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发明公开
CN111154974A 一种常压及加压联合酸浸处理低品位红土镍矿的湿法冶金方法 无效 - 撤回

一种常压及加压联合酸浸处理低品位红土镍矿的湿法冶金方法
摘要：
本发明涉及一种常压及加压联合酸浸处理低品位红土镍矿的湿法冶金方法，包括以下步骤：配制过渡矿浆,将加热后的所述过渡矿浆和加热的浓硫酸按一定比例混合，发生酸浸反应，水溶后，固液分离得到常压浸出渣、常压浸出液；配制褐铁矿矿浆，将所述褐铁矿矿浆和所述常压浸出液混合后，加热，在压力为2.0MPa-4.0Mpa、温度为220℃-240℃的条件下加压浸出，降温后，进行固液分离，得到加压浸出渣和加压浸出液；对加压浸出渣利用压球、焙烧工艺制成铁精粉。本发明酸耗低、镍钴铁的浸出率高、所需设备成本低，并且能将硅铁有效分离，获得铁含量高的精铁矿。
摘要（英）：

Disclosed is a wet metallurgy method for treating low-quality lateritic nickel ore using atmospheric pressure and elevated pressure combined acid leaching, comprising the following steps: formulating a transition ore pulp, mixing the heated transition ore pulp and heated concentrated sulfuric acid in a certain proportion, performing an acid leaching reaction, and performing solid-liquid separation after dissolution in water to obtain an atmospheric leaching residue and an atmospheric leaching liquid; formulating a limonite ore pulp, mixing the limonite ore pulp and the atmospheric leaching liquid, heating same, performing pressure leaching under a pressure of 2.0 MPa - 4.0 MPa and a temperature of 220 °C - 240 °C, and then performing solid-liquid separation after cooling to obtain a pressure leaching residue and a pressure leaching liquid; and preparing the pressurized leaching residue into iron powder by using ball pressing and a roasting process.

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