45 results about "Arsenic sulfide" patented technology

The invention belongs to the technical field of metallurgy, and relates to a method for comprehensively recovering valuable elements from nonferrous smelting waste acid, which comprises the following steps: S1, mixing the waste acid with pyrrhotite, reacting in a sulfur dioxide atmosphere, and after the reaction, carrying out solid-liquid separation to obtain copper slag and copper removal liquid; and S2, H2S gas is introduced into the copper removal liquid obtained in the step S1, and after reaction, arsenic sulfide slag and arsenic removal liquid are obtained through solid-liquid separation. According to the method, FeS in the pyrrhotite selectively reacts with CuSO4 in the waste acid to generate indissolvable copper sulphide precipitates, meanwhile, under the protection of the sulfur dioxide atmosphere, the arsenic element in the waste acid is kept in a dissolved state and does not precipitate, the copper and arsenic elements in the waste acid can be effectively separated through the synergistic effect of the FeS and the CuSO4, and the separation steps are simple and efficient.

The present invention discloses a method for removing impurities from waste acid and fully recycling the waste acid. The method comprises the following steps: introducing hydrogen sulfide into the waste acid for a sulfidation reaction, removing arsenic sulfide and mercuric sulfide precipitates formed during the reaction; continuing to introduce hydrogen sulfide for a step-by-step sulfidation reaction, adding an iron-containing substance to adjust the reaction pH and ORP, and recovering the copper, lead, and zinc sulfide slag precipitates formed during the reaction in a step-by-step manner; adding an iron-containing substance for a neutralization reaction, controlling the pH and ORP, promoting the reaction between iron ions and arsenate, and removing the ferric arsenate precipitate formed during the reaction; adding an adsorbent for an adsorption reaction, and removing fluorine-containing and thallium-containing components by adsorption; introducing an oxidant for an oxidative hydrolysis reaction, controlling the degree of hydrolysis, and preparing polyferric sulfate. The present invention utilizes the iron-containing substance to remove impurities from waste acid, thereby achieving deep impurity removal and full resource utilization of waste acid.

The invention discloses a composite metal oxide curing agent and application thereof in sulfur-fixing and arsenic-fixing harmless treatment of arsenic sulfide slag, and relates to the technical field of hazardous waste harmless treatment. The composite metal oxide curing agent is prepared from the following components: 30 to 45 weight percent of Fe2O3, 20 to 30 weight percent of Al2O3, 15 to 25 weight percent of CaO, 5 to 10 weight percent of SiO2, 1 to 3 weight percent of TiO2, 3 to 5 weight percent of bentonite binder and 0.5 to 2 weight percent of citric acid accelerant. The preparation method comprises the following steps: step 1, raw material pretreatment; step 2, carrying out sol-gel synthesis; step 3, calcining treatment; step 4, function strengthening; and step 5, forming and packaging. FeAl2O4 is formed through a spinel structure to achieve lattice curing of arsenic, sulfate stabilization is promoted through the calcium-sulfur synergistic effect, the energy consumption is reduced by 30% or above through the low-temperature calcination technology, and when the curing agent is applied to sulfur and arsenic fixing harmless treatment of arsenic sulfide residues, the content of leached arsenic can be smaller than or equal to 0.3 mg / L.

The utility model discloses a kind of arsenic sulfide slag recovery arsenic with processing device, including reduction tank, liquid inlet and outlet are respectively arranged in the two sides of reduction tank, top is communicated with liquid inlet pipe and feed pipe, and storage tank and the storage tank of bottom with liquid inlet pipe intercommunication are supported in upper portion;The bottom of storage tank is communicated with the blanking pipe of electromagnetic valve, weighing device and the weighing tank of top end and blanking pipe bottom end contact are equipped below blanking pipe;Weighing tank one side top end is equipped with material receiving port, and the other side is equipped with automatic adjusting mechanism;The bottom plate of weighing tank is movable plate, upper end is equipped with material level meter, and driving part that movable plate is opened and closed is connected outside weighing tank;Storage tank top is equipped with feed inlet and water inlet pipe with flowmeter, arsenic analysis detector is equipped in reduction tank top with probe located in reduction tank, lifting mechanism that driving weighing device lifts and conveying mechanism that conveying weighing tank to feed inlet pipe, feed inlet upper portion;Overall degree of automation is high, labor intensity is low, reduction agent is put with high precision and low in cost.

