The invention discloses a recycling method of
carbide slag, which comprises the following steps of: (1) reacting the
carbide slag with the solution of
sodium carbonate and filtering the reaction solution to obtain filtrate B and filter residue A, wherein the filtrate B is the solution of
sodium hydroxide; (2) adding the filtrate A into
hydrochloric acid, heating the mixture till the mixture boilsto perform a reaction, filtering the reaction solution to obtain a filter residue C and a filtrate D, wherein the filter residue C is used as clinker for
cement production; and (3) adding
hydrogen peroxide into the filtrate D to perform a reaction for 10 and 20 minutes, adjusting pH value of the reaction solution to 8.5 and 9.0 by using saturated
lime water, filtering the reaction solution,
drying the filter residue to obtain
ferric hydroxide, concentrating the filtrate to precipitate a
calcium chloride dehydrate
solid,
processing the obtained concentrated residual liquid by using the solution of
sodium carbonate, filtering the
mixed solution to obtain a
solid mixture of
magnesium carbonate and
calcium carbonate, reacting the mixture react with the solution of sulphuric acid and filteringthe reaction solution to obtain
calcium sulphate solids and the solution of
magnesium sulfate. The resource
processing method for the
carbide slag has the advantages of various byproducts, high product quality, simple process flow, small equipment investment, easy operation, mild
reaction conditions, low production cost, environmental friendliness and wide application prospect.