44 results about "Cassiterite" patented technology

The application discloses a multi-metallic sand tin ore beneficiation process, adopts the equal floatation-mixed floatation-gravity separation backwater process, lead concentrate yield is 0.39%, lead grade is 16.62%, recovery rate is 15.93%; zinc concentrate yield is 1.08%, zinc grade is 39.32%, zinc recovery rate is 46.92%, the gravity separation indexes are as follows: tin concentrate yield is 0.39%, tin content is 40.57%, tin recovery rate is 51.66%; low-grade tin concentrate yield is 0.51%, tin content is 3.17%, tin recovery rate is 5.28%. The beneficiation process recovers lead, zinc and tin in the sand tin ore, has high beneficiation indexes and good beneficiation effect.

This invention discloses an efficient separation and beneficiation method for scheelite, wolframite, and cassiterite in a tungsten-tin mixed concentrate, comprising the following steps: (1) pre-treatment by grinding, flotation desulfurization, and weak magnetic separation to remove iron from the tungsten-tin mixed concentrate to obtain weak magnetic tailings; (2) concentration and drying of the weak magnetic tailings obtained in step (1) followed by electrostatic separation to obtain electrostatic concentrate and electrostatic tailings; (3) stirring and slurry conditioning of the electrostatic concentrate obtained in step (2) followed by strong magnetic separation to obtain strong magnetic concentrate and strong magnetic tailings; stirring and slurry conditioning of the electrostatic tailings obtained in step (2) followed by scheelite upgrading flotation to obtain scheelite concentrate and scheelite flotation tailings. Based on the differences in conductivity, magnetism, and flotation properties of scheelite, wolframite, and cassiterite, this invention employs a “cassiterite / wolframite electrostatic separation-wolframite / cassiterite strong magnetic separation-scheelite upgrading flotation” process to achieve efficient separation of wolframite, scheelite, and cassiterite.

The invention discloses a method for screening ore-contained rock masses in a tungsten-tin ore prospecting prospective area, and a tungsten-tin ore metallogenic specificity distinguishing system and a screening method are constructed on the basis of fusing rock ore total rock geochemical data, a partial fusion numerical simulation experiment, a Rayleigh shunt numerical simulation experiment and a crystal porridge body model. According to the method, through quantitative analysis of essential differences of the ore-containing rock mass, the lean ore rock mass and the non-ore-containing rock mass in the magma differentiation degree, rapid and accurate screening of the hidden mineralized rock mass in the prospecting distant view area is achieved, and the ore-containing rock mass with the most mineralization potential can be rapidly screened out from the non-ore-containing rock mass or the lean ore rock mass.

The invention relates to the technical field of mineral recycling, in particular to a beneficiation method for recycling fine cassiterite from tin-containing tailings. According to the beneficiation method for recycling the micro-fine cassiterite, through screening, spiral chute, table shaking and centrifugation combination and process optimization, efficient pre-enrichment of the micro-fine cassiterite can be achieved, and by throwing and removing slime in advance, the adverse effect of the slime on the subsequent beneficiation process is avoided from the source.

The invention discloses a beneficiation method for efficiently separating scheelite, wolframite and cassiterite in tungsten-tin bulk concentrate. The beneficiation method comprises the following steps that (1) the tungsten-tin bulk concentrate is firstly subjected to ore grinding, flotation desulfurization and magnetic separation iron removal, and iron-removed tailings are obtained; (2) performing scheelite normal-temperature flotation on the iron-removed tailings to obtain scheelite rough concentrate and scheelite flotation tailings; (3) the scheelite rough concentrate is subjected to flotation upgrading, scheelite upgraded rough concentrate is obtained, and wolframite and cassiterite are deeply inhibited in the flotation upgrading process; the scheelite quality-improved rough concentrate is subjected to quality-improved fine selection, and scheelite concentrate is obtained; (4) the scheelite flotation tailings are subjected to magnetic separation to achieve separation of wolframite and cassiterite, and wolframite concentrate and tin rough concentrate are obtained; and (5) gangue minerals are removed from the tin rough concentrate through electric separation, and tin concentrate is obtained. According to the beneficiation method, tungsten and tin resources can be efficiently and comprehensively recycled.

