Preparation method of a-quartz type free silicon dioxide exhaled dust
A silica and quartz technology, applied in the field of ore processing, can solve the problems of difficult acquisition and high price, and achieve the effects of environmental friendliness, stable quality and easy operation.
Active Publication Date: 2022-07-29
云南省地质矿产勘查开发局中心实验室 +1
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Problems solved by technology
[0004] The invention provides a method for preparing a-quartz free silica fume, which can solve the problems of high price and difficult acquisition of existing free silica fume standard materials
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[0042] The present invention will be described in detail below with reference to the examples, but the present invention is not limited to these examples.
[0043] The embodiment of the present invention provides a preparation method of a-quartz type free silica exhaled dust, such as figure 1 As shown, the preparation method includes:
[0044] S1, pulverizing natural a-quartz ore to obtain quartz particles.
[0045] Specifically include:
[0046] S11. Coarsely crush the natural a-quartz ore to obtain quartz particles of 30-50 mm.
[0047] In practical applications, SiO is selected 2 The natural a-quartz ore with a content of more than 98% is used as the raw material, and a jaw crusher is used to crush it to about 40mm.
[0048] S12, mediumly crushing the quartz particles obtained in S11 to obtain 10-30 mesh quartz particles.
[0049] For the quartz particles obtained in S11, a roller crusher can be used to crush them to about 20 mesh.
[0050] S13, finely crushing the qu...
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Abstract
The invention discloses a preparation method of alpha-quartz type free silicon dioxide expiratory dust, belongs to the technical field of ore processing, and can solve the problems that an existing free silicon dioxide expiratory dust standard substance is high in price and relatively high in acquisition difficulty. The preparation method comprises the following steps: S1, crushing natural a-quartz ore to obtain quartz particles; s2, performing impurity removal treatment on the quartz particles obtained in the step S1, and drying the quartz particles subjected to impurity removal; s3, grinding the quartz particles obtained in S2 to obtain quartz powder; s4, performing still water settling separation on the quartz powder to obtain a settled substance; and S5, carrying out centrifugal separation on the settled substance, and drying to obtain the free silicon dioxide expiratory dust. The method is used for preparing the free silicon dioxide expiratory dust.
Description
technical field [0001] The invention relates to a preparation method of a-quartz type free silica exhaled dust, and belongs to the technical field of ore processing. Background technique [0002] Respirable dust refers to dust with an aerodynamic diameter of less than 5 microns. A large number of medical studies have shown that there are only dust particles below 5 microns in the human lungs, most of which are between 0.2 and 2 microns. The particle size range of exhaled dust can be seen. Mainly below 5 microns. Respiratory dust containing free silica is a substance that causes pneumoconiosis. Therefore, when conducting pathological research and drug development, a certain specification of free silica exhaled dust is required for experiments. [0003] In the detection process of free silica breath dust, it is necessary to use standard materials for quality control. However, at present, the standard material of free silica breath dust is only available in the United States,...
Claims
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IPC IPC(8): G01N1/28G01N1/34B03C1/30B02C23/08B02C21/00
CPCG01N1/286G01N1/34B02C21/00B02C23/08B03C1/30G01N2001/2893G01N2001/2866
Inventor 乐智广杨立新李刚杨社平张淼刘晓红
Owner 云南省地质矿产勘查开发局中心实验室