Huade County, Inner Mongolia is rich in high quality diatomite resources. The SiO 2 is 81% to 89%, the Al 2 O 3 is 3% to 8%, the Fe 2 O 3 is 1.2% to 2.2%, and the loose density is 0.33% to 0.40%. In 1995, Huade Diatomite Industry Co., Ltd. built a 30,000-ton diatomaceous earth filter aid processing plant. The process flow is shown in the figure below. The main brands of the product are 100 # -A,100 # -B,700 # -A,700 # -B, etc.
3.Yunnan Kunming Refractory Material Factory
The ore is a diatomite produced in the Tengchong area of ​​western Yunnan, with good quality, mainly Navicula, followed by M. algae, Larval algae, and Spirulina. In order to purify the diatomaceous earth, Kunming Refractory Material Factory built a diatomite production line with an annual output of 3kt of fine soil in the early 1990s. The process flow is shown in the following figure. The ore SiO 2 is 74.62%, Fe 2 O 3 is 1.69%, Al 2 O 3 is 13.76%, CaO is 1.46%, and MgO is 1.59%. The diatomaceous earth purified by the process has SiO 2 87.21%, Fe 2 O 3 0.57%, Al 2 O 3 5.6%, CaO 0.36%, and MgO 0.14%. Tailings waste residue is used to produce insulation materials.
(3) Main types and uses of deep processed products
Due to the special structural structure of diatomite, it has many special technical physical properties, such as large void fraction, strong adsorption performance, light weight, sound insulation, wear resistance, heat resistance and certain strength. It is widely used. In the light industry, chemical, building materials, petroleum , medical and health departments.
1. Diatomaceous earth filter aid Mainly used for the filtration of alcohol, oil, paint, fertilizer, acid and alkali, medicine, water and other liquids.
2. Celite thermal insulation products (1) diatomaceous earth heat-insulating material (including insulation bricks, insulation board, pipe insulation, insulation concrete, etc.) are widely used in metallurgy, building materials, machinery, and other industrial sectors as well as the energy boilers, retort Insulation of heat treatment furnace and dryer.
(2) Microporous calcium silicate insulation materials are widely used for thermal insulation of industrial and civil buildings.
3. Filler Used as filler and reinforcing filler for pigments, paints, paper, asphalt , plastics, rubber, etc.
4. The catalyst carrier used in the oil hydrogenation process nickel catalyst, vanadium catalyst in a sulfuric acid manufacturing a carrier, such as oil and phosphoric acid catalyst.
5. diatomite firing useful for polishing a polishing agent of vehicle shells, marble, silver and gold and treasure jade jewelry and the like.
6. Explosive density adjuster As a good carrier and diluent for explosive nitroglycerin, it disperses ammonium nitrate and reduces the agglomeration of explosives. It is also an additive for stabilizing emulsion colloid.
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