A polymetallic low-grade tin ore beneficiation process, comprising the following steps: 1) grinding; 2) classification; 3) magnetic separation: a first middling, a second rough concentrate, and a second middling are combined for wet magnetic separation to obtain magnetic tailings and a magnetic concentrate, a flotation agent is added to the magnetic tailings for conditioning, then flotation is performed to obtain a flotation concentrate and flotation tailings, and the flotation tailings are thickened, ground, and returned to a first-stage shaking table for re-beneficiation; 4) bulk flotation of sulfide minerals; and 5) re-beneficiation of a tin concentrate using a shaking table.

The invention relates to a combined separation and recovery process for low-grade associated tantalum-niobium-tin ores. The combined separation and recovery process comprises the following steps: feeding raw ores into a linear sieve for sieving; oversize products are fed into a first-section ball mill, and ore is discharged into a spiral classifier for classification; graded returned sand is returned to the second-stage ball mill for regrinding, graded overflow is fed into a weak magnetic roller, iron-removed non-magnetic ore pulp is fed into a high-frequency coarse screen, oversize products are fed into the second-stage ball mill for fine grinding, undersize products are fed into a hydrocyclone, and underflow of the hydrocyclone is fed into a first-stage distribution chute; second-section rough concentrate and first-section rough concentrate produced by second-section distribution are combined and fed into a high-frequency fine screen, oversize products are fed into a ball mill to be ground again, and undersize products are fed into a first-section high-gradient magnetic separator; feeding the non-magnetic product into a second-stage high-gradient magnetic separator, and reselecting the non-magnetic product generated by the second-stage high-gradient magnetic separator to obtain a tin concentrate product; and the first-section magnetic separation product and the second-section magnetic separation product are combined for reselection to obtain a tantalum-niobium concentrate product. According to the method, tantalum, niobium and tin in the extremely-low-grade tantalum-niobium-tin ore can be efficiently and comprehensively recycled.

The application discloses a beneficiation method of low-grade tin ore by using magnetic separation and flotation. The beneficiation method of low-grade tin ore by using magnetic separation and flotation comprises the following steps: step (1), crushing and grinding the low-grade tin ore, using water as a leaching agent, and separating by a wet magnetic separator to obtain magnetic minerals and magnetic tailings; step (2), drying the magnetic tailings after the magnetic separation, and then placing the tailings in a flotation agent to perform a flotation treatment to obtain flotation minerals and flotation tailings; step (3), concentrating the flotation tailings after the flotation treatment to obtain concentrated tailings; and step (4), smelting the concentrated tailings to finally obtain tin metal, sulfide, silicate, oxide and impurities. The application combines the magnetic separation and the flotation to improve the ore separation efficiency and the recovery rate, the water is used as a leaching liquid in the magnetic separation process to reduce the cost, and no new impurities are introduced, and the flotation agent can reduce the surface tension of the tin ore to improve the leaching rate.

The invention discloses a micro-fine particle cassiterite flotation combined inhibitor and a preparation method and application thereof, and belongs to the technical field of mineral processing flotation. The combined inhibitor is composed of sodium phosphinate, sodium alginate and DL-2-aminobutyric acid and can be used for the flotation process of micro-fine particle cassiterite, and excellent flotation indexes are obtained. The combined inhibitor can remarkably inhibit siliceous gangue minerals in micro-fine particle cassiterite flotation, efficient selective separation is achieved, through the synergistic effect of all the components, the combined inhibitor can greatly reduce the total agent dosage, and the combined inhibitor is easy to prepare, environmentally friendly and convenient to industrially store and implement. The method is of great significance in achieving efficient flotation separation and enrichment of micro-fine particle cassiterite and improving the comprehensive utilization rate of tin resources.

The invention provides a method for separating tantalum-niobium smelting slag. The method comprises the following steps of water leaching pretreatment, screening classification, cassiterite reselection and enrichment and high-strength magnetic separation of rare earth. Wherein in the water leaching pretreatment, tantalum-niobium smelting slag and water are mixed according to the liquid-solid ratio of (1-7): 1, stirring is performed at the temperature of 0-30 DEG C, and water leaching slag and filtrate are obtained through separation; and the particle size of the screening and grading is 38-74 microns. Soluble impurities are fully dissolved and separated through low-temperature water leaching, and interference of the soluble impurities on the follow-up sorting effect is avoided; the materials are split according to particle size differences in the screening and grading process, so that the coarse and fine particle materials are matched with optimal gravity separation equipment respectively, and density separation of cassiterite and rare earth ore can be achieved more easily; cassiterite extraction is achieved by means of density difference during reselection and enrichment of cassiterite, rare earth ore is accurately separated through high-strength magnetic separation by means of magnetic difference, and separation of all processes is more sufficient. In addition, the separation method is a physical beneficiation method and is low in cost, simple, environmentally friendly and friendly to the environment.