The invention relates to the field of mineral flotation, in particular to a dihydroxythioisoflavone copper-arsenic separation inhibitor and a preparation method and application thereof. The preparation method of the copper-arsenic separation inhibitor comprises the following steps: adding an 8-beta-D-glucopyranosyl-4 ', 7-dihydroxyisoflavone organic compound into a solvent, then adding a Lawson reagent, raising the temperature, and reacting to obtain a reaction solution; and cooling, filtering, purifying and crystallizing the reaction liquid to obtain the dihydroxythioisoflavone copper-arsenic separation inhibitor. The dihydroxy thioisoflavone copper-arsenic separation inhibitor prepared by the invention can selectively carry out oxidation inhibition on arsenic-containing minerals such as arsenopyrite, arsenhedrite and akaidite, reduces the content of arsenic in copper concentrate, is simple to apply on site, does not need to change the process flow on site, only needs to adjust the dosage of the medicament and add the medicament according to the amount, is simple to operate, and is suitable for industrial production. The index is stable.

The application discloses a kind of high-efficiency energy-saving sulphidized arsenic residue cleaning treatment process, comprising the following steps: (1) the sulphidized arsenic residue containing free acid is slurried with calculated amount 3~6 times of reducing agent, the pH value of slurry is adjusted to 6.5 with adjusting agent, and dry material is obtained by filtering and drying;(2) adding skeleton material to dry material, and making hollow brick by brick making machine after mixing evenly;(3) the hollow brick is transferred into furnace to carry out drying, reduction, sublimation and cooling in turn to complete the process of arsenic removal, and obtain arsenic removal residue and arsenic-containing high-temperature flue gas;(4) after heat exchange and cooling by heat exchanger, the arsenic-containing high-temperature flue gas enters condensing chamber to condense and recover arsenic to obtain arsenic trioxide;(5) after flue gas purification and water-gas separation, the arsenic removal tail gas returns to use.The application uses the above treatment process, basically no external heating is needed during continuous production, the purity of arsenic trioxide recovered by condensation is relatively high, the arsenic removal tail gas is recycled after nitrogen purification, basically no external discharge or very small discharge amount, and it is environment-friendly.

The invention provides a method for synergistically depleting copper slag by using SO2 flue gas and arsenic sulfide slag, which comprises the following steps: under the action of a plasma torch, carrying out vulcanization reaction on the arsenic sulfide slag and the copper slag to obtain hot slag, and slowly cooling the hot slag to obtain slowly cooled slag; the slow cooling slag comprises a metal sulfonium phase and a slag phase which are well bounded, and the arsenic element in the arsenic sulfide slag is fixed in the slag phase; the plasma torch takes N2 and SO2 flue gas as working media, and the dosage volume ratio of the N2 to the SO2 flue gas is (3-5): 1; the dosage mass ratio of the copper slag to the arsenic sulfide slag is 100: (4-6). According to the method, copper, lead and zinc, arsenic sulfide and sulfur elements in SO2 flue gas can be combined and fixed in a metal sulfonium phase, more than 96% of valuable metal sulfides such as copper, lead and zinc are enriched to form particles of more than 40 microns, slow cooling slag with obvious ore phase boundary is obtained, and subsequent flotation treatment is easier.

The present invention belongs to the field of metallurgy and relates to a method for synergistically recovering valuable elements from arsenic-antimony fly ash and antimony electrodeposition lean solution. The method comprises the following steps: S1: mixing the arsenic-antimony fly ash with the antimony electrodeposition lean solution for an alkaline leaching reaction, whereupon antimony oxide slag and an arsenic-rich antimony solution are obtained; S2: adjusting the pH of the arsenic-antimony solution obtained in step S1 to a pH of 7-8, whereupon antimony sulfide slag, hydrogen sulfide gas, and an arsenic-rich solution are obtained; and S3: adjusting the pH of the arsenic-rich solution obtained in step S2 to a pH of 1-2, whereupon arsenic sulfide slag, hydrogen sulfide gas, and a sodium sulfate solution are obtained. The present invention utilizes the synergistic reaction of the arsenic-antimony fly ash with the antimony electrodeposition lean solution, and subsequently separates arsenic and antimony from the arsenic-rich antimony solution by reacting sodium thioarsenite (Na3AsS3) and sodium thioantimonite (Na3SbS3) with acid in different sequences. The separation and recovery steps are simple and the recovery rate is high.

This invention belongs to the technical field of safe solidification treatment of hazardous solid waste, specifically disclosing a solidification treatment method for high-arsenic arsenic sulfide slag hazardous waste: 1) Pretreatment and pH adjustment of high-arsenic arsenic sulfide slag. Using high-arsenic arsenic sulfide slag produced by sulfidation of arsenic-containing wastewater from smelting as raw material, the arsenic sulfide slag is pretreated with a pH adjuster to approximately pH 5-7; 2) Stabilization and arsenic solidification treatment of high-arsenic arsenic sulfide slag. The stabilizer, adsorbent, additive, and gelling material of the pretreated arsenic sulfide slag are weighed according to the ratio, and after initial mixing and forced stirring, the mixture is fully reacted for about 1 hour. The amount of reagents added is adjusted according to the arsenic content; 3) Solidification and coating of high-arsenic arsenic sulfide slag. A solidifying agent is added, and the mixture is forcibly stirred, extruded, and pressed into a solidified body. It is then naturally cured for 3 days. A toxicity leaching test is conducted according to GB5085.3-2007. If the arsenic and heavy metal ion leaching of the solidified body is less than the relevant standard requirements, it can be stockpiled or landfilled.

The invention relates to the technical field of wet-process phosphoric acid purification, and discloses a method for separating and utilizing arsenic in wet-process phosphoric acid, which comprises the following steps of: clarifying wet-process phosphoric acid, and feeding supernate into an arsenic removal reaction tank; preparing an induced crystallization agent and a dearsenification agent, firstly adding the induced crystallization agent into the reaction tank, and then adding the dearsenification agent for reaction to obtain dearsenification phosphoric acid A; then heating and dissolving the phosphoric acid C, and cooling and growing crystals to obtain arsenic-removed phosphoric acid C; filtering to obtain arsenic-removed phosphoric acid and arsenic sulfide precipitate; washing and drying the precipitate to obtain an arsenic sulfide product; according to the method, the induced crystallization agent is combined with the dissolution-recrystallization process, so that separated arsenic sulfide is attached to the induced crystallization agent and grows into large-particle precipitates easy to filter, selective separation of arsenic is realized, and generation of arsenic-containing waste residues is avoided; and meanwhile, the separated arsenic is directly converted into a high-purity arsenic sulfide product, so that resource utilization of the arsenic is realized.

The invention belongs to the technical field of heavy metal pollution control, and particularly relates to a ferrihydrite-arsenic coprecipitation system arsenic sulfide immobilization method based on humic acid regulation and control. According to the method, humic acid is introduced into a ferrihydrite-arsenic coprecipitation system in a low-sulfur environment, so that the humic acid participates in structure construction in the mineral forming process, an organic-inorganic composite mineral phase is generated, mineral crystallization and surface densification are promoted in the subsequent low-sulfur treatment process, and a more stable arsenic fixing structure is formed; experiments show that compared with a low-vulcanization system without humic acid, after the ferrihydrite-arsenic coprecipitate under the regulation and control of humic acid is subjected to low-vulcanization treatment, the concentration of water-phase arsenic is remarkably reduced, the fixing efficiency can be improved by 20%-35%, and high stability is kept under the oxidation condition. The invention provides an efficient, controllable and environment-friendly solution for arsenic-containing wastewater and sediment treatment and groundwater pollution prevention and control.

