A method of producing alumina by an ore dressing sintering process

By using the mineral processing and sintering method, the problems of rapid red mud transformation and large red mud discharge in the alkali-lime sintering method have been solved, realizing efficient, energy-saving, safe and environmentally friendly alumina production, expanding the range of raw materials, producing high-purity Fe2O3 and SiO2 products, and reducing tailings discharge.

CN117720118BActive Publication Date: 2026-06-12杨光华
View PDF 2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
杨光华
Filing Date
2023-11-21
Publication Date
2026-06-12

Smart Images

  • Figure CN117720118B_ABST
    Figure CN117720118B_ABST
Patent Text Reader

Abstract

This invention discloses a method for leaching alumina through mineral processing and sintering, comprising: raw material preparation, SiO2 leaching, dilution and sedimentation separation of the leached ore slurry, washing and separation of desilicationized ore, refining with sodium silicate solution, carbonation decomposition, washing and separation of the original silicate slurry, calcination, purification of SiO2 carbon mother liquor, evaporation, sedimentation, discharge of SiO2 Na2CO3 crystals, calcination of Na2CO3 crystals, raw material preparation, raw material drying, raw material grinding, raw material pelletizing, raw material pellet drying, clinker sintering, clinker cooling, Al2O3 leaching, dilution and sedimentation separation of Al2O3 leached ore slurry, refining with sodium aluminate solution, carbonation decomposition of sodium aluminate solution, washing and separation of aluminum hydroxide slurry, calcination of aluminum hydroxide, purification of Al2O3 carbon mother liquor, evaporation, sedimentation, discharge of Al2O3 Na2CO3 crystals, and washing, separation, and calcination of tailings to obtain dealkalized ore products. This invention is highly efficient, energy-saving, safe, environmentally friendly, and produces no tailings emissions.
Need to check novelty before this filing date? Find Prior Art