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High-whiteness wollastonite powder and preparation method thereof

A technology of wollastonite powder and high whiteness, which is applied in silicate, alkaline earth metal silicate, grain treatment, etc., and can solve the problems of affecting the whiteness of wollastonite firing, limited application of ceramic products, and extremely high requirements. , to achieve the effect of eliminating secondary iron pollution, better energy saving effect and good stability

Inactive Publication Date: 2019-12-20
广东五岭硅灰石有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] High-end ceramics, daily-use ceramics, ceramic glazes, etc. have put forward higher requirements for the whiteness of raw materials. Since natural wollastonite is often accompanied by colored impurities such as garnet and Fushan stone and its own multiple crystal forms, it seriously affects the whiteness of raw materials. The firing whiteness of wollastonite is limited, which limits the application of wollastonite in ceramic products with high whiteness requirements
Although researchers in the field of wollastonite products have taken various measures to improve the whiteness of wollastonite, high-whiteness wollastonite powder is still rare, and the existing products have extremely high requirements for raw materials, and the market is in short supply. , it is of great significance to develop wollastonite powder with high whiteness and its preparation method

Method used

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  • High-whiteness wollastonite powder and preparation method thereof
  • High-whiteness wollastonite powder and preparation method thereof
  • High-whiteness wollastonite powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of high whiteness wollastonite powder, comprising the following steps:

[0031] (1) Select marble-type wollastonite ore and crush it into 30mm fragments, and obtain 5-30mm oversize after sieving, wash and dry the oversize, and manually remove calcite, black gangue and sawdust Obtain wollastonite coarse concentrate;

[0032] (2) Selecting 9 parts by weight of quartz and 1 part by weight of dolomite with a clean surface of 5 to 30 mm in particle size and mixing with 90 parts by weight of wollastonite coarse concentrate in step (1) to form a mixture;

[0033] (3) the mixture in step (2) is dropped into Raymond mill dry grinding to 100 orders to obtain sand;

[0034] (4) in step (3), the under-sieve material after the 40 mesh vibrating sieve screening is put into a dry type weak magnetic separator, and the non-magnetic matter of the gained is put into a dry type strong magnetic separator again, get fine sand;

[0035] (5) Put the fine sand in step (4...

Embodiment 2

[0037] A preparation method of high whiteness wollastonite powder, comprising the following steps:

[0038] (1) Select marble-type wollastonite ore and crush it into 20mm fragments, and obtain 5-20mm oversize after sieving. After washing with water, dry the oversize, manually remove calcite and sawdust, and then put it into color separation machine, color sorting removes blue calcite and other dark gangue to obtain wollastonite coarse concentrate;

[0039] (2) choosing particle diameter is that 7 parts by weight of quartz, 5 parts by weight of feldspar, 1 part by weight of dolomite and 88 parts by weight of wollastonite coarse concentrate in the step (1) are mixed evenly with the surface cleanness of 5~20mm, form a mixture;

[0040] (3) Watering the mixture in step (2) to a concentration of 70% is dropped into a ball mill for wet grinding to 60 orders to obtain sand;

[0041] (4) In step (3), the under-sieve material after the 40 mesh vibrating sieve screening with the sand ...

Embodiment 3

[0044] A preparation method of high whiteness wollastonite powder, comprising the following steps:

[0045] (1) Select marble-type wollastonite ore and crush it into 25mm fragments, and obtain 10-25mm oversize after sieving, wash and dry the oversize, and manually remove calcite, black slate and sawdust Obtain wollastonite coarse concentrate;

[0046] (2) Selecting 1 part by weight of dolomite with a clean surface of 10 to 20 mm in particle size and mixing with 99 parts by weight of wollastonite coarse concentrate in step (1) to form a mixture;

[0047] (3) The mixture in the step (2) is dropped into a ball mill for dry grinding to 80 orders to obtain sand;

[0048] (4) After distributing the sand material in step (3) to a concentration of 40%, put the undersize after 40-mesh vibrating sieve screening into a wet-type weak magnetic separator, and then put the non-magnetic material into another set Wet strong magnetic separator to obtain fine sand ore pulp;

[0049] (5) Put t...

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Abstract

The invention belongs to the technical field of non-metallic mineral processing, and particularly relates to high-whiteness wollastonite powder and a preparation method thereof. The preparation methodcomprises the following steps: selecting marble type wollastonite, crushing and sorting to obtain rough concentrate, mixing the rough concentrate with auxiliary mineral raw materials to obtain a mixture, grinding the mixture into sand, removing iron, and grinding the sand into a powder. Auxiliary materials are added to control powder components, so that the high-whiteness wollastonite powder is prepared; iron is deeply removed in the preparation process, and secondary processing pollution is avoided, the stability of the whiteness of the powder is ensured, and reasonable-stage grinding is beneficial to energy conservation and consumption reduction.

Description

technical field [0001] The invention belongs to the technical field of non-metallic mineral processing, and in particular relates to a high-whiteness wollastonite powder and a preparation method thereof. Background technique [0002] Wollastonite is a single-chain silicate mineral, usually in the form of acicular, flaky, radial or fibrous aggregates, with good dielectric properties, high whiteness, high heat resistance and weather resistance, Widely used in ceramics, metallurgy, papermaking, plastics, coatings and other fields. Especially in the ceramic industry, wollastonite is an ideal raw material, which can greatly reduce its firing temperature, shorten the firing time, and realize low-temperature and fast firing at one time. It can not only save a lot of fuel to reduce product cost, but also improve the mechanical properties of the product, reduce the cracks and warpage of the product, increase the gloss of the glaze, improve the strength of the embryo body, and then i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/24C04B35/22C04B35/626B02C21/00B02C23/14
CPCB02C21/00B02C23/14C01B33/24C04B35/22C04B35/62605C04B35/6261C04B2235/321C04B2235/3418C04B2235/3463
Inventor 郑锐郑钦何东祥唐显韬胡勇
Owner 广东五岭硅灰石有限公司
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