46results about How to "Increase the average particle size" patented technology

The invention relates to a crystallization method with a fine crystal elimination, which mainly solves the problems of small crystal granularity and frequent crystallizer cleaning in the prior art. The invention is characterized in that crystallized clear mother liquor in a kettle-type crystallizer flows out from the upper part of the crystallizer, the crystallized clear mother liquor is divided into two streams, a first stream I of the crystallized clear mother liquor which takes account for 5-95% of weight is discharged, a second stream II of the crystallized clear mother liquor which takes account for 5-95% of weight enters in an intermediate groove; crystal slurry in the kettle-type crystallizer flows out from the lower part of the crystallizer and separated by a solid-liquid separator to obtain crystals, and crystallized and filtered mother liquor; crystals as products are discharged, the crystallized and filtered mother liquor is divided into two streams, a first stream I of the crystallized and filtered mother liquor which takes account for 5-95% of weight is discharged, a second stream II of the crystallized and filtered mother liquor which takes account for 5-95% of weight enters in the intermediate groove or directly returns to the kettle-type crystallizer; the raw material enters into the intermediate groove, the material in the intermediate groove is performed heat exchange through a tubular type crystallizer and returned to the kettle-type crystallizer; wherein the weight ratio of the crystallized clear mother liquor to the crystallized and filtered mother liquor is 0.1:1-10:1. The technical scheme better solves the problems, and can be used in industrial crystallization production.

The invention relates to a coking coal blending method for increasing the average particle size of coke and improving the particle size distribution of coke. Coal quality indicators are measured for each coking single coal used in production. The various coal types determined by quantitative indicators such as microscopically inert component content, maximum capacity for inertness, capacity for inertness, initial softening temperature, and solidification temperature are formulated into blended coal according to the mass ratio, so that the blended coal meets the content of microscopically inert components in coal. 17% ≤ X0 ≤ 30%, the maximum capacity index L satisfies 35 ≤ L ≤ 50, the total expansion degree is 100-350, and the coal blending plan is defined as coking if the test coking verification result index reaches the coking production coke index requirement range Coal blending scheme for production. The invention increases the average particle size of the coke, optimizes the distribution of the particle size of the coke, and improves the gas permeability of the coke in the charge of the blast furnace.

The invention provides a method for purifying crude 2,6-naphthalic acid. The method comprises the following steps: mixing crude 2,6-naphthalic acid with water to form crude 2,6-naphthalic acid slurryand carrying out heating to a supercritical state with a temperature of 375 to 450 DEG C and a pressure of 22 to 60 MPa for dissolving; subjecting 2,6-naphthalic acid dissolved in the supercritical state to cooling and crystallization; and subjecting the 2,6-naphthalic acid slurry having undergone cooling and crystallization to solid-liquid separation so as to obtain a 2,6-naphthalic acid product.The method provided by the invention overcomes the problems of low solubility of 2,6-naphthalic acid in solvents, great slurry circulation volume and high energy consumption in the prior art.

The invention provides a water-soluble organic humic acid fertilizer and application thereof to promotion of plant yield increment and soil improvement. The preferable water-soluble organic humic acid fertilizer is prepared from compound microorganisms and the following raw materials in parts by weight: 35 parts of water-soluble potassium humate, 16 parts of urea, 9 parts of potassium sulfate, 8 parts of monoammonium sulfate, 3 parts of zinc sulfate, 4 parts of borax, 2 parts of ammonium molybdate, 1.2 parts of hxanoic acid 2-(diethylamino) ethyl ester, 0.9 part of compound sodium nitrophenolate, 0.9 part of alpha-sodium naphthylacetate and 40 parts of water, wherein the total biomass of compound microorganisms in every kg of the water-soluble organic humic acid fertilizer is larger than or equal to 1.2*10<10>cfu. In addition, the invention also provides application of the water-soluble organic humic acid fertilizer to promotion of plant yield increment and soil improvement.

The invention provides a kind of high-purity 2,6 naphthalene dicarboxylic acid production method, comprises the following steps: (1) thick 2,6 naphthalene dicarboxylic acid is mixed with water, forms thick 2,6 naphthalene dicarboxylic acid slurry, (2) Heating the crude 2,6-naphthalene dicarboxylic acid slurry to 300°C-375°C, 8MPa-22MPa subcritical state; (3) cooling and crystallizing the dissolved 2,6-naphthalene dicarboxylic acid, (4) cooling crystallization The 2,6-naphthalene dicarboxylic acid slurry is subjected to solid-liquid separation to obtain high-purity 2,6-naphthalene dicarboxylic acid product; The problem of high circulation volume and high energy consumption.

A circulating fluidized bed decomposing and crystallizing device and a decomposing and crystallizing method, comprising a decomposing and crystallizing device body, a mother liquid overflow tank is arranged on the upper part of the decomposing and crystallizing device body, an inner guide tube and an outer guide tube are arranged in the decomposing and crystallizing device body, The lower part of the crystallization device is provided with a crystal slurry discharge pipe, and the bottom of the decomposition crystallization device body is provided with a liquid replenishment port. The decomposition crystallization device body is provided with a main stirring device. A liquid distribution plate is provided in the body of the crystallization device, and the liquid distribution plate is located between the crystal slurry discharge pipe and the liquid replenishment port; the present invention also includes a circulating fluidized bed decomposition and crystallization method, which can be used for light halogen Stone decomposition and crystallization to prepare potassium chloride can also be used in the crystallization production of potassium chloride and sulfate double decomposition crystallization to prepare potassium sulfate, reduce the aspect ratio of the decomposition crystallization device, and increase the average particle size of the product while reducing the entrainment rate of raw materials.

