System and method for treating calcium carbide residues
A technology of calcium carbide slag and water glass, applied in the direction of carbide, calcium carbide, etc., can solve the problems that calcium carbide slag cannot be recycled into calcium carbide, air-dried ash, pollutes the surrounding environment, etc., and achieves the effect of resource utilization
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[0077] Carbide slag from a calcium carbide company in Inner Mongolia was used, and the composition is shown in Table 1.
[0078] Table 1 Composition analysis of calcium carbide slag after roasting
[0079]
[0080] Mix calcium carbide slag and liquid caustic soda evenly, wherein calcium carbide slag (dry basis): liquid caustic soda (30wt%)=1000:70, after mixing evenly, pump the mixed material into the reaction kettle, and feed 0.7 to 0.8 MPa steam, directly heat the mixed material, and keep stirring to make it undergo a synthesis reaction. When the pressure of the reactor rises to 0.5-0.7 MPa and the temperature reaches 150-160 degrees Celsius, stop feeding the steam and keep the pressure and temperature stable for 4~ After 6 hours, open the outlet valve, send the water-containing glass feed liquid to the filter press of the filter device, filter through the plate filter press, and the filtrate enters the filtrate storage tank to obtain the crude water glass product, and th...
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