59results about How to "Reduce acid consumption" patented technology

The invention discloses a waste battery lithium iron phosphate positive electrode black powder recovery method which comprises the following steps: S1, activating and roasting positive electrode black powder to obtain pretreated black powder, and mixing and ball-milling the pretreated black powder, an oxidizing agent and an activating solvent to obtain pre-oxidized black powder; s3, the pre-oxidized black powder and an inorganic solvent are mixed for a leaching reaction, and mother liquor A and iron phosphate slag are obtained; s4, adding a pH regulator into the mother liquor A to remove impurities so as to obtain mother liquor B; s5, mixing and purifying the iron phosphate slag and phosphoric acid to obtain crude iron phosphate, washing the crude iron phosphate with water, and adding a complexing agent for further purification to obtain high-purity iron phosphate; and S6, concentrating the mother liquor B to obtain concentrated mother liquor C, and introducing carbon dioxide into the concentrated mother liquor C to precipitate lithium to obtain the battery-grade lithium carbonate. According to the process, iron, lithium, phosphorus and other elements in the positive electrode black powder are efficiently separated and recycled, low-acid or acid-free green leaching of lithium is achieved, the lithium leaching rate is larger than or equal to 98.0%, and the purity of obtained iron phosphate is larger than or equal to 99.3%; the purity of lithium carbonate is greater than or equal to 99.0%.

The invention relates to the technical field of beneficiation of copper cobalt oxide ores, and discloses a flotation method for high-calcium-magnesium copper cobalt oxide ores and a combined collecting agent. The positive and negative mixed flotation technology is adopted, a combined collecting agent composed of oxidized paraffin soap, sodium oleate and divalent metal cations is adopted in the reverse flotation process, the total recovery rate of copper and cobalt reaches 90% or above, and the leaching acid consumption is 20-60 kg / t.feeding ore. The combined collecting agent adopted by the method is small in dosage, good in collecting performance and small in toxicity, compared with an existing copper oxide cobalt ore flotation technology, the method can improve the copper and cobalt recovery rate by 10% or above, leaching acid consumption is remarkably reduced, the production cost is remarkably reduced, the technological process is simple, and industrial application and popularization are easy.

The invention relates to a spraying device capable of rotationally spraying out spraying liquid, an absorption device and application of the absorption device. The spraying device can atomize spraying liquid, so that the gas-liquid mass transfer efficiency is improved, and the acid consumption is reduced. The spraying device comprises a spraying liquid inlet, a first spraying pipe in fluid communication with the spraying liquid inlet, and a plurality of second spraying pipes which are in fluid communication with the first spraying pipe, are perpendicular to the first spraying pipe and extend towards the two sides of the first spraying pipe. The third spraying pipes are in fluid communication with the second spraying pipes and extend towards the two sides of the second spraying pipes in the direction perpendicular to the second spraying pipes, and the nozzles are located at the tail ends of the third spraying pipes and are in fluid communication with the third spraying pipes. The two adjacent nozzles located on the same side of the second spraying pipe are configured to enable spraying liquid to be sprayed out in the same rotating direction.

The invention discloses a method for removing fluorine from high-fluorine tungsten ore, which comprises the following steps of: S1, carrying out ball milling on the high-fluorine tungsten ore to enable the granularity of ore pulp to be less than 325 meshes, and enabling the obtained ore pulp to enter the next procedure; on one hand, fluorine is removed from the source, the fluorine is concentrated and enriched from the source, the fluorine is removed by adding the fluorine removal agent, the fluorine element is prevented from entering the main process to pollute the production process and the product, and compared with the fluorine removal in the production wastewater, the fluorine removal difficulty and the wastewater fluorine removal treatment cost are reduced; on the other hand, excessive sodium hydroxide after the soda boiling decomposition process is concentrated, enriched and recycled, and the defluorinated sodium hydroxide mother liquor is returned to the main process for pulp mixing and soda boiling for use, so that the use amount of new alkali in the soda decomposition process is greatly reduced, the production cost is saved, and the economic benefits of enterprises are increased; the method is simple to operate, cheap in raw materials, low in energy consumption and easy to industrialize.

