A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention relates to the technical field of lithium carbonate production, in particular to a method for preparing lithium carbonate through thermal reduction by taking alpha-type spodumene as a raw material. The method comprises the following steps: mixing alpha-type spodumene concentrate powder with a reducing agent and a flux inhibitor, carrying out reducing in a reduction furnace under vacuum and high-temperature conditions to reduce lithium in spodumene into metal lithium steam, and condensing to obtain metal lithium and reduced spodumene slag containing the metal lithium and lithium oxide; leaching spodumene slag containing metal lithium and lithium oxide with water to obtain leached slag and slurry; and precipitating the leaching residues and the slurry, removing calcium, filtering to obtain a filtrate which is a lithium carbonate raw material solution, and concentrating and precipitating lithium to produce a battery-grade or high-purity lithium carbonate product. The new method is a green and environment-friendly technology, production of high-risk chemical chlorine and use of sulfuric acid in the prior art are avoided, and the environmental load is small; environmental pollution and solid waste emission are avoided, the environmental benefit is high, and the safety is high.
本发明涉及碳酸锂生产技术领域，具体为一种以α型锂辉石为原料进行热还原制碳酸锂的方法。该方法包括以下步骤：将ɑ型锂辉石精矿粉末与还原剂、阻熔剂混合，在真空、高温条件下，在还原炉中进行还原，使锂辉石中的锂还原为金属锂蒸汽，再经过冷凝，得到金属锂与还原后的含有金属锂和氧化锂的锂辉石矿渣；含有金属锂和氧化锂的锂辉石矿渣用水浸出，得浸出渣和料浆；将浸出渣和料浆沉淀除钙、过滤，滤液为碳酸锂原料溶液，再经浓缩、沉淀锂，生产电池级或高纯碳酸锂产品。本新方法为绿色环保技术，避免了现有技术中的高危化学品氯气的生产和硫酸的使用，环境负荷小；无环境污染和固体废物排放，环境效益好，安全性好。
The invention relates to the technical field of lithium carbonate production, in particular to a method for preparing lithium carbonate through thermal reduction by taking alpha-type spodumene as a raw material. The method comprises the following steps: mixing alpha-type spodumene concentrate powder with a reducing agent and a flux inhibitor, carrying out reducing in a reduction furnace under vacuum and high-temperature conditions to reduce lithium in spodumene into metal lithium steam, and condensing to obtain metal lithium and reduced spodumene slag containing the metal lithium and lithium oxide; leaching spodumene slag containing metal lithium and lithium oxide with water to obtain leached slag and slurry; and precipitating the leaching residues and the slurry, removing calcium, filtering to obtain a filtrate which is a lithium carbonate raw material solution, and concentrating and precipitating lithium to produce a battery-grade or high-purity lithium carbonate product. The new method is a green and environment-friendly technology, production of high-risk chemical chlorine and use of sulfuric acid in the prior art are avoided, and the environmental load is small; environmental pollution and solid waste emission are avoided, the environmental benefit is high, and the safety is high.
本发明涉及碳酸锂生产技术领域，具体为一种以α型锂辉石为原料进行热还原制碳酸锂的方法。该方法包括以下步骤：将ɑ型锂辉石精矿粉末与还原剂、阻熔剂混合，在真空、高温条件下，在还原炉中进行还原，使锂辉石中的锂还原为金属锂蒸汽，再经过冷凝，得到金属锂与还原后的含有金属锂和氧化锂的锂辉石矿渣；含有金属锂和氧化锂的锂辉石矿渣用水浸出，得浸出渣和料浆；将浸出渣和料浆沉淀除钙、过滤，滤液为碳酸锂原料溶液，再经浓缩、沉淀锂，生产电池级或高纯碳酸锂产品。本新方法为绿色环保技术，避免了现有技术中的高危化学品氯气的生产和硫酸的使用，环境负荷小；无环境污染和固体废物排放，环境效益好，安全性好。
Method for preparing lithium carbonate through thermal reduction of spodumene
一种锂辉石热还原制碳酸锂的方法
2021-06-22
Patent
Electronic Resource
Chinese
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