Patent ID: 11866803
Assignee: CENTRAL SOUTH UNIVERSITY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 5:
6. The method for utilization of dolomite resources according to claim 4, further comprising one or more of the following steps:
adding inhibitor to the digestion device, wherein the inhibitor comprises one or more of ethylene diamine tetraacetic acid, sodium hexametaphosphate, polyacrylic acid, hydrolyzed polymaleic anhydride and nitrilotriacetic acid;
adding dispersant to calcium-containing heavy magnesium aqueous solution, wherein the dispersant comprises one or more of methanol, alcohol, glycerin, polyacrylamide, cellulose derivatives and water glass;
digesting a first batch of calcined white powder in the digestion device with 50-80° C. water, and digesting other batches of calcined white powder with an uncooled decomposition mother liquor;
wherein the solid-liquid ratio of the calcined white powder to the water or the decomposition mother liquor in the digestion device is 1 kg: 10-30 L; and
maintaining a negative pressure state in the pyrolysis kettle, so that the boiling point of calcium-containing heavy magnesium aqueous solution in the pyrolysis kettle is between the pyrolysis temperature of magnesium bicarbonate and the pyrolysis temperature of calcium bicarbonate.