Preparation method of calcined kaolin with high oil absorption

A technology of calcined kaolin and high oil absorption, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as not easy to disperse, equipment corrosion, and product sieve residue exceeding the standard, and achieve easy dispersion and non-corrosiveness The effect of viscosity

Active Publication Date: 2012-06-13
唐山麦迪逊高岭土股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these two kinds have higher requirements on the purity and particle size of the additives, otherwise the sieve residue of the product will exceed the standard.
Make anhydrous chloride easy to deliquescence and difficult to preserve, and anhydrous CaCl under heating conditions 2 and anhydrous MgCl 2 There is a certain corrosion to the equipment, and the requirements for the equipment are relatively high
The kaolin produced by these two methods has high viscosity and is not easy to disperse in the solution, which is extremely unfavorable to customers
[0006] Application No. 201110027684.0 Chinese Patent "A Simple Method for Improving the Oil Absorption Value of Calcined Kaolin" is similar to the method of Application No. 200910272931.6, except that the added agent is replaced by Na 2 S crystal, the drug is easy to deliquescence and difficult to store, and the poor control of drug particles will cause the sieve residue to exceed the standard

Method used

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  • Preparation method of calcined kaolin with high oil absorption
  • Preparation method of calcined kaolin with high oil absorption
  • Preparation method of calcined kaolin with high oil absorption

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Experimental program
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Effect test

Embodiment 1-3

[0021] Embodiment 1-3: The preparation method of the high oil absorption calcined kaolin adopts the following process.

[0022] Coal series kaolinite is screened, ore washed, crushed, milled, stripped, and spray-dried to form raw meal. The raw meal is depolymerized and dispersed, then calcined into clinker, and finally the clinker is depolymerized and dispersed to obtain calcined Kaolin.

[0023] 1. Raw ore ratio: Shanxi Hunyuan Coal Measures Kaolinite 40~50wt%, Shanxi Huairen Coal Measures Kaolinite 30~40wt%, Shanxi Tashan Coal Measures Kaolinite 10~30wt%;

[0024] According to the composition content of each raw ore, it is configured into the following three weight ratios of coal-measure kaolinite ore blending:

[0025] (1) SiO 2 : 44.5%; Al 2 o 3 : 39.5%; Fe 2 o 3 : 0.1%; TiO 2 : 0.9%; LOI: 15%.

[0026] (2) SiO 2 : 45.8%; Al 2 o 3 : 37%; Fe 2 o 3 : 0.2%; TiO 2 : 1.0%; LOI: 16%.

[0027] (3) SiO 2 : 46.5%; Al 2 o 3 : 38.15%; Fe 2 o 3 : 0.25%; TiO 2 : 1....

Embodiment 4-6

[0049] Embodiment 4-6: The preparation method of the high oil absorption calcined kaolin adopts the following process.

[0050] The kaolin is screened, ore washed, crushed, milled, stripped, and spray-dried to form a raw meal. The raw meal is depolymerized and dispersed, and then the clinker is calcined. Finally, the clinker is depolymerized and dispersed to obtain calcined kaolin.

[0051] 1. Raw ore ratio: Maoming kaolin 60-80wt%, Longyan kaolin 20-40wt%

[0052] According to the composition content of each raw ore, it is configured into the following three kinds of kaolin ore blending ratios by weight:

[0053] (1) SiO 2 : 44.5%; Al 2 o 3 : 39%; Fe 2 o 3 : 0.2%; TiO 2 : 1.1%; LOI: 15.2%.

[0054] (2) SiO 2 : 45.5%; Al 2 o 3 : 39.5%; Fe 2 o 3 : 0.2%; TiO 2 : 0.8%; LOI: 14%.

[0055] (3) SiO 2 : 46.5%; Al 2 o 3 : 37%; Fe 2 o 3 : 0.1%; TiO 2 : 0.4%; LOI: 16%.

[0056] 2. Raw meal depolymerization and breaking up parameters

[0057] Current: 150-170A

[0...

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Abstract

The invention discloses a preparation method of calcined kaolin with high oil absorption. According to the preparation method, coal-series kaolinite or kaolin undergoes screening, ore washing, crushing, milling, grinding and spray drying to obtain a raw material. the raw material undergoes depolymerization, breaking and calcining to obtain a clinker. And finally the clinker undergoes depolymerization and breaking. By the adoption of the preparation method, the calcined kaolin with its oil absorption being greater than 100ml/100g can be obtained by proportioning fine raw ore, optimizing, depolymerizing and breaking the raw material, controlling loose unit weight of the raw material, controlling the broken particle size distribution of the raw material, controlling the calcining condition, controlling loose unit weight of the clinker, controlling the particle size distribution of the clinker and the like. There is no need to add a medicament during the preparation process. The product residue on sieve will not exceed standard. The product obtained has no corrosion, has low viscosity, and is easy to disperse in a solution.

Description

technical field [0001] The invention relates to a method for preparing kaolin, in particular to a method for preparing calcined kaolin with high oil absorption. Background technique [0002] As an industrial mineral with excellent performance, kaolin is widely used in dozens of industries such as papermaking, paint, ceramics, rubber, chemical industry, medicine, and national defense. In recent years, the beneficiation process of kaolin has been continuously improved, its application value has been further developed, and its application fields have become more extensive. In high-tech fields such as atomic reactors, space shuttles and spacecraft, kaolin, as a new material, has become an indispensable raw material for high-temperature resistant porcelain components. However, different application areas have different requirements for kaolin oil absorption. In the papermaking industry, kaolin is mainly used in two fields, one is the filler used in the papermaking (or called pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 于全刘学军金宝文赵育华董雁国
Owner 唐山麦迪逊高岭土股份有限公司
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