68 results about "Kaolin product" patented technology

A process for preparing the calcined kaolinite includes such steps as dressing ore, crushing, pulverizing by 325 meshes, mixing with water and disperser, pulverizing by 4500-6000 meshes, drying, pulverizing, calcining at 970-990 deg.C for 30-40 min while adding whitening agent, and breaking. Its features high whiteness and fineness.

The present invention relates to a manufacturing technique of kaolin with high viscosity and concentration. A manufacturing technique of kaolin with high viscosity and concentration is characterized by comprising following procedures: 1) manufacturing kaolin slurry J with kaolin extracted by hydraulic machinery method undergoing pulping, classification, chemical bleaching, iron removal by washing, dehydrating through pressure filters, dispersed pulping, exfoliation, vibration screen classification ; 2) spray drying and intercalation which is accomplished by a) firstly, improving product lines of a spray drying equipment, that is, adding a thermal insulation layer to a packing auger, a lift pot and a storage hopper of the spray drying equipment, and then arranging a variable frequency feeding machine communicated with a urea crusher through pipelines on the packing auger of the bottom of a spray drying mouth of the spray drying equipment; b) spray drying to achieve kaolin powder; c) intercalating intercalation agent urea with the kaolin powder through the variable frequency feeding machine with parameter of a fresh feed pump between 2 HZ and 8 HZ and with additional of mass of the intercalation agent urea between 2 percent and 10 percent of the mass of the kaolin powder; thereby getting final kaolin products with viscosity and concentration between 72 percent and 73.7 percent. The manufacturing technique can produce kaolin with high viscosity and concentration.

A binder mix containing a hydraulic binding agent and an admixture mixed therewith, a process for preparing a hydraulically hardened binder mass, a calcinated kaolin product and a process for preparing the same. A paste-like composition is formed from the hydraulically hardening binding agent, a pozzolanically reacting admixture and water, which, when so desired, contains stone aggregate or similar filler, the paste-like composition is worked and the worked composition is allowed to harden to form the binder mass. The admixture comprises spherical, porous metakaolin agglomerates, the size of which is 2-200 microns and which have an open pore structure. The invention can be used to improve the manufacturing methods of cast concrete products and shorten the manufacturing times, and to provide concrete with better mechanical and chemical properties, as well as improve the fire and frost resistance of concrete.

The invention bleaching and viscosity decreasing process for paper-making paint kaolin clay. The method adds in water, and sodium hexametahposphate into raw ore, and they are classified through triple-stage whirlcone. The tail ore are abolished, then carries on spiral classification, the bottom current is carried on with filler process, the outputted pulp are processed with high grad magnetic concentration, the iron-containing tail ore is abolished, then carries on centrifugation and desiccation, filtering desiccation, surface activating process, and dries them. The scheme is reasonable, easy to be controlled, the quality of the product is stable, the white rate of kaolin clay reach aboe 70%.

The invention discloses a method for processing low-grade kaolinite ore. The method comprises the following steps of: pulping crude kaolinite ore, washing sand, classifying fine mortar with a hydraulic cyclone I, overflowing to obtain a kaolinite product, screening coarse sand with a vibration screen of 0.55 millimeter, feeding screen overflow into a rod mill, feeding screen underflow into a sedimentation classifying process, making overflow and bottom flow of the hydraulic cyclone I enter a ball mill together, performing ore grinding, classifying with a hydraulic cyclone II, and separating overflow serving as mica powder and bottom flow serving as tailings; magnetically separating sedimentation-classified settled sand with a high-gradient magnetic separator to obtain a nonmagnetic product serving as concentrated ore and a magnetic product serving as tailings; and floating the magnetically-separated nonmagnetic product to obtain concentrated quartz sand. The method has a reasonable process design, a stable production process and good economic and social benefits, and is easy to control; kaolinite, mica and quartz can be separated from low-grade kaolinite ore; and meanwhile, the resource utilization ratio is increased.

This invention relates to a fluid-state instantaneous calcining technique for calcining kaolin. The technique comprises a flue gas generating system, a loading system, a fluid-state calcining system, a gas-solid separating system and a post-calcining system. The material is loaded into the fluid-state calcining system by the loading system, where it is mixed with high-temperate flue gas flow generated by the flue gas generating system for instantaneous calcining. The calcined material is introduced into the gas-solid separating system, and the collected solid is then introduced to the post-calcining system for whitening treatment. The instantaneous calcining time is adjusted by the valve. The method can realize large-scale and continuous industrial manufacture, and can effectively reduce the time and energy consumption of post-calcining whitening treatment. The calcined kaolin product has improved oil-absorbency, hiding contrast rate and light extinction performance.

A preparation method of nano kaolin comprises steps of: adding kaolin ore into water by a weight ratio of 1:75 for magnetic force stirring; successively adding deferrization agent, intercalator and surfactant in the slurry solution for continuous normal temperature stirring; filling the mixed solution into an autoclave, screwing a cover of the autoclave, carrying out a constant temperature hydrothermal reaction at 150-170 DEG C, and naturally cooling the autoclave to room temperature; taking out solid powder in the autoclave, and washing the solid powder till a pH of a washing liquid close to 7; and finally drying the solid powder to obtain a target nano kaolin product with high grade. The whole process of the invention has the characteristics of simple operation, low cost and strong feasibility; especially, steps of mixing the three reagents including deferrization agent, intercalator and surfactantand, with the kaolin slurry, and then conducting hydrothermal reaction obviously have advantages of simple process, high repeatability and no secondary pollution; and the nano kaolin prepared by the reparation method has a scale-like micro-morphology, large specific surface area, and good dispersibility in water.

The invention relates to a method for whitening kaolin by using a surface cladding method. The method comprises adding water and a dispersant into the kaolin to prepare slurry with a concentration of 40 to 60 %, adjusting a pH value to 7 to 8, and ball milling for 60 to 120 minutes with a high speed so as to fully activate the surface of the kaolin particles; and then adding an aluminum sulfate or aluminum nitrate solution into the kaolin slurry, fully mixing with stirring, slowly adding ammonia water, continuing to stir and react, standing, filtering and drying to obtain the highly whitened kaolin product. Through detection, the surface of the kaolin product is coated with an Al(OH)3 deposited layer which can shield dyeing substances in the kaolin and significantly improve whiteness of the product. The whitened kaolin through cladding can be used as papermaking paint, and especially as high-quality filling materials in the fields of plastic, rubber, etc. The implementation of the method can greatly increase added value of the low-quality kaolin, enlarge application scope of the low-quality kaolin and improve utilization efficiency of mineral resources.

The invention discloses a decarbonization process for coal series kaolin. The decarbonization process comprises crushing, grading, reselection, reselected medium-density product crushing or ore grinding, and flotation and specifically comprises the steps of crushing coal series kaolin raw ore, and grading crushed products; feeding coarse particle products obtained by grading into reselection equipment for sorting to obtain reselected low-, medium- and high-density products; mixing the reselected medium-density products subjected to crushing or ore grinding with fine particle products obtained by grading and feeding into flotation equipment for sorting to obtain flotated foam products and products in a flotation tank; recycling the reselected low-density products and the flotated foam products which are coal resources, and recycling the reselected high-density products and the products in the flotation tank which are kaolin. According to the process, organic carbon in the coal series kaolin can be efficiently removed, and kaolin products which are higher in purity and more applicable to further deep processing are obtained; furthermore, the decarbonization process can efficiently recycle and use the organic carbon, so that waste of the coal resources is avoided, and the environment is protected.

The invention discloses a comprehensive utilization method of sandy kaolin tailings containing tourmaline, mica and quartz sand. The method comprises the following steps that after the sandy kaolin tailings are subjected to screening operation, various products such as mica powder, kaolin, the tourmaline, fragment-grade mica, quartz sand, and magnetic tailings are separated through grinding of coarse products, stirring and rinsing of fine products, hydrocyclone classification, high-frequency vibrating screen screening, and magnetic separation, gravity separation and flotation combined beneficiation process flows by using an electromagnetic slurry magnetic separator, a wet-type plate magnetic separator, a vertical-ring high-gradient magnetic separator, a shaking table, a flotation machine and like. According to the method, the magnetic separation, the gravity separation and the flotation combined beneficiation process is adopted, concentrate products such as the high-quality quartz sand, the tourmaline, and the mica are obtained, meanwhile, the residual kaolin products are recovered; and magnetically separated ferric silicate minerals can be used as building materials or cement rawmaterials, the comprehensive recovery utilization rate of secondary resources of the kaolin tailings is improved to the greatest extent, zero discharge of the tailings is achieved, and high economicaland social benefits are achieved as well.

