163 results about "Hydrometallurgy" patented technology

The application discloses a potassium fluorotantalate crystallization purification method, and relates to the technical field of tantalum hydrometallurgy and fluorotantalate crystallization purification. The method comprises the following steps: filtering a tantalum-containing fluorine acid solution, adding a potassium source and a tantalum-niobium separation type composite crystallization regulator, stirring and complexing, seed induction, controlled cooling crystallization, graded removal of the regulator, solid-liquid separation, and potassium fluoride containing fluorine acid washing to obtain primary purified potassium fluorotantalate crystals, and then redissolving the primary purified potassium fluorotantalate crystals in a fluorine-containing acid solution, correcting the K / Ta molar ratio, repeatedly regulating and crystallizing, graded removal of the regulator, washing, and drying to obtain high-purity potassium fluorotantalate. The regulator can reduce the entrainment of niobium impurities and reduce the residual amount of the regulator itself, thereby improving the purity of the product and the Ta yield.

This invention relates to the field of hydrometallurgical technology and discloses a method for purifying and recovering ammonium perrylate using a combination of electrodialysis and ion exchange. The method first adjusts the pH of the rhenium-containing feed solution, then selectively enriches perrylate ions using electrodialysis to obtain a high-concentration rhenium-rich solution. Subsequently, the rhenium-rich solution is subjected to deep adsorption purification through an anion exchange column. Next, rhenium is eluted from the saturated resin using an eluent to obtain a pure ammonium perrylate solution. Finally, high-purity ammonium perrylate crystals are obtained through evaporation, concentration, cooling, crystallization, and drying. Optionally, the obtained crystals can be recrystallized to further improve purity. This invention ensures the purity and process stability of the rhenium-rich solution obtained in the pre-enrichment stage, improves the overall adsorption capacity, desorption rate, and reliability of the process operation of the resin, and guarantees the stability of the final ammonium perrylate product purity and the economic benefits of the entire process recovery.

The application discloses a method and a reaction device for synchronously and efficiently removing iron and organic matters, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: taking a leaching solution of a zinc hydrometallurgy purification process, adjusting the pH by using a neutralizing agent a, maintaining the pH between 3.6-4.0, then conveying the solution to a leaching solution storage tank for preheating and stirring, after reaching a set temperature of 50-95 DEG C, injecting the solution into an iron removal reactor, adjusting the pH to be 4.0-5.0, introducing an oxidizing agent, controlling the flow rate to be 10-300 L / h, deeply removing the organic matters and iron ions in the solution, and after the reaction is finished, aging for 1-4 h, and then performing solid-liquid separation. The reaction device comprises a leaching solution storage tank, an iron removal reactor, an oxidizing agent supply system and the like. The application can efficiently and synchronously remove the iron ions and the organic matters in the solution, can greatly reduce the iron removal time, can reduce the catalyst and oxidizing agent consumption, has a good removal effect, and has a good application prospect.

This invention discloses a platinum-based catalyst for the hydrogenation reaction, its preparation method, and an electrode. The catalyst uses orthorhombic niobium pentoxide (T-Nb₂O₅) as a support to support the active component platinum. The support is resistant to strong acids and electrochemical corrosion at potentials above 1.0 V (vs RHE). The catalyst exhibits a hydrogenation reaction current density of not less than 200 mA·cm⁻¹ at 0.45 V (vs RHE). ‑2 In preparation, ammonium niobate oxalate hydrate was used as the niobium source, and the mixture was gelled via a sol-gel method. The gel was then heat-treated at 600-700℃ to obtain an orthorhombic niobium pentoxide support. The pH was adjusted to less than 3, and platinum was reduced with sodium borohydride to prepare the catalyst. This catalyst was then used to fabricate a hydrogen depolarization anolyte gas diffusion electrode with a platinum loading of 0.5-1.0 mg·cm³. ‑2 It can operate continuously and stably for no less than 120 hours with a cell voltage in the range of 1.25-1.45V. The catalyst of this invention has high activity and excellent stability, and can be used as a hydrogen depolarization anode in hydrometallurgy, significantly reducing electrolysis energy consumption and making it suitable for industrial applications.