This invention discloses a method for the flotation recovery of fine-grained cassiterite embedded in coarse sand of tin-containing polymetallic tailings, relating to the field of mineral processing technology. It introduces microwave pretreatment technology into the recovery of fine-grained cassiterite embedded in coarse sand at the tailings dam head, employing a combined process of "microwave pretreatment-grinding-intense magnetic separation for iron removal-fine-grained cassiterite flotation" to improve cassiterite recovery efficiency. This method utilizes the differences in microwave absorption capacity between cassiterite, iron-bearing minerals, and gangue to generate selective thermal stress and microcracks at the mineral interface, achieving efficient and selective dissociation of cassiterite from the intergrowth of iron-bearing minerals and gangue. Intensive magnetic separation then removes iron-bearing minerals, eliminating their interference with flotation. Finally, a ternary combined collector composed of SN01-1-hydroxyoxime acid, SN02-1-hydroxyoxime acid, and a flotation defoaming agent is used for cassiterite flotation. This method achieves efficient recovery of difficult-to-process cassiterite resources from coarse sand in tailings dams, providing an effective technical path for the resource utilization of historically inherited tailings.

The invention discloses a composite chelating collector and a fine-fraction cassiterite flotation method and system, and relates to the technical field of mineral processing and flotation. According to the method, the phosphonic acid-hydroximic acid composite chelating collecting agent is adopted, the agent can specifically reinforce the surface hydrophobicity of cassiterite, the agent and the high-pressure microbubble flotation technology generate a synergistic effect, and therefore efficient, high-selectivity and environment-friendly flotation of fine-particle and micro-fine-particle cassiterite is achieved; the method is suitable for solving the technical problem that the-10 [mu] m cassiterite is difficult to recover through a traditional reselection and flotation process.

The invention belongs to the technical field of mineral processing, and particularly discloses a method for enhancing cassiterite flotation in the old tailing process of a tailing pond. Aiming at refractory tin-containing old tailings stockpiled in a tailings pond, a technical route of firstly grading and then grinding, cleaning by ultrasonic waves and an oxidizing agent, flotation and impurity removal of sulphide ore and efficient and synergistic collection of cassiterite is adopted. According to the method, an oxide layer and pollutants on the surface of cassiterite in the old tailings can be effectively removed, flotation recovery is conducted on cassiterite which is difficult to recover through a previous mineral separation technology through a process strengthening technology by combining the synergistic and complementary characteristics of alkyl hydroximic acid and organic acid collecting agents, and effective recovery of tin resources in the stockpiled old tailings is achieved.

The invention relates to application of ciclopirox and ethanolamine salt thereof in mineral flotation, in particular to application of ciclopirox and ethanolamine salt thereof as a collecting agent in flotation separation of cassiterite and gangue minerals. The ciclopirox and the ethanolamine salt thereof can be adsorbed on the surface of cassiterite, the surface hydrophobicity of the cassiterite is enhanced, the cassiterite and gangue minerals can be efficiently separated, the recovery rate of cassiterite concentrate is effectively increased, and the compound is small in environmental pollution and environmentally friendly.

The invention relates to the technical field of water pollution control and treatment, in particular to an integrated treatment method and system for historical remaining tin ore tailing pond percolate, and the method comprises the following steps: obtaining tailing heap dissolved oxygen data and generating a direction sequence, extracting matching of decline section analysis and flow velocity, identifying a lagging area and triggering oxygen release, a response sequence is generated by pairing metal valence state and oxygen change, and a treatment scheme is generated by combining pH and concentration trend. According to the method, accurate recognition and centralized intervention of the response section are achieved by constructing the oxygen concentration change trend and positioning the lag region, the effectiveness and pertinence of oxygen delivery are improved, the control precision of valence evolution is enhanced by extracting the metal valence transition behavior and pairing the metal valence transition behavior with the oxygen change time point, and the accuracy of oxygen delivery is improved. And combined trend analysis of pH and heavy metal concentration is combined to form a linkage regulation and control mechanism among pollution indexes, so that the response efficiency of the treatment process is improved, and the rhythm matching degree and the stability of water quality improvement are intervened.

