Method for producing plaster fiber by using carbide slurry
A technology of gypsum fiber and calcium carbide mud, applied in the removal of solid waste, calcium/strontium/barium sulfate, iron sulfide, etc., can solve the problems of reducing the value of calcium carbide mud and waste sulfuric acid recycling, environmental pollution, etc. The effect of large, short process flow and wide application
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[0029] The present invention uses calcium carbide mud as raw material to produce the method for gypsum fiber, at first is to neutralize and decompose calcium carbide mud with nitric acid to obtain calcium nitrate solution, and release hydrogen sulfide tail gas, and its reaction condition is: reaction time is controlled at 10-30min, after the reaction is completed, the material The temperature is controlled at 75-95°C and the pH value is controlled at 5-7. Secondly, the material obtained from the above reaction is subjected to coarse filtration and fine filtration to remove solid impurities to obtain a fine calcium nitrate solution.
[0030] Then, the fine calcium nitrate solution is converted into gypsum fiber with sulfuric acid, and the finished gypsum fiber (CaSO 4 2H 2 o). The specific operation steps are: add fine calcium nitrate solution and sulfuric acid into the reactor in turn, heat until the initial shape of gypsum fibers appears, stop heating, cool down to 60-10°C,...
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