98results about How to "Improve calcination efficiency" patented technology

The invention discloses a method for treating inert aluminum ash in an aluminum ash treatment technology. A mixture of aluminum ash and raw slurry is fired through a rotary kiln, is cooled through a cooling machine and is finally subjected to clinker leaching in a ball grinding mill in sequence. A device provided by the invention can be used for safely and efficiently treating the inert aluminum ash in the aluminum ash; lime milk is prepared and reacts with F<-> to generate CaF2, so that harmful elements and harms caused by the fact that the F<-> enter flue gas are eliminated; meanwhile, organic matters accumulated by a Bayer process can be treated. The rotary kiln is arranged and materials with different grain diameters can be uniformly mixed; the calcination efficiency and effect are improved.

The invention discloses a continuous production device for calcining and whitening black talc and a production process thereof. The continuous production device comprises a coarse particle suspension preheater, a white talc rotary kiln and a grate type cooling machine with a heat preservation kettle, which are sequentially connected; the production process comprises the following steps: A. superfine-grinding black talc; B. preheating by a preheater at the kiln tail; C. calcining in the rotary kiln; and D. preserving heat by the heat preservation kettle and cooling. The design of the coarse particle suspension preheater is adopted and the tail gas waste heat of the white talc rotary kiln is fully utilized, so that the energy consumption is reduced; the calcining efficiency is improved due to a pickaxe-shaped spiral pushing device of the rotary kiln and spirally-arranged heat-resisting bricks with ribs, and the grate type cooling machine with the heat preservation kettle can achieve excellent heat-preservation and cooling effects; and the continuous production device can achieve large-scale continuously-mechanical production for calcining white talc and adopts center-control automatic operation, so as to greatly improve the labor productivity and achieve stable quality and environment-friendly production, thereby having good economic and environment-protection benefits.

The invention belongs to the technical field of lithium ion battery material preparation, and particularly relates to a method for preparing a proportion-adjustable nickel-rich positive electrode material of a lithium ion battery. According to the scheme of the invention, a chemical formula of the positive electrode material is xLiNi1/3Co1/3Mn1/3O2.yLiNiO2.zAl2O3, wherein x is greater than or equal to 0.2 and less than or equal to 0.5, y is greater than or equal to 0.5 and less than or equal to 0.8, z is greater than or equal to 0 and less than or equal to 0.1, and the sum of x and y is equalto 1. The preparation steps are as follows: controlling the feed speed ratio according to the value of x:y, implementing multi-layered stacking on LiNi1/3Co1/3Mn1/3O2 and LiNiO2 by alternate precipitation, synthesizing a nickel-rich positive electrode material precursor with multiple composite structures, and then performing mixed calcination with an aluminum salt gel to achieve that the outer layer is coated with Al2O3, and finally adopting an ozone-oxygen mixed atmosphere calcination mode to further shorten the calcination time of the material and improve the calcination efficiency. The nickel-rich positive electrode material prepared by the method has high tap density and excellent electrochemical performance.

The invention discloses a gypsum powder preparation process and system. The system comprises a conveying device, a jaw crusher, a hammer crusher, a feeding device, a rotary kiln calcining pot and a centrifugal pulverizer which are arranged in sequence, wherein the conveying device comprises a primary conveyer belt, a secondary conveyer belt and a third conveyer belt; discharge baffle plates are correspondingly mounted on the primary conveyer belt, the second conveyer belt and the third conveyer belt; a primary collecting plate which communicates with the jaw crusher, a secondary collecting plate which communicates with the hammer crusher and a third collecting plate which communicates with the feeding device are additionally arranged on a rack; a waste heat channel is formed between the feeding device and the rotary kiln calcining pot; and the centrifugal pulverizer is connected with a storage tank. As ores are graded in a conveying process, energy consumption for continuously crushingthe ores can be reduced, and the ore crushing efficiency can be improved; and in addition, due to adoption of the waste heat channel and a novel centrifugal pulverizing component, the product qualitycan be further improved, and the energy consumption cost for production can be lowered.

The invention discloses an internal circulation type fine lime shaft kiln and a calcination method thereof. The lime shaft kiln comprises a feed bin (1), a height adjustable feed pipe (7), a shaft kiln body (2), an annular preheating chamber (3), a multi-burner combustion chamber (6), an ejector (16), a hollow cross beam (15), a built-in heat exchanger (12), a bottom wind seat (11), a cooling airblower (17), a driving air blower (18), an ash extractor (19), a metering bin (20) and a storage bin (21). The selection of the internal circulation type fine lime shaft kiln with a push rod or without the push rod is determined according to the contents of water and impurities in a limestone raw material. Aiming at the defects of the prior common lime shaft kiln that the finely grained limestonecannot be calcined or well calcined, the invention is applicable to the calcination of the limestone with small size of 5-15 mm and medium size of 15-30 mm, thereby enlarging the utilization range ofsolid wastes and saving mineral resources.

The invention belongs to the technical field of chemical industry treatment, and relates to a two-stage calcination treatment method for electrolytic manganese ammonium sulfate slag. The method comprises the following steps: 1, carrying out first-stage calcination sulfur fixation and deamination: mixing ammonium sulfate slag with manganese ore powder, feeding the mixture into a rotary kiln at 550DEG C, and carrying out a reaction to generate a semi-finished product mainly containing manganese sulfate and magnesium sulfate and a mixed gas mainly containing ammonia gas and SO2; and 2, carryingout two-stage calcination desulfurization to prepare sulfuric acid: sending the semi-finished product into a rotary kiln with a temperature of 1200 DEG C, carrying out a reaction to generate solid slag mainly comprising magnesium oxide and magnesium dioxide, and SO2 gas, and preparing the SO2 gas into sulfuric acid. According to the method, dry calcination is adopted, and a two-stage calcination mode is adopted, so that the calcination efficiency is high, the generated gas, solid and the like can be recycled, the resource utilization rate is high, and the economic benefit is good.

The invention belongs to the technical field of industrial solid waste calcining devices, and particularly relates to a desulfurized gypsum calcining device which comprises a shell, a motor, a calcining device and a temperature sensor, wherein the top of the shell is fixedly provided with an upper cover through bolts, and the bottom of the side wall of the shell is fixedly provided with a discharge port; a control valve is in threaded connection with the end of the discharging port, a feeding hopper is installed on one side of the top of the upper cover in a penetrating mode, the top of the upper cover is connected with the motor in a penetrating mode, a rotating rod is fixedly installed at the bottom of the motor through a coupler, and bearings are clamped to the upper end and the lower end of the rotating rod. A stirring assemblies are evenly and fixedly installed in the middle of the rotating rod, the calcining device is fixedly installed on the inner side wall of the shell, the calcining device comprises a heating wire and a heat conduction plate, and the heating wire is located on the inner wall of the heat conduction plate. The device achieves uniform stirring of gypsum, thecalcining quality is guaranteed, and the calcining efficiency is improved. In addition, a comprehensive effet of saving resource is achieved.

The invention provides a rotary kiln for producing petroleum coke. The rotary kiln comprises a barrel body. Multiple wheel belts are arranged outside the barrel body in a sleeving manner and fixedly connected. A limiting housing is arranged on the upper half of each wheel belt in a housing manner. Each limiting housing is internally provided with multiple rolling wheels which are sequentially arranged into a semicircle. The rolling wheels are in rolling connection with the upper halves of the wheel belts. Support pillars are fixedly connected to the outer wall of each limiting housing, whereinthe support pillars are symmetrically arranged at the two sides of the barrel body. A shock absorption spring is connected to the bottom of each support pillar. A base is connected to the bottom of each shock absorption spring. A mixing mechanism and a beating mechanism are alternately arranged inside the barrel body in the axial direction. The mixing mechanism is composed of multiple mixing components which are uniformly distributed in the circumferential direction. Each mixing component comprises a support plate and a mixing plate, wherein each support plate is fixedly connected with the inner wall of the barrel body, and each mixing plate is fixedly connected with the corresponding support plate. The beating mechanism comprises multiple chains and beating balls, wherein the chains areuniformly distributed in the circumferential direction, and the beating balls are fixedly connected with the chains. According to the rotary kiln, when the barrel body rotates, the shaking degree is low; the service life is long; calcination raw materials are not likely to adhere to the inner wall of the barrel body; the energy consumption is lowered; and the production efficiency is high.