The invention relates to the technical field of iron and steel metallurgy, and discloses a method for improving the quality of vanadium titanium magnetite concentrate sinter. The method comprises thefollowing steps: (1) drily mixing a sintering raw material and return mine, and thus obtaining a dry material; (2) adding water to the obtained dry material for primary mixing and secondary mixing, and controlling the water content of the obtained sintering mixture to be 7-7.2 wt%; and (3) distributing, igniting and sintering the obtained sintering mixture. High-grade vanadium titanium magnetite concentrate is added into vanadium titanium magnetite concentrate, and meanwhile the water content of the sintering mixture and the ratio of active ash in the sintering raw material are controlled to improve the tumbler strength of the sinter, so the quality of the vanadium titanium sinter is improved.

The invention relates to a crystallization method with a fine crystal elimination, which mainly solves the problems of small crystal granularity and frequent crystallizer cleaning in the prior art. The invention is characterized in that crystallized clear mother liquor in a kettle-type crystallizer flows out from the upper part of the crystallizer, the crystallized clear mother liquor is divided into two streams, a first stream I of the crystallized clear mother liquor which takes account for 5-95% of weight is discharged, a second stream II of the crystallized clear mother liquor which takes account for 5-95% of weight enters in an intermediate groove; crystal slurry in the kettle-type crystallizer flows out from the lower part of the crystallizer and separated by a solid-liquid separator to obtain crystals, and crystallized and filtered mother liquor; crystals as products are discharged, the crystallized and filtered mother liquor is divided into two streams, a first stream I of the crystallized and filtered mother liquor which takes account for 5-95% of weight is discharged, a second stream II of the crystallized and filtered mother liquor which takes account for 5-95% of weight enters in the intermediate groove or directly returns to the kettle-type crystallizer; the raw material enters into the intermediate groove, the material in the intermediate groove is performed heat exchange through a tubular type crystallizer and returned to the kettle-type crystallizer; wherein the weight ratio of the crystallized clear mother liquor to the crystallized and filtered mother liquor is 0.1:1-10:1. The technical scheme better solves the problems, and can be used in industrial crystallization production.

The invention specifically relates to a method for recycling high-quality industrial salt from desulfurization wastewater of a coal-fired power plant. The method comprises the following steps: performing chemical precipitation, flocculation and softening pretreatment of the desulfurization wastewater of a coal-fired power plant; adding magnetic biochar and performing advanced removal of heavy metals; and performing semi-continuous evaporative crystallization, wherein the water quality of the recycled condensate water can reach the water supply standard of Water Quality for Industrial Boilers of GB / 1576-2008, and the quality of recycled industrial salt product reaches the secondary standard of national refined industrial salt of GB / T 5462-2003. The method provided by the invention has the advantage of high quality of recycled industrial salt product and realizes resource utilization in the treatment process of desulfurization wastewater of the coal-fired power plant.

The present invention relates to a kind of manufacturing method of heterosexual rubber magnetic powder, according to the following steps: (1) the molar ratio of each raw material satisfies the molecular formula SrO nFe2O3; (2) mixing materials; Burning; (4) Mixing and fine grinding; (5) Tempering; (6) Washing treatment; (7) Drying, crushing, sieving, and finished product; wherein, the molar ratio of the main raw materials satisfies the molecular formula SrO·nFe2O3. In addition, the best sintering temperature A of SrO·nFe2O3 strontium ferrite: 1090°C-1100°C, heat preservation for 1-2 hours, and the sintering temperature B: 1065-1075°C. The manufacturing method of the heterosexual rubber magnetic powder of the present invention can significantly improve the performance of the magnetic powder and the particle size of the finished product, so as to improve the physical properties of the rolled sheet and solve the problem of difficult upper roll during subsequent processing.

The invention relates to a crystallizing method utilizing external circulation of crystal slurry, and is mainly used for solving the problems of small crystal particle size and frequent cleaning of a crystallizer in the prior art. The crystallizing method is characterized in that: the raw materials are introduced into a kettle type crystallizer for crystallization, the crystal slurry in the kettle type crystallizer flows out from the lower part of the kettle type crystallizer by two parts, the crystal slurry I is subjected to separation by a solid-liquid separator to obtain crystals and crystal filtration mother liquor, and the crystal slurry II is subjected to heat exchange by a sleeve type crystallizer and then returned to the kettle type crystallizer, wherein the weight ratio of the crystal slurry I to the crystal slurry II is (1:1)-(1:50); and the crystals are used as a product to be discharged, the crystal filtration mother liquor is divided into two parts, the first part namely crystal filtration mother liquor I which accounts for 5-95wt% of the crystal filtration mother liquor is discharged, and the second part namely crystal filtration mother liquor II which accounts for 5-95wt% of the crystal filtration mother liquor is returned to the kettle type crystallizer together with the crystal slurry II. The technical scheme that the raw materials are introduced to the kettle type crystallizer directly or being mixed with the crystal slurry II better solves the problems, thus the crystallizing method can be used in industrial crystal production.