摘要:
The present invention describes a procedure for enhancing kaolinitic clays characterized in that it comprises the steps of obtaining an aqueous suspension of clay; removing of the fraction greater than 60 μm using physical separation procedures; classifying of the clay in suspension on the basis of the particle size, using mechanical means; treating of the fraction with the smallest particle size; removing the water in the suspension in order to obtain the cake; and washing the cake with water in order to reduce the content of soluble salts, such as sulphates and carbonates, before draining. This procedure permits increasing the content of clayey material, removing the unwanted large particles, increasing the whiteness of the clays after baking and reducing the percentage of defects after baking.
摘要:
The disclosed invention relates to a blended hydrous kaolin clay product comprising a platy coarse kaolin clay and a fine, hydrous kaolin clay. The blended kaolin clay product is suitable for use as a raw material component in the formation of cordierite products.
摘要:
A procedure for enhancing clays so that they can be used in ceramic products to increase the content of clayey material, to remove the unwanted large particles, to increase the whiteness of the clays after baking and to reduce the percentage of defects after baking comprising the steps of obtaining an aqueous suspension of clay; removing of the fraction greater than 60 µm using physical separation procedures; classifying of the clay in suspension on the basis of the particle size, using mechanical means; treating of the fraction with the smallest particle size; removing the water in the suspension in order to obtain the cake; and washing the cake with water in order to reduce the content of soluble salts, such as sulphates and carbonates, before draining.
摘要:
Disclosed herein are organo-neutralized calcined kaolin comprising calcined kaolin treated with at least one basic organic compound, a composition' comprising the organo-neutralized calcined, and use of the organo-neutralized calcined kaolin in silicone rubber formulation. Further disclosed herein are a method of making the organo-neutralized calcined kaolin and a method of making a silicone rubber formulation comprising the organo-neutralized calcined kaolin.
摘要:
The present invention relates a composition promoting the growth, and increasing preservative capability of human body, animals and plants. The composition of the present invention maximizes physiological activity of human body, animals and plants. In addition, the present invention relates a producing method of the composition composed of the following steps: 1) preparing a composition containing kaoline (white soil) 30-40 wt %, potassium sulfate 15.0-20.0 wt %, sodium sulfate 13.0-17.0 wt %, feldspar 12.0-16.0 wt %, talc 12.0-16.0% and ferric oxide 0.5-1.5 wt %; and 2) mixing the above-mentioned composition using a compressed molding method; and 3) heating the mixed composition at 1000-1300° C.The composition of the present invention can be used in whole fields of industries, and will cause the original changes in the field of industrial matters, and promote the welfare of human beings such as improvement of health and life of human.
摘要:
The present invention relates to calcined kaolin having an unusually narrow particle size distribution. The calcined kaolin can have a particle size distribution wherein: (I). The calcined kaolin may be prepared from a hydrous kaolin having a particle size distribution, wherein: (II). The calcined kaolin can be used in many applications, such as paint and coating compositions for paper or paper board, and more generally, the inventive products may be used wherever calcined kaolins are used.
摘要:
The invention relates to a method for manufacturing a brick, ceramic or similar article. Traditionally the manufacture of bricks, roofing tiles and pipes has been an energy intensive process. Increasing commercial and environmental demands are drivers to reduce energy requirements the generation of so-called greenhouse gasses. By the addition of finely milled glass, as a fluxing agent, the firing temperature has been reduced. This has had the added benefit of reducing fluoride emissions from the articles during firing. The invention overcomes problems associated with the prior art by providing a method for manufacturing a brick or similar article comprising the steps of: producing a clay mix by mixing milled clay with a fluxing agent, forming the mix and firing it to produce finished brick or ceramic articles, characterised in that the clay mix is capable of being fired at a lower temperature.
摘要:
A method of manufacturing large thin wall ceramics board includes pulverizing and uniformly mixing, in dry content conversion, plasticity clay in an amount of 30-40% by weight, wollastonite having an aspect ratio of more than 10 in an amount of 20-50% by weight, and feldspar and talc in an amount of 10 50 % by weight to form a mixture. The mixture is added with a solution having a 16-21% weight of the weight of this mixture. The solution has 10% by weight of a paraffin emulsion. The clay-like composition is extruded with a vacuum kneading machine to form a cylindrical shape. The extruded clay-like composition is made into dough board compact of desired thickness after being partially cut parallel to the cylinder. The dough board compact is heated to approximately 80 degrees Celsius with far infrared radiation. The heated dough board is transported on a heat proof metal mesh belt having temperature of between 80 and 150 degrees Celsius, and then gradually heated and dried at 150 to 350 degrees Celsius to dehydrate the dough board. The dehydrated bough board is baked at 1000-1200 degrees Celsius in roller hearth kiln combustion heating device.
摘要:
A process for preparing a silicate porous product, which comprises a step of forming a clay mineral into a dispersion by means of a dispersant, a step of removing gases dissolved in the dispersion, a step of freezing the dispersion and drying it in its frozen state under reduced pressure, and a step of firing the dried product obtained by the drying.
摘要:
A method of making a rheology modified aqueous composition, particularly useful for drilling, milling and mining applications, is disclosed. The method includes admixing, with a clay and water, a material or materials whose constituents substantially conform to the proportions of the empirical formula M'mM''n(OH)¿(2m+3n+qa+br)(A?q)a(Br)b.xH2O, where M' represents at least one divalent metal cation and m is an amount of from greater than zero to about 8; where M'' represents at least one trivalent metal cation and n is an amount of from greater than zero to about 6; where A is an anion or negative-valence radical that is monovalent or polyvalent, and a is an amount of A ions of valence q, provided that if A is monovalent, a is from greater than zero to about 8, and if A is polyvalent, a is from greater than zero to about 4; where B is a second anion or negative-valence radical that is monovalent or polyvalent, and where b is an amount of B ions of valence r and b is from zero to about 4; provided (m+n) is greater than or equal to 1; further provided that qa+br cannot be greater than 2m+3n and provided that qa cannot equal 2m+3n; and still further provided that (2m+3n+qa+br) is less than 3; and where xH2O represents excess waters of hydration, with x being zero or more. Calcined hydrotalcite and hydrotalcite-like materials are particularly preferred as starting materials. Optionally, an aluminum oxide, a nitrogen-containing compound, or both may be added. The resulting composition is preferably an elastic solid exhibiting stress-dependent fluidity, desirable temperature resistance, inhibition of reactivity, relatively low cost, and pressure resistance. A dry composition and method of making are also disclosed.