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Sodium removal method for calcined alpha alumina
The invention particularly relates to a sodium removal method for calcined alpha alumina, and belongs to the technical field of inorganic non-metallic material synthesizing. The method comprises the steps that industrial alumina is subjected to CO2 washing pretreatment, and a pretreated raw material is obtained; mixing the pretreated raw material with a sodium removal agent and a mineralizing agent to obtain a calcined mixture; calcining the calcined mixture to obtain sodium-removed alpha alumina; a two-stage deep sodium removal process for calcining alpha alumina is provided, Na2O in the product can reach 0.04% or below, the content of alpha-Al2O3 can reach 95-98%, the product quality is improved, the usage amount of a mineralizer is reduced, and the adverse effect of the mineralizer on the environment and the product is reduced.
本发明特别涉及一种煅烧α氧化铝的脱钠方法，属于无机非金属材料合成技术领域，方法包括：将工业氧化铝进行CO2洗涤预处理，获得预处理原料；将所述预处理原料与脱钠剂、矿化剂进行混合，获得煅烧混合料；将所述煅烧混合料进行煅烧，获得脱钠α氧化铝；提出了煅烧α氧化铝两级深度脱钠工艺，产品Na2O可达到0.04％以内，α‑Al2O3含量可达95‑98％，不仅提升了产品质量，降低了矿化剂使用量，进而降低了矿化剂对环境和产品的不利影响。
Sodium removal method for calcined alpha alumina
The invention particularly relates to a sodium removal method for calcined alpha alumina, and belongs to the technical field of inorganic non-metallic material synthesizing. The method comprises the steps that industrial alumina is subjected to CO2 washing pretreatment, and a pretreated raw material is obtained; mixing the pretreated raw material with a sodium removal agent and a mineralizing agent to obtain a calcined mixture; calcining the calcined mixture to obtain sodium-removed alpha alumina; a two-stage deep sodium removal process for calcining alpha alumina is provided, Na2O in the product can reach 0.04% or below, the content of alpha-Al2O3 can reach 95-98%, the product quality is improved, the usage amount of a mineralizer is reduced, and the adverse effect of the mineralizer on the environment and the product is reduced.
本发明特别涉及一种煅烧α氧化铝的脱钠方法，属于无机非金属材料合成技术领域，方法包括：将工业氧化铝进行CO2洗涤预处理，获得预处理原料；将所述预处理原料与脱钠剂、矿化剂进行混合，获得煅烧混合料；将所述煅烧混合料进行煅烧，获得脱钠α氧化铝；提出了煅烧α氧化铝两级深度脱钠工艺，产品Na2O可达到0.04％以内，α‑Al2O3含量可达95‑98％，不仅提升了产品质量，降低了矿化剂使用量，进而降低了矿化剂对环境和产品的不利影响。
Sodium removal method for calcined alpha alumina
一种煅烧α氧化铝的脱钠方法
ZHAO SHANLEI (author) / WANG SHAOWU (author) / FENG XIAOMING (author) / JIA YEKAI (author) / QIN NIANYONG (author) / QI BO (author) / WANG KE (author) / YU JIANG (author)
2021-08-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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