The application provides a tin mineralization identification and sampling method fusing XRF and spectral data, and relates to the technical field of geological exploration and mineral exploration. The method comprises the following steps: tin element content distribution is obtained by adopting portable XRF to perform grid rapid scanning; the characteristic peak of altered mineral is identified by using a portable spectrometer at an abnormal point; XRF data and spectral data are fused; the boundary of a tin mineralization body is rapidly circled on site; and the geological logging and sampling are guided accordingly. The application implements forced sampling on the point which is not mineralized by naked eyes but is determined as mineralized by instruments, and fundamentally solves the technical problem of "logging without seeing and supplementing sampling with ore". The application can significantly reduce the ore leakage rate, improve the accuracy and efficiency of logging and sampling, shorten the exploration period, and can be popularized to the on-site exploration of other difficult-to-identify metal minerals.

The application discloses a production process of tin ore powder, and specifically comprises the following steps: S1, material pretreatment, selecting tin ore raw ore and cleaning the same to remove surface stains; S2, material primary treatment, crushing the treated raw ore and screening the same to obtain oversize and undersize. The application separates the oversize and undersize after preliminary crushing and screening of the raw ore, removes magnetic impurities in the oversize and undersize through magnetic separation, collects powder in the undersize, prevents loss of the ore powder in the cleaning process, further reduces the particle size of the crushed ore through secondary crushing, and finally, synchronously feeds the cleaned crushed ore and the collected ore powder into a grinding device for grinding, so that the finished product is obtained, the loss of the ore powder is small in the process, and the purity of the tin ore powder finished product is ensured.

The invention discloses a carboxylic acid flotation collecting agent and a synthesis method and application thereof, the application is that an amino carboxylic acid compound is used as a mineral flotation collecting agent to be applied to flotation recovery of valuable metals in oxidized minerals containing rare earth, cassiterite, copper oxide and the like, and two functional groups are connected through an amino group and a hydrocarbon chain; the repulsive force between coordination groups and the repulsive force between surrounding hydration layers are weakened, the hydrophobicity of the mineral surface is effectively improved, and the mineral flotation recovery performance can be remarkably improved. When being applied to flotation separation of non-ferrous metal and precious metal ores as a non-ferrous metal and precious metal ore collecting agent, the flotation separation and recovery of non-ferrous metal and precious metal are expected to be effectively realized. Compared with a common flotation collecting agent in the prior art (the common flotation collecting agent is suitable for being used under the strong acid condition, the strong acid can corrode equipment, and inconvenience is brought to research), enrichment and recovery of non-ferrous metal and precious metal minerals such as rare earth, cassiterite and copper oxide can be effectively improved under the weak alkaline condition.

The invention provides a method for extracting cassiterite through reselection of smelting waste residues, and belongs to the field of solid waste resource utilization. Tantalum-niobium wet smelting residues are subjected to water leaching pretreatment, soluble impurities are removed, and tin-grade-enriched water leaching residues are obtained; and the water leaching residues are subjected to size mixing and then centrifugal reselection, and tin concentrate is obtained. According to the method for recovering cassiterite from tantalum-niobium smelting slag, the defects in the prior art are overcome, the method is short in process, low in cost and capable of achieving ultrahigh recovery rate and high-grade enrichment at the same time, and the core of the technical scheme lies in that the synergistic effect between water leaching pretreatment and centrifugal reselection is found; according to the method, soluble impurities are removed through water leaching, the grade is preliminarily enriched, then the strong capturing capacity of a centrifugal force field on fine-fraction heavy minerals is combined, the high recovery rate and high-grade enrichment are achieved at the same time, the cassiterite recovery rate is larger than or equal to 85%, the final concentrate grade is larger than or equal to 20%, and the comprehensive enrichment ratio gt is achieved; and the index is far superior to that of the traditional reselection process.

This invention discloses a dynamic image analysis and measurement method and system for cassiterite mineral particles, specifically relating to the field of industrial vision analysis technology. It addresses the problem that existing methods struggle to accurately distinguish particle motion states and separate motion trails in dynamic flow fields, leading to inaccurate segmentation, tracking, and parameter measurement. By acquiring continuous frame images and extracting flow velocity characteristics of the flow field region, the method determines cross-frame displacement trends based on the overlap of neighboring pixel grayscale distribution and flow velocity characteristics. It extracts the stability of candidate particle contour morphology and performs matching verification. For matched particles, it constructs a flow velocity field constraint range and obtains a motion vector field. Combining the motion vector amplitude corresponding to the cassiterite mineral density, it uses density clustering to distinguish cross-frame displacement from independent multi-particle motion. High-speed moving particles are selected, and inter-frame grayscale gradient difference is used to separate motion trails from the true contour. Based on the motion type and the true contour, it completes target segmentation, contour tracking, and parameter measurement, improving the accuracy of particle analysis under dynamic conditions.

