Diatomite is a kind of siliceous rock, mainly found in China, the United States, Denmark, France, the Soviet Union, Romania and other countries. Our diatomite reserves of 320 million tons, prospective reserves of more than one hundred million tons, mainly concentrated in east China and northeast China, the scale is larger, work do much more with jilin, zhejiang, yunnan, shandong, sichuan and other provinces, is widely distributed, but only focus on high quality soil jilin changbai region, most other deposit for 3 ~ 4 soil, due to the high content of impurities,Can not be directly deep processing utilization.
Diatomite is composed of amorphous SiO2 and contains a small amount of Fe2O3, CaO, MgO, Al2O3 and organic impurities.Diatomite is usually light yellow or light gray, soft, porous and light. It is commonly used in industry as insulation material, filter material, filler, grinding material, sodium silicate raw material, decolorizing agent and catalyst carrier.
The special porous structure of natural diatomite can be observed under the microscope. The microporous structure is the reason for the characteristic physical and chemical properties of diatomite.
The main component of diatomite as the carrier is SiO2[1].For example, the active component of industrial vanadium catalyst is V2O5, the cocatalyst is alkali metal sulfate, and the carrier is refined diatomite.The results show that SiO2 has a stabilizing effect on the active components, and it increases with the increase of K2O or Na2O content.The activity of the catalyst is also related to the dispersion of the support and pore structure.After treating diatomite with acid, the oxide impurity content decreases, SiO2 content increases, specific surface area and pore volume also increase, so the carrier effect of refined diatomite is better than that of natural diatomite.
The technical Center of Jilin Yuantong Mineral Co., Ltd. now has 42 employees, including 18 professional technicians with senior and intermediate titles engaged in the development and research of diatomite. It has more than 20 sets of advanced special detection instruments at home and abroad, including the content of crystal silicon, SiO2, A12O3, Fe2O3, TiO2 and other chemical compositions of diatomite products.Product particle distribution, whiteness, permeability, cake density, sieve residue, etc.Food safety requirements of trace heavy metal elements such as lead, arsenic, soluble iron ions, soluble aluminum ions, PH value and other items detection.
Post time: Mar-25-2022