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A kind of high-efficiency magnesium hydroxide flame retardant wet preparation method

A technology of magnesium hydroxide and flame retardant, applied in the directions of magnesium hydroxide, chemical instruments and methods, magnesium compounds, etc., can solve problems such as difficulty in obtaining raw materials, easy environmental pollution, complex chemical production process, etc. Utilization rate, coherent process flow, and the effect of improving beneficiation efficiency

Active Publication Date: 2018-10-26
HEFEI ZHONGKE FLAME RETARDANT NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many methods for preparing magnesium hydroxide flame retardant, mainly physical method and chemical method. The physical method is obtained through physical deep processing of the natural mineral brucite, and the chemical method mainly uses chemical synthesis. That is, by using the reaction of raw materials such as brine and brine containing magnesium chloride and alkalis in aqueous media, most of the chemical methods have complicated production processes, raw materials are not easy to obtain, and are easy to pollute the environment. It is unacceptable from the perspective of industrial application costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-efficiency magnesium hydroxide flame retardant wet preparation method, the process is to use brucite as a raw material for wet preparation of magnesium hydroxide flame retardant, comprising the following steps:

[0028] A. The brucite raw ore is directly crushed into brucite gravel with a diameter of 5 cm by a crusher;

[0029] B. put the brucite gravel prepared in step A into the overflow ball mill, and pass into clear water, and the ball mill will crush the brucite through the cooperation of its internal cast steel balls and corrugated lining plates under the water environment. The stone is subjected to a series of impact, shearing and crushing to obtain a brucite slurry containing coarse sand;

[0030] C. the brucite slurry containing the coarse sand obtained in the step B is passed through the spiral desander, and the flaky suspendability of the brucite ore particles is used to remove the contained coarse sand;

[0031] D. The brucite slurry removed from the...

Embodiment 2

[0037] A high-efficiency magnesium hydroxide flame retardant wet preparation method, the process is to use brucite as a raw material for wet preparation of magnesium hydroxide flame retardant, comprising the following steps:

[0038] A. The brucite raw ore is directly crushed into brucite gravel with a diameter of 7.5cm by a crusher;

[0039] B. put the brucite gravel prepared in step A into the overflow ball mill, and pass into clear water, and the ball mill will crush the brucite through the cooperation of its internal cast steel balls and corrugated lining plates under the water environment. The stone is subjected to a series of impact, shearing and crushing to obtain a brucite slurry containing coarse sand;

[0040] C. the brucite slurry containing the coarse sand obtained in the step B is passed through the spiral desander, and the flaky suspendability of the brucite ore particles is used to remove the contained coarse sand;

[0041] D. The brucite slurry removed from th...

Embodiment 3

[0047] A high-efficiency magnesium hydroxide flame retardant wet preparation method, the process is to use brucite as a raw material for wet preparation of magnesium hydroxide flame retardant, comprising the following steps:

[0048] A. The brucite raw ore is directly crushed into brucite gravel with a diameter of 10cm by a crusher;

[0049] B. put the brucite gravel prepared in step A into the overflow ball mill, and pass into clear water, and the ball mill will crush the brucite through the cooperation of its internal cast steel balls and corrugated lining plates under the water environment. The stone is subjected to a series of impact, shearing and crushing to obtain a brucite slurry containing coarse sand;

[0050] C. the brucite slurry containing the coarse sand obtained in the step B is passed through the spiral desander, and the flaky suspendability of the brucite ore particles is used to remove the contained coarse sand;

[0051] D. The brucite slurry removed from the...

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Abstract

The invention discloses an efficient magnesium hydroxide flame retardant wet-process preparation method, and relates to the technical field of wet-process mineral separation. According to the preparation method, wet purification is performed on low-grade brucite to prepare a magnesium hydroxide flame retardant, and particularly comprises the following steps: crushing brucite raw ore into gravels; putting the gravels into an overflow type ball grinder for wet ore grinding to prepare brucite slurry; performing sand removal and purification on the brucite slurry through a spiral sand remover and a hydrocyclone; removing ferric micro powder impurities, mixed during ball grinding, through a high-gradient magnetic separator, then adding a medicine for flotation classification for further purification; performing natural settling, water filtering, pressure filtering, drying and ultrafine smashing on the purified brucite slurry to prepare the magnesium hydroxide flame retardant with different particle sizes. By the adoption of a wet-process mineral separation process, the low-grade brucite can be purified, and the resource utilization rate of the brucite ore is greatly increased; meanwhile, the whole mineral separation process is completed by reasonably adopting large-sized treatment machinery, so that the mineral separation efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of wet mineral processing, in particular to a wet method for preparing a high-efficiency magnesium hydroxide flame retardant. Background technique [0002] There are many methods for preparing magnesium hydroxide flame retardant, mainly physical method and chemical method. The physical method is obtained through physical deep processing of the natural mineral brucite, and the chemical method mainly uses chemical synthesis. That is, by using the reaction of raw materials such as brine and brine containing magnesium chloride and alkalis in aqueous media, most of the chemical methods have complicated production processes, raw materials are not easy to obtain, and are easy to pollute the environment, which is unacceptable from the perspective of industrial application costs. [0003] We all know that the physical preparation of magnesium hydroxide flame retardants using brucite minerals depends to a large extent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/14B02C21/00B03D1/002C09K21/02
CPCB02C21/00B03D1/002B03D2201/005B03D2201/007B03D2203/04C01F5/145C09K21/02
Inventor 王立贵朱军
Owner HEFEI ZHONGKE FLAME RETARDANT NEW MATERIAL
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