Method for directly preparing high-purity white carbon black from fluorine-containing silicon slag
A technology of fluorine-containing silicon slag and white carbon black, applied in chemical instruments and methods, aluminum fluoride, silicon oxide, etc., can solve the problems of difficult to achieve product quality, difficult to achieve industrialization, complex white carbon black process, etc. Low, high yield, short and practical effect of process
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Embodiment 1
[0023] Using fluorine-containing silicon slag as a by-product of aluminum fluoride produced by a company in Hubei as raw material, its technical indicators are:
[0024] SiO 2 : 60.3% (dry basis); NSA: 28m 2 / g.
[0025] 1. Deacidification, homogeneous beating and dispersing materials
[0026] The fluorine-containing silicon slag material separated by the vacuum belt filter is then deacidified by a centrifuge (or the fluorine-containing silicon slag separated from the vacuum belt filter can be directly sent to the homogeneous kettle), after deacidification Weigh containing H 2 SiF 6 300Kg of material with a liquid volume of 50% is sent to a 1000L homogeneous mixing tank and tap water is added for beating. The slurry concentration is controlled at 30%, and the stirring speed is controlled at 2000-2300r / min. After 300min, the sample is separated into pear-shaped liquid Observed in the funnel, a stable suspension was formed, and its pH=2 was measured with precision test pape...
Embodiment 2
[0032] Using fluorine-containing silicon slag as a by-product of aluminum fluoride produced by a company in Hubei as raw material, its technical indicators are:
[0033] SiO 2 : 55.8% (dry basis); NSA: 30m 2 / g.
[0034] 1. Deacidification, homogeneous beating and dispersion
[0035] Weigh 300Kg of the fluorine-containing silicon slag material separated by the vacuum belt filter (containing H 2 SiF 6 Liquid volume is 60%) in the homogeneous kettle, add tap water and carry out beating, slurry concentration is controlled at 25%, and stirring speed is controlled at 2500-2800r / min, and the time is 240min, and sampling is observed in the pear-shaped separating funnel, has formed Stable suspension, its pH=2 measured with precision test paper. Then dehydrate, then put the dehydrated material into a homogeneous kettle and add tap water to make the slurry concentration 20%, open the beater for beating for 60 minutes, take samples for observation, and form a stable suspension. The...
Embodiment 3
[0041] Using fluorine-containing silicon slag as a by-product of aluminum fluoride produced by a company in Hubei as raw material, its technical indicators are:
[0042] SiO 2 : 40.8% (dry basis); NSA: 21m 2 / g
[0043] 1. Centrifugal deacidification, homogeneous beating and dispersion
[0044] Weigh 300Kg of fluorine-containing silicon slag material after centrifugal deacidification (containing H 2 SiF 6 Liquid volume is 53%) put into the homogeneous kettle and add tap water to beating, the slurry concentration is controlled at 10%, the stirring speed is controlled at 3000-3200r / min, time 180min, then sampling is observed in the pear-shaped separating funnel, forms A stable suspension was obtained, and its pH=2 was measured with precision test paper. Then dehydrate, then put the dehydrated material into the homogeneous kettle, add tap water to make the slurry concentration 30%, turn on the beater, beat at the same speed for 45 minutes, and then set aside.
[0045] 2. So...
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