The floatability of arsenopyrite

Aromatic sand is the most widely distributed sulfur- arsenic compound, which is divided into FeAsS and contains As46%. The poisonous sand is more common in high-temperature hydrothermal deposits and is symbiotic with copper , lead , zinc and other sulfides. According to statistics, the As/Cu ratio in the 15% copper resources in the world is 1:5, 30% cobalt resources. For a 2:1, 10% tin resource has an As/Sn ratio of 10:1. Because the formation conditions of the arsenopyrite are similar to these minerals, it often enters the concentrate during the sorting process, causing the arsenic content of the sulfide ore concentrate to meet the smelting requirements.

There are three main sources of arsenic in copper concentrates: (1) Arsenic exists in copper minerals in the form of isomorphism. It cannot be separated by flotation, but it usually has little effect on arsenic in copper concentrