Application, Production Process and Market Prospect of Calcium Sulfate Whisker

1. What is calcium sulfate whisker Calcium sulfate whisker (gypsum whisker) is a fibrous single crystal of calcium sulfate, which can be divided into three types: anhydrous calcium sulfate (CaSO 4) whisker, hemihydrate calcium sulfate (CaSO 4 0.5H 2O) whisker and dihydrate calcium sulfate (CaSO 4 2H 2O) whisker.

2, the use of calcium sulfate whiskers (1) calcium sulfate whiskers as a reinforcing filler calcium sulfate whiskers can be used as plastics, rubber, polyurethane, metal and other reinforcing spices, such as adding calcium sulfate whiskers in plastics, can improve its mechanical strength, heat resistance and dimensional stability. (2) Calcium sulfate whiskers as friction materials Calcium sulfate whiskers can replace asbestos as a new friction material, which can improve the wear resistance, friction stability and service life of friction materials. (3) calcium sulfate whisker as asphalt modified material calcium sulfate whisker as asphalt filler and reinforcing agent, good compatibility with asphalt, high interface binding force, can improve the softening temperature of asphalt, penetration, reduce its extensibility. (4) calcium sulfate whiskers as a filter material calcium sulfate whiskers than the surface area, loose density is small, high fluffy, non-toxic pollution, can be used for waste gas and wastewater filtration and purification materials, and even beverages, drugs, etc. as a filter material. (5) calcium sulfate whisker as paint and paint filler calcium sulfate whisker as paint and paint filler, can effectively improve the paint and paint adhesion, high temperature resistance, insulation and dry crack resistance, but also to a certain extent to improve its whiteness. (6) calcium sulfate whisker as papermaking filler calcium sulfate whisker instead of part of the wood pulp papermaking, not only can improve the paper whiteness, strength, but also can reduce the consumption of natural plant fiber and pulping process wastewater emissions. (7) calcium sulfate whisker as structural adhesive filler calcium sulfate whisker for epoxy building structure adhesive, can improve its mechanical properties, improve the operation process, extend the storage period, convenient construction operation. 3, calcium sulfate whisker preparation method of calcium sulfate whisker raw materials include: natural gypsum, phosphogypsum, desulfurization gypsum, carbide slag, halogen slag, waste acid and brine, citric acid slag, etc., its preparation method is hydrothermal method, atmospheric acidification method, microemulsion method, ion exchange method, etc.

4, Annual output of 10000 tons of calcium sulfate whisker production process

Production of calcium sulfate whisker (10000 tons/year) by calcium chloride and sulfuric acid in a company in Sichuan

Calcium sulfate whisker product performance index

5, calcium sulfate whisker market prospects China's natural gypsum resources are very rich, calcium sulfate whiskers to natural gypsum as raw materials, resources, low cost, but also for the depth of gypsum processing provides a new way. Driven by the policy of developing circular economy and energy saving and emission reduction, the deep processing industry of industrial by-product gypsum such as desulfurization gypsum and phosphogypsum will inevitably develop at an overspeed. The production of calcium sulfate whiskers from industrial by-product gypsum is a way to turn waste into treasure by producing high value-added products from industrial waste. The development and application of calcium sulfate whisker abroad has been involved in the fields of electronics, instrumentation, machinery, etc. In the future, calcium sulfate whisker will replace the existing whisker products and be used in papermaking, engineering plastics, rubber and other industries. According to the addition amount of 5-30% of the base material, its annual demand is about 10-300000 tons; if the coatings, building materials, automobiles, electronics and other industries continue to develop, the annual demand is expected to exceed 600000 tons, the output value can exceed one billion yuan; the introduction of calcium sulfate whiskers can reduce the production cost of various industries and effectively increase their profit margins. 6, calcium sulfate whisker related production enterprises Sichuan Wanrun non-metallic mineral materials Co., Ltd. (annual output of 30000 tons of calcium sulfate whisker production capacity). Jiangxi Fengzhu New Material Technology Co., Ltd. (annual output of 5000 tons of calcium sulfate whisker production base, plans to build an annual output of 100000 tons of calcium sulfate whisker line). Ningyuan Longxiang New Material Technology Co., Ltd. (annual output of 20000 tons of anhydrous calcium sulfate whisker production capacity).