Method for preparing organic environment friendly snow-melting agent by using salt mud from two-alkali method

A method for preparing an organic environment-friendly snow-melting agent by using a salt mud from a two-alkali method, comprising:

• reacting the salt mud with an organic acid to obtain a slurry;
• filtering the slurry to obtain a filtrate;
• wherein the filtrate is then concentrated, dried by centrifugal spray drying, and granulated in sequence to obtain the organic environment-friendly snow-melting agent and wherein the method comprises following specific steps:
• (1) stirring and reacting the organic acid and the salt mud at room temperature to obtain the slurry;
• (2) filtering the slurry obtained in step (1) to obtain the filtrate, the filtrate is then concentrated under reduced pressure and dried by centrifugal spray drying to obtain a solid powder;
• (3) granulating the solid powder obtained in step (2) to obtain the organic environment-friendly snow-melting agent;
• a composition of the salt mud in step (1) is calculated based on weight parts:
• 85-95 weight parts of CaCO3, 0.5-1.5 weight parts of NaCl, 8.5-13.2 weight parts of Mg(OH)2, 1.5-4.0 weight parts of CaSO4, 0.5-1.5 weight parts of Fe(OH)3, 0.5-1.0 weight parts of Al(OH)3 and 0.1-2.0 weight parts of SiO2.