The invention discloses a method for comprehensively enriching and recovering cadmium and thallium from complex arsenic sulfide slag, belongs to the technical field of harmless treatment of dangerous waste residues and resource recovery of rare and noble metals, and aims to solve the problems that the existing process is difficult to realize fractional separation of fluorine, chlorine, arsenic, cadmium and thallium in the arsenic sulfide slag, and the thallium is low in recovery rate and insufficient in purity. According to the method, fluorine and chlorine and thallium arsenic-cadmium lead are separated through graded alkaline leaching; the cadmium-containing lead slag is subjected to zinc electrodeposition waste liquid acid leaching and sodium sulfite and citric acid purification, and cadmium-containing coarse filtrate is obtained; adjusting the pH value of the thallium-containing arsenic liquid step by step, and adding sodium hydrosulfide for precipitation to obtain high-purity thallium slag; according to the method, no toxic gas is generated, the emission of wastewater is reduced by 80%, conventional equipment is used, industrialization is easy, and unification of harmlessness of hazardous waste and efficient recycling of resources is achieved.

The application provides a method for recovering metallic arsenic from arsenic sulfide residue by using calcium carbonate and a carbon source, comprising: providing a reaction container with a high-temperature zone and a low-temperature zone in communication; reacting arsenic sulfide residue, calcium carbonate and a carbon source in the high-temperature zone; during the reaction, the generated metallic arsenic is transferred to the low-temperature zone; the molar ratio of the calcium carbonate to the arsenic sulfide in the arsenic sulfide residue is not less than 3; the molar ratio of the carbon element in the carbon source to the arsenic sulfide in the arsenic sulfide residue is not less than 3; the temperature of the high-temperature zone is 800-950 DEG C, and the temperature of the low-temperature zone is 600-750 DEG C. Based on the combined treatment of the calcium carbonate and the carbon source, the application can recover the metallic arsenic from the arsenic sulfide residue in one step, and can ensure the recovery rate and purity of the metallic arsenic product.

The utility model relates to non - harmful treatment technical field of non - ferrous metallurgy arsenic sulfide residue, specifically disclose arsenic sulfide residue non - harmful drying treatment unloading crushing device, including unloading hopper and the material receiving box that one end is provided with the discharge gate, the inside of unloading hopper is provided with crushing mechanism, the crushing mechanism includes a plurality of uniformly distributed in the left and right sides of unloading hopper inner wall resistance material rod, two rotationally connected in the front and back sides of unloading hopper inner wall pivot, a plurality of fixedly connected in the pivot outer wall crushing rod, a plurality of resistance material rod respectively with a plurality of crushing rod staggered distribution, resistance material rod and crushing rod all are obliquely arranged, through the collaborative shearing crushing design of staggered oblique resistance material rod and rotary crushing rod, combine explosion -proof motor and semi -closed structure, the efficient crushing and safe non - harmful treatment of arsenic sulfide residue have been realized, effectively improved the crushing efficiency and reduced the environmental pollution risk.

The invention discloses a continuous arsenic sulfide slag drying treatment system and method for corrosive waste gas filtration, and belongs to the technical field of hazardous waste treatment.The system comprises a box, and a closed feeding unit, a sectional type low-temperature drying unit and a discharging unit are arranged in the box; the sectional type low-temperature drying unit is circularly communicated with the corrosion protection unit and the heating air supply unit; the corrosion protection unit comprises a dry type filter unit, a wet type filter unit, a water condenser and a steam preheating recoverer, and is used for realizing graded purification, condensation dehumidification and heat energy recovery of corrosive waste gas; the heating air supply unit provides heated circulating air for the drying unit, and the sectional type low-temperature drying unit adopts a PVC + nylon anti-corrosion mesh belt and an ash removal scraping belt, so that closed drying and anti-scattering ash removal of materials are realized. According to the method, the whole-process closed drying of the arsenic sulfide slag is achieved, the weight reduction rate reaches 40% or above, the corrosive gas removal rate reaches 98% or above, the energy utilization rate is high, and the method is suitable for large-scale treatment of the arsenic sulfide slag in the non-ferrous metal smelting industry.