The invention discloses an activation method of silicon malachite minerals and a flotation method of high-alkalinity copper oxide ore or copper cobalt oxide ore, and belongs to the technical field of ore dressing. According to the method, crystalline phase transformation and site reconstruction are carried out on the surface of the silicon malachite, so that the surface of the silicon malachite is activated to enhance the flotation separation effect of the silicon malachite, and the problem that the silicon malachite is difficult to float and recover due to high surface hydrophilicity is solved. The method for activating the silicon malachite can also be used for flotation of complex high-alkalinity copper oxide (or copper-cobalt) ore, the high-alkalinity copper oxide (or copper-cobalt) ore is treated through the positive and negative combined flotation process, and the purposes that the recovery rate of copper and cobalt in the high-alkalinity copper oxide (or copper-cobalt) ore is larger than 90%, and the removal rate of calcium and magnesium is larger than 70% can be achieved. Compared with an existing copper oxide (copper-cobalt ore) flotation process, the method has the advantages of being simple in process, high in adaptability, small in toxicity, low in cost, high in economic benefit and easy to industrially popularize and apply.

The invention discloses a synthetic method of 2-chloro-4-fluoro-5-nitrobenzoic acid. The synthetic method comprises the following steps: preparing a mixed acid of nitric acid and sulfuric acid; the method comprises the following steps: mixing 2-chloro-4-fluorotrichlorotoluene and mixed acid to carry out nitration reaction, heating the reaction system without separation after the nitration reaction is finished to carry out hydrolysis reaction, and obtaining the 2-chloro-4-fluoro-5-nitrobenzoic acid by a one-pot method. The synthesis method is high in conversion rate, good in yield, low in cost, simple in process, convenient to operate, free of separation and purification of intermediate products in the midway and easy to realize industrial production.

The invention relates to the technical field of hydrometallurgy, in particular to a method for recycling scandium oxide from scandium slag, scandium oxide and application of the scandium oxide. According to the method, the scandium residues obtained from MHP are subjected to acid leaching, then pass through an N1923 extraction section, then pass through a P350 extraction section and then pass through an N235 extraction section, and finally a scandium chloride solution is subjected to scandium precipitation treatment and roasting, so that high-purity scandium oxide is obtained. The method has the advantages that an alkali reverse flow required by a scandium-containing loaded organic phase is avoided, the whole extraction section can be performed in an extraction tank without filtering operation, the automation degree is high, the continuity is good, the flow is short, and the acid consumption is greatly reduced, meanwhile, the amine extraction agent N1923 is firstly used and has strong selectivity on scandium, and when the amine extraction agent N1923 is used for separating most impurities in the first extraction section, the scandium content is greatly reduced; the temperature required by extraction and reverse extraction is lower than the temperature required by an acidic phosphine extraction agent, so that aging and deterioration of an organic phase are avoided, the stage number of the reverse extraction stage is greatly reduced, and the production cost is remarkably reduced.

The present invention discloses a method for extracting titanium and removing impurities from low-quality titanium-containing waste, and belongs to the technical field of solid waste resource treatment. The method is to sequentially subject low-quality titanium-containing waste to magnetic separation for iron removal, grinding I, and cascade electrostatic enrichment to obtain a pre-enriched material; the pre-enriched material is placed at a temperature of 800-1000°C for oxidative roasting to obtain a roasted slag containing rutile titanium dioxide; the roasted slag is subjected to grinding II and pickling for impurity removal to obtain a high-grade titanium-rich material product. The method directly obtains a high-grade titanium-rich material product by upgrading and removing impurities from low-quality titanium-containing waste, thereby realizing the high-value utilization of low-quality titanium-containing waste, and the technical route is simple to operate, low in cost, and has high economic value.

The utility model discloses a simple device for preventing water from falling off from a chain type machine, which comprises a roller conveyor, a groove box is arranged below rollers of the roller conveyor, a water falling groove is arranged between two adjacent rollers on the roller conveyor, and the port of the water falling groove is lower than the top edge of the rollers on the roller conveyor; the roller conveyor is simple in structure, reasonable in design and novel and unique in idea, water drops falling from a battery piece can be collected by adding the water falling groove in the roller conveyor, the situation that the conductivity of an acid solution is reduced due to the fact that the water drops fall into the acid solution in the groove box is prevented, the etching effect is guaranteed, and meanwhile acid consumption is reduced.

