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首页> 外国专利> PROCESS FOR REDUCING IRON CONTENT OF RAW MATERIALSPROCESS FOR DECREASING THE IRON CONTENT OF RAW MAT CONTAINING IRON, SILICON AND ALUMINIUM, AS WELL AERIALS CONTA INING IRON, SILICON AND ALUMINIUM ANDS FOR PRODUCING IN THE GIVEN CASE ALUMINIUM OXIDE FOR PREPARING IRON OXIDE FURTHER IN A GIVEN CASE ALUMINIUM OXIDE CONCENTRATE CONCENTRATE

PROCESS FOR REDUCING IRON CONTENT OF RAW MATERIALSPROCESS FOR DECREASING THE IRON CONTENT OF RAW MAT CONTAINING IRON, SILICON AND ALUMINIUM, AS WELL AERIALS CONTA INING IRON, SILICON AND ALUMINIUM ANDS FOR PRODUCING IN THE GIVEN CASE ALUMINIUM OXIDE FOR PREPARING IRON OXIDE FURTHER IN A GIVEN CASE ALUMINIUM OXIDE CONCENTRATE CONCENTRATE

机译：降低原材料的铁含量的过程，用于降低包含铁，硅和铝的原材料的铁含量的过程，以及含铁，硅和铝的气态物质，以及用于生成原状外壳中的铝的氧化的过程案例氧化铝精矿精矿

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The invention relates to an improved process for reducing the iron content of iron-, silicon- and aluminium-containing raw materials and for producing ferric oxide, optionally along with an alumina concentrate. According to the invention the iron content of mineral raw materials, e.g. bauxites, clay minerals, colliary rocks, red muds, etc. is eliminated by passing through one or more beds prepared from the unground but preferably prebroaken and sized raw material an aqueous hydrochloric acid solution, the concentration of which exceeds 100 g./lit., at a temperature below 90 DEG C., preferably at room temperature, optionally in the presence of a flocculating agent. By pyrolytic decomposition of the ferric chloride prepared ferric oxide can be produced. The bed residue of reduced iron content can be utilized in the Bayer process for producing alum earth, as a starting substance of ceramic industry or, after treating with sulfuric acid, dissolving in hydrochloric acid or water, elimination of silica, pyrolytic decomposition of the aluminium sulfate obtained, as an alumina concentrate.
机译：本发明涉及一种改进的方法，用于降低含铁，硅和铝的原料中的铁含量，以及任选地与氧化铝精矿一起生产三氧化二铁。根据本发明，矿物原料中的铁含量例如为1。铝土矿，粘土矿物，胶体岩石，赤泥等通过流经未研磨但优选预破碎并上浆的原料制成的一床或多床床，盐酸水溶液的浓度超过100克/升。在低于90℃的温度下，优选在室温下，任选在絮凝剂的存在下，在室温下进行。通过氯化铁的热分解，可以制得氧化铁。铁含量降低的床渣可以在拜耳法生产氧化铝中用作陶瓷工业的原料，或者在用硫酸处理后，溶于盐酸或水中，除去二氧化硅，铝热解分解。获得的硫酸盐，为氧化铝精矿。

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