and then combining the table tailings in the step (2), the concentration overflow in the step (3) and the tin flotation tailings in the step (6) into final tailings.
2. The method for improving the quality and reducing the impurities of the tin concentrate according to claim 1, characterized by comprising the following steps of: the tin content of the low-grade tin concentrate is 5-15%, and the tin content of the obtained high-grade tin concentrate is 45-55%.
3. The method for improving the quality and reducing the impurities of the tin concentrate according to claim 1, characterized by comprising the following steps of: and (3) concentrating by adopting a concentrating hopper, wherein the water content of the concentrated settled sand is 10-20%.
4. The method for improving the quality and reducing the impurities of the tin concentrate according to claim 1, characterized by comprising the following steps of: and (4) using an artificial floating trough for ore washing of the artificial floating trough in the step (4), adding medicaments, namely collecting agents of butyl sodium xanthate and activating agent sulfuric acid, mixing the slurry and stirring, spreading the slurry, and leaching the slurry by using washing water, wherein the inclination angle of the floating trough of the artificial floating trough is 30-35 degrees.
5. The method for improving the quality and reducing the impurities of the tin concentrate according to claim 1, characterized by comprising the following steps of: the reagents used in the pre-desulfurization flotation and the secondary desulfurization flotation are as follows: activating agent sulfuric acid, collecting agent butyl sodium xanthate and foaming agent terpineol oil.
6. The method for improving the quality and reducing the impurities of the tin concentrate according to claim 1, characterized by comprising the following steps of: and (6) adding an inhibitor, a collector and an auxiliary collector into tin flotation, wherein the inhibitor is prepared by 1:1 ratio of carboxymethyl cellulose and sodium fluosilicate, the using amount of the inhibitor is 150-160g/t, the collector is prepared by 1:2 ratio of salicylhydroxamic acid and styrene phosphonic acid, the using amount of the collector is 800-1200g/t, the auxiliary collector is tributyl phosphate, the using amount of the auxiliary collector is 75-85g/t, and the foaming agent is 60-80g/t of pine oil.
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| CN101629236A (en) * | 2009-02-26 | 2010-01-20 | 中国瑞林工程技术有限公司 | Desulfurizing process of sulfur compounds of rough grain tungsten and rough ore concentrate |
| CN101884951B (en) * | 2010-06-23 | 2012-11-28 | 广西华锡集团股份有限公司车河选矿厂 | Combined mineral dressing technology of fine grain and micro grain cassiterite |
| CN102872970A (en) * | 2012-10-29 | 2013-01-16 | 云南华联锌铟股份有限公司 | Process for improving quality and reducing impurities of tin stone multi-metal sulfide ore tin ore concentrate and combined equipment |
| CN103551245B (en) * | 2013-11-25 | 2015-09-30 | 长沙有色冶金设计研究院有限公司 | Complex multi-metal micro fine particle sulphide ore is carried out to the beneficiation method of synthetical recovery |
| CN104190527B (en) * | 2014-07-16 | 2016-08-17 | 江西稀有稀土金属钨业集团有限公司 | The low-grade wolframite of a kind of sulfur-bearing or the selecting system of low-grade Tin concentrate |
| CN104722392A (en) * | 2015-03-10 | 2015-06-24 | 江西稀有金属钨业控股集团有限公司 | Mineral processing technology of recycling tin metal from high sulphide ore |
| CN205323969U (en) * | 2016-01-12 | 2016-06-22 | 云南华联锌铟股份有限公司 | From selecting equipment of retrieving low -grade marmatite and tin quarry thing in copper tailing |
| CN106513165A (en) * | 2016-12-29 | 2017-03-22 | 云南锡业股份有限公司卡房分公司 | Floatation and impurity removal method before tin backwashing and reselection operation of tin copper associated sulphide ore |
| CN107497607B (en) * | 2017-08-17 | 2019-06-21 | 北京矿冶研究总院 | Flotation method for micro-fine particle cassiterite |
| CN109847924B (en) * | 2019-03-07 | 2020-07-28 | 昆明理工大学 | Beneficiation method for coarse-grained cassiterite in tin-containing polymetallic sulfide ore |
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| CN111974539A (en) | 2020-11-24 |
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