Preparation process for preparing kaolin with high brightness by using coal gangues
A preparation process, kaolin technology, applied in the direction of aluminum silicate, silicate, etc., can solve the problems of not achieving the ideal effect, affecting the practical application, environmental pollution, etc., and achieve the effect of low cost, small investment and good effect
Active Publication Date: 2014-12-17
HAIMEN CANGYUN MACHINERY CO LTD
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Problems solved by technology
Such as high-gradient magnetic separation, flotation, selective flocculation, sodium dithionite chemical bleaching, etc., but these methods cannot achieve the desired effect, and the cost is high, and it will cause environmental pollution, which affects the actual application.
Method used
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Embodiment 1
[0038] First of all, the raw material coal gangue ore has been analyzed for components and XRD for many times, and the results are as follows:
[0039]
[0040] According to the above phase analysis, the following preparation process of high whiteness kaolin is determined:
[0041] A preparation process for preparing high-whiteness kaolin from coal gangue, comprising the following steps:
[0042] A, crushing, crushing raw ore coal gangue, the crushed particle size is 0.1mm ~ 2mm;
[0043] B, jigging, using an asymmetric sine wave jig to carry out jigging operations on the crushed coal gangue in step A, to separate coarse pyrite, and the iron removal rate is 63%; Most of the pyrite has been removed after two re-elections.
[0044] C, grinding, and then grinding the remaining ore particles in step B to 0.047mm~0.1mm;
[0045] D, particle selection, the ore particles in the step C are pumped into the spiral chute for re-election, and the fine-grained pyrite is separated;
...
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Abstract
The invention discloses a preparation process for preparing kaolin with high brightness by using coal gangues. The preparation process of the kaolin with high brightness comprises the following steps: crushing; performing jigging; grinding; granulating; oxidizing; carrying out magnetic separation; filtering; dehydrating; drying; and calcining. By adopting the technical scheme, the preparation method disclosed by the invention has the greatest advantage of getting rid of adverse factors such as great investment, poor product quality, great fluctuation, high production cost, inconvenience in operation and the like in the conventional production process and achieves the production process which is less in investment, low in cost, stable in quality, convenient to operate and green and environmentally friendly. Coal gangues can be efficiently utilized by virtue of the preparation process. The iron and titanium removal effect is good and the product is qualified. As the electrolyte is recycled and not discharged, the preparation process is free from environmental pollution problems.
Description
technical field [0001] The invention relates to the field of preparation technology, in particular to a technology for preparing high-whiteness kaolin from coal gangue. Background technique [0002] There are many large state-owned coal mines densely distributed in central and southern Hebei. While producing high-quality coal, these coal mines also produce tens of thousands of tons of coal gangue every day. These coal gangues are piled up into mountains and occupy a large amount of cultivated land. , and the sulfur in gangue will spontaneously ignite, producing a large amount of harmful gas, and can also pollute groundwater resources through oxidation. [0003] Now someone uses coal gangue to produce internal combustion bricks, but its added value is very low. Through chemical analysis of coal gangue, it is found that most of them are mainly kaolin, which is called coal series kaolinite chemically, which can account for 70% of the weight of coal gangue, or even higher. Kaol...
Claims
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IPC IPC(8): C01B33/26
Inventor 段清印
Owner HAIMEN CANGYUN MACHINERY CO LTD