1533 results about "Hydrometallurgy" patented technology

The invention discloses high-purity hafnium oxide and a preparation method thereof, and relates to the technical field of hydrometallurgy. The preparation method of the high-purity hafnium oxide comprises the following steps: crushing a hafnium oxide raw material to obtain hafnium oxide powder; sequentially carrying out alkali fusion, water immersion and filtration treatment on the hafnium oxide powder to obtain a hafnium hydroxide filter cake; dissolving the hafnium hydroxide filter cake in a sulfuric acid solution to obtain a hafnium sulfate solution; adding sodium sulfate into the hafnium sulfate solution to obtain hafnium-containing double salt; dissolving the hafnium-containing double salt in a sulfuric acid solution, heating, evaporating, cooling and crystallizing to obtain hafnium sulfate crystals; dissolving the hafnium sulfate crystal in concentrated hydrochloric acid to obtain a hafnium oxychloride solution, heating, evaporating, cooling and crystallizing to obtain a hafnium oxychloride crystal; dissolving the hafnium oxychloride crystal in pure water, adding an oxalic acid solution, and precipitating to obtain hafnium oxalate; and calcining hafnium oxalate to obtain high-purity hafnium oxide. The preparation method of the high-purity hafnium oxide is green, environment-friendly, simple and efficient.

The invention discloses a method for activating and precipitating MHP through magnesium, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: S1, mixing a magnesium-containing solution with a sodium hydroxide solution, and carrying out precipitation reaction for 3-5 minutes to obtain a precipitator; s2, immediately mixing a precipitator with the laterite-nickel ore iron and aluminum removed liquid, and then carrying out first-stage nickel and cobalt precipitation reaction to obtain first-stage nickel and cobalt precipitation slurry; s3, performing first thickening treatment on the first-section nickel and cobalt deposited slurry to obtain first dense underflow and first dense overflow; and S4, filtering the first dense underflow to obtain an MHP product. According to the method, after the magnesium-containing solution and the sodium hydroxide solution are mixed, the magnesium solution and the sodium hydroxide solution are controlled to be mixed and react for 3-5 min, then the nickel and cobalt precipitation reaction is immediately carried out, the MHP product with high purity and quality can be obtained, and the whole method is simple and convenient for large-scale industrial application.

The invention provides a gold leaching agent for treating high-carbon gold-bearing minerals and a gold leaching process, and belongs to the technical field of hydrometallurgy. According to the gold leaching agent, guanidinium thiocyanate is used as an agent main body, a hydroximic acid compound is used as a complexing synergist, and soluble inorganic salt of ferric iron is used as a competitive adsorbent. In a leaching system, guanidine thiocyanate can be decomposed to generate guanidine, sodium sulfide, sodium thiocyanate and water. Thiourea anions are converted into cyanamide under the alkaline condition, then cyanamide is slowly released and decomposed into cyanide ions, the cyanide ions are complexed with gold ions, and gold leaching is achieved. Namely, guanidinium thiocyanate has the effect of releasing the cyanide ions step by step, and slow release of the cyanide ions is realized. The gold leaching agent system does not contain cyanide (sodium cyanide, potassium cyanide and the like) and is a clean and environment-friendly agent system, and efficient leaching of gold in high-carbon gold-bearing minerals can be achieved through the synergistic effect of all functional agent components.

The invention discloses lithium battery recycling material powder as well as a preparation method and application thereof, and relates to the technical field of battery recycling. The lithium battery recovery material powder comprises metal compound powder and an elemental carbon material, and the metal compound powder comprises at least one of the following elements: lithium, nickel, cobalt, manganese and iron; the separation index S of the lithium battery recovery material powder is greater than or equal to 0.15 m < 2 > / kg and less than or equal to 43 m < 2 > / kg, S = WDOC * BET, WDOC refers to the mass percent of soluble organic carbon in the lithium battery recovery material powder, and the soluble organic carbon refers to organic carbon which can be dissolved or dispersed in an aqueous solution with the pH value of 1-14; bET refers to the specific surface area of the lithium battery recovery material powder. The separation efficiency is high when the positive electrode material and the negative electrode material in the lithium battery recycled material powder are separated, and when the lithium battery recycled material powder is subjected to hydrometallurgy to extract valuable metal, the good metal leaching rate is achieved in the acid leaching stage.

The invention relates to the technical field of heavy metal wastewater treatment devices, in particular to heavy metal wastewater treatment equipment for molybdenum concentrate hydrometallurgy, which comprises a mixing barrel, a layering plate is fixedly mounted in the mixing barrel, a water inlet pipe is arranged below the mixing barrel in a penetrating manner, a water outlet pipe is arranged above the mixing barrel in a penetrating manner, and the upper end of the layering plate is fixedly connected with a central pipe. A chemical feeding device is arranged in the center pipe, a driving face shell is fixedly installed at the bottom end of the layering plate, a driving device is arranged between the driving face shell and the center pipe, and a blade plate is rotationally installed at the inner end of the driving face shell; through the Karman vortex street effect formed by the front end cambered surface and the tail end sharp corner structure of the water-drop-shaped blade plate in the wastewater flowing process, the tail end of the blade plate swings periodically, and the swinging frequency is automatically adjusted along with the change of the water flow speed, so that the medicine applying speed synchronously changes along with the water flow speed.

The invention relates to the technical field of hydrometallurgy, and particularly discloses preparation methods of ultralow-potassium ammonium molybdate and ultralow-potassium derivatives thereof. The preparation method of the ultralow-potassium ammonium molybdate comprises the following steps that S1, roasted molybdenum concentrate is subjected to primary screening, smashing and re-screening, and a raw material is obtained; s2, adding the raw materials and pure water into a reaction kettle, uniformly mixing, adding an acid solution, adjusting the pH value, introducing compressed air, heating, adjusting the pressure in the kettle, cooling and depressurizing, washing, and carrying out solid-liquid separation to obtain hydrated molybdenum trioxide; s3, mixing molybdenum trioxide hydrate with an ammonia water solution, adding ammonium sulfide, mixing for 1-2 hours, carrying out solid-liquid separation, then adding an adsorbent, mixing for 1-2 hours, cooling, aging for 24-48 hours, and carrying out solid-liquid separation to obtain an ammonium molybdate solution; and S4, concentrating the ammonium molybdate solution according to the specific gravity, and then carrying out cooling crystallization, solid-liquid separation, washing and drying to obtain the ultralow-potassium ammonium molybdate. The ammonium molybdate and the derivatives thereof prepared by the invention have relatively low content of potassium.

The invention discloses a synthesis method of a non-silicon defoaming agent and application of the non-silicon defoaming agent in the field of scandium extraction in hydrometallurgy. The defoaming agent is synthesized by a component A, a component B and a component C through a two-step reaction, the synthesis method comprises the following specific synthesis steps: 1) carrying out esterification reaction on an amino acid substance A and a fatty alcohol substance B to generate an amino ester substance D; and 2) carrying out substitution reaction on the amino ester substance D and a triazine compound C to obtain the non-silicon defoaming agent. The defoaming agent disclosed by the invention is wide in application range, can be applied to links such as a laterite-nickel ore hydrometallurgy front-end scandium extraction method and an MHP hydrometallurgy scandium impurity removal process, is added as an auxiliary agent in the extraction process, and is used for reducing the surface tension of liquid, preventing the formation and enrichment of a third-phase substance and reducing the occurrence of an emulsification phenomenon; the process stability and the output quality are improved, and the method has important industrial application value.

The embodiment of the invention provides a pipeline blockage monitoring method and system for wet metallurgy slurry conveying, and belongs to the technical field of pressure measurement and pipeline blockage monitoring. The method comprises the following steps: collecting multi-point pressure signals along a slurry pipeline, and extracting pressure pulsation amplitudes and phase characteristics in a pump fundamental frequency and frequency multiplication range based on the multi-point pressure signals so as to establish an on-way pulsation transmission sequence; determining equivalent on-way impedance based on comparison between the on-way pulse transmission sequence and a reference working condition, and outputting an initial judgment result for representing a blockage risk; flow temperature and viscosity estimation parameters are introduced based on the initial judgment result to carry out rheological correction on an impedance threshold value, and a high-frequency phase difference is extracted at an elbow section to update a candidate blockage position; and based on the updated candidate blockage position and the corrected impedance threshold, fusing a phase stability index, and generating and outputting a current blockage evaluation result. According to the scheme, early-stage accurate positioning and stable judgment of slurry pipeline blockage can be achieved under complex working conditions.

The invention provides an environment-friendly cyanide-free gold leaching agent and a technology for extracting gold in electronic waste through the environment-friendly cyanide-free gold leaching agent, and belongs to the technical field of hydrometallurgy. A series of environment-friendly cyanide-free gold leaching agents are prepared by designing the environment-friendly cyanide-free gold leaching agents, using non-toxic and renewable biomass resources as raw materials, optimizing the molecular structure level of the raw materials through a series of derivatization means and introducing specific functionalized molecular groups. The problem that an existing cyanide-free leaching agent is difficult to treat electronic waste is solved. On the premise that technology feasibility is met, balance of economy and environment is achieved to the maximum extent, the gold leaching technological process is simple, operation is convenient, the gold leaching technological process conforms to original facilities of existing enterprises, and extra equipment upgrading cost does not need to be input.

A green method for producing a nickel-cobalt-manganese new energy raw material from laterite nickel ore based on hydrometallurgy, mainly comprising ore blending, ore washing, ore separation, pressurization leaching or oxygen pressure leaching, cyclic leaching and neutralization, counter-current washing, multi-segment removal of iron chromium aluminum, multi-segment synthesis of nickel-cobalt-manganese hydroxide, ion extraction, preparation of a nickel-cobalt-manganese mixed salt solution, preparation of a separate nickel-cobalt-manganese salt solution, preparation of a nickel-cobalt-manganese mixed salt crystal, preparation of a separate nickel-cobalt-manganese salt crystal, preparation of a ternary precursor, comprehensive treatment of wastewater, waste gas, and waste residue, and other techniques and processes. Efficient simultaneous extraction of nickel-cobalt-manganese is achieved; ferrochrome, copper, zinc, scandium and other valuable metal elements are effectively recovered; a nickel-cobalt-manganese raw material meeting the requirement of a high-nickel ternary battery is produced; and a ternary precursor material directly used for manufacturing of the ternary battery is manufactured.

The invention discloses a deep learning and automatic control chemical reactor and a resource recovery method, and relates to the technical field of hydrometallurgy, and the deep learning and automatic control chemical reactor comprises a chemical reactor, a motor, a heating device, a monitoring device, a data center and a PLC control system. Based on a PLC control system, a Transform-LSTM time sequence prediction model is integrated, so that real-time monitoring of parameters such as mixed liquid temperature, reaction chamber pressure, mixed liquid viscosity, conductivity and the like in a wet leaching reaction process can be realized; and the heating power of the heating device, the rotating speed of the motor, the raw material adding amount of the feeding port, the mixed material discharging time of the discharging port and the air displacement of the air exhaust port can be automatically and accurately controlled. The problems that stirring efficiency is low, parameter regulation and control are lagged, and manual experience is relied on are solved, through a predictive control strategy, the real-time monitoring and dynamic regulation level is remarkably improved, the wet leaching process is optimized, energy consumption is reduced, the high-grade metal leaching efficiency is improved, and the method is suitable for various wet metallurgy processes.

The invention belongs to the field of hydrometallurgy, and particularly relates to an extraction organic phase for selectively extracting niobium in a niobium-containing sulfuric acid solution and an extraction method, the extraction organic phase comprises a component a, a component b and a hydrophobic solvent; wherein the component a is a compound with a structure # imgabs0 # as shown in a formula 1; the component b comprises at least one of TBP (tributyl phosphate), MIBK (methyl isobutyl ketone), sec-octanol or isooctanol; r1 is alkyl of C1-C2, and R2 is alkyl of C1-C2; r < 2 > is alkyl of C < 7 > to C < 11 >; a is HCO3 <-> or CO3 < 2->; n is the absolute value of the valence of A. Based on the combination of the component a and the component b, the extraction rate of niobium in the sulfuric acid solution and the extraction separation selectivity of niobium and other elements can be further improved based on the combination and synergy of the components.

The invention discloses a preparation method of a polymeric cyanamide low-toxicity gold leaching agent, and belongs to the field of hydrometallurgy. The preparation method comprises the following steps: uniformly mixing urea, sodium carbonate and ferrous chloride and finely grinding; then putting the fine grinding material into a high-temperature heating container, gradually raising the temperature, and preserving the heat; gradually cooling the reaction product to room temperature along with the furnace; and finally, a reaction product is crushed and ground into powder, and the polymeric cyanamide low-toxicity gold leaching agent is obtained. The synthetic raw materials of the gold leaching agent are simple, cheap and easy to obtain, the synthetic process is simple and easy to regulate and control, and the synthetic cost is low. The gold leaching agent obtained through the method is low in toxicity, the gold leaching speed is high, the gold leaching rate is high, and leaching tailings are common solid waste and are easier to treat.

The invention provides a method for recycling scandium, iron and aluminum from acid leachate through fractional precipitation, and belongs to the field of hydrometallurgy. The method comprises the following steps: adding a reducing agent into an acid leaching solution to obtain a first modified leaching solution; adding a stable complexing agent into the first modified leaching solution to obtain a second modified leaching solution; adding a pH regulator into the second modified leaching solution, and regulating the pH value of the second modified leaching solution to 3.5-4.5 to obtain a coarse scandium product and a scandium precipitation solution; an oxidizing agent is dropwise added into the scandium precipitation solution, and an iron product and an iron precipitation solution are obtained; and adding a pH regulator into the iron precipitation liquid to regulate the pH value of the iron precipitation liquid to be greater than or equal to 6.0, and carrying out ultrasonic enhanced aluminum ion precipitation to obtain an aluminum product and an aluminum precipitation liquid. Selective modification of metal ions is achieved by adding a reducing agent and a complexing agent, scandium is precipitated through pH regulation and control, iron is precipitated through oxidation regulation and control, and finally complexation and precipitation of aluminum are blocked, so that the separation efficiency of scandium, iron and aluminum in the acid leaching solution is improved at the same time.

The invention relates to the technical field of hydrometallurgy, in particular to a method for selectively leaching and separating cobalt and manganese from crude cobalt hydroxide leaching residues. The separation method provided by the invention comprises the following steps: S1, pre-reduction treatment; and S3, cobalt is leached through selective oxidation, and manganese is precipitated. According to the separation method, the synergistic effect of ORP and pH is regulated and controlled, proper reducing agents and oxidizing agents are selected, cobalt is selectively leached through step-by-step oxidation, dissolution of manganese is inhibited, manganese circularly entering a leaching and extraction system is reduced, the leaching and extraction operation cost is reduced, meanwhile, a selective complexing agent is introduced, impurity co-dissolution is reduced, the subsequent purification process is simplified, and the method is suitable for industrial production. The preparation method is simple to operate and easy for industrial production, and has a good application prospect.

The invention belongs to the technical field of slag metallurgy, and relates to a coprocessing method for copper smelting slag and zinc leaching slag, which comprises the following steps: S1, mixing the copper smelting slag, the zinc leaching slag, a vulcanizing agent and a flux to obtain a mixture; introducing a mixture of pulverized coal and air, and reacting at 1150-1300 DEG C for 2-4 hours to obtain a gas phase, a slag phase and matte; s2, the gas phase is subjected to dust removal, and zinc oxide smoke dust rich in zinc, lead and silver is obtained; zinc is leached from the zinc oxide smoke dust through a wet method; and S3, the slag phase is subjected to slow cooling, ore grinding and copper flotation, copper concentrate is obtained, and gold, silver and copper elements are recycled. According to the method, heat of the high-zinc hot-state copper smelting slag is used for processing the high-copper normal-temperature zinc hydrometallurgy slag, and the slag processing energy consumption of the zinc hydrometallurgy slag is reduced. Through mixing treatment, lead and zinc in the mixed slag enter the secondary zinc oxide smoke dust to be recovered, and the recovery rate of the lead and the recovery rate of the zinc both reach 80% or above; and the total recovery rate of copper in the mixed slag is greater than 85% after copper enters matte recovery.

The invention provides a method for recovering lithium in lithium precipitation mother liquor, which belongs to the technical field of hydrometallurgy and comprises the following steps: (1) activating a titanium adsorbent: activating the titanium adsorbent by using an acid solution; (2) adsorption: adsorbing lithium in the lithium precipitation mother liquor by using an extruded titanium adsorbent; (3) material washing: washing the adsorbent after adsorption by using pure water; (4) analysis: carrying out circulating analysis on the washed adsorbent by using hydrochloric acid with corresponding concentration to obtain a lithium-rich analysis solution; and (5) refluxing the lithium-containing desorption solution to the lithium precipitation unit. The extruded adsorbent used in the invention has high adsorption capacity and good ion selectivity, and by using the method, the high lithium recovery rate can be ensured, the interference of carnallite ions on lithium recovery can be avoided, the energy consumption is low, and the reduction of the operation cost is facilitated.

The invention belongs to the field of hydrometallurgy, and particularly discloses a high-purity vanadium oxide electrode and a preparation method thereof. The method comprises the following steps: pre-treating the alkaline vanadium leaching solution by using an activated aluminum oxide adsorption column to obtain a pre-treated solution; adding a composite impurity removal agent taking modified lignosulfonate as a main agent into the pretreatment liquid for primary impurity removal to obtain primary impurity-removed filtrate; adding a calcium hydroxide suspension and a flocculating agent into the primary impurity-removed filtrate for secondary impurity removal to obtain secondary impurity-removed filtrate; purifying the secondary impurity-removed filtrate by using an ion exchange column to obtain a purified solution; ammonium salt is added into the purified liquid for vanadium precipitation, and ammonium metavanadate crystals are obtained; calcining the ammonium metavanadate crystal to obtain high-purity vanadium pentoxide; and preparing the high-purity vanadium oxide electrode by using the high-purity vanadium pentoxide. According to the scheme, the high-purity vanadium pentoxide is prepared by taking the alkaline vanadium leaching solution as a raw material through a multi-stage deep impurity removal process, and the high-purity vanadium oxide electrode is prepared by taking the alkaline vanadium leaching solution as the raw material.

The invention relates to a method for separating zirconium and hafnium through solvent extraction, and belongs to the technical field of hydrometallurgy. According to the method, zirconium and hafnium separation is achieved through a solvent extraction method, the novel extraction agent is adopted, the synergistic effect of the modified imidazole ionic liquid, the amide compound and tributyl phosphate is utilized, the process steps of solution acidification, extraction agent extraction, sulfuric acid solution washing and reverse extraction are carried out, and the zirconium solution and the hafnium solution are obtained through separation. The process method is simple, the separation effect is good, and the separation purity is high.

The invention belongs to the field of hydrometallurgy, and particularly relates to a method for extracting niobium and / or scandium in a phosphoric acid solution system, which is characterized in that the phosphoric acid solution system containing niobium and / or scandium and an extraction organic phase are subjected to auxiliary extraction under a composite field of ultrasonic-magnetic field to obtain a loaded organic phase. Innovative research shows that extraction is carried out under an ultrasonic-magnetic field composite field, the final physicochemical characteristics of niobium-scandium in a phosphoric acid solution can be adapted accidentally, excellent extraction capacity can be obtained accidentally, and especially excellent scandium-niobium separation selectivity can be obtained under a composite phosphoric acid system containing niobium and scandium.

The invention relates to a method for extracting tungsten and molybdenum from low-grade tungsten-molybdenum ore, belongs to the technical field of non-ferrous metal hydrometallurgy, and solves the problems of harsh conditions, low extraction efficiency, high cost and environmental pollution when tungsten and molybdenum are extracted from low-grade tungsten-molybdenum ore in the prior art. The method comprises the following steps: leaching the low-grade tungsten-molybdenum ore by adopting sulfuric acid, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues; extracting molybdenum from the leachate by adopting a cationic extraction agent to obtain tungsten-containing molybdenum extraction raffinate and a negative molybdenum organic phase; and extracting tungsten from the tungsten-containing molybdenum extraction raffinate by adopting a neutral extraction agent to obtain tungsten extraction raffinate and a negative tungsten organic phase. The method is carried out at normal temperature and normal pressure, the complexing characteristic of molybdenum to tungsten in the low-grade tungsten-molybdenum mixed ore under the acidic condition is ingeniously utilized, synergistic leaching of tungsten and molybdenum is achieved, the tungsten and molybdenum extraction efficiency is high, operation is easy and convenient, complexing agents such as phosphoric acid do not need to be added, and the leaching cost is greatly reduced; and the method is clean and environment-friendly, and development and utilization of low-grade tungsten-molybdenum ore are promoted.

The invention belongs to the technical field of non-ferrous metal hydrometallurgy, and discloses a method for extracting valuable metal from laterite-nickel ore pickle liquor. According to the method, nickel and cobalt can be complexed with ammonia under the ammoniacal condition, and then carbonate is added to selectively separate manganese. For a nickel-cobalt-ammonia solution, an oxidizing agent is used for oxidizing a cobalt-ammonia solution, a divalent cobalt-ammonia complex is oxidized into a trivalent cobalt-ammonia complex, then nickel is masked, and liquid caustic soda is added, so that cobalt can be separated. The remaining nickel complex is oxidized and decomposed under the strong oxidation effect of the unmasking agent to obtain free nickel, then liquid caustic soda is added to separate nickel, and the cracked masking agent is left in the filtrate and can be recycled. The method is easy to operate, easy to industrialize, low in cost and free of environmental pollution, the valuable metal elements in the laterite-nickel ore hydrochloric acid normal-pressure pickle liquor can be extracted in a pure compound product mode, solid waste residues are not generated, valuable metal element resources are fully utilized, and large economic benefits can be generated.

The invention relates to the technical field of rare earth metal hydrometallurgy, in particular to a rare earth molten salt electrolysis truss type multifunctional metal output system and a control method.The system comprises a main body supporting and moving frame, an integrated function execution module set, a bottom cleaning function module, an electrolytic bath station unit and an intelligent control system; wherein the integrated function execution module group, the bottom cleaning function module, the electrolytic tank station unit and the intelligent control system are respectively arranged in the main body support and motion frame, and the main body support and motion frame is arranged in a gantry truss structure; the four functions of pot lifting, casting, cooling and bottom cleaning in rare earth electrolysis are integrated on the integrated bearing platform of the same gantry truss type rack, and through multi-sensing information fusion and intelligent control, the system can automatically complete the whole process operation of crucible extraction, molten metal casting, cooling forming and electrolytic bath bottom cleaning; and the exposure of workers in high-temperature and high-risk environments is obviously reduced, and the production safety and efficiency are improved.

A short-flow nickel-cobalt-manganese co-extraction process for laterite nickel ore hydro metallurgy falls within the technical field of hydrometallurgy. The process includes the following steps: co-extracting an iron-aluminum removal leaching solution of the laterite nickel ore by using an organic acid extraction system to obtain an enriched nickel-cobalt-manganese solution; extracting impurities from the enriched nickel-cobalt-manganese solution by using a P204 extraction system to obtain a high-purity nickel-cobalt-manganese solution. The co-extraction process of the disclosure simplifies the current hydrometallurgical process flow for extracting nickel-cobalt-manganese from the laterite nickel ore, greatly reduces the acid, alkali, and extractant usage, energy consumption, and water consumption in the extraction process, and reduces the cost of nickel-cobalt-manganese extraction, which is of great significance for the industrial production of ternary nickel-cobalt-manganese raw materials. At the same time, the process of the disclosure can achieve the co-extraction of nickel-cobalt-manganese, with high-purity of nickel-cobalt-manganese and low loss of nickel-cobalt, and the obtained high-purity nickel-cobalt-manganese solution is adjusted according to the proportion of nickel-cobalt-manganese metal in the ternary precursor product, and is finally used for preparing a nickel-cobalt-manganese ternary cathode material.

The invention belongs to the field of hydrometallurgy, and particularly relates to a preparation method of a chromium-doped manganese lithium ion sieve and application of the chromium-doped manganese lithium ion sieve in lithium extraction. The preparation method comprises the following steps: by taking a lithium source, a manganese source and a chromium source as raw materials, synthesizing a chromium-doped spinel type lithium ion sieve precursor through a high-temperature solid-phase method, and further performing acid leaching treatment, thereby obtaining the ion sieve with high adsorption selectivity and low manganese solution loss. The method is simple in process and low in cost, and the prepared chromium-doped manganese lithium ion sieve is stable in crystal structure and low in manganese solution loss rate. The developed chromium-doped manganese lithium ion sieve is suitable for efficient extraction of lithium resources of salt lake brine, and a low-cost solution is provided for efficient extraction of the lithium resources of the salt lake.

The invention discloses a preparation and application method of active magnesium oxide for cobalt precipitation, which comprises the following steps: adding acetate during preparation of an active magnesium oxide precursor magnesium hydroxide to obtain magnesium hydroxide with a double-tooth structure; when magnesium oxide is prepared through calcination, conversion from magnesium hydroxide to magnesium oxide can be achieved at a low temperature, and meanwhile high activity is obtained; and finally, the magnesium oxide slurry is added into the cobalt precipitation pre-solution for cobalt precipitation, the cobalt precipitation effect is good, and the obtained coarse cobalt hydroxide cobalt is high in grade. The magnesium hydroxide regulating agent is used for promoting generation of magnesium oxide rich in active sites, the magnesium hydroxide regulating agent is applied to the wet metallurgy cobalt deposition process, the cobalt deposition effect of active magnesium oxide prepared through a chemical method is effectively improved, other methods except for the method for reducing the particle size and promoting the activity of magnesium oxide are developed, acetate is selected as the magnesium hydroxide regulating agent, the dosage is small, and the cost is low. Magnesium oxide obtained through calcination is high in purity, the cobalt deposition process is not affected, unit consumption of magnesium oxide can be reduced, and cost is saved.

The invention discloses an MHP short-process nickel-cobalt-manganese purification liquid preparation technology, and belongs to the technical field of hydrometallurgy. Comprising the following steps: drying a cobalt nickel hydroxide raw material; carrying out size mixing, reduction leaching and separation to obtain a primarily purified nickel-cobalt-manganese solution and manganese-containing slag; carrying out acidification leaching on the manganese-containing slag, and separating to obtain manganese-silicon slag and a nickel-containing pickling solution; adding a neutralizing agent into the primarily purified nickel-cobalt-manganese solution to adjust the pH value, adding an oxidizing agent, and separating to obtain filtrate and filter residues; concentrated sulfuric acid is added into the filter residues for curing and leaching, and cured leaching residues and desiliconized filtrate are obtained through separation; cured leaching residues are returned for reduction leaching; adding a second neutralizer into the desiliconized filtrate to adjust the pH value, reacting, and separating to obtain iron-aluminum slag and nickel-containing impurity-removed filtrate; adding a third neutralizer into the nickel-containing impurity-removed filtrate to adjust the pH and precipitate nickel, and separating to obtain a nickel-containing alkaline substance; and removing impurities in the filtrate to obtain the nickel-cobalt-manganese purified liquid. According to the method, the nickel-cobalt-manganese purified liquid, the scandium-containing iron-aluminum slag, the by-product manganese-silicon slag and the like can be obtained, solid waste reduction and high value are achieved, and the method is more economical, more efficient and more environmentally friendly.

The invention discloses a device and method for treating molybdenum concentrate hydrometallurgy wastewater, and relates to the technical field of wastewater treatment.The device comprises a top box and a rack fixedly connected to the outer surface of the top box; the airflow generating mechanism is used for generating airflow in the inner cavity of the top box, by arranging the airflow generating mechanism, gas flow can be generated in the inner cavity of the top box and the inner cavity of the bottom box when molybdenum concentrate hydrometallurgy waste water is recycled, and particle precipitates after precipitation can be discharged out of the device in a precipitation mode; meanwhile, in the air flotation mode, bubbles are poured into the inner cavity of the device, so that suspended solids in the sewage float to the top of the inner cavity through the bubbles, and then the suspended solids are discharged; and the switching mechanism is used for switching two treatment modes of sewage precipitation and air floatation, so that the effect of recycling particulate matters and suspended matters in the metallurgical wastewater is achieved.

The invention relates to a method for preparing sponge iron from laterite-nickel ore hydrometallurgy tailings, which comprises the following steps: (1) carrying out acid leaching on laterite-nickel ore hydrometallurgy tailings to obtain leached residues without at least part of CaSO4; (2) oxidizing and roasting the leaching residues obtained in the step (1), so that at least part of sulfate is discharged as sulfur-containing gas; performing hydrogen reduction to obtain a reduced material; and (3) the reduction material in the step (2) is sequentially subjected to ore grinding and magnetic separation, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained. According to the method, iron resources in the laterite-nickel ore hydrometallurgy tailings are recycled, desulfurization and reduction are carried out step by step, the desulfurization efficiency is improved, the reduction temperature is reduced, and the sponge iron with the Fe content being 90 wt% or above and the S content being 0.01 wt% or below is obtained.

A hybrid load-energy storage system applicable to a microgrid of a hydrometallurgical plant, includes: a plurality of first electrical equipment, a plurality of second electrical equipment, first energy storage equipment, and second energy storage equipment. An electric usage priority of the first electrical equipment is lower than that of the second electrical equipment. The first energy storage equipment is on-grid and off-grid energy storage equipment, and the second energy storage equipment is grid-forming energy storage equipment. The first electrical equipment is connected to the first energy storage equipment via branches provided with first circuit breakers, and the second electrical equipment is connected to the second energy storage equipment via branches provided with second circuit breakers. The first second energy storage equipment are respectively connected to an AC bus via branches provided with a third and a fourth circuit breakers, and the AC bus is connected to an external power grid.