24 results about "Arsenic sulfide" patented technology

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 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 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 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 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 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.

The invention belongs to the technical field of metallurgy, and discloses a method for efficiently recovering multiple elements in smelting smoke dust. The method comprises the following steps that S1, smoke dust is leached through sulfuric acid and hydrogen peroxide, zinc, copper and arsenic enter a solution, and lead, gold and silver are left in slag; s2, activated arsenic sulfide is added into the pickle liquor, copper is selectively precipitated to obtain copper sulfide slag, and meanwhile arsenic is further enriched in the solution to obtain arsenic-rich liquor; and S3, the acid leaching residues, the copper sulfide residues and the arsenic-rich liquid are treated correspondingly, and lead, gold, silver, copper, arsenic trioxide and zinc sulfate are recycled. According to the method, efficient separation and full-quantification recovery of multiple metals are achieved, especially harmful arsenic is converted into valuable products, the technological process is clean and environmentally friendly, the resource utilization rate is high, and economic benefits and environmental benefits are remarkable.

The invention discloses a cooperative control method for arsenic content of anode copper in copper pyrometallurgy, and belongs to the technical field of non-ferrous metal metallurgy. The method comprises the following steps: (1) preparing spherical arsenic sulfide slag for later use; (2) detecting the arsenic-containing mass fraction of matte produced in the side-blowing smelting process every 2 hours, when the arsenic-containing mass fraction of the matte is smaller than or equal to 0.3%, adding the spherical arsenic sulfide slag prepared in the step (1) in the top-blowing converting process, and meanwhile, adjusting parameters of the top-blowing converting process and parameters of an anode refining process; and (3) continuously adding the spherical arsenic sulfide slag until the arsenic mass fraction of four continuous matte samples produced in the side-blowing smelting process is detected to be greater than 0.3%. According to the method, the arsenic sulfide slag is introduced in the top-blowing converting procedure, on one hand, the arsenic mass fraction of anode copper is effectively increased, the anode copper meets the electrolytic refining requirement, on the other hand, the treatment cost of the arsenic sulfide slag is effectively reduced, the environmental protection pressure is relieved, and resource utilization of part of the arsenic sulfide slag is achieved.

The invention provides a method for inhibiting arsenopyrite by coupling Eh potential pre-regulation and nano-silica sol, and belongs to the technical field of mineral processing. The method comprises the following steps: firstly, adding a potential regulating agent in the ore grinding process to pre-regulate the potential of ore pulp to 100-400mV so as to create an electrochemical condition for selective inhibition of arsenopyrite; then nano silica sol is added as an arsenopyrite inhibitor, and preferential and firm adsorption of the silica sol on the surface of the arsenopyrite is realized by utilizing the physicochemical property difference between the surface of the arsenopyrite and the surface of a target mineral after potential pre-regulation and control; and finally, a collecting agent and a foaming agent are added for flash flotation, useful mineral foam is rapidly floated out, concentration operation is conducted, rough concentrate with the arsenic content smaller than or equal to 0.5% is obtained, and the arsenopyrite subjected to deep inhibition is left in a flotation tank and enters tailings. Through the coupling effect of Eh potential pre-regulation and nano silica sol, high-selectivity and high-strength inhibition of arsenopyrite is achieved, the arsenic content of concentrate is remarkably reduced, and the method has the advantages of being free of pollution, low in cost, high in separation efficiency and the like and is suitable for green separation of complex arsenic-containing sulfide ore.

This invention discloses a method for treating and reusing arsenic sulfide slag, belonging to the field of arsenic sulfide slag resource recovery technology. This method separates arsenic and metal elements from arsenic sulfide slag in one step by adding sodium hydroxide, and simultaneously converts arsenic and some sulfur into arsenic trioxide and elemental sulfur by adding oxygen and sulfur dioxide. This invention effectively separates and recovers valuable metals, sulfur, and arsenic from arsenic sulfide slag through a wet process, converting them into economically valuable industrial raw materials. It reduces the loss of valuable metals, avoids environmental risks caused by the leakage of toxic substances, and has a relatively simple process flow, combining environmental and economic benefits.

The invention relates to the technical field of chemical metallurgy, in particular to a method for treating a high-arsenic copper-containing material. The method comprises the following steps: S1, carrying out acid leaching on the copper smelting slag and the white smoke dust, and carrying out solid-liquid separation to obtain acid leaching slag and acid leaching liquid; s2, mixing the pickle liquor with arsenic sulfide slag, performing copper deposition reaction, and performing solid-liquid separation to obtain copper deposition slag and liquid after copper deposition; s3, carrying out oxygen pressure leaching on the copper deposition post-solution, and carrying out solid-liquid separation to obtain oxygen leaching residues and an oxygen leaching solution; s4, mixing the oxygen immersion liquid with the soot of the steel mill, stirring until the pH value is 5-5.4, and carrying out solid-liquid separation to obtain goethite slag and iron-removed liquid; wherein the goethite slag obtained in the step S4 is returned to the oxygen pressure leaching process in the step S3, and the oxygen pressure leaching conditions are as follows: the temperature is 150-170 DEG C, the pressure is 1-1.4 MPa, the oxygen partial pressure is 0.5-0.8 MPa, and the time is 3-4 hours.

This application discloses a treatment system and process for recovering rhenium from arsenic sulfide slag. The system uses an oxygen pressure reduction unit to convert rhenium in the arsenic sulfide slag into soluble rhenium ions and arsenic into solid-phase arsenic trioxide. The rhenium-containing solution, separated by a solid-liquid separation unit, is filtered by a pretreatment unit and then sent to an ion exchange unit. A three-in-one-standby cyclic replenishment series adsorption resin group selectively adsorbs the rhenium-containing solution. An online rhenium concentration detector and controller enable the switching and offline regeneration of the saturated first column in the series adsorption resin group. The regenerated rhenium-rich solution is concentrated, re-dissolved, filtered, and cooled to crystallize in an evaporation-redissolution-crystallization unit to obtain ammonium rhenium crystals. This application utilizes oxygen pressure reduction to simultaneously complete the conversion and separation of arsenic in the leaching process, simplifying the process flow. The three-in-one-standby resin group ensures continuous production, and the evaporation-redissolution-crystallization unit improves the purity of the recovered rhenium, achieving efficient and high-purity rhenium recovery.

The invention discloses a device and a method for quickly removing arsenic from high-arsenic zinc-rich acid liquor, and belongs to the technical field of hydrometallurgy. The device specifically comprises a stock solution tank, a hydrogen sulfide synthesis system, a nitrogen supply system, a tail gas treatment system, a reaction kettle, a filter pressing system, a vulcanized liquid tank and a circulating pump, a gas-liquid coupling device is arranged on the upper middle portion in the reaction kettle, hydrogen sulfide gas and stock solution enter the reaction kettle through the gas-liquid coupling device, and after the hydrogen sulfide gas and stock solution reach a set liquid level, the reaction kettle is started; the pressure interval of a reaction system is gradually increased by opening and closing a pressure sensor at the top of the reaction kettle and a hydrogen sulfide inlet valve, and meanwhile, redundant arsenic sulfide slag is intermittently discharged, so that arsenic in a stock solution is efficiently removed, and zinc in the stock solution is almost not lost. The gas-liquid contact reaction efficiency is greatly improved through the double-spraying design of the gas-liquid coupling device in the stock solution feeding stage and the reaction solution circulating stage and intermittent deslagging of the reaction kettle.

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 a method for preparing an arsenic nano material by taking an arsenic sulfide-amine solution as an arsenic source, which comprises the following steps: mixing arsenic sulfide and an amine solvent to obtain the arsenic sulfide-amine solution; heating and stirring the arsenic sulfide-amine solution and the polyol solution under the protection of inert gas to obtain a reaction solution containing an arsenic nano material; the arsenic nano material comprises simple substance arsenic; the polyol solution comprises an alkaline hydroxide and a liquid polyol. The invention belongs to a method for controllably synthesizing an arsenic nano material in a weak reduction system by taking an arsenic sulfide-amine solution as an arsenic source. According to the method, arsenic sulfide is dissolved in an amine solvent to form a stable precursor, so that arsenic species are in a relatively activated state, and the arsenic sulfide is gradually reduced to elementary substance arsenic in an alkaline polyol system under the condition of no participation of a strong reducing agent, so that the reaction rate is effectively reduced, and the controllability of the reaction process is improved.