The invention relates to a method for bleaching high-concentration kaolin pulp. The kaolin pulp concentration is 25%-30%. The method comprises the following steps: adding an alkaline agent to water, mixing and adding rongalite to prepare rongalite aqueous solution, wherein, the weight ratio of sodium hydroxide to sodium carbonate in the alkaline agent is 0.33-0.47:10, the weight ratio of the rongalite to the alkaline agents is 100:10.3-10.5, rongalite volume concentration of the rongalite aqueous solution is 10-15% and the pH value of the rongalite aqueous solution is 7.0-8.0; delivering the rongalite aqueous solution and the high-concentration kaolin pulp to a conduit by a pump for mixing, and delivering the mixture to a pulp storage tank, wherein, the added amount of the rongalite aqueous solution is 1.4-2.3% of that of the high-concentration kaolin pulp; and keeping standing and bleaching for 15-20 hours, and adjusting the pH value of the pulp to 2.5-3.0 after bleaching. The method has the advantages of reasonable technical proposal, easy control of operation, stable process, and the bleached high-concentration pulp is beneficial to subsequent filter pressing dehydration processing, which improves the production capacity, reduces the energy consumption and medicament consumption, lowers the production cost and stabilizes quality of kaolin products.

The invention discloses a preparation method for high-oil-factor ultra-fine kaolin. The preparation method comprises the following steps of (1) drying kaolin raw ores in a drying box, and then smashing the kaolin raw ores; (2) mixing the smashed kaolin and water to obtain serous fluid, adding sodium dithionite and sodium polyacrylate in the serous fluid, electrically stirring the mixture at normal temperature, then adding sulfuric acids or hydrochloric acids and hydrogen peroxide in the mixture, and continuing stirring the mixture intensely; (3) pumping the serous fluid prepared from the step (2) in a grinding mill, grinding the serous fluid, and adding sodium dodecyl sulfate in the serous fluid in a grinding process; (4) performing solid and fluid separation on the serous fluid prepared from the step (3) by using a filter press to obtain filter cakes; (5) drying and distributing the filter cakes, and spraying the filter cakes by using a spraying machine to obtain kaolin raw powder; and (6) scattering and roasting the kaolin raw powder, annealing naturally, cooling the roasted kaolin powder at normal temperature, and scattering the kaolin powder to obtain the high-oil-factor ultra-fine kaolin products. In a preparation process, screen tailings of the products do not exceed standards, the obtained products is non-corrosive, is low in viscosity, and can be scattered in liquor easily.

A kaolin bleaching method is characterized by comprising steps as follows: water is added to kaolin raw ore, a raw stock is formed and subjected to sand removal and stage treatment by a hydrocyclone, and slurry is prepared; sulfuric acid is added to the slurry, the pH (potential of hydrogen) is adjusted to range from 2.0 to 3.0, and the slurry is placed in a closed container with a stirring function; the solid content of kaolin in the slurry in the closed container is measured, sodium hydrosulfite is added, and the adding amount of sodium hydrosulfite is 0.5%-1% of the solid content of the kaolin; then, the mixture is stirred for 4-8 min each time and reacts for 4-8 h; sodium hydrosulfite is added to the slurry obtained in the third step, and the adding amount of sodium hydrosulfite is 0.5%-1% of the solid content of the kaolin; the mixture is stirred again for 4-8 min each time and reacts for 4-8 h; after a reaction ends, EDTA (ethylene diamine tetraacetic acid) is added, the adding amount of EDTA is 0.1%-0.5% of the solid content of the kaolin, and the mixture is stirred uniformly; filter pressing is performed, and a bleached kaolin product is obtained. By means of the bleaching method, a remarkable deironing and whitening effect can be achieved, and the market price of the kaolin product is greatly increased.

The invention relates to a preparation method of modified kaolinic, which comprises the steps of surface modification and vulcanization of the kaolinic, particularly comprises the steps of: adding the kaolinic to a high-speed mixer to be stirred; and sequentially adding 1.5% of hexadecyl trimethyl ammonium bromide, the mixture of 2% of engine oil and 2% of silane, 2% of titanate in parts by mass of the karolinic at 50 to 80 DEG C and continuously stirring for 20min to prepare modified kaolinic products. The modified kaolinic is filled into butadiene styrene rubber to prepare kaolinic/butadiene styrene rubber composite materials by utilizing the vulcanization formula; and the mechanical property of the composite materials reaches the requirements on Import and Export Bicycle Tyre Physical and Mechanical Property National Standards GB/T1153-2002. The invention provides a simple modification technology and an industrial modification medicament to the surface modification of the kaolinic; the modification effect is good; and the prepared kaolinic/butadiene styrene rubber composite materials have the advantages of excellent mechanical properties, high cost performance and wide application prospects.

The invention discloses a preparation method of a kaolin product used for a catalytic cracking catalyst, which comprises the steps of sully preparation, grading, bleaching, mixing and drying in sequence. The prepared kaolin product is used for preparing the catalyst used in catalytic cracking technology of petroleum chemical industry. The invention changes the method of mixing first and then sorting used for preparing the kaolin product of the exsiting domestic kaolin enterprises. The method, aiming at different raw materials, adopts a unique selecting technology to prepare the kaolin product with moderate degree of order and the contents of kaolinite (platelets) and halloysite (tubes) in the product are controlled effectively.

The invention belongs to the technical field of coal gangue treatment, and in particular relates to a method for preparing kaolin from coal gangue. To solve the problems of poor performance and low quality of kaolin produced by calcining kaolin from coal gangue, the steps include (1) ore washing: (2) adding calcium oxide, (3) suspension preheating, (4) adding titanium dioxide for mixing, (5) Calcination (6) Send nitrogen-oxygen mixed gas for cooling, and the oxygen content accounts for 5% of the total mass of the mixer. (7) Break up and classify: use a breaker to control the particle size of the materials in the silo to 1-2 μm. The kaolin processing process of the present invention is optimized, which solves the problem of insufficient whiteness of the product due to difficult carbon removal during the calcination process; only a small amount of high-quality titanium dioxide is added to improve the whiteness of the overall kaolin product.

A process of producing a kaolin product for paper coating includes mining kaolin ores by hydromechanization and then producing kaolin slurry; classifying by centrifugal sedimentation; chemical bleaching; eliminating iron ions by circular rinsing; removing water by pressure filtration; producing slurry by dispersing filter cakes, in which complex dispersants, pH adjustor and intercalator are added; delaminating; classifying by vibrating sieve; and spray drying: spray driers are restructured by adding insulating layers on packing auger, elevator scoop and bunker at first; the kaolin slurry J which has passed through vibrating sieves is dried in high speed centrifugal spray drying tower and the moisture of kaolin powder is controlled in 3 wt. %-5 wt. %, and the kaolin product for paper coating is obtained. The process characterizes in stable properties, high efficiency, and high viscosity content and fine particle size of the kaolin products produced.

The invention relates to a method for recovering ion-type rare earth from clay mineral, especially to a method for extracting rare earth from a kaolin product containing ion-type rare earth. The technology contains the following steps of: pretreating, smashing into a paste, leaching ore, carrying out plate pressure filtration and carrying out subsequent processing to finally prepare the rare earth product and kaolin. By the paste smashing technology, the kaolin product and a leaching solution are fully mixed, thus solving the defect of poor permeability of kaolin. The plate pressure filtration technology is adopted to solve the defect that it is hard to separate a solid from a liquid in the kaolin. By the adoption of the method, ion-type rare earth in the kaolin product can be fully recovered, resources can be effectively utilized, and enterprise benefits can be greatly increased. The whole technology is adopted to realize fully-closed circulation and thoroughly solve the environmental pollution problem caused by sewage discharge.

The invention relates to a preparation method of kaolin for high-performance honeycomb ceramic, which is characterized by sequentially comprising the following steps: crushing; pulping; selectively flocculating; settling, controlling the mass concentration of the ore pulp at 12-18%, adding water glass of which the mass concentration is 7-13% and sodium hexametaphosphate, measuring the temperature and liquid level of the ore pulp in a settling basin, calculating the settling time according to a simplified empirical formula t=Tn*h/d2 based on the Stokes law (wherein d in the simplified formula represents the granule size of granules and is valued at 3), and standing at the settling time, wherein after standing, the granule size of granules of the underlayer ore pulp is more than 3 micrometers, and the granule size of granules of the supernatant ore pulp is less than 3 micrometers; and performing vacuum filtration, drying, and granulating to ensure that the mass percent of Fe2O3 contained in the kaolin product is less than or equal to 0.20%, the sum of the mass percents of contained K2O and Na2O is less than or equal to 0.4%, the content of granules of which the granularity is less than 2 micrometers is more than or equal to 91% and the bulk density is 0.30-0.36g/cm<3>. Thus, the invention satisfies application in high-performance honeycomb ceramic industry.

