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Method for preparing calcined kaolin with high oil absorption value by utilizing coal gangues

A technology for calcining kaolin and coal gangue, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem of low oil absorption of calcined kaolin, and achieve the goal of increasing added value, enhancing added value, and strengthening market competitiveness Effect

Active Publication Date: 2017-08-08
山西晋坤矿产品股份有限公司
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Problems solved by technology

[0009] The present invention provides a method for preparing calcined kaolin with high oil absorption value from coal gangue in order to solve the defects of low oil absorption of existing common calcined kaolin and existing methods for preparing kaolin with high oil absorption value

Method used

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Embodiment

[0022] A method for preparing calcined kaolin with high oil absorption value from coal gangue, comprising the steps of beneficiation, sieving, iron removal, crushing and pulverization, ultrafine grinding, calcination and cooling, breaking up and depolymerization, specifically including the following steps:

[0023] (1) Mineral dressing and sieving to remove iron: the ore stockyard raw material dressing, firstly, before crushing, the quartz impurities mixed in the coal gangue are removed by hand, and the impurity minerals with low oil absorption are removed, and then they are screened and iron removed. Remove the quartz-like impurities and iron entrained in the ore, and set the impurity discharge port on the grinding equipment in the various processes of beneficiation, sieving and iron removal;

[0024] (2) Crushing and crushing: choose ore with a Mohs hardness of 3-5, use a conventional hammer crusher to crush the ore to a particle size of ≤15mm, and then use a hurricane mill t...

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Abstract

The invention belongs to the technical field of coal gangue processing and provides a method for preparing calcined kaolin with high oil absorption value by utilizing coal gangues, aiming at solving the problem that the oil absorption quantity of existing common calcined kaolin is low and overcoming the defects in an existing method for preparing the calcined kaolin with the high oil absorption value. The method comprises the following steps: carrying out beneficiation, screening and iron removal, crushing and smashing, carrying out superfine grinding, calcining and cooling and scattering and disaggregating. An inorganic dispersant sodium hexametaphosphate is replaced with an organic dispersant sodium polyacrylate and sintering is correspondingly reduced in a calcining process of the kaolin. The requirements of customers of carbonless copy paper on a high oil absorption performance are met and the oil absorption quantity can reach 80g / 100g; furthermore, the additional value of the waste coal gangues is improved so that the utilization of the waste resource coal gangues reaches a new stage. The product has relatively high market competitiveness; on one hand, the requirements of the customers of the carbonless copy paper, heat-sensitive paper and the like are met; the calcined kaolin has the outstanding oil absorption performance so that the additional value of the waste resource coal gangues is greatly improved and the waste resource coal gangues are really changed into valuable things.

Description

technical field [0001] The invention belongs to the technical field of coal gangue treatment, in particular to a method for preparing calcined kaolin with high oil absorption value from coal gangue. Background technique [0002] Coal gangue is a kind of coal-based kaolin. Its characteristic is that the raw ore is dark brown, and its whiteness is high after calcination. Refractory materials and other fields. Different processing techniques can endow products with different application functions. [0003] Certain specialty papers such as carbonless copy paper require high oil absorption kaolin to meet their specific uses. Due to its own fineness and processing constraints, the oil absorption index of ordinary kaolin is usually difficult to meet the application requirements of special paper such as carbon-free copy paper. Increasing the oil absorption of kaolin can not only meet the needs of customers for special paper such as carbonless copy paper and thermal paper, but als...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40C01P2006/19C01P2006/65
Inventor 曹永新李亚军李文杰刘继文任向上贾旺高祥武春朱世海李江
Owner 山西晋坤矿产品股份有限公司
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