The invention relates to an automatic sand powder production line for metallurgical casting. The production line comprises a crushing machine, a grinding machine, a batching machine, a granulator anda calcining rotary furnace which are sequentially arranged, a cage-shaped rotor in the grinding machine is connected with an electrostatic dust collector, the electrostatic dust collector is connectedwith a first fan, a magnetic separation impurity removal device is arranged at the bottom of a material distribution device at the bottom of the electrostatic dust collector, a horizontal stirrer anda first screw conveyor are arranged in the batching machine, a cyclone dust collector and a second fan are arranged between an air inlet pipe and a smoke outlet pipe of a first feeding shell of the calcining rotary furnace, and a screening device is arranged on one side of a second discharging shell of an air cooling rotary cylinder. The whole production line achieves automatic production, the number of machining and transferring devices is reduced, the device cost and occupied space are remarkably reduced, the treatment amount is increased, quality control and production of smelting and casting sand powder with different water content, different magnetic impurities, different particle sizes and different raw materials are achieved, the machining treatment efficiency and effect are improved, continuous production is facilitated, and one set of equipment can meet various smelting and casting sand powder production requirements.

The invention discloses a desulfurized gypsum calcination apparatus which comprises a hot gas source device, a gypsum conveying device, a calcination device and a tail gas absorption device, wherein the hot gas source device is connected with the inlet end of the calcination device through a first pipeline; the outlet end of the calcination device is connected with the tail gas absorption device through a second pipeline; the bottom of the calcination device is connected with a third pipeline; the inlet end of the third pipeline is connected with the gypsum conveying device; and the outlet end of the third pipeline is connected with the calcination device. By using the above manner, the desulfurized gypsum calcination apparatus has a simple structure, can ensure sufficient gypsum supply to the inside of the calcination device, ensures the continuity of the calcination process, ensures the full integrality of the calcination process and improves the calcination efficiency.

The embodiment of the invention provides a lime kiln and a lime preparation method. The lime kiln comprises a lime kiln body and one or more heat carrier heating devices arranged outside the kiln body; the heat carrier heating device comprises a fuel gas input port, an air input port and a heat carrier output port; the kiln body is connected with the heat carrier output port through a heat carrier conveying pipeline; and a high-temperature-resistant lining is laid on the inner wall of the heat carrier conveying pipeline. When the device is used for preparing lime, no combustion flame exists in the kiln, but the heat carrier heating device is used for providing hot flue gas for the lime kiln so as to heat raw materials in the kiln, so that the temperature and the pressure of heat carrier gas can be accurately controlled, the temperature and the pressure in the lime kiln are stable, and the calcining efficiency is improved.

The invention discloses a ceramic processing technology which comprises the following steps: 1, modifying bentonite: adding bentonite into a surfactant, stirring at a low speed of 50-100r/min for 10-20min, washing with water, drying, and grinding to 50-100 meshes; in ceramic processing, spodumene is used as a base material, bentonite is treated in a surface agent, then blasting treatment is carried out, wollastonite in the surface agent is inserted into the bentonite in a penetrating mode, meanwhile, the effect of wollastonite on bentonite can be improved through shell powder, and therefore in the hot-pressing calcination process, the spodumene is jointly improved through bentonite and wollastonite.