Method of producing white carbon black from low-grade bauxite
A technology of bauxite and white carbon black, applied in the direction of silica, silicon oxide, etc., can solve the problems of high environmental requirements, low reinforcement performance, high energy consumption, etc., achieve sufficient desiliconization reaction, avoid environmental pollution, increase The effect of exposure time
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Embodiment 31
[0100] Stirring and kneading balls: remove 20.000g of iron bauxite, and the silicon content in it is 15.75%; grind the 20.000g of iron removal bauxite into 200 mesh particles, and then add ammonium fluoride and a small amount of water with a reaction ratio of 1 times mixing, kneading into a plurality of compact mixing balls, and placing the plurality of mixing balls in an oven to keep warm and dry to remove moisture therein, so as to form a plurality of mixed slag particles.
[0101] Roasting and desiliconization: then respectively place a plurality of the mixed slag particles in a fluidized bed reactor, and roast them at 500°C for 3 hours. After the reaction, 18.125 g of iron-removing bauxite products with a silicon content of 1.39% and Decomposition waste gas containing silicon fluoride gas, wherein the removal rate of silicon in the above-mentioned iron-removing bauxite is 92.00%, and the silicon content in the gaseous organisms is 2.898g.
[0102] Gas absorption ammonolysi...
Embodiment 32
[0104] The steps for preparing white carbon black provided in this embodiment 3.2 are basically the same as the steps for preparing white carbon black provided in Example 3.1, the differences are as follows:
[0105] In the step of stirring and kneading the balls, ammonium fluoride with a reaction ratio of 1.2 times is added to the iron-removing bauxite;
[0106] In the step of roasting and desiliconization, the roasting reaction temperature is 700°C. After the roasting reaction is completed, 18.076 g of aluminum fluoride solid residue product with a silicon content of 3.98% and a gas product containing silicon fluoride gas are obtained, wherein the above-mentioned The removal rate of silicon in the iron-removing bauxite is 77.16%, and the silicon content in the gaseous organism is 2.431g;
[0107] In the step of producing white carbon black by gas absorption and ammonium decomposition, the gas product is passed into the absorption tower at -5kPa, and the gas product is hydrol...
Embodiment 33
[0109] The steps for preparing silica provided in Example 3.3 are basically the same as the steps for preparing silica provided in Example 3.1, the differences are as follows:
[0110] In the step of stirring and kneading the balls, ammonium fluoride with a reaction ratio of 1.2 times is added to the iron-removing bauxite;
[0111] In the step of roasting and desiliconization, the roasting time is 1h. After the roasting reaction is completed, 17.421g of an aluminum fluoride solid residue product with a silicon content of 1.27% and a gas product containing silicon fluoride gas are obtained. The removal rate of silicon in bauxite is 92.98%, and the silicon content in the gas organism is 2.929g;
[0112] In the step of producing white carbon black by gas absorption and ammonia decomposition, the gas product is passed into the absorption tower at -4kPa, and the gas product is hydrolyzed at 80°C. The pH of the substance in the mixture is 8, and it is aged at 80°C for 2 hours, and ...
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