The utility model discloses a kind of non-ferrous metal wastewater detection processing devices of hydrometallurgy, it is related to metal wastewater treatment technical field.The utility model includes liquid storage barrel, the inside of the liquid storage barrel is provided with cleaning mechanism.The utility model is provided with cleaning mechanism, after detecting wastewater solution, when driving motor drives rotating rod rotation, it will drive connecting sleeve and multiple scrapers to carry out synchronous rotation, and then make three scrapers to the dirt on the inner wall of liquid storage barrel is washed, ensure that the neatness of the environment in liquid storage barrel and the clarity of liquid solution, prevent the wastewater solution to be detected subsequently received pollution, in the process of connecting sleeve rotation, it will drive three sliding rods to carry out synchronous rotation, sliding rod drives internal screw block to rotate, so that internal screw block will move upwards or downwards when rotating, so that the inner wall of liquid storage barrel is washed by the cleaning brush on three connecting rods, cooperate three scrapers to further improve the cleaning effect of overall device.

A comprehensive utilization method for valuable elements in hydrometallurgical slag of laterite nickel ore, comprising the following steps: S1. placing an iron-aluminum slag produced by laterite nickel ore hydrometallurgy in a tube furnace, and introducing an HCl gas stream for a one-stage distillation at 185-290° C. to obtain a one-stage distillation tail gas and a one-stage distillation residue; and condensing the one-stage distillation tail gas to obtain anhydrous AlCl3; S2. introducing an HCl gas stream to the one-stage distillation residue for a two-stage distillation at 320-500° C. to obtain a two-stage distillation tail gas and a two-stage distillation residue; and condensing the two-stage distillation tail gas to obtain anhydrous FeCl3; S3. subjecting the two-stage distillation residue to a leaching treatment by using a leaching solution to obtain a leaching residue and a leaching solution; subjecting the leaching solution to a scandium precipitation treatment to obtain a scandium precipitate and a de-scandiumed liquid; S4. adjusting the pH value of the de-scandiumed liquid to obtain an MHP. The obtained aluminum, iron, and scandium products have high purity and high recovery.

The application provides a process for refining Ag from the precipitate obtained by washing OLED silver target material with hydrochloric acid, and belongs to the technical field of hydrometallurgy. The process for refining Ag from the precipitate obtained by washing OLED silver target material with hydrochloric acid comprises the following steps: raw material pretreatment: drying and crushing the raw material; crude preparation: mixing the pretreated raw material with hydrochloric acid, adding iron blocks, controlling the temperature, stirring and reacting, filtering and washing after the reaction, and collecting the solid phase and the liquid phase respectively; refining: dissolving the obtained solid phase product with nitric acid, collecting the solid and liquid phases respectively, recycling the solid phase into the raw material of the first step, and adding red copper to the liquid phase, filtering and washing after standing for a period of time, and collecting the solid and liquid phases respectively. The process for refining Ag from the precipitate obtained by washing OLED silver target material with hydrochloric acid can effectively reduce the cost, recycle the raw material, and has good social and economic benefits.

The utility model provides a temperature control system and an oxygen pressure leaching device, and relates to the field of hydrometallurgy. The temperature control system comprises a heat exchange piece, a first pipeline assembly and a second pipeline assembly. The heat exchange piece is arranged in the reaction kettle, the heat exchange piece is provided with a heat exchange cavity, and the first pipeline assembly and the second pipeline assembly are both communicated with the heat exchange cavity; the first pipeline assembly comprises a first pipeline and a second pipeline which are connected in parallel, the first pipeline is used for bearing a cooling medium, and the second pipeline is used for bearing a heating medium; the first pipeline, the heat exchange chamber and the second pipeline assembly form a first flowing path; the second pipeline, the heat exchange cavity and the second pipeline assembly form a second flowing path. The temperature control system provided by the utility model solves the technical problems of high cost and high manufacturing difficulty of a reaction kettle temperature control method in the prior art.

The application discloses a kind of dehydration and recycling method of electrolytic manganese dioxide leaching residue, it is related to the field of hydrometallurgy and chemical solid-liquid separation technology.The method is aimed at the technical problems of low dehydration efficiency, insufficient manganese element recovery and high comprehensive energy consumption in the prior art, after neutralization and composite flocculant flocculation of leaching solution, multi-stage electric field treatment is carried out in turn, including applying alternating electric field in the sedimentation tank for pre-aggregation, applying direct current electric field in plate and frame filter press for pressure filtration dehydration and applying pulse electric field before unloading for deep dehydration, finally unload filter cake and collect filtrate.The method is mainly used for efficient dehydration of leaching residue in the production process of electrolytic manganese dioxide and maximization of manganese resource recovery, to realize energy saving and emission reduction and resource recycling.

The application provides a gold mine rolling bottle leaching experiment system and experiment method, relates to the hydrometallurgy technical field, and the system comprises: the central controller and the multi-axis mechanical arm which are electrically connected; the central controller is used for obtaining and analyzing a preset experiment task to obtain a job instruction sequence; according to each job instruction, a control signal is sent to the multi-axis mechanical arm; the multi-axis mechanical arm is used for grabbing a rolling bottle to a weighing platform when receiving an empty bottle grabbing signal; according to a solid sample adding signal, a sample adding speed is determined, and the gold mine powder is added to the rolling bottle at the sample adding speed; when receiving a first moving signal, the rolling bottle is transported from the weighing platform to a liquid sample adding station; when receiving a liquid sample adding signal, the rolling bottle is injected with acid and alkali liquid; when receiving a cap screwing signal, the rolling bottle is transported to a cap screwing station and is sealed by screwing a cap; when receiving a second moving signal, the rolling bottle is transported to a preset clamping position of a rolling bottle machine to realize rolling bottle leaching. The application improves the experiment efficiency of the gold mine rolling bottle leaching experiment.

The utility model discloses a material adding device belongs to the field of hydrometallurgy. The problem of uneven feeding and dust flying everywhere caused by manual bag breaking of additive in the hydrometallurgy process is solved. The utility model discloses a material receiving bin, and a dust collector is arranged on the upper portion of the material receiving bin. The dust collector is a jacketed hollow structure, and a grid is uniformly arranged on the inner wall of the dust collector. The grid is in communication with the air outlet of the outer wall of the dust collector, and the air outlet is connected with a draft fan. The dust collector is arranged on the inner wall of the material receiving bin, so that the dust can be recycled through the dust collector after the bagged additive is broken. The environmental pollution is reduced. Under the action of the draft fan, the recycled dust can be used again, and the material loss is avoided.

This invention relates to the field of hydrometallurgical technology, specifically disclosing a molybdenum removal extractant suitable for sulfuric acid-based waste acid systems and its preparation method. The method includes: S1. Dehydrating aromatic kerosene to obtain a dehydrating diluent; S2. Sequentially adding tri-n-butyl phosphate, di(2-ethylhexyl)phosphoric acid, and a phase modifier to the dehydrating diluent, stirring to obtain a pre-extractant; S3. Pre-equilibrium liquid prepared with sulfuric acid and sodium sulfate, mixing the pre-extractant and the pre-equilibrium liquid by vibration, separating to obtain an organic phase, controlling the TBP·H₂SO₄ addition ratio in the organic phase to obtain an activated organic phase; S4. Adding an antioxidant to the activated organic phase, filtering, aging, to obtain the finished product. This invention, by controlling the preparation process of the molybdenum removal extractant, can obtain a finished extractant with stable phase behavior and high molybdenum removal selectivity under high acid / high sulfate conditions, facilitating continuous industrial operation.

The present application relates to water treatment, and provides a treatment method of molybdenum tail liquid in hydrometallurgy, which comprises the following operation steps: (1) pre-filtering, filtering the tail liquid after adjusting the pH of the tail liquid, so that the SS after filtering is less than 15 mg / L; (2) ultrafiltration, performing ultrafiltration on the solution obtained in step (1), and obtaining ultrafiltration liquid and concentrated water after ultrafiltration; (3) electrodialysis concentration, performing electrodialysis concentration on the ultrafiltration liquid obtained in step (2), and obtaining electrodialysis concentrated water and electrodialysis fresh water after electrodialysis concentration; (4) performing adsorption and filtration operations on the electrodialysis concentrated water obtained in step (3); (5) nanofiltration, performing nanofiltration separation on the liquid obtained in step (4), and obtaining sodium chloride solution, sodium sulfate solution and mother liquor, and returning the mother liquor to step (1) for treatment. The treatment method of molybdenum tail liquid in hydrometallurgy can efficiently treat high-salt molybdenum tail liquid, and the treated tail liquid can be directly reused.

This invention discloses a method for the synergistic control and removal of organic matter in the hydrometallurgical process of zinc smelting, belonging to the field of hydrometallurgical technology. It includes the following steps: incorporating the TOC content of manganese ore powder and iron removal agent into quality monitoring and limiting content thresholds; controlling the addition amounts of flocculant, bone glue, and organic cobalt removal agent; and simultaneously adjusting the concentrations of zinc ions and soluble silicon in the supernatant to reduce liquid viscosity, thereby reducing the introduction of impurities at the source; adding activated carbon to the purification process to adsorb organic matter; and adding a waste liquid circulation filtration system to the electrolysis process, while selectively adding modified activated carbon to remove suspended solids, organic matter, colloids, and harmful impurity ions from the electrolytic waste liquid. This invention achieves three main benefits: first, it establishes a synergistic removal system for fine suspended solids, colloids, organic matter, and impurity ions; second, it increases the electrolysis current efficiency to over 90% and reduces cell voltage; and third, it improves the utilization efficiency of fresh liquid and reduces overall production costs.

The invention relates to hydrometallurgy of rare metals, in particular, to lithium sorption recovery from natural brines and wastewaters. The method comprises introducing a feed lithium-containing brine to a sorption-desorption concentrating module in a form of a vertical column filled with an inorganic sorbent being a chlorine-containing lithium aluminum double hydroxide. After sorption, the lithium saturated sorbent is washed with 27% ammonium chloride solution in the amount of 80-150% of the sorbent volume in the column and flowing through the column in the direction reverse to the direction of the feed brine flow. Then lithium desorption from the sorbent is performed with desalinated water to obtain a lithium enriched solution containing ammonium chloride impurities, which is then evaporated followed by ammonium chloride sublimation from the dry mixture. The effect of the invention is the reduced lithium losses with the washing solution and increased purity of the target product (LiCl concentrate).

The application belongs to the field of hydrometallurgy, and an embodiment provides a method for selectively extracting uranium from a high-concentration sulfuric acid medium. The method comprises the following steps: providing an extraction organic phase, wherein the extraction organic phase comprises a compound and a diluent; mixing and extracting the extraction organic phase and a solution, wherein the solution comprises uranium and acid, and the sulfuric acid concentration of the solution is at least 1 g / L, wherein the compound has a structure shown in formula I; formula I, R1, R2 and R3 are independently selected from any one of C3-C18 linear, branched or cyclic aliphatic hydrocarbon groups and C6-C18 aromatic groups; and the diluent comprises at least one of sulfonated kerosene, aviation kerosene, n-hexane and cyclohexane. The method of the embodiment of the application is simple and easy to implement, and can efficiently separate uranium from coexisting impurity metal ions.

A method for efficiently recovering cobalt and nickel from waste lithium battery extract belongs to the field of hydrometallurgical technology. The technical problem solved by this invention is to provide a low-cost, low-pollution, and high-efficiency method for recovering cobalt and nickel from waste lithium battery extract. Specifically, it discloses a method using sodium oxalate solution to back-extract from a nickel-cobalt containing extract, obtaining a back-extract, then precipitating by adjusting the pH, and finally obtaining cobalt oxalate and nickel oxalate products after drying. The method includes the following steps: (1) preparing a sodium oxalate solution; (2) back-extraction; (3) cobalt precipitation; (4) nickel precipitation; (5) washing and drying the precipitate. This method is not only simple to operate, highly efficient, low-cost, and environmentally friendly, but also regenerates the extract, making it suitable for industrial production.

The present application relates to a kind of U-shaped titanium copper clad aluminum base lead dioxide composite anode plate for non-ferrous electro-deposition and preparation method thereof, belong to hydrometallurgy technical field.The composite anode plate of the present application includes titanium copper clad aluminum rod conductive beam, transition titanium copper clad aluminum plate, U-shaped titanium copper clad aluminum rod manganese dioxide composite anode and longitudinal conductive reinforcing rib, titanium copper clad aluminum rod conductive beam and transition titanium copper clad aluminum plate include secondary aluminum layer, copper layer and titanium layer from inside to outside in sequence;U-shaped titanium copper clad aluminum rod manganese dioxide composite anode rod and longitudinal conductive reinforcing rib include titanium copper clad aluminum rod matrix, tin-sb-bi-ce-nickel composite oxide Sn-Sb-Bi-Ce-NiO x bottom layer, manganese-cerium-copper composite oxide Mn-Ce-CuO x Middle layer and cerium-doped-cobalt γ-MnO2 Composite active layer.Compared with traditional lead-silver multi-element alloy, the anode life of the composite anode plate of the present application can be prolonged by 2 times, the cell voltage is reduced by more than 12%, the current efficiency is increased by more than 4%, and the quality of cathode product is high.

The application provides a method for recovering chlorinated rare earth from rare earth materials, and belongs to the technical field of rare earth hydrometallurgy. The method comprises the following steps: uniformly mixing the rare earth materials with a calcium-containing compound and carbon powder, heating, and reacting in a molten state to obtain roasted ore; crushing and grinding the roasted ore, uniformly mixing the roasted ore with water, and then adding hydrochloric acid to perform reaction 2; after the reaction 2 is completed, solid-liquid separation is performed to obtain a chlorinated rare earth solution and a leaching residue; and the temperature of the reaction 1 is 1500 DEG C-2000 DEG C, and the time is 0.5-2h. In the method, the rare earth materials do not need to be pretreated by grinding and sieving, and can directly react with the calcium-containing compound and the carbon powder, so that the process flow is short. The rare earth decomposition rate of the slag is above 98%, the rare earth leaching rate is above 96%, and the recycling and utilization of the rare earth resources are effectively realized.

An electrochemically mediated, hydrometallurgical method is provided for extraction of nickel, zinc, lead, silver, molybdenum, and / or copper from sulfide minerals. These metal concentrates, such as pentlandite, pyrrhotite, pyrite, sphalerite, galena, Ag2S, MoS2, etc., are contacted with nitric acid and cerium(IV) nitrates, cerium(IV) methanesulfonate, and / or cerium(IV) sulfate, as oxidative leaching agents to preferentially leach the target metals contained therein. The strong oxidizing capacity of cerium(IV) enables rapid dissolution of metal sulfides under ambient conditions. Cerium(IV) can be electrochemically regenerated and recycled for treatment of additional sulfide minerals. Target metal products can be extracted via processes such as solvent extraction and precipitation, enabling complete recovery, e.g., of nickel from pentlandite.

This invention relates to the field of hydrometallurgical technology and discloses a method for separating and purifying beryllium in beryllium-containing solutions. It aims to solve the problems of severe iron-aluminum co-extraction, easy precipitation during back-extraction, the need for high-temperature back-extraction, high oxalic acid consumption, complex process flow, and high energy consumption and cost in the existing P204 extraction system for purifying beryllium-containing solutions. This invention pre-treats the iron- and beryllium-containing solution with oxidation, adjusts the pH, and then uses ketoxime, amine, or carboxylic acid extractants for deep iron removal, which can remove more than 99% of iron impurities. The pH of the iron-removed solution is then adjusted, and beryllium is extracted using the P204 system. After washing with low-concentration oxalic acid, back-extraction with room-temperature alkaline solution, and regeneration of the organic phase, deep separation of beryllium from iron and aluminum impurities is achieved.

This invention relates to a method for the synergistic separation of iron and copper-zinc in zinc sulfate solution using ultrasonic-enhanced goethite, belonging to the field of hydrometallurgical technology. This invention separates iron and copper-zinc from zinc sulfate solution containing Fe. 2+ Cu 2+ and Zn 2+ An acidic zinc sulfate solution was placed in an ultrasonic field, and an oxidant was slowly added to pre-oxidize the solution until Fe was added. 3+ A pre-oxidized acidic zinc sulfate solution with a concentration of 0.01~1.00 g / L was obtained. Goethite seed crystals and a copper-zinc liquid phase stabilizer were added to the pre-oxidized acidic zinc sulfate solution and mixed evenly. A neutralizing agent was added under ultrasonic conditions to adjust and control the pH of the solution system to 2.5~4.0, and the reaction proceeded. This caused the iron in the solution system to form a goethite precursor and directionally crystallize into α-FeOOH. At a pH of 2.5~4.0, the ultrasonic density was adjusted to promote the directional crystallization of Fe until the Fe concentration in the solution did not exceed 0.1 g / L. This allowed the directionally crystallized α-FeOOH particles in the solution system to grow in an orderly manner and inhibited disordered flocculation and agglomeration. Solid-liquid separation yielded a goethite precipitate with low copper and zinc entrainment and a copper-zinc enriched purification solution. This invention can achieve efficient removal of iron and low loss retention of copper and zinc.

This application discloses a method for recycling wastewater from the hydrometallurgical process of laterite nickel ore, comprising the following steps: high-pressure acid leaching of laterite nickel ore is subjected to circulating leaching, CCD washing, iron and aluminum removal, and MHP precipitation treatment, followed by filtration to obtain a post-MHP precipitation liquid; alkali is added to this liquid to remove manganese, and filtration is performed to obtain post-MHP precipitation and manganese removal wastewater; the post-MHP precipitation and manganese removal wastewater is subjected to ion exchange to recover nickel and cobalt, yielding an ion-exchange liquid and a enriched nickel-cobalt solution, which is reused in the CCD washing process; the ion-exchange liquid is treated by extraction or ion-selective membrane treatment to obtain a magnesium-rich solution and a magnesium-poor solution; part of the magnesium-rich solution is reused in the MHP precipitation process, and the remaining portion is evaporated and crystallized to obtain magnesium sulfate; the magnesium-poor solution is subjected to bipolar membrane electrolysis, and the resulting sodium hydroxide solution is reused in the iron and aluminum removal and MHP precipitation processes, while the sulfuric acid solution is reused in the high-pressure acid leaching process. This application improves the recycling rate of wastewater from the hydrometallurgical process of laterite nickel ore, and the recovered intermediate products can be further purified or directly reused in previous processes.

This invention discloses a method for recovering gold from gold-containing materials using ultrasound-assisted persulfate extraction, belonging to the field of hydrometallurgical technology. The method involves mixing finely ground gold-containing materials, an acetonitrile aqueous solution, and persulfate, followed by ultrasound-enhanced leaching in an alkaline environment. After leaching, solid-liquid separation is performed to obtain a leachate and a leaching residue. The leachate is then evaporated and crystallized to achieve solvent recovery and reuse, as well as separation of the gold-containing solids. The gold-containing solids are then reduced and calcined to obtain elemental gold. Compared to traditional cyanide and aqua regia leaching processes, this invention eliminates the need for toxic substances and catalysts, significantly improving the selective extraction efficiency of precious metals through ultrasound enhancement. Simultaneously, the solvent can be recycled, reducing costs and avoiding excessive waste residue. This method is green, safe, and highly efficient, possessing significant potential for industrial applications.

This invention belongs to the field of hydrometallurgical technology, specifically relating to a method for enhanced gold extraction from cyanide tailings based on magnetically controlled hydrothermal magnetization activation and manganese doping treatment. The method includes: providing cyanide tailings particles; adding the cyanide tailings particles and a biomass reducing donor to an aqueous medium to form a slurry; adjusting the pH of the slurry to obtain an alkaline reaction system; adding a magnetothermal medium of ferric oxide or ferric chloride to the slurry and stirring with MnSO4 to obtain a reaction slurry; placing the reaction slurry in a closed magnetically controlled hydrothermal reactor and conducting a hydrothermal reaction under an external magnetic field; after cooling the reaction product, performing solid-liquid separation; performing graded magnetic separation on the solid phase; leaching the non-magnetic product using a thiosulfate-ammonia system to allow gold to enter the leaching solution; adding a recyclable magnetic gold-capturing carrier to the leaching solution for adsorption and enrichment; recovering the carrier through magnetic separation and regenerating it through analysis to obtain a gold-rich solution; and recovering gold from the gold-rich solution. The above method can stably achieve a synergistic gain in gold extraction and harm reduction under low-temperature hydrometallurgical conditions.

The application discloses a method for separating copper and arsenic in a high-nickel copper-arsenic solution and relates to the technical field of non-ferrous metal hydrometallurgy purification separation and impurity removal, solves the problems of incomplete separation of copper and arsenic in the high-nickel copper-arsenic solution and low valuable metal recovery rate, adopts hydrogen sulfide gas as a single sulfuration agent, realizes effective separation of copper and arsenic through a first-stage sulfuration copper removal, a second-stage sulfuration copper removal and a sulfuration arsenic removal procedure, processes second-stage sulfuration copper residue through a copper residue arsenic removal procedure, processes sulfuration arsenic residue through an arsenic residue nickel removal procedure, and sets up a material circulation system in which copper residue arsenic removal post-liquid enters the second-stage sulfuration copper removal procedure and arsenic residue nickel removal post-liquid enters the sulfuration arsenic removal procedure, so that the method has the advantages of simple technological process, good separation effect, high recovery rate, low operation cost and the like.

The application provides a nickel solution preparation on-line monitoring system and method, and belongs to the technical field of non-ferrous hydrometallurgy; the system comprises a waste liquid receiving tank, an acid adjusting tank, a hydrogen ion on-line detection device and a controller; the hydrogen ion on-line detection device monitors the hydrogen ion concentration of a key area in real time; the controller automatically adjusts the adding amount of acid liquid and fresh water according to the detection signal, and controls the outlet flow in linkage, so that full-automatic acid adjusting and solution preparation are realized. The application can solve the problems of high labor intensity, low precision and poor safety of manual acid adjusting, realize accurate control of the hydrogen ion concentration, improve the qualified rate of acid adjusting, and thus improve the solution preparation efficiency and product quality.

This application discloses a multi-stage overflow tank for laterite nickel ore hydrometallurgical wastewater, comprising an inlet tank and two overflow tank groups. The inlet tank has two overflow outlet gates. The two overflow tank groups are arranged side by side, and each overflow tank group includes multiple overflow tanks arranged longitudinally. The multiple overflow tanks of each overflow tank group are connected end to end through overflow outlets, and the overflow tank at the first end along the water flow direction is connected to the overflow outlet gate. Each overflow tank includes two overflow tank bodies arranged laterally and connected at the bottom. This application connects the two overflow tank groups through the inlet tank to form two overflow paths. Each overflow path, with the cooperation of bottom-connected and end-to-end connected overflow outlets, forms an S-shaped flow channel combining vertical and horizontal levels, improving the floc deposition effect. Furthermore, one overflow path can be selectively closed for easy cleaning, allowing for uninterrupted wastewater treatment.