The invention discloses a hydroxamic acid flotation collecting agent and a synthesis method and application thereof, the application is that an amino hydroxamic acid compound is used as a mineral flotation collecting agent to be applied to flotation recovery of valuable metals in non-ferrous metals and precious metal minerals containing rare earth, cassiterite, copper oxide and the like, and two functional groups are connected through an amino group and a hydrocarbon chain; the repulsive force between coordination groups and the repulsive force between surrounding hydration layers are weakened, the hydrophobicity of the mineral surface is effectively improved, and the mineral flotation recovery performance can be remarkably improved. Compared with a common flotation collector in the prior art, enrichment and recovery of rare earth, cassiterite, copper oxide and other nonferrous metal and precious metal minerals can be effectively improved.

The invention discloses a method for separating and recovering tin from low-grade tungsten-tin ore, which belongs to the technical field of extraction metallurgy, and comprises the following steps: adding a vulcanizing agent into a low-grade tungsten-tin ore mixed ore material, heating, carrying out high-temperature vacuum melting, cooling the obtained sublimate to obtain a tin-rich condensate mainly existing in the form of SnS, and separating the tin-rich condensate from the low-grade tungsten-tin ore mixed ore material. The residue is tungsten-containing mixed ore with very low tin content; according to the method, the vulcanizing agent is added into the mixed mineral aggregate for vacuum melting, tin oxide in the mixed mineral aggregate is vulcanized and sublimated at a high temperature, the condensate rich in tin is obtained through cooling, and tin in the mixed mineral aggregate is effectively separated and recycled; the method is simple in technological process and high in tin separation and recovery efficiency, the problem that tin in the tungsten-tin ore is difficult to treat is solved, good conditions are created for recovery of metal such as tungsten in the ore, and comprehensive utilization of metal resources in the ore is facilitated.

The present application relates to the technical field of metallurgy, and discloses a process for enriching copper and nickel from secondary nickel return material, which comprises the following steps: blending the secondary nickel return material, cassiterite and a slagging agent, and then calcining in a reducing atmosphere. The main component of the cassiterite is SnO2, which is reduced to Sn in the reducing atmosphere. Sn has a low melting point and can penetrate into the intergranular space of the secondary nickel return material, thus destroying the original dense structure and forming a tin-nickel-copper low-melting-point alloy. This effectively reduces the dissolution leaching difficulty of nickel and copper in the secondary nickel return material, thereby improving the dissolution leaching efficiency. At the same time, by adding the cassiterite, the smelting temperature is reduced. Compared with the smelting temperature of about 1400-1500 DEG C in the prior art, the present application can smelt at 1000-1100 DEG C, thereby saving energy consumption and effectively recycling the tin in the cassiterite.

The application discloses a micro-fine-grained cassiterite flotation collector and a preparation method and application thereof, and belongs to the technical field of mineral flotation. 27 H 43 NO3; the synthesis process comprises three core reactions: firstly, hydroxylamine hydrochloride and sodium hydroxide are stirred in deionized water; secondly, methyl phenylpropionate is added for reaction; finally, oleic acid is added dropwise for acidification, and the target product is obtained through separation; the collector has strong selective adsorption capacity and has no obvious effect on gangue minerals; the synthesis process is simple, the reaction condition is mild, raw materials are easy to obtain, and the application range is wide; the grade and recovery rate of tin ore concentrate can be obviously improved, the problems of poor selectivity, large consumption of reagents and poor recovery effect on micro-fine-grained cassiterite of traditional cassiterite collectors are solved, and the collector has good industrial popularization and application value.

The invention discloses a cassiterite flotation combined inhibitor and application thereof. The combined inhibitor is composed of N-(phosphoryl methyl) glycine and carboxymethyl cellulose. According to the invention, N-(phosphoryl methyl) glycine and carboxymethyl cellulose are synergistically compounded, N-(phosphoryl methyl) glycine is used as a molecular anchoring agent, and accurate recognition and locking of calcium active sites on the surfaces of calcite, fluorite and other minerals are realized through specific chelation; carboxymethyl cellulose serves as a space barrier and a film-forming agent, a compact, hydrophilic and stable three-dimensional coating film is formed on the basis of anchoring, and long-acting three-dimensional shielding is provided; the cassiterite and the calcium-containing gangue have complementary functions and synergistic interaction, and high-strength and high-selectivity inhibition on the calcium-containing gangue can be realized on the premise of basically not influencing the floatability of the cassiterite, so that the separation efficiency of the cassiterite and the calcium-containing gangue minerals and the concentrate quality are remarkably improved; the inhibition effect is lasting and stable, the calcium impurity content in the tin concentrate can be effectively reduced, and the tin concentrate quality and the separation efficiency are improved.

