Method for preparing sodium fluorosilicate by utilizing quartz sand dust

A technology of sodium fluorosilicate and quartz sand is applied in the field of preparing sodium fluorosilicate, which can solve the problems of secondary pollution of dust, and achieve the effects of improving work efficiency, large specific surface area, and avoiding floating

Active Publication Date: 2018-04-06
XINYI JINGRUN QUARTZ MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention prepares the recovered quartz sand dust into sodium fluorosilicate through a simple process, realizes the rational utilization of the quartz sand dust, and transforms the discarded quartz sand dust into useful Value-added products, while avoiding the secondary pollution of dust

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  • Method for preparing sodium fluorosilicate by utilizing quartz sand dust
  • Method for preparing sodium fluorosilicate by utilizing quartz sand dust

Examples

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Embodiment 1

[0021] The preparation process is as follows:

[0022] (1) The quartz sand dust is collected by the filter bag filter and collected in a cuboid dust collector; the bottom wall of the dust collector is coated with a composite compound consisting of 90wt% chitosan and 10wt% silica gel microspheres. layer, the dust collector includes a feeding pipeline and an internal stirring device, and the particle size of the silica gel microspheres is 2.5-5 μm;

[0023] (2) When floating quartz sand dust appears in the dust collector, inject acidic fluorine-containing wastewater into the dust collector through the feeding pipe, wherein the fluoride ion concentration is 1750-2000mg / L, and the pH is 2-3. And turn on the agitator to generate a solution of fluorine-containing silicic acid; when the amount of fluorine-containing wastewater injected reaches 1 / 5 of the volume of the dust collector, stop the injection and turn off the agitator;

[0024] (3) Inject the acetic acid suspension solutio...

Embodiment 2

[0028] The preparation process is as follows:

[0029] The cuboid dust collector used in step (1) in Example 1 was replaced with a cylindrical dust collector of the same volume, and the rest of the preparation method was the same as in Example 1.

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Abstract

The invention discloses a method for preparing sodium fluorosilicate by utilizing quartz sand dust. The method mainly comprises the steps of collecting the quartz sand dust, generating a solution containing fluosilicic acid, covering the solution with a composite film layer, and preparing the sodium fluorosilicate. According to the method disclosed by the invention, the bottom of a quartz sand dust collector is treated with chitosan and silica gel microspheres, the surface of the solution containing the fluosilicic acid is covered with the composite film layer, and the above measures all improve the adsorption capacity and adsorption efficiency of the quartz sand dust; and the method utilizes the quartz sand dust and fluorine-containing waste water to prepare the sodium fluorosilicate, themethod has simple operation, greenness and environmental protection, avoids the secondary pollution of the quartz sand dust, and obtains chemical products with high additional value.

Description

technical field [0001] The invention relates to the field of quartz sand dust recovery, in particular to a method for preparing sodium fluorosilicate by using quartz sand dust. Background technique [0002] Quartz sand is a hard, wear-resistant, chemically stable silicate mineral, the main chemical composition is SiO 2 , which plays an important role in traditional industries such as casting, metallurgy, rubber, abrasives, ceramics, construction, and high-tech fields such as aerospace, IT, communications, and solar cells. With the increase in demand for quartz sand with social development, there are There are many quartz sand processing and manufacturing enterprises. However, from the mining of quartz ore to the fine processing of quartz sand, quartz sand dust will appear in every step. It poses a huge threat to life and health. The content of free silica in quartz sand dust is 85-96%. Once inhaled, it will stay in the deep respiratory tract and alveolar area, leading to si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/10
CPCC01B33/103C01P2004/51C01P2004/60C01P2006/80
Inventor 沈德富沈长青
Owner XINYI JINGRUN QUARTZ MATERIAL
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