Technology and device for co-producing ofproducing industrial monoammonium phosphate and co-producing high-quality monoammonium phosphate by utilizing middle-grade and low-grade collophanite

The invention discloses a technology and a device for co-producing ofproducing industrial monoammonium phosphate and co-producing high-quality monoammonium phosphate by utilizing middle-grade and low-grade collophanite. The technology comprises the following steps: carrying out ore dressing on the middle-grade and low-grade collophanite by utilizing a heavy medium-double-reverse flotation technology to prepare phosphorus concentrate pulp with the mass percent of 32 percent or more based on P2O5; extracting the phosphorus concentrate pulp by utilizing sulfuric acid to obtain phosphoric acid ore pulp; carrying out high-temperature and vacuum filtering on the phosphoric acid ore pulp under the conditions that the temperature is 83 DEG C to 85 DEG C and the pressure is -0.06MPa to -0.07MPa, so as to obtain a phosphoric acid solution; adding a sedimentation agent into the phosphoric acid solution and carrying out sedimentation and filtering to further remove impurities; finally, obtaining a phosphoric acid solutio