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Preparation method of calcium sulfate whisker

A technology of calcium sulfate whiskers and fibrous gypsum, applied in chemical instruments and methods, calcium/strontium/barium sulfate, single crystal growth, etc. Filling materials, unstable quality of calcium sulfate whiskers, etc., to achieve the effect of low cost of raw materials, good quality stability, and low production cost

Active Publication Date: 2015-02-04
JIANGXI FENGZHU NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing methods for preparing calcium sulfate whiskers mainly include two categories: one is to produce directly by grinding gypsum mineral raw materials. The production of calcium sulfate whiskers by this method is simple and direct, and the cost is not high, but the quality of the produced calcium sulfate whiskers is not high. Stable, with too much waste, the quality is difficult to meet the requirements of high-end filling materials, and can only be used in low-end materials; the other is produced by chemical synthesis. The calcium sulfate whiskers produced by this method have good stability and high quality. It can meet the requirements of high-end filling materials, but the production cost is relatively high. In addition, because it is produced by chemical synthesis, more waste, waste liquid and waste gas will be generated during the production process, which will have a greater adverse impact on the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Select 1 ton of fiber gypsum raw ore, the main component of which is CaSO dihydrate with a purity ≥ 99.0% 4 , the lines of fiber gypsum raw materials need to be clear and straight, without too many bends and intermediate knots. Among the selected fiber gypsum raw materials, the proportion of fiber gypsum raw materials with clear and straight lines is > 80%, and the single block of fiber gypsum raw materials has impurities < 1 %, there is no sludge on the surface, and the fibrous gypsum raw material is initially crushed to form fibrous gypsum small pieces with a particle size of 5 to 15 cm;

[0036] (2) Put the fibrous gypsum pieces into a soaking pool for 14 hours and soak for 14 hours. When soaking, the liquid surface covers all the fibrous gypsum pieces. Divided into A: acetic acid (food grade), B: glycerin (pharmaceutical grade), C: penetrant JFC, D: calcium lignosulfonate, E: water, the mass ratio of each component is A:B:C:D :E=10:5:1:1:90;

[0037] (3) Put t...

Embodiment 2

[0042] (1) Select 2 tons of fiber gypsum raw ore, the main component of which is CaSO dihydrate with a purity ≥ 99.0% 4 , the lines of fiber gypsum raw materials need to be clear and straight, without too many bends and intermediate knots. Among the selected fiber gypsum raw materials, the proportion of fiber gypsum raw materials with clear and straight lines is > 80%, and the single block of fiber gypsum raw materials has impurities < 1 %, there is no sludge on the surface, and the fibrous gypsum raw material is initially crushed to form fibrous gypsum small pieces with a particle size of 5 to 15 cm;

[0043] (2) Put the fibrous gypsum pieces into the immersion tank for 8 hours, and at the same time, heat the immersion tank with a steam boiler at a temperature of 50-80°C. When soaking, the liquid surface covers all the fibrous gypsum pieces. block, the soaking tank is equipped with soaking potion, the components of the soaking potion are A: acetic acid (food grade), B: glycer...

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Abstract

The invention relates to a preparation method of whisker, and particularly relates to a preparation method of calcium sulfate whisker. The preparation method of the calcium sulfate whisker comprises the following steps of (1) selecting a fiber gypsum raw material, carrying out primary crush on the fiber gypsum raw material to form fiber gypsum pieces with particle size of 5-15 cm; (2) immersing the fiber gypsum pieces in an immersion tank, wherein the immersion tank is filled with an immersion solution; (3) steam-curing the immersed fiber gypsum pieces in a steam-curing furnace, so that the fiber gypsum pieces become semi-hydrated gypsum; (4) carrying out primary crush on the semi-hydrated gypsum by using a roller machine so as to make the semi-hydrated gypsum present strip flocculent shapes, then grinding the strip flocculent shaped semi-hydrated gypsum by using a pulverizer to obtain fibrous gypsum; and (5) drying the fibrous gypsum through a drier, cooling and homogenizing to obtain an anhydrous calcium sulfate whisker product. The calcium sulfate whisker product produced by the preparation method has good quality stability, low cost and small influence on environment.

Description

technical field [0001] The invention relates to a method for preparing whiskers, in particular to a method for preparing calcium sulfate whiskers. Background technique [0002] Calcium sulfate whisker, alias: gypsum whisker, is a fibrous (whisker-like) single crystal with uniform cross-section, complete shape, and perfect internal structure, which is grown in the form of a single crystal with gypsum as the raw material. . It has many excellent properties such as high strength, high modulus, high toughness, high insulation, wear resistance, high temperature resistance, acid and alkali resistance, corrosion resistance, good infrared reflectivity, easy surface treatment, easy compounding with polymers, and non-toxic. Physical and chemical properties. [0003] Calcium sulfate whiskers combine the advantages of reinforcing fibers and ultrafine inorganic fillers, and can be used as reinforcing and toughening agents or functional fillers in resins, plastics, rubber, coatings, pai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/10C30B29/22C30B29/62C01F11/46
Inventor 罗新峰黄意漆鸿飞
Owner JIANGXI FENGZHU NEW MATERIAL TECH
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