20results about How to "Reduce acid consumption" patented technology

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 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.

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 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 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 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 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 invention discloses a system and a method for recycling valuable metals of a lithium ion battery through cooperation of wet grinding and vacuum pyrolysis. The recycling method comprises the following steps: completely discharging a waste lithium ion battery, disassembling and separating a positive plate and a negative plate, crushing and sieving, and collecting undersize powder; mixing with a grinding medium, and carrying out ball milling by adopting a ball milling tank; the slurry is sieved after being dried, and screen underflow is collected and is electrode black powder; putting the electrode black powder into a vacuum pyrolysis reactor, vacuumizing and then pyrolyzing; and after the pyrolysis is finished, cooling to room temperature under vacuum or inert gas protection to obtain a valuable metal solid product. The method is carried out at a relatively low temperature, metal oxidation can be inhibited, generation of harmful gas is reduced, separation and pyrolysis with higher adaptability to raw materials are realized, and directional recovery is realized.

The invention belongs to the technical field of uranium ore mining and smelting, and particularly relates to a clay mineral protection type uranium ore in-situ acidification leaching regulation and control system and method. The system disclosed by the invention directly aims at the most fatal clay damage problem in the in-situ acidification, the clay is stabilized in advance through a chemical means, and the permeability is prevented from being reduced from the source. And the leaching efficiency is improved, the permeability of an ore bed is protected, the effective sweep range of the leaching liquid is ensured, and acid can be in full contact with and dissolve uranium ore, so that the final recovery rate of uranium is remarkably improved. And although the cost of the protective agent is increased, the operation cost of frequent acid pickling, pressurized liquid injection and the like caused by blockage is greatly reduced, the overall acid consumption and the equipment loss are reduced, and the comprehensive economic benefit is remarkable. And the production safety is guaranteed, the wellbore and safety risks caused by abnormal rising of the liquid injection pressure are avoided, the service life of a mining area is prolonged, and reliable technical support is provided for application of in-situ leaching uranium mining in complex mineralogy ore deposits.

The application belongs to the technical field of lithium ion battery recycling and regeneration, and discloses a method for repairing NCM92 positive electrode material recycling by dielectric material, wherein waste positive electrode material is pretreated to obtain NCM92 positive electrode powder; barium titanate or strontium titanate dielectric material is ground and sieved; the NCM92 positive electrode powder is divided into multiple portions, the dielectric material is mixed with the positive electrode powder in a gradient increasing adding amount, and then dried; lithium source is added to each intermediate product and uniformly mixed; finally, high-temperature sintering, crushing and sieving are performed to obtain regenerated NCM92 positive electrode material. The core of the application is that by gradient adding of the dielectric material barium titanate or strontium titanate, the bulk structure repair of the positive electrode material, the elimination of the surface residual potential and the construction of the functional coating layer are simultaneously realized in the high-temperature sintering process, so that the first efficiency, the cycle stability and the rate performance of the regenerated material are significantly improved. The method has simple process, good regeneration effect and low cost, and provides a new way for realizing high-value direct regeneration of the NCM92 positive electrode material of the retired lithium ion battery.

The application discloses a method for preparing vanadium pentoxide by using vanadium-titanium magnetite converter slag, and belongs to the field of mineral metallurgy secondary resource recovery and hydrometallurgy technology. The application sequentially removes iron through crushing, screening and magnetic separation, removes silicon through reverse flotation, and pretreats and enriches a vanadium phase, and specifically breaks the wrapping of iron / silicon impurities on the vanadium phase; then, the vanadium phase is subjected to high-temperature and high-pressure oxygen enrichment combined with sulfuric acid-hydrofluoric acid-hydrochloric acid-nitric acid four-element synergistic leaching to directionally destroy spinel lattices and oxidize vanadium to pentavalence, so that the impurities are directionally regulated while the vanadium leaching is strengthened; subsequently, the vanadium is precipitated through an acidic ammonium salt, and high-purity V2O5 is prepared through two-stage calcination. Industrial-grade pilot test results show that the total vanadium recovery rate of the whole process is greater than or equal to 93%, the purity of the final product V2O5 is greater than or equal to 99.3%, the acid consumption is reduced by more than 15% compared with a traditional process, there is no chlorine / sulfur-containing waste gas emission, and the application meets the requirements of national green metallurgy and resource comprehensive utilization industrial policies.

This utility model relates to the field of metal recycling technology, specifically a low-acid-consumption multi-stage countercurrent leaching tank for recovering zinc-rich paint sludge. It includes multiple tanks, each with a lid and a stirring motor mounted on top of the lid. A conical hopper is located at the bottom of each tank. The tank at the front conveys material to the next adjacent tank via a conveying mechanism. In the next tank, a separation mechanism separates the solid and liquid components, returning the liquid to the previous adjacent tank. This low-acid-consumption multi-stage countercurrent leaching tank for recovering zinc-rich paint sludge uses a conveying mechanism to transport incompletely dissolved paint sludge from the front tank to the next, achieving multi-stage treatment of the paint sludge. Simultaneously, the separation mechanism returns the liquid from the next tank to the previous tank, allowing the acid to circulate counter-currently in the multi-stage tanks. This ensures that the incompletely dissolved paint sludge encounters a new reaction environment in subsequent tanks, increasing the chances of dissolution and promoting more complete dissolution.

The present application belongs to the field of mineral resource processing, and particularly relates to a pretreatment and valuable element extraction method for seafloor polymetallic nodules, which comprises the following steps: rapidly heating and heat-insulating pretreatment of a mixture containing seafloor polymetallic nodules, carbon material and additives by means of electric resistance heating, to obtain pretreated material; wherein the heating rate of rapid heating is 100-500 DEG C / s; the pretreatment temperature is 800-1000 DEG C; and the additives contain at least one of alkali metal salt, alkaline earth metal salt or ammonium salt. The seafloor polymetallic nodules, carbon material and additives are innovatively instantaneously heated and pretreated, which can optimize the physicochemical structure of seafloor polymetallic nodules, and further optimize the subsequent leaching behavior, and improve the extraction rate of valuable elements.

The utility model relates to a system for preparing electrodeposited nickel by using coarse nickel cobalt hydroxide, which comprises an ore grinding unit, a first tank, a leaching unit, a solid-liquid separation unit, a purification unit, a first filter press, an extraction unit, a heat exchanger, a nickel electrodeposition tank, a lower tank and an evaporation and concentration unit which are communicated in sequence, and a concentrated solution outlet of the evaporation and concentration unit is communicated with the first tank and the leaching unit. According to the system disclosed by the utility model, the anolyte can be effectively utilized under the condition of not carrying out acid-base neutralization on the anolyte, the solution balance of the system is ensured, continuous and stable industrial production can be realized, the process is simplified, the acid consumption is reduced, and the production efficiency and quality are improved.

The application discloses a precision detection method for volatile heavy metal elements in metallurgical residual activated sludge, and belongs to the technical field of environmental monitoring and chemical analysis. The application optimizes a "HNO3-H2O2-HF" composite acid system combined with gradient temperature microwave digestion, can effectively destroy the complex mineral lattice of metallurgical sludge, release the wrapped heavy metals, ensure that the extraction rate is greater than 95%, and the result is closer to the true value. The addition of L-cysteine complex significantly improves the element stability, improves the atomization stability in ICP-MS, and reduces the memory effect. The microwave digestion is selected, the sample is subjected to in a closed system, the acid consumption is small, the waste gas emission is small, the use and exposure risk of HF are reduced. Subsequent low-temperature driving of hydrofluoric acid effectively reduces the volatilization of trace elements, and L-cysteine is used to protect the volatile elements, and the stability in the subsequent transfer, storage and detection process.

The invention provides a method for efficiently extracting aluminum oxide from low-grade aluminum ore, and belongs to the technical field of metallurgical engineering. The method provided by the invention comprises the following steps: crushing and grinding the low-grade aluminum ore in sequence to obtain pretreated aluminum ore; the pretreated aluminum ore is mixed with water, first alkali and a collecting agent, reverse flotation is conducted, and aluminum concentrate is obtained; the aluminum concentrate is subjected to pressurized acid leaching, and a leaching solution is obtained; mixing the leachate with alkali, and carrying out first iron precipitation and second aluminum precipitation step by step to obtain aluminum hydroxide; mixing aluminum hydroxide with a second acid solution to obtain an aluminum salt solution; concentrating the aluminum salt solution, adding a seed crystal, and crystallizing to obtain aluminum salt; and calcining the aluminum salt to obtain the aluminum oxide. According to the method, the aluminum-silicon ratio of the aluminum concentrate is increased through reverse flotation pre-enrichment, the acid consumption in the subsequent pressurized acid leaching process is reduced, and the aluminum oxide recovery cost is reduced; through fractional precipitation, efficient separation of aluminum and iron is achieved, and the purity of final aluminum oxide is improved.