14results about "Aluminium chlorides" patented technology

This invention provides a method for preparing high-purity alumina using kaolin. The method comprises the following steps: S1: Pre-treating kaolin to obtain pre-treated kaolin; S2: Adding hydrochloric acid solution to the pre-treated kaolin for acid purification, followed by activation to obtain activated kaolin; S3: Adding hydrochloric acid solution to the activated kaolin for acid dissolution, followed by concentration and sedimentation to obtain crude aluminum chloride solution and silica filter cake; S4: Purifying the crude aluminum chloride solution to obtain a high-purity aluminum chloride solution; S5: Preparing high-purity alumina using the high-purity aluminum chloride solution. This invention can reduce the production cost of high-purity alumina, and the obtained high-purity alumina has a purity ≥99.9%, which is beneficial for expanding the industrial application of high-purity alumina.

This invention provides a method for preparing alumina and removing chloride ions from kaolin and coal gangue, relating to the fields of inorganic chemical production and solid waste resource utilization. The method uses kaolin and coal gangue as raw materials, which are crushed and ground, calcined at high temperature, leached with hydrochloric acid, separated from aluminum and silicon, concentrated and crystallized with aluminum chloride, and calcined at low temperature to obtain acid-process alumina. Residual chloride ions are then removed through a precisely temperature-controlled water leaching dechlorination process, ultimately producing alumina superior to first-grade alumina via the Bayer process. The activity and dissolution rate of the acid-process alumina are ensured by controlling the calcination temperature of the aluminum chloride crystals at 730℃~780℃. A dechlorination process using 5~7 times the amount of water and constant temperature stirring at 95℃ for 45 minutes reduces the chloride ion content from 1%~2% to approximately 0.015%. This invention achieves full resource utilization of kaolin and coal gangue solid waste, efficient separation of aluminum and silicon components, and co-production of silica from the sludge. The process is simple, energy-efficient, and produces high-quality products, making it suitable for large-scale industrial production.

i) A step of reacting sewage sludge incineration ash containing at least one iron compound and an aluminum compound with at least one alkali metal chloride and / or at least one alkaline earth metal chloride at a temperature of 200°C to 1100°C in an inert gas atmosphere, and ii) Step of extracting and isolating the iron chloride and aluminum chloride formed in the exhaust gas stream. A process for producing iron chloride and aluminum chloride, characterized by including the following:

The application discloses a kind of aluminum ash efficient utilization method, after being finely ground, preheating, microwave heating oxidation denitrification is added to fluidized bed under the assistance of large particle wave-absorbing material, aluminum, aluminum nitride in aluminum ash is converted into alumina, nitrogen, after heat exchange, fluoride, chlorides and other salts are removed by microwave vacuum distillation to denitrification residue, after screening, wave-absorbing material is recycled to microwave flow chlorination deoxidation, alumina, silicon oxide and magnesium oxide in aluminum ash are converted into aluminum chloride, silicon chloride and magnesium chloride, and magnesium chloride enters tailings, and aluminum chloride and silicon chloride are recovered by multistage condensation, respectively, unreacted chlorine and carbon monoxide are recycled by multistage separation.The application uses microwave heating, without balling, oxidation denitrification, distillation desalination and chlorination deoxidation reaction rate is fast, efficiency is high, raw material is widely used, system energy utilization rate is high, can realize large-scale clean and efficient utilization of aluminum ash, with good economic benefit and social benefit.

The application relates to the technical field of resource recycling, and particularly discloses a double-rotary-kiln method fly ash collaborative grading and carbon fixation process system, which comprises the following steps: firstly, pretreating Na2SO4 type raw materials such as mirabilite and SDS sodium-based desulfurization ash, removing crystallization water and grinding to below 200 meshes, then reducing roasting in a two-stage three-blade type self-gravity semi-suspension closed reduction rotary kiln, and simultaneously recycling high-purity S and CO2; after being proportioned according to the mass ratio of the roasting solid-phase Na2O to fly ash SiO2+Al2O3 of 0.6-0.8:1, the mixture is hot-charged into a three-blade type self-gravity semi-suspension closed rotary kiln for calcination; after the calcined material is cooled, water immersion and pressure filtration are carried out, and the water is recycled. The leaching solid phase is subjected to magnetic separation to extract metallic iron, and the tailings are used as steelmaking auxiliary materials; the leaching liquid phase is subjected to supergravity carbonization to obtain sodium carbonate, the remaining liquid phase is acidified, separated and purified, then low-temperature dehydration crystallization is carried out, hydrated SiO2 and anhydrous aluminum chloride are prepared, and an integrated process system of solid waste collaboration, resource recycling and low-carbon environmental protection is realized, which has environmental benefits and economic benefits, and promotes the technical upgrading of the solid waste resource industry.

The present application belongs to the technical field of waste liquid treatment, and particularly relates to a graphite purification waste liquid treatment method and a treatment system. The present application introduces a pre-acid pickling system to utilize waste acid twice, reduces the amount of acid used in the acid pickling process of graphite purification, improves the use efficiency of acid liquid, thereby reducing the cost of the graphite purification process and significantly enhancing the overall economy. The present application also introduces a sodium fluorosilicate production line, effectively realizing the resource utilization of residual fluorosilicic acid and fluorosilicate in waste water. Not only can the operation cost of reagents in the subsequent water treatment process be effectively reduced, but also the produced sodium fluorosilicate can be sold to improve economic benefits. An evaporation crystallization system is used to crystallize and recover valuable salts in waste water. The obtained crystalline salt can be further used as a raw material for other products. The treatment system provided by the present application can realize the resource utilization and recycling of waste acid and waste water, and achieve zero emission.

This utility model discloses a single-unit distillation aluminum trichloride recovery device. The gas outlet of the disproportionation vessel is connected to the gas inlets of two sets of cooling devices via pipelines. The gas outlets of both sets of cooling devices are connected to the gas inlet of the disproportionation tower. The cooling device includes several vertically arranged gas phase pipes, with jackets fixedly fitted on the outer walls of the gas phase pipes. The outlet of the circulating water supply main pipe is connected to the inlet of the jacket, and the outlet of the jacket is connected to the inlet of the circulating water return main pipe. The advantages of this utility model are: the connection structure is simple and easy to implement, achieving the effect of separating AlCl3 from the mixed single-unit gas. The remaining gas phase enters the disproportionation tower for further gas-solid separation. The separated AlCl3 can be directly recovered and reused as a catalyst, realizing the effective utilization of AlCl3 resources. At the same time, it reduces the failure rate of the packing in the disproportionation tower, effectively improving the service life of the disproportionation tower.

The present application relates to a kind of polycrystalline silicon slag slurry resource processing device system and method, the device system includes sequentially connected along material flow direction mixer, preheater, nitrogen heater, silicon powder impurity remover, tail gas filter, heat exchanger and tail gas spraying device;The silicon powder impurity remover is connected with ton bag;The tail gas spraying device is connected with lye storage device;The circulating nitrogen of tail gas spraying device discharge enters nitrogen storage device, and part of circulating nitrogen in the nitrogen storage device is recycled for the mixer, and part is transported into the ton bag.The device system provided by the present application greatly improves the heat exchange efficiency, while the higher purity silicon powder can be recycled and used as silicon source for front-end process, and the hydrolysis neutralization heat can also be recycled to reduce energy consumption cost.

The present invention relates to a method for producing an aluminous material, in particular, aluminium oxyhydroxychlorides and alpha alumina. The method comprising providing an aluminium-containing feedstock and separating the aluminium-containing feedstock to provide a pregnant liquor. The pregnant liquor is concentrated to obtain a saturated aluminium solution and subjected to a crystallisation process. The aluminium chloride hexahydrate crystals slurry is cooled, and the crystals separated from a spent liquor. The aluminium chloride hexahydrate crystals is heated under controlled air flow to obtain dehydrated aluminium oxyhydroxychlorides. Optionally, the aluminium chloride hexahydrate crystals may be dried under at least a partial vacuum before being heated under controlled air flow. The aluminium oxyhydroxychlorides may be subsequently decomposed and calcined to form primarily alpha alumina.

The utility model discloses a kind of aluminium chlorides recovery device in the polysilicon by-product processing process, it is related to polysilicon by-product processing technical field.The aluminium chlorides recovery device in the polysilicon by-product processing process, the utility model can efficiently recover the aluminium chlorides in polysilicon by-product by setting pretreatment unit, dissolving unit, crystallization unit and drying unit, the problems of many drawbacks of traditional physical separation method difficult to realize efficient separation and chemical precipitation method exist are solved.Dissolving unit in electric heating wire and temperature sensor can accurately control dissolving temperature, improve dissolving efficiency, filter can filter after dissolving material, guarantee the smooth progress of subsequent processing.Cooling jacket clamp in crystallization unit can accurately control crystallization temperature, stirring rod and paddle slowly rotate, can promote crystal growth uniform, improve crystallization efficiency.Heat fan and shunt pipe in drying unit can efficiently dry after crystallization product.

This utility model relates to a device for desulfurization, dechlorination, and hardening of high-salinity wastewater using calcium carbide slag, belonging to the field of industrial wastewater treatment technology. The method includes steps such as heavy metal removal, magnesium ion removal, two-stage desulfurization and dechlorination, and calcium ion removal, sequentially achieving the removal of heavy metals and magnesium ions from the wastewater. 2+ SO4 2‑ Cl ‑ and Ca 2+ The system achieves efficient removal of calcium carbide slag, and the resulting precipitate is partially recycled for desulfurization after solid-liquid separation. The device includes a neutralization tank, a magnesium precipitation tank, a first reaction tank, a second reaction tank, a calcium precipitation tank, a desulfurization tower, a blower, and multi-stage solid-liquid separation units. It features a compact structure and clear division of labor. This invention fully utilizes calcium carbide slag solid waste resources, achieving high treatment efficiency, low operating costs, and resource-based utilization of byproducts. It possesses good engineering adaptability and economic and environmental benefits.

A solid electrolyte material is represented by the following composition formula (1), LiaAlbOcXd . . . Formula (1), where values a, b, c, and d are each greater than 0, and X is at least one selected from the group consisting of CI and Br. A battery includes a positive electrode, a negative electrode and an electrolyte layer disposed between the positive electrode and the negative electrode. At least one selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte layer includes the solid electrolyte material.