Method for separating silicon dioxide in wollastonite raw ore

A silica and separation method technology, applied in the direction of silica, silica, etc., can solve the problems of poor silica extraction effect, great difference in wollastonite composition, and restrictions on the application of silica, and achieve Increased specific surface area, improved whiteness, and increased productivity

Inactive Publication Date: 2016-10-26
望江县金峰矿产品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the formation process of wollastonite, Ca in it is sometimes partially replaced by Fe, Mn, Ti, Sr ions to form isomorphs, mixed with a small amount of Al and traces of K, Na, and wollastonite The temperature, pressure and other conditions during formation are different, resulting in great differences in the composition of wollastonite in different regions. In the existing technology, the extraction effect of using wollastonite ore to extract silica is not very good, and the extraction rate is not good. The shortcomings of high and poor purity limit the application of the obtained silica

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The separation method of silicon dioxide in a kind of wollastonite raw ore that the present invention proposes comprises the following steps:

[0022] S1, crush wollastonite raw ore, add water to prepare it, add it to the ball mill, add grinding aid and ball mill for 50 minutes, wherein the quality of grinding aid is 0.05wt% of the mass of wollastonite raw ore; after the ball milling, the magnetic separation intensity is 4500kA Magnetic separation is carried out in a magnetic separator of / m to obtain material A;

[0023] S2. Add water to material A to make a pulp with a concentration of 15wt%, adjust the pH value of the pulp to 10, add oxidized paraffin wax soap and stearic acid for flotation for 20 minutes, then wash and dry to obtain material B; wherein, every liter of pulp is added The quality of the oxidized paraffin wax soap is 2kg, and the quality of the stearic acid that every liter of pulp adds is 30g;

[0024] S3. After calcining the material B, add it to the...

Embodiment 2

[0028] The separation method of silicon dioxide in a kind of wollastonite raw ore that the present invention proposes comprises the following steps:

[0029] S1, crush wollastonite raw ore, add water to prepare it, add it to the ball mill, add grinding aid and ball mill for 20 minutes, wherein the quality of grinding aid is 0.1wt% of the mass of wollastonite raw ore; after the ball milling, the magnetic separation intensity is 3000kA Magnetic separation is carried out in a magnetic separator of / m to obtain material A;

[0030] S2, adding water to material A to make a pulp with a concentration of 25wt%, adjusting the pH value of the pulp to 8, adding oxidized paraffin wax soap and stearic acid for flotation for 45 minutes, then washing and drying to obtain material B; wherein, every liter of pulp was added The quality of the oxidized paraffin wax soap is 1kg, and the quality of the stearic acid that every liter of pulp adds is 50g;

[0031] S3. After calcining the material B,...

Embodiment 3

[0035] The separation method of silicon dioxide in a kind of wollastonite raw ore that the present invention proposes comprises the following steps:

[0036] S1. Crushing wollastonite raw ore to a particle size of ≤0.5mm, adding water to prepare a slurry with a mass fraction of 15wt%, then adding it to a ball mill, and adding isoamyl alcohol for ball milling for 25 minutes, wherein the mass of isoamyl alcohol is the original wollastonite 0.06wt% of the ore mass; after ball milling, magnetic separation is carried out in a magnetic separator with a magnetic separation intensity of 3800kA / m to obtain material A; in the process of magnetic separation, the ore concentration is 30wt%, and the rotating speed is 180r / min;

[0037] S2. Add water to material A to prepare a pulp with a concentration of 18wt%, adjust the pH value of the pulp to 9, add oxidized paraffin wax soap and stearic acid for flotation for 28 minutes, then wash and dry to obtain material B; wherein, every liter of pu...

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PUM

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Abstract

The invention discloses a method for separating silicon dioxide in wollastonite raw ore. The method comprises the steps that the wollastonite raw ore is subjected to smashing, ball milling and magnetic separation to obtain a material A; water is added into the material A, the pH is adjusted, oxidized paraffinum sodium salt and stearic acid are added for flotation, and a material B is obtained; the material B is added into an oxalic acid solution with the pH being 1-3 after being calcined, and filtering, washing and drying are carried out to obtain a material C; the material C is added into water, ammonium chloride is added, ammonium chloride is added after microwave heating, the pH is adjusted to range from 0.6 to 1.2, and sol is obtained; a surface active agent is added into the sol, the pH is adjusted to range from 3 to 4, hydrochloric acid is added, the pH is adjusted to range from 0.6 to 1.2, and a material D is obtained; the material D, sodium fluoride, sodium hydroxide, hydrochloric acid and nitrilotrimethylene triphosphonic acid are added into water for a hydrothermal reaction. According to the method for separating silicon dioxide in the wollastonite raw ore, the steps are simple, and obtained silicon dioxide is high in yield and purity, good in stability and capable of being applied to multiple fields.

Description

technical field [0001] The invention relates to the technical field of silica extraction, in particular to a method for separating silica from wollastonite raw ore. Background technique [0002] Wollastonite is a needle-like or fibrous mineral with high electrical resistance, low dielectric constant, low hygroscopicity, good dispersion, low viscosity, and large aspect ratio. Due to the above-mentioned excellent properties of wollastonite ore, it is widely used in Glaze ingredients in the ceramic industry, low dielectric ceramic raw materials, cast steel mold powder in the iron and steel industry, electric welding industry, paint, pigment industry, plastic rubber industry, glass industry and agriculture industry, building materials industry, national defense industry and other fields. [0003] The chemical formula of wollastonite is CaSiO 3 , the structural formula is Ca 3 [Si 3 o 9 ], theoretical chemical composition: CaO: 48.25%, SiO2: 51.75%, can be used as a source of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
CPCC01B33/12
Inventor 徐国友
Owner 望江县金峰矿产品科技有限公司
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