The application discloses application of a hydroxamic acid modified starch-metal ion flocculant in tin stone flotation, and the flocculant has the following structural formula: wherein n is an integer of 500-1000, and Me is Cu 2+ , Zn 2+ , Fe 3+ , Fe 2+ , Pb 2+ , Al 3+ , Mg 2+ or Ca 2+ . The hydroxamic acid modified starch-metal ion complex used in the application has a strong selective flocculation effect on tin stone with a particle size less than 38 microns, and can effectively improve the floatability of the tin stone with a particle size less than 38 microns, wherein the formed complex has a strong chelation performance on tin stone and other oxides, so that the hydroxamic acid modified macromolecular starch realizes selective bridging of the tin stone with a fine particle size, realizes selective bridging and lengthening of tin stone particles, and greatly improves the flotation efficiency.

The invention belongs to the technical field of mineral separation, and particularly relates to a reverse flotation-reselection combined fluorine reduction method for cassiterite products. The method comprises the following steps: feeding raw ore into a flotation machine, and adding a sulfur separation agent to obtain sulfur concentrate and desulphurized underflow; adding a fluorine separation agent into the desulfurized underflow to obtain fluorite rough concentrate I and tin rough concentrate I; the first tin rough concentrate enters a shaking table, and tin concentrate and first tin middling are obtained; the first tin middlings enter a flotation machine after being ground and graded, and sulfur concentrate and second tin rough concentrate are obtained by adding a sulfur separation agent; adding a fluorine separation agent into the tin rough concentrate II to obtain fluorite rough concentrate II and tin middling II; a cassiterite flotation reagent is added into the second tin middling, and cassiterite rough concentrate and first tailings are obtained; the cassiterite rough concentrate enters a table concentrator, and tin concentrate and third tin middlings are produced; the third tin middlings enter a centrifugal machine, and tin-rich middlings and fourth tin middlings are produced; the fourth tin middling enters a flotation machine, a fluorine separation agent is added, and third fluorite rough concentrate and second recovery tailings are obtained; and the first fluorite rough concentrate, the second fluorite rough concentrate and the third fluorite rough concentrate are fed into a flotation machine, a fluorine separation agent is added, and fluorite concentrate and second tailings are obtained.

The application discloses a kind of floatation reagent and the method for microfine tin stone and magnesium-containing gangue mineral floatation separation, belong to mineral processing technical field.The floatation reagent includes collector and inhibitor;Collector is phosphonic acid nanocolloid collector, and phosphonic acid nanocolloid collector is assembled by phosphonic acid compound and divalent metal ion coordination;Inhibitor is hydroxyl polysaccharide compound;The collector can promote the targeted aggregation of microfine tin stone, realize the effective collection of microfine tin stone, the inhibitor can selectively occur hydroxyl activation and isosite adsorption on the magnesium site on the surface of magnesium-containing gangue, realize the hydrophilic activation and flocculation activation of magnesium-containing gangue mineral, realize the selective inhibition of magnesium-containing gangue mineral, so as to be under the joint action of both, strengthen the efficient floatation separation of microfine tin stone and magnesium-containing gangue mineral.

The invention discloses a flotation reagent and method for sulfur and arsenic mineral activating agent and tin concentrate reverse flotation desulfurization and dearsenification, and belongs to the technical field of mineral processing. The sulfur-arsenic mineral activating agent comprises thiosulfate, soluble lead salt and soluble copper salt, can activate arsenic-sulfur minerals such as arsenopyrite (FeAsS2), pyrite (FeS2) and pyrrhotite (Fe1-xS) in a high-selectivity mode, enhances the flotation performance of the arsenic-sulfur minerals, and is used in cooperation with a cassiterite inhibitor, a sulphide ore collecting agent and a foaming agent, so that the flotation efficiency of the arsenic-sulfur minerals is improved, and the flotation efficiency of the arsenic-sulfur minerals is improved. The method is particularly suitable for flotation removal of arsenic-sulfur minerals in the tin concentrate, the tin loss can be remarkably reduced while the tin concentrate desulfurization and dearsenification efficiency can be greatly improved, and the environmental protection pressure of subsequent smelting is effectively relieved.