A method of purifying raw phosphoric acid (such as MGA acid) by adding ash derived from a waste incineration site, including the production of purified phosphoric acid, calcium sulfate, water-soluble calcium hydrogen phosphate and metal salt solution.

摘要

The present invention refines raw phosphoric acid by adding ash and calcium hydroxide and at least one sulfide from a waste incineration plant, and performs calcium sulfate, purified phosphoric acid, metal salt solution and / or hydrogen phosphate by wet chemical decomposition. The present invention relates to a method of obtaining (generating) calcium (such as heavy superphosphate lime). [Selection figure] None