Abstract

The interaction of tungsten mineral raw materials with a mixture of NH₄HF₂ and (NH₄)₂SO₄ upon heating was studied. It was determined that, first, at temperatures up to 200°C, the incoming components are fluorinated to form complex and simple fluorides. A further increase in temperature is accompanied by the decomposition of ammonium sulfate to form NH₄HSO₄, which leads to the conversion of fluorides into sulfates and of the tungsten ammonium fluoride complex into tungstic acid H₂WO₄. It was shown that water leaching of the product of the decomposition of tungsten-containing mineral raw materials with a mixture of NH₄HF₂ and (NH₄)₂SO₄ makes it possible to extract tungsten from mineral raw materials in the form of the commercial product WO₃.

中文翻译：

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含钨矿物原料与氟化氢铵和硫酸盐的混合物的相互作用

摘要

研究了钨矿物原料与NH ₄ HF ₂和(NH ₄ ) ₂ SO ₄混合物在加热时的相互作用。经确定，首先，在高达 200°C 的温度下，引入的组分被氟化，形成复杂和简单的氟化物。温度的进一步升高伴随着硫酸铵分解形成NH ₄ HSO ₄，这导致氟化物转化为硫酸盐以及氟化钨铵络合物转化为钨酸H ₂ WO ₄。_{结果表明，用NH 4} HF ₂和(NH ₄ ) ₂ SO ₄的混合物对含钨矿物原料分解产物进行水浸出，可以从矿物原料中提取钨。商业产品WO ₃。