The application discloses a method for preparing elemental sulfur and metallic arsenic by using arsenic sulfide residue, which comprises the following steps: providing arsenic sulfide residue; mixing the arsenic sulfide residue with lignin and acid liquor, and heating to a first preset temperature to obtain preheated ore slurry; introducing steam and oxygen into the preheated ore slurry, and reacting at a second preset temperature and a preset oxygen partial pressure for a first predetermined time, and then performing solid-liquid separation treatment to obtain leaching liquor and leaching residue; heating and melting the leaching residue at a third preset temperature, and performing hot filtration to obtain elemental sulfur; adding a reducing agent to the leaching liquor, and reacting at a fourth preset temperature for a second predetermined time, and then performing solid-liquid separation treatment to obtain metallic arsenic and arsenic precipitation liquid. The method can convert arsenic into solution by controlling oxygen leaching, and sulfur is enriched in the leaching residue in the form of elemental sulfur, and then the elemental sulfur and the metallic arsenic are respectively produced through an elemental sulfur preparation process and a hydrogen reduction process, so that the method has the technical advantages of simple process flow, safe product, no secondary hazardous waste generation and the like.

The application provides a method for preparing metallic arsenic and sulfur fixation by calcium oxide assisted carbothermic reduction of arsenic sulfide residue, comprising: providing a reaction container with a high-temperature zone and a low-temperature zone in communication; reacting arsenic sulfide residue, calcium oxide and a carbon source in the high-temperature zone; the molar ratio of the calcium oxide to arsenic sulfide in the arsenic sulfide residue is not less than 2; the molar ratio of carbon in the carbon source to arsenic sulfide in the arsenic sulfide residue is not less than 2; the temperature of the high-temperature zone is 750-900 DEG C, the temperature of the low-temperature zone is 650-750 DEG C, and the temperature of the high-temperature zone is higher than that of the low-temperature zone; during the reaction, the generated metallic arsenic transfers to the low-temperature zone, and the generated calcium sulfide stays in the high-temperature zone. The application recovers metallic arsenic and fixes sulfur from arsenic sulfide residue through one-step smelting, avoids the generation of sulfur-containing gas, and improves the recovery rate of the metallic arsenic product.

The invention provides an environment-friendly treatment facility and method for drying and reducing arsenic sulfide slag of a smelting enterprise, and relates to the technical field of solid waste treatment and environment-friendly treatment. The environment-friendly treatment facility and method for drying and reducing the arsenic sulfide slag of the smelting enterprise comprise the following steps that S1, arsenic sulfide generated by water treatment filter pressing is subjected to primary drying through a polytetrafluoroethylene anticorrosive coating heat exchanger in an indirect heat exchange mode, the drying temperature is controlled to range from 120 DEG C to 180 DEG C, and the drying time is controlled to range from 20 min to 60 min; and S2, the semi-dried material obtained in the step S1 is conveyed to a corrosion-resistant crusher through automatic equipment to be crushed, the crusher crushes the material till the granularity is 20-100 meshes, and free water and crystal water in the arsenic sulfide slag can be further dried conveniently. And the generated waste gas and particulate matters are effectively collected and treated, so that the risk that the generated foul gas such as hydrogen sulfide pollutes the environment is avoided, environmental protection is more and more paid attention in recent years, and the technology has a wide application prospect.

