Method for producing aluminum oxide by using alkaline method
An alumina and alkali process technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of large material flow, high energy consumption, poor technical economy, etc., and achieve small material flow, low energy consumption, and solid residue volume less effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Example Embodiment
[0038] Example 1
[0039] The raw material is bauxite in a certain place, and the main chemical composition is Al 2 O 3 56%, SiO 2 22%, the fineness after grinding is -80 mesh limestone powder, sodium carbonate and the evaporated mother liquor of carbonation decomposition according to CaO and SiO 2 The molar ratio is 1.1, Na 2 O and Al 2 O 3 + Fe 2 O 3 The molar ratio is 1.4 to control the ingredients to prepare raw meal; the raw slurry is fired at a temperature of 1200 ℃ to obtain qualified clinker; the clinker is leached at 80-90 ℃ with the adjusting solution, and the alumina in the clinker The leaching rate was 86%, and the sodium oxide leaching rate in the clinker was 81%.
[0040] The concentration of caustic alkali used for the solid residue after clinker dissolution is Na 2 O K 30g / L lye is leached for 300 minutes at a temperature of 95℃, the leaching liquid-to-solid ratio is 3, and the solid phase residue contains Al 2 O 3 The leaching rate is 19%, and the solid resid...
Example Embodiment
[0041] Example 2
[0042] The raw material is bauxite in a certain place, and the main chemical composition is Al 2 O 3 55.21%, SiO 2 15.28%, the fineness after grinding is -80 mesh lime powder and sodium carbonate and the carbonation decomposition mother liquor after evaporation according to CaO and SiO 2 The molar ratio is 1.2, Na 2 O and Al 2 O 3 + Fe 2 O 3 The molar ratio is 1.6 to control the ingredients to prepare raw meal; the raw slurry is fired at a temperature of 1220°C to obtain qualified clinker; the clinker is leached at 75-95°C with the adjusting solution, and the alumina in the clinker The leaching rate can reach 91%, and the leaching rate of sodium oxide in the clinker is 83%.
[0043] The concentration of caustic alkali used for the solid residue after clinker dissolution is Na 2 O K 100g / L lye is leached for 240 minutes at a temperature of 95℃, the leaching liquid-to-solid ratio is 5, and the solid phase residue contains Al 2 O 3 The leaching rate is 21%, and...
Example Embodiment
[0044] Example 3
[0045] The raw material is perchite syenite (the main chemical composition is Al 2 O 3 23.21%, SiO 2 55.90%), the fineness after grinding is -80 mesh limestone powder and sodium carbonate and the carbonation decomposition mother liquor after evaporation according to CaO and SiO 2 The molar ratio is 1.0, Na 2 O and Al 2 O 3 + Fe 2 O 3 The molar ratio is 2.0 to control the ingredients to prepare raw meal; the raw slurry is fired at a temperature of 1230°C to obtain qualified clinker; the clinker is leached with the adjusting solution at 80-90°C, and the clinker contains alumina The leaching rate was 83%, and the sodium oxide leaching rate in the clinker was 79%. .
[0046] The concentration of caustic alkali used for the solid residue after clinker dissolution is Na 2 O K 120g / L, α k The 10.5 sodium aluminate solution is leached for 120 minutes at a temperature of 90°C, the leaching liquid-to-solid ratio is 7, and the solid phase residue contains Al 2 O...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap