一种电解铝清包渣高温改性制备覆盖剂的方法及其产物与制备系统
By converting sodium nitrate into a covering agent through high-temperature calcination of fine aluminum slag powder, the problems of AlN decomposition and resource utilization in aluminum slag treatment were solved, achieving efficient and environmentally friendly production of covering agents and improved stability in electrolytic aluminum production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUOLINGUOLE JINLIAN ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2026-04-24
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for treating slag from cleaning packages have problems such as the generation of nitrogen gas from AlN decomposition affecting the stability of the electrolyte system and the accumulation of fluoride salt impurities. Furthermore, wet treatment processes are lengthy and costly, resource utilization methods are limited, and traditional covering agents consume a large amount of raw materials.
Sodium nitrate and fine powder of slag are calcined at high temperature to convert AlN into Al2O3 and N2 through oxidation reaction, generating sodium aluminate and stable fluoroaluminate, forming a covering agent suitable for electrolytic aluminum production. Combined with online component analysis and automated control system, precise proportioning and continuous production are achieved.
It completely eliminates the environmental hazards of AlN, increases the value of resource utilization, reduces the production cost of electrolytic aluminum, realizes the harmless recycling of slag and the direct reuse of covering agent, and the system operates efficiently, continuously and environmentally friendly.
Smart Images
Figure CN122082049B_ABST