The utility model discloses green high-quality chitin treatment equipment, which relates to the technical field of biological catalytic processing, and comprises a bottom plate and a ball mill, the ball mill is arranged above the bottom plate, a plurality of sieve pores are arranged on the outer wall of the ball mill, and the sieve pores are communicated with the bottom plate. A first vertical plate and a second vertical plate are fixedly arranged on the upper surface of the bottom plate and located on the two sides of the ball mill correspondingly, one end of the ball mill is rotationally connected with the second vertical plate, a feeding shell is fixedly arranged at the position, corresponding to the ball mill, of the inner side of the first vertical plate, and the end, close to the feeding shell, of the ball mill is open. One end of the ball mill is rotationally connected with the feeding shell, a feeding hopper is arranged on the upper side of the feeding shell in a communicating mode, an acid leaching pool is arranged on the upper surface of the bottom plate and located below the ball mill, and a rotating rod is rotationally arranged between the first vertical plate and the second vertical plate and located below the ball mill. The device disclosed by the utility model has the characteristics of small environmental pollution, uniform and stable product and high enzyme instantaneity.

The utility model provides an acid steaming cleaning device, and relates to the technical field of containers. The bottom of the cylinder body is arranged at the top of the heating chassis; the separation disc is arranged in the cylinder body, a first cavity used for containing a container to be cleaned is formed between the separation disc and the top of the cylinder body, a second cavity used for containing an acid solution is formed between the separation disc and the bottom of the cylinder body, and a plurality of through holes are distributed in the separation disc; the support frame group is arranged at the top of the separation disc and is used for supporting a to-be-cleaned container; the cover body is arranged at the top opening position of the cylinder body; according to the acid steaming cleaning device, acid steam is used for cleaning, the container can be prevented from being secondarily polluted by heavy metal flowing into an acid solution, the acid consumption is reduced, the acid solution on the container can drop back into the second cavity when cleaning is finished, and when the container is taken out, the container can be prevented from carrying the acid solution, and large loss of the acid solution is avoided.

The invention discloses a method for preparing a tungsten compound from artificial tungsten ore, which comprises the following steps: reacting sulfuric acid with the artificial tungsten ore to leach tungsten, and controlling the reaction conditions that the pH is 0.2-4.0, the temperature is 25-100 DEG C, the reaction time is 30 minutes to 6 hours, and the liquid-solid ratio is 1: 1-10: 1. And obtaining a metatungstate leaching solution after the reaction is completed, so that efficient leaching of tungsten is realized. And further performing purification and impurity removal on the solution to obtain a pure metatungstate solution. The pure metatungstate solution can be used for preparing different pure tungsten compound products such as solid metatungstate, phosphotungstic acid, ammonium phosphotungstate, tungsten oxide, ammonium metatungstate, ammonium paratungstate and tungstic acid. According to the technology, efficient leaching of tungsten under the mild condition can be achieved, high acid and high alkali are not needed in the whole process, and energy consumption and emission are greatly reduced; the obtained leachate is easy to purify to obtain a pure metatungstic acid solution, and the pure metatungstic acid solution can be directly used as a platform intermediate to flexibly prepare various tungsten chemicals.

The invention relates to the technical field of comprehensive utilization of metallurgical solid wastes, in particular to a comprehensive treatment method of vanadium-containing steel slag, which comprises the following steps: adding the ground vanadium-containing steel slag into an acid leaching solution for leaching reaction, and carrying out solid-liquid separation on the reacted mixture to obtain tailings rich in metal elements and a solution rich in calcium ions; cO2 gas is introduced into the solution rich in calcium ions for a mineralization reaction, and calcium carbonate precipitates are obtained; a tempering agent and a reducing agent are added into the tailings rich in metal elements, pelletizing, drying and smelting are conducted in sequence, and vanadium-containing pig iron is obtained; wherein the step S2 and the step S3 are not limited in sequence. The comprehensive treatment method for the vanadium-containing steel slag shows remarkable beneficial technical effects in the aspects of improving the recovery rate of metal elements, reducing the treatment cost and realizing maximum utilization of resources, so that environmental pollution is reduced, and sustainable utilization of the resources and sustainable development of economy are promoted.

The invention relates to the technical field of dangerous solid waste treatment and resource utilization, in particular to an aluminum electrolysis overhaul slag fluoride enhanced leaching and resource recycling method. Comprising the following steps: adding pretreated overhaul slag into a complexing reaction solution of boric acid containing a dispersing agent and gluconate, and pulping; sealing the system, heating, and implementing pulse type micro-negative pressure degassing operation in which vacuumizing and normal pressure recovery are alternated during constant-temperature leaching; after the reaction is finished, carrying out thermal-state solid-liquid separation and tailing washing, and merging to obtain clear filtrate; crystal seeds are added into the filtrate, an aluminum source solution is dropwise added, the pH value is increased, solid-liquid separation is performed after constant-temperature curing, and synthetic cryolite is obtained; and supplementing the pH buffer agent to the clear liquid and then circularly returning to the liquid preparation process. According to the method, fluorine and aluminum are cooperatively extracted under the weak acid condition, generation of silicic acid gel is inhibited, equipment corrosion is reduced, mass transfer in pores is enhanced in combination with micro-negative pressure operation, and low-energy-consumption recovery of fluoride salt and closed-loop circulation of a working solution are achieved through pH regulation and control.

The invention belongs to the field of mineral resource application, and particularly relates to an air pressure auxiliary alkaline leaching method for monazite ore alkaline decomposition slag, which comprises the following steps: obtaining the monazite ore alkaline decomposition slag containing U, Th and rare earth; the method comprises the following steps: dispersing monazite ore alkaline decomposition slag in a leaching agent solution containing a component A and a component B, and carrying out air pressure assisted leaching at 70-90 DEG C under the pressure of 0.6-1.5 Mpa; then carrying out solid-liquid separation to obtain a leaching solution enriched with U and Th and leaching residues enriched with rare earth; the component A is at least one of sodium carbonate, potassium carbonate and ammonium carbonate; the component B is at least one of sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate. According to the method, a combined leaching agent of the component A and the component B is adopted for carrying out combined alkaline leaching treatment on the monazite alkaline decomposition slag, control over the temperature and the air pressure in the leaching stage is further matched, in this way, synergistic and adaptive physical and chemical characteristics of the monazite alkaline decomposition slag can be achieved, U and Th in the monazite alkaline decomposition slag can be effectively and synchronously leached out, and in addition, selective leaching of U / Th and rare earth can be achieved.

The disc filtering and washing device comprises a material pool, a rotating disc, an auxiliary dewatering device and a discharging device, the rotating disc comprises a rack, a rotating shaft rotationally assembled on the rack, a motor driving the rotating shaft to rotate and a plurality of filter plate sets fixed to the rotating shaft and arranged in the axial direction of the rotating shaft; the opposite sides of the filter plates of the adjacent filter plate groups are uniformly provided with air holes to form adsorption sides, the turntable is sequentially provided with a material adsorption area, a first atomization washing area, a second atomization washing area, an extrusion dehydration area and a discharging area along the rotating direction of the rotating shaft, and the turntable is arranged right above the material pool, so that the material adsorption area is arranged in the material pool; the rotary disc is provided with atomization spraying devices in the first atomization washing area and the second atomization washing area, the rotary disc is provided with an auxiliary dewatering device in the extrusion dewatering area, and the rotary disc is provided with a discharging device in the discharging area. The washing device is good in washing effect and high in washing efficiency, and saves labor and cost.

A method for preparing nickel powder through electrolysis of nickel sulfate waste liquid in one step comprises the steps that the nickel sulfate waste liquid is diluted to a certain concentration by controlling the reduction degree of Ni < 2 + > under different cathode conditions, and different nickel electrolysis products are selectively prepared in the diluent; ti plated TaO2 / I rO2 alloy is used as an anode, a Ti sheet is used as a cathode, electrolysis is carried out under the conditions that the current density is 30-2000A / m < 2 >, the electrolyte temperature is 20-60 DEG C and the nickel ion concentration is 0.025-1.0 mo l / L, and nickel powder is obtained through electrodeposition on the cathode after electrolysis is finished; a circulating pump is used for recycling waste liquid; the electrolytic nickel powder prepared through the method is simple in required equipment, short in technological process, mild in condition, low in production cost, high in efficiency, environmentally friendly, suitable for one-step preparation of the nickel powder through the high-impurity nickel sulfate waste liquid and suitable for one-step preparation of the electrolytic nickel powder through the pure nickel sulfate solution. The method is especially suitable for environmental protection enterprises of nickel-containing waste liquid.

The application provides a kind of hard rock type uranium ore bioheap leaching method, comprising: constructing the bioheap leaching device comprising leaching column, acidification liquid storage tank, biological bacteria liquid storage tank, acidification liquid circulating pump, leaching liquid circulating pump;In the acidification liquid storage tank, configure acidification liquid, pump into the leaching column containing uranium ore by circulating pump, set the acidification liquid rising velocity in leaching column and acidification reaction time, carry out closed circuit leaching on uranium ore;In the biological bacteria liquid storage tank, configure leaching bacteria liquid based on the adsorption tail liquid of Jin Yuan Uranium Industry Hydrometallurgy Plant, pump into the leaching column that has completed acidification pretreatment by circulating pump, set the leaching liquid rising velocity and leaching time, carry out closed circuit leaching on the uranium ore after acidification.The application significantly reduces acid consumption and cost through the synergistic optimization of two-stage parameters, shortens the leaching period, and provides a reliable technical solution for the development of low-grade hard rock uranium ore.

The utility model relates to a pickling bath based on free roller sealing, which comprises a bath body, at least one end of the bath body is a liquid separation end, the liquid separation end is provided with an overflow dam and a free roller, the overflow dam extends upwards from the bath bottom, the free roller is arranged above a strip running channel in a floating mode, and the free roller is arranged above the strip running channel. The top end of the overflow dam and the bottom end of the free roller are close to the strip running channel, and the distance between the overflow dam and the free roller allows the strip to pass through. According to the pickling tank provided by the utility model, the liquid separation end consisting of the overflow dam and the free roller is arranged, so that a liquid level with a certain height is always kept above the strip running channel, the strip can be fully soaked in the acid liquid no matter how the draping degree of the strip is, and the pickling effect of the strip is ensured. Due to the fact that the free roller is arranged in a floating mode and can float up and down along with shaking of the strip, sealing reliability and the service life of the free roller can be guaranteed, and damage to the strip is avoided.

The invention discloses a recycling method of wastewater containing benzene series pollutants, and belongs to the technical field of wastewater recycling treatment. The recycling method comprises the following steps: firstly, carrying out Fenton reaction on wastewater containing benzene series pollutants, a ferrous catalyst and an oxidizing agent to obtain a catalytic oxidation solution, adjusting the pH value of the catalytic oxidation solution to 6.5-7.0, adding a coagulant and a coagulant aid, and carrying out coagulating sedimentation treatment to obtain pretreated effluent; the pretreated effluent enters a biochemical unit for biochemical treatment, and biochemical effluent is obtained; the biochemical effluent is treated by a multi-medium filter, enters the ultrafiltration system for ultrafiltration after meeting the water inlet requirement of the ultrafiltration system, then is filtered by a security filter and enters a reverse osmosis device, the effluent and concentrated water are separated, the obtained water is used as a water resource, and the obtained concentrated water is returned to the homogenizing tank. The method is low in energy consumption, high in efficiency and clear in unit division of labor, has the advantages of simple process, low operation cost, low sludge yield, wide application range and the like, and can remarkably improve the biodegradability of the wastewater and reduce the toxicity of the wastewater.

The application provides a method for strengthening leaching of monazite optimal-soluble residue and relates to the technical field of hydrometallurgy. The method uses two-stage leaching to strengthen leaching: in a first-stage pre-leaching procedure, the optimal-soluble residue is pre-leached by using residual acid of leaching solution generated in a second-stage strengthening leaching, so as to increase the valuable metal content of the leaching solution and reduce the residual acid concentration, thereby reducing the dissolution rate of other impurity elements and improving the filtration performance of the ore slurry; the utilization rate of the residual acid is improved, and the overall acid consumption is reduced; the first-stage pre-leaching does not need heating, and the reaction heat is used to naturally heat the ore slurry, so that the energy consumption is effectively reduced; the reaction condition is relatively mild, and the requirement for the equipment and the operating environment is low; aging or standing is not needed, the operation is continuous, and the process is smooth; in the second-stage strengthening leaching procedure, the first-stage pre-leaching residue is strengthened and leached by using high acid, so that the valuable metal leaching rate is effectively improved; after part of the elements are recovered from the optimal-soluble residue by pre-leaching, the dissolved matter is relatively reduced under the condition of high acid, the ore slurry concentration and viscosity are reduced, and the solid-liquid separation effect is good.

The invention discloses a leaching method of a waste ternary lithium battery positive electrode material, and relates to the field of hydrometallurgy, the leaching method comprises the following steps: taking the positive electrode material, carrying out first pulpifying, then carrying out acid leaching, and carrying out solid-liquid separation to obtain primary leaching residues and a lithium-containing ternary leaching solution; the primary leaching residues are subjected to secondary pulpifying and then mixed with alkali liquor to neutralize residual acid on the surfaces of the primary leaching residues, and secondary leaching residues and neutralized liquid are obtained through solid-liquid separation; and carrying out reduction roasting on the secondary leaching residues, mixing the secondary leaching residues with the neutralized liquid, carrying out third-time slurrying to obtain a slurrying material, carrying out reduction acid leaching on the slurrying material to obtain a leaching solution, repeating the steps on a subsequent batch of positive electrode materials, and recycling the subsequent batch of lithium-containing ternary leaching solution. According to the application, through a combined process of wet leaching, pyrogenic reduction and wet leaching, the volume of a required hearth furnace and the dosage of a reducing agent are reduced under the condition that the occupied space of wet leaching is not increased.

The invention discloses a graphene waste rare and precious metal dissolving reaction kettle device and a dissolving method. The graphene waste rare and precious metal dissolving reaction kettle device comprises a dissolving cavity, a feeding unit, a heating device, an ultrasonic generation device, a pH online monitoring sensor, a temperature online monitoring sensor, a flue gas online monitoring sensor, a discharging unit and a control unit. The inner wall of the dissolving cavity is coated with a graphene-containing anti-corrosion coating, the feeding port is provided with a feeding weight sensor and an adjusting valve, the first liquid inlet is provided with a first liquid inlet flow adjusting valve and a liquid inlet weight sensor, and the second liquid inlet is provided with a second liquid inlet flow adjusting valve and a flow sensor. The heating device and the ultrasonic generating device are suspended in a cavity or fixed on the top cover of the dissolving cavity according to requirements; the bottom double receiving disc guide rails are switched, and an air outlet is provided with a check valve; the control unit is connected with all the sensors and the execution piece, and feeding, temperature control, ultrasonic treatment, liquid drainage, cleaning and end point judgment are automatically completed. According to the invention, efficient dissolution of waste precious and rare metals is realized, automatic operation is realized, and labor intensity and cost are reduced.

The method comprises the following steps: pouring zinc-containing smoke dust on a titanium rod to obtain a rotational flow refining anode column, putting the rotational flow refining anode column into rotational flow refining equipment, adding electrolyte, and starting a rotational flow refining circulating pump to control the turbulent flow velocity to carry out rotational flow refining reaction; and sequentially adjusting the voltage of the cathode, respectively carrying out cyclone refining reaction, and recovering elementary substances and / or oxides of lead, indium and zinc on the cathode. According to the method, under the synergistic effect of the electric field and the turbulent flow field, efficient, stepped and short-process recovery of zinc, indium and lead in the zinc-containing smoke dust is achieved, the technological process is simple, the residual rate of valuable metal in the smoke dust is low, the product purity is high, and good application prospects are achieved.

The invention discloses an acid adding system for in-situ leaching mining and an acid adding control method. Relates to the technical field of uranium ore hydrometallurgy and intelligent mining, and comprises a regulation and control platform used for obtaining the real-time liquid injection amount and liquid injection pressure of each liquid injection well, and the real-time liquid extraction amount and uranium concentration of a liquid extraction well related to each liquid injection well, and calculating the uranium concentration according to the real-time liquid injection amount, the liquid injection pressure, the real-time liquid extraction amount and the uranium concentration; calculating the acid adding concentration and the acid demand quantity of each liquid injection well; based on the acid adding concentration and the acid demand quantity of each liquid injection well, generating an acid adding instruction of each liquid injection well; and the acid adding execution units are distributed at the mouths of the liquid injection wells and are used for receiving the acid adding instruction sent by the regulation and control platform and executing acid adding operation on the liquid injection wells according to the acid adding concentration and the acid demand quantity carried in the acid adding instruction. The acid adding strategy of each liquid injection well can be adaptively adjusted, so that the acid consumption is reduced, and the resource recovery rate is improved.

The invention discloses a method for preparing precoated sand by using cast steel waste sand, and belongs to the technical field of casting, and the method comprises the following steps: preparing regenerated sand by using the cast steel waste sand, heating the regenerated sand, sequentially adding alumina sol, phenolic resin, urotropine and calcium stearate into the heated regenerated sand in a stirring environment, and mixing to obtain the precoated sand. The method has the beneficial effects that the steel casting waste sand is used for preparing the reclaimed sand, so that the steel casting waste sand is recycled, the production cost is saved, and meanwhile green production is achieved; and the prepared reclaimed sand has the excellent properties of lower expansion coefficient, lower acid consumption value and the like, and can be matched with other components of the precoated sand to generate a better effect during production of the precoated sand.

The invention discloses a water-containing organic phase coalescence separation system and method in a rare earth extraction process. The system comprises a pre-filtering unit and a coalescence separation unit, the pre-filtering unit comprises a pre-filter, and the coalescence separation unit comprises a horizontal coalescence separator; the pre-filter is used for pre-filtering the water-containing blank organic phase to remove solid particles so as to obtain a pre-filtered water-containing blank organic phase; wherein the water-containing blank organic phase is obtained through hydrochloric acid reverse extraction and pure water washing in the rare earth extraction process; the horizontal coalescence separator comprises a horizontal coalescence separator body and a coalescence filter element; the outer layer of the coalescence filter element is a fluorinated ethylene propylene fiber layer, and the inner layer of the coalescence filter element is a polytetrafluoroethylene fiber layer; and the theoretical use flow of the single coalescence filter element is less than or equal to 1.5 m < 3 > / h. The system can remove trace water in a water-containing blank organic phase generated in the rare earth extraction process, and the water removal efficiency is greater than 80%.

The invention discloses a silicon surface cleaning agent as well as a preparation method and application thereof. The silicon surface cleaning agent is prepared from the following raw materials in percentage by mass: 3 to 10 percent of composite acid, 0.1 to 0.5 percent of chelating agent, 2 to 3 percent of ethanol, 0.1 to 1 percent of DMSO (Dimethylsulfoxide), 1 to 3 percent of surfactant, 0.1 to 0.3 percent of metal cleaning aid and the balance of deionized water. The composite acid is composed of inorganic acid and organic acid according to the mass ratio of (2-5): (1-5). According to the invention, efficient and specific removal of potassium and sodium ions is realized, and the defect of the traditional cleaning process in the aspect is overcome; meanwhile, the cleaning agent also has an excellent cleaning effect on organic oil stains and other multiple metal ions, the process is simple and friendly, and the cost is low.

The application discloses a method and device for catalytic leaching of argillaceous uranium ore based on ozone, and relates to the technical field of uranium leaching and reaction equipment. The application utilizes biomass raw materials and iron-based material powder to prepare a magnetic composite material with catalysis-adsorption dual functions through in-situ reduction by high-temperature heat treatment. The slurry of argillaceous uranium ore and the magnetic composite material are mixed in a reactor for reaction. Ozone is introduced through an aeration disc to avoid bubble aggregation, significantly increase the gas-liquid contact area, and improve the ozone utilization rate. A spiral guide plate is arranged in the reactor to effectively prolong the gas-liquid contact time and improve the ozone mass transfer efficiency. A magnetic recovery device is used to recover the magnetic material to ensure the catalyst activity, reduce the catalyst loss rate, and realize efficient catalysis. Through optimization of the reactor structure, the catalyst preparation process and the process flow, the ozone utilization rate and the leaching efficiency of the argillaceous uranium ore are significantly improved, and the catalyst recycling and the recycling of residual gas are realized.

The present application provides a method for separating nickel from lithium, comprising: (1) performing a saponification reaction on an extraction reagent and an alkaline compound to obtain a saponified extraction agent, wherein the extraction reagent comprises a specific carboxylic acid compound; (2) performing extraction and layering on a nickel-lithium feed liquid by using the saponified extraction agent obtained at step (1), so as to obtain a loaded organic phase and a raffinate water phase; and (3) using a back extraction agent to perform back extraction on the loaded organic phase obtained at step (2), so as to obtain a metal ion enrichment solution and a regenerated organic phase.