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Method for purifying aedelforsite by pure physical process

A technology of wollastonite and physical methods, which is applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of low impurity removal rate, difficult control of material particle size, and unachievable manpower, to achieve fine particle size, Reduce dust pollution and avoid low efficiency

Active Publication Date: 2013-05-22
HUBEI FENGJIASHAN WOLLASTONITE FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, only artificial hand selection is generally used to improve the grade of wollastonite, but the above purification method is difficult to control the particle size of the material, and the removal rate of impurities is not high; and the production efficiency is low, and it takes a lot of manpower to achieve industrialization.
There are also some manufacturers who use chemical purification, that is, flotation, to improve the taste of wollastonite. Although better products can be obtained, the production cost of chemical purification is relatively high, and at the same time, the pollution to the environment is relatively large.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In this embodiment, the wollastonite raw material is firstly pulverized into a material with a particle size of 30mm by a jaw crusher, and then pulverized by an impact mill to remove the pulverized residue. Add water to the pulverized material to obtain pulp A, the concentration of pulp A is 11wt%, and the particle size of the material in pulp A is D 50 Less than 200 mesh. The iron impurities in the pulp A were removed by magnetic separation to obtain the pulp B. In this example, the Hunan Yueyang Hercules DLS strong magnetic machine was used to remove iron. Adjust the concentration of the pulp B to 6wt%, and then use the fiberglass fine sand shaker to carry out the gravity classification of the pulp B. The inclination of the shaker bed is 6°. The distribution is 30:60:120. After grading by the shaker, the front-stage material, middle-stage material and rear-stage material are obtained. Adjust the concentration of the front section material to 7wt%, adjust the concen...

Embodiment 2

[0020] In this embodiment, the wollastonite raw material is firstly crushed into a material with a particle size of 30 mm by a jaw crusher, and then crushed by an impact mill to remove the crushed residue. Add water to the pulverized material to obtain pulp A, the concentration of pulp A is 15wt%, and the particle size of the material in pulp A is D 50 Less than 200 mesh. The iron impurities in the pulp A were removed by magnetic separation to obtain the pulp B. In this example, the Hunan Yueyang Hercules DLS strong magnetic machine was used to remove iron. Adjust the concentration of the pulp B to 12wt%, and then use the fiberglass fine sand shaker for the gravity classification of the pulp B. The inclination of the shaker bed is 10°. The distribution is 30:60:120. After grading by the shaker, the front-stage material, middle-stage material and rear-stage material are obtained. The concentration of the front section material and the middle section material is all adjusted ...

Embodiment 3

[0022] In this embodiment, the wollastonite raw material is firstly crushed into a material with a particle size of 30 mm by a jaw crusher, and then crushed by an impact mill to remove the crushed residue. Add water to the pulverized material to obtain pulp A, the concentration of pulp A is 19wt%, and the particle size of the material in pulp A is D 50 Less than 200 mesh. The iron impurities in the pulp A were removed by magnetic separation to obtain the pulp B. In this example, the Hunan Yueyang Hercules DLS strong magnetic machine was used to remove iron. Adjust the concentration of the pulp B to 18wt%, and then use the fiberglass fine sand shaker for the gravity classification of the pulp B. The inclination of the shaker bed is 14°. The distribution is 30:60:120. After grading by the shaker, the front-stage material, middle-stage material and rear-stage material are obtained. The concentration of the front section material and the middle section material is adjusted to 1...

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Abstract

The invention provides a method for purifying aedelforsite by a pure physical process. The method comprises the following steps of: firstly crushing aedelforsite raw material, and then adding water to get ore slurry A; removing iron impurities in the ore slurry A by adopting a magnetic separation process to get ore slurry B; then performing gravity classification on the ore slurry B through a shaking table, and getting a front-section material, a middle-section material and a back-section material after classification; performing wet type screening on the front-section material and the middle-section material by adopting a spin-vibrating screen, wherein a screen A of the spin-vibrating screen, which is used for the front-section material is of 300 meshes, a screen B of the spin-vibrating screen, which is used for the middle-section material is of 180 meshes, and residues on the screen A and the screen B are screened matters after the screening is completed; and finally performing dehydration and drying on the screened matters to get a high-purity aedelforsite product. In the product prepared by the method disclosed by the invention, the content of CaSiO3 is more than 96%, the content of Fe2O3 is less than 0.2% and the loss on ignition is less than 1.5%; and the production method disclosed by the invention has the advantages of simple operation process, high production efficiency and no environmental pollution.

Description

technical field [0001] The invention relates to a method for purifying wollastonite, in particular to a purely physical method for purifying wollastonite ore and reducing iron and impurities in wollastonite ore, which belongs to the field of non-metallic mineral processing. Background technique [0002] Wollastonite is a non-metallic mineral raw material with a wide range of applications. It has good acid resistance, alkali resistance and chemical corrosion resistance; the moisture absorption rate is less than 4wt%. Low oil absorption, low electrical conductivity, good insulation. Wollastonite is a typical metamorphic mineral, which is mainly produced in the contact zone between acidic rock and limestone, and is symbiotic with calcite and garnet. It is also found in deep metamorphic calcareous crystalline schist, volcanic ejecta and some alkaline rocks. Due to the existence of impurities such as iron-containing impurities, calcite, diopside, garnet, etc., the use value of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00
Inventor 王德强李珍王永贵郑锐
Owner HUBEI FENGJIASHAN WOLLASTONITE FIBER
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