The utility model relates to a discharging opening of an arsenic sulfide slag plate frame. The arsenic sulfide slag plate frame discharge port comprises a conical hopper, and further comprises a plate frame fixed at the upper end of the conical hopper, the first sealing plate is hermetically connected to one side of the lower end of the plate frame and is positioned in the conical hopper; the second sealing plate is hermetically connected to the other side of the lower end of the plate frame and is positioned in the conical hopper; the included angle a formed by the first sealing plate and the lower end face of the plate frame and the included angle b formed by the second sealing plate and the lower end face of the plate frame are larger than those formed by the first side plate and the second side plate of the conical hopper and the lower end face of the plate frame. The plate frame is fixedly connected to the upper end of the conical hopper, and meanwhile, the first sealing plate and the second sealing plate are connected to the two sides of the lower end of the plate frame 2 in a sealed mode, so that the plate frame, the first sealing plate and the second sealing plate form a vertically-communicated new closed discharging hopper, and potential safety hazards caused by the fact that arsenic sulfide slag falls out of a discharging opening are avoided.

The invention discloses a method for separating copper and arsenic in a high-nickel-copper-arsenic solution, relates to the technical field of purification, separation and impurity removal in wet smelting of non-ferrous metals, and solves the problems that copper and arsenic in the high-nickel-copper-arsenic solution are not thoroughly separated, and the recovery rate of valuable metals is low. According to the method, copper and arsenic are effectively separated through the procedures of first-stage sulfuration copper removal, second-stage sulfuration copper removal and sulfuration arsenic removal, second-stage copper sulfide slag is treated through the procedure of copper slag arsenic removal, arsenic sulfide slag is treated through the procedure of arsenic slag nickel removal, and a material circulation system in which liquid obtained after copper slag arsenic removal enters the procedure of second-stage sulfuration copper removal and liquid obtained after arsenic slag nickel removal enters sulfuration arsenic removal is set. The method has the advantages of simple process flow, good separation effect, high recovery rate, low operation cost and the like.

The invention relates to the technical field of hard-to-treat gold ore hydrometallurgy, and discloses an ore characteristic analysis-based gold mineral comprehensive recovery and purification method, which comprises the following steps of: determining a sulfur-carbon mass ratio of arsenic sulfide-containing gold ore, and determining a target potential interval in a segmented potential control program according to the sulfur-carbon mass ratio; after pulp mixing, controlling the potential of the ore pulp in a first potential interval by adjusting the adding amount of an oxidizing agent, so that the ore pulp is stabilized at an arsenic-containing sulfide lattice selective dissociation site, and wrapping gold is released; fine-fraction pyrite is supplemented into the ore pulp in the second potential interval, the pyrite and the arsenic-containing sulfide are used for constructing an interface current activation passivation layer generated by a microcosmic primary battery, densification growth of an iron oxide passivation film is inhibited through the synergistic effect of ore phase selective dissociation and an interface polarization compensation mechanism, and therefore the iron oxide passivation film is prevented from being damaged. And the dissociation state of micro-fine particle gold in the ore is improved.

The invention discloses a method for utilizing de-heavy residue from wet-process phosphoric acid, comprising the following steps: step 1), grinding and finely grinding low-grade phosphate ore; step 2), adding the powdered material in step 1), mixing and placing the mixture in a disc pelletizing machine for pelletizing; heating the dried pellets with conventional yellow phosphorus furnace charge, condensing volatilized arsenic sulfide and lead sulfide through a flue gas heat exchanger, and enriching them to obtain arsenic-lead dust; step 6), raising the furnace temperature in step 5) to 1300° C. to 1600° C., condensing P vapor and SiF4 gas generated by the high-temperature reaction through spraying water, and collecting them; step 7), performing solid-liquid separation of the solid yellow phosphorus collected in step 6) and liquid H2SiF6 to obtain a main product, yellow phosphorus, and a by-product, H2SiF6. The preparation of the pellets according to the invention does not require the addition of an additional binder or sintering, has low energy consumption, and has better effects; the invention can separate and enrich As and Pb elements in the de-heavy residue without causing phosphorus loss, and the arsenic-lead dust can be used as a raw material for lead smelting.

This invention discloses a sulfide solid electrolyte, its preparation method, and a battery, belonging to the field of battery material technology. The preparation of the sulfide solid electrolyte includes: thermally reacting the raw materials for the preparation of the sulfide solid electrolyte; tangentially filtering the material obtained after the thermal reaction; and spray-drying the solid obtained from the tangential flow filtration. The raw materials include a first precursor, a second precursor, and a solvent. The first precursor includes lithium sulfide, and the second precursor includes at least one selected from phosphorus pentasulfide, silicon sulfide, germanium sulfide, tin sulfide, sodium sulfide, potassium sulfide, ammonium sulfide, calcium sulfide, and arsenic sulfide. This method has a relatively simple process flow and operation, low energy consumption and cost, and high production efficiency, making it suitable for industrial production. The sulfide solid electrolyte obtained in this way is relatively soft, making it easier to contact the positive and negative electrodes under extrusion conditions during the further preparation of the battery, improving density, thereby facilitating electron transport and reducing losses.

The application belongs to the field of chemical production, and particularly designs a method for preparing arsenic trioxide from arsenic sulfide residue, comprising the following steps: step SA1: mixing and slurrying arsenic sulfide residue with a first residue leaching solution, passing in oxygen, and catalytically oxidizing leaching to obtain first leaching residue and first leaching solution; the first residue leaching solution is a solution comprising sulfuric acid, an iron salt, and nitrate and / or nitrite; step SA2: cooling and crystallizing the first leaching solution to obtain arsenic trioxide product and first arsenic precipitation solution. Compared with the prior art, the scheme of the application can prepare the target product using environmentally friendly oxygen, and since the catalytic components in the first residue leaching solution are consumed as catalysts, the first arsenic precipitation solution can be continuously recycled without a special regeneration step, which is more green, cost-saving, and efficient.

This invention provides a method for photo-oxidative treatment of arsenic sulfide slag, comprising the following steps: adding water to the arsenic sulfide slag to adjust the initial arsenic sulfide mass concentration to 2%-20%, adjusting the initial pH to 3-6, adding 2-10% carbon disulfide extractant, controlling the light source to illuminate from the side, and simultaneously stirring and aerating to carry out photo-oxidative leaching; after leaching, separating the organic phase and aqueous phase, cooling the organic phase to precipitate elemental sulfur, stabilizing the filtrate by adding iron and calcium salts, returning the stabilized pressurized filtrate to the photo-oxidative leaching system, and ensuring the filter residue meets the landfill standards for flexible landfills. This method is simple, requires no added chemicals or additional catalysts for oxidation, and directly utilizes the ubiquitous visible light oxidation in nature to achieve safe landfill disposal of high-arsenic slag, resulting in low disposal costs. Furthermore, the photo-oxidation product directly yields elemental sulfur in the solid phase, achieving resource recycling of sulfur.

The invention belongs to the technical field of resource recycling, and particularly relates to a method for comprehensively recovering tellurium, copper, selenium and arsenic from copper tellurium slag. The method comprises the following steps: oxidizing and roasting the copper tellurium slag at 700-800 DEG C to obtain a copper tellurium composite oxide, carrying out a vacuum carbon thermal reduction reaction to respectively obtain elemental copper and elemental tellurium gas, mixing the mixed gas generated by oxidizing and roasting with a mixed solution containing sulfide and alkali metal hydroxide, and carrying out an oxidation reduction reaction to respectively obtain arsenic sulfide slag and a selenium-containing solution; and reducing the selenium-containing solution by using a sulfite reducing agent to obtain elemental selenium. According to the method, tellurium, copper, selenium and arsenic in the copper tellurium slag can be effectively recovered, the recovery rate is high, the purity of the recovered product is high, and the method is simple in technological process, low in cost, stable in product quality, easy to industrialize and environmentally friendly.

The utility model relates to sulfuration arsenic slag transportation technical field, and disclose sulfuration arsenic slag secondary bagging device, including base, the base top surface weld has one perpendicular slide rail, the slide rail top surface weld has one limit board, its characterized in that: the slide rail sliding connection has a slider. The sulfuration arsenic slag secondary bagging device, through the upward movement quick bagging clamping structure and lock and will new external flexible container bag's bag mouth part and its quick bagging clamping structure connection, loosen the positioning bolt, utilize the restoring force of reset spring clamping and drive the slider clamping of connecting quick bagging clamping structure and shift to the base clamping direction displacement, further realize the quick bagging of new external flexible container bag in the old flexible container bag quick bagging that appears seal loose or opening, and use the belt and tighten, simple operation avoids operator directly and appears the packaging of sulfuration arsenic slag that outer package seal loose or opening, improved the security of secondary bagging.

This invention relates to a method for the co-treatment and recovery of valuable elements from high-arsenic alkaline wastewater and arsenic sulfide slag, comprising the following steps: placing the high-arsenic alkaline wastewater in a reaction tank, slowly adding arsenic sulfide slag and a small amount of oxalic acid to the high-arsenic alkaline wastewater to obtain sulfur slag and arsenic-rich wastewater; placing the arsenic-rich wastewater from step 1 in a reaction tank, and then adding oxalic acid to the reaction tank to obtain arsenic trioxide and low-arsenic wastewater; placing the low-arsenic wastewater obtained in step 2 in a reaction tank, and then adding a sulfiding agent to the reaction tank to obtain arsenic sulfide slag and arsenic-removed wastewater; neutralizing the arsenic-removed wastewater with lime to obtain gypsum and reclaimed water. This invention, by co-treating high-arsenic alkaline wastewater and arsenic sulfide slag, can achieve the goal of "using waste to treat waste and turning waste into treasure," and has advantages such as low investment in treatment equipment, reasonable treatment process, high treatment efficiency, and low treatment cost. It has profound significance for improving the economic benefits of enterprises and pursuing a green and sustainable development path.

The utility model relates to the technical field of arsenic sulfide residue treatment, and disclose a rigid landfill yard in arsenic sulfide residue's warehousing and bag breaking treatment device, including the butt joint platform, the butt joint platform surface sets up the opening of the width more than arsenic sulfide residue package bag length, and the inside interval of opening is equipped with a plurality of cutting knives. The utility model discloses that the arsenic sulfide residue package bag slides to the opening, and the roller closest to the guide plate is pulled to the opening by the friction force formed when contacting the arsenic sulfide residue package bag for the first time, and the arsenic sulfide residue package bag is adhered to the cutting knife due to its own weight and the pressure of the roller. At this time, the cutting knife cuts the arsenic sulfide residue package bag. As the arsenic sulfide residue package bag is continuously contacted and moved by the multiple rollers, the arsenic sulfide residue package bag is completely cut open. Then, the arsenic sulfide residue package bag is moved out of the butt joint platform by the roller located behind the opening and falls into the rigid landfill warehouse. The device achieves the beneficial effect of automatically breaking the arsenic sulfide residue package bag and processing the arsenic sulfide residue into the warehouse.

This invention belongs to the field of metallurgical technology and relates to a method for the comprehensive recovery of valuable elements from waste acid in non-ferrous smelting. The method includes the following steps: S1, mixing waste acid with pyrrhotite and reacting under a sulfur dioxide atmosphere; after the reaction, copper slag and copper-removing liquid are obtained through solid-liquid separation; S2, introducing H2S gas into the copper-removing liquid obtained in step S1; after the reaction, arsenic sulfide slag and arsenic-removing liquid are obtained through solid-liquid separation. This invention utilizes the selective reaction of FeS in pyrrhotite with CuSO4 in the waste acid to form insoluble copper sulfide precipitate. Simultaneously, under the protection of a sulfur dioxide atmosphere, arsenic in the waste acid remains dissolved and does not precipitate. The synergistic effect of these two factors effectively separates copper and arsenic elements from the waste acid, and the separation steps are simple and efficient.