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Process for removing free quartz from coal series kaolin

A coal-based kaolin and free quartz technology, which is applied in the field of coal-based kaolin free quartz removal technology, can solve the problems of high resource consumption, ineffective removal, and low quartz removal rate, and achieve the effects of improving utilization efficiency and reducing environmental protection and safety risks

Active Publication Date: 2021-11-30
山西金宇科林科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, to provide a process for removing free quartz from coal-measure kaolin, which solves the problem of the traditional method of removing quartz from coal-measure kaolin, which is mainly for the separation of minerals with a free quartz content exceeding 20%. The medium rejection rate is low, the resource consumption is large, and technical problems such as inability to effectively remove

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  • Process for removing free quartz from coal series kaolin

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] A coal series kaolin free quartz removal process, wherein: comprising the following steps:

[0031] (1) One-time elimination: the coal-measure kaolinite ore is crushed three times in turn to a fineness of 1mm, and the ratio of raw material fineness after three crushings is 300:30:1, and then the crushed ore The powder is sieved through a 20-mesh sieve to obtain primary crushed raw materials;

[0032] (2) Secondary removal: The primary crushed raw materials obtained in step (1) are ground through grinding equipment to obtain coal-based kaolin powder. The grinding fineness is controlled at 200-300 mesh, and the powder below 200 mesh is passed The slag outlet of the grinding equipment is discharged; the separated effective coal-measure kaolin powder free quartz is passed through the X-ray diffractometer, and the experimental measurement is 7.8%.

[0033] (3) Three times of elimination: mix the 200-300 mesh coal series kaolin slag obtained in step (2), water and dispersant...

Embodiment 2

[0043] A coal series kaolin free quartz removal process, wherein: comprising the following steps:

[0044] (1) One-time elimination: the coal-measure kaolinite ore is crushed three times in sequence to a fineness of 1mm, and the ratio of raw material fineness after three crushings is 400:40:2, and then the crushed ore The powder is sieved through a 20-mesh sieve to obtain primary crushed raw materials;

[0045] (2) Secondary removal: The primary crushed raw materials obtained in step (1) are ground through grinding equipment to obtain coal-based kaolin powder. The grinding fineness is controlled at 200-300 mesh, and the powder below 200 mesh is passed The slag outlet of the grinding equipment is discharged; the separated effective coal-measure kaolin powder free quartz is passed through the X-ray diffractometer, and the experimental measurement is 7.2%.

[0046] (3) Three times of elimination: the 200-300 mesh coal series kaolin powder, water and dispersant obtained in step (...

Embodiment 3

[0056] A coal series kaolin free quartz removal process, wherein: comprising the following steps:

[0057] (1) One-time elimination: the coal-measure kaolinite ore is crushed three times in sequence to a fineness of 1mm, and the ratio of raw material fineness after three crushings is 500:50:3, and then the crushed ore The powder is sieved through a 20-mesh sieve to obtain primary crushed raw materials;

[0058] (2) Secondary removal: The primary crushed raw materials obtained in step (1) are ground through grinding equipment to obtain coal-based kaolin powder. The grinding fineness is controlled at 200-300 mesh, and the powder below 200 mesh is passed Discharged from the slag outlet of the grinding equipment; the separated effective coal-measure kaolin powder free quartz was determined to be 6.9% by X-ray diffractometer.

[0059] (3) Three times of elimination: mix the 200-300 mesh coal series kaolin powder, water and dispersant obtained in step (2) to obtain a slurry with a ...

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Abstract

The invention relates to a process for removing free quartz from coal series kaolin, belongs to the technical field of coal series kaolin, and solves the technical problems of low removal rate, high resource consumption, incapability of effectively removing quartz and the like in a traditional quartz removal method for sorting minerals with the free quartz content exceeding 20% or more in coal series kaolin. According to the solution, the process for removing the free quartz from the coal series kaolin comprises the steps: removing for the first time; removing for the second time; removing for the third time; removing for the fourth time; removing for the fifth time; and packaging finished products. According to the process, raw material crushing equipment, screening requirements, mineral separation fineness, hydrocyclone reselection conditions, flotation parameters, reagent addition, the sequence of wet grinding, the grading process and the like and control requirements are strictly controlled, the content of impurities such as free quartz SiO2 in the raw materials is reduced favourably under the condition that product components are not changed, the quartz content of the prepared high-purity coal series kaolin product is reduced to 1%-5% and is 10%-50% of the quartz content of existing coal series kaolin.

Description

technical field [0001] The invention belongs to the technical field of coal series kaolin, and in particular relates to a process for removing free quartz from coal series kaolin. Background technique [0002] There are abundant coal-measure kaolin resources in northern my country. As a new type of non-metallic mineral functional material, its application fields continue to expand, and it plays an important role in the fields of coatings, papermaking, ceramics, rubber and plastics, and chemicals. However, due to the coal-measure kaolin associated with coal, after long-term geological evolution, the coal-measure kaolin is hard and closely embedded with vein minerals, and impurities are difficult to separate. Except for the extremely high-purity coal-measure kaolin, the quartz mass fraction is low. , without considering the removal of quartz, most coal-measure kaolin co-associates a large amount of quartz, and the embedded particle size is very fine. The existence of free qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
CPCC01B33/40Y02P40/60
Inventor 贾国兴李昀霞邢海明张涛罗维茂罗训樵罗一
Owner 山西金宇科林科技有限公司
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