The invention discloses a deironing process for kaolin, belonging to the field of kaolin production. The deironing process comprises the following steps: 1, putting a kaolin filter cake into a sulfuric acid pool, and uniformly dispersing the kaolin filter cake; 2, introducing hydrogen peroxide, carrying out stirring for 5-10 minutes, and keeping the pH value of the solution in the sulfuric acid pool to be 1-2; 3, feeding barium thiocyanate into the sulfuric acid pool, wherein a ratio of barium thiocyanate to the kaolin filter cake in the step 1 is 1: (100-150), and carrying out standing for 5-10 min to obtain de-ironed ore pulp; 4, sampling the de-ironed ore pulp, carrying out filtering to obtain a kaolin-removed solution, and if the solution is red, introducing the de-ironed ore pulp in the step 2 into a sulfuric acid solution for replacement and washing and then cyclically repeating the step 3 and the step 4, or if the solution is transparent, carrying out step 5; 5, washing the de-ironed ore pulp obtained in the step 3 with clear water, and carrying out filter pressing to obtain a secondary kaolin filter cake; and 6, drying and pulverizing the secondary kaolin filter cake to obtain a finished kaolin product. The deironing process has the advantages that the iron content in the kaolin is reduced, the whiteness of the kaolin is improved, and the applicability of the process ishigh.

The invention discloses an aperture and particle size monodisperse controllable mesoporous silicon rapid hemostatic powder and a preparation method. The preparation method includes: 1) adding cetyl trimethylammonium bromide into water, and conducting nitrogen purging under stirring; 2) under stirring, adding n-octane, methyl methacrylate, tetraethyl orthosilicate and azobis(isobutylamidine hydrochloride) into the liquid obtained in step 1) in order, using lysine or tris(hydroxymethyl)aminomethane to adjust pH, carrying out reaction, and then performing standing to obtain a milky white suspension; 3) centrifuging the milky white suspension, and conducting centrifugal washing with anhydrous ethanol; and 4) in an air atmosphere, conducting calcination to remove a mesoporous template to obtain the white aperture and particle size monodisperse controllable mesoporous silicon rapid hemostatic powder. The hemostatic powder provided by the invention can stop bleeding rapidly, and is suitable for pre-hospital emergency treatment of serious bleeding patients, and has the characteristics of very fast hemostatic rate, hemostatic effect superior to chitosan and kaolin products, good biological and tissue compatibility, and no side effect.

Disclosed herein are granulated kaolin compositions exhibiting at least one of improved material handling properties, low dusting during transit, easy make-down into mineral-water slurries, and requiring less energy to produce than spray dried kaolin products. The granulated kaolin compositions may, in one embodiment, be characterized by a moisture content ranging from about 12% to about 23% by weight relative to the total weight of the composition. In another embodiment, the granulated kaolin compositions may have an average granule size of greater than about 10 mesh. Also disclosed herein are granulated kaolin compositions having a moisture content ranging from about 12% to about 23% by weight relative to the total weight of the composition, wherein the composition is friable when subjected to a shear force. Further disclosed herein is a method for producing granulated kaolin compositions comprising mixing at least one kaolin slurry with at least one predispersed spray dried kaolin and agglomerating the resulting mixture. Still further disclosed herein is a system for producing granulated kaolin compositions comprising a first zone for mixing at least one kaolin slurry with at least one predispersed spray dried kaolin and a second zone for agglomerating the resulting mixture.

The invention relates to the preparation technology of kaolin from gangue, and concretely relates to a process for preparing calcined kaolin for electrophoretic paint from gangue. The process solves the problem of lower index existed in prior preparation of kaolin from gangue, and the process for preparing calcined kaolin for electrophoretic paint from gangue is provided. A route of the process comprises the following steps: preparation of gangue raw ore; primary dry method deironing; fragmentation; secondary dry method deironing; dry method ore grinding; tap water is added into partial raw materials and partial clinker for pulping; primary wet method deironing; wet method ore grinding; secondary wet method deironing; sieving with a 200 mesh sieve, a 325 mesh sieve, and a 500 mesh vibrating screen; third-time wet method deironing; primary drying; scattering; calcining; scattering; and obtaining of the product. The process solves the problems of fineness and conductivity of calcined kaolin products for electrophoretic paint, and the product quality can satisfy requirements of clients for the granularity index, the conductivity index and the like of the calcined kaolin products for electrophoretic paint.

The present invention relates to a hydrous kaolin product having improved optical properties, for example, when used in the production of paper products. The present invention comprises an improved barrier coating for paper and a method of making the coated paper. The present invention also comprises an improved method from making filled and coated paper products. The present invention uses a composition comprising kaolin having a shape factor of at least about 70:1, such as at least about 80:1 or at least about 100:1.