1results about How to "No output" patented technology

This invention discloses a method for purifying silica from quartz minerals, comprising the following steps: Step 1) Adding hydroxide to a quartz mineral slurry to obtain an aluminum removal reaction slurry, wherein the OH in the aluminum removal reaction slurry... ‑ The concentration is 0.02-0.5 mol / L; the aluminum removal reaction slurry is heated to 50-120℃ under closed conditions and stirred for 0.5-12 h. After the reaction, solid-liquid separation is performed to obtain aluminum-removed quartz mineral; step 2) a high-alkali enhanced oxidant solution is added to the aluminum-removed quartz mineral to obtain an iron removal reaction slurry, wherein the high-alkali enhanced oxidant contains peroxide, carbonate and hydroxide, and the OH- concentration in the iron removal reaction slurry is 0.5-10.0 mol / L; the iron removal reaction slurry is heated to 120-200℃ under closed conditions and stirred for 0.5-2 h, and then heated to 200-280℃ under closed conditions and stirred for 0.1-1 h. After the reaction, solid-liquid separation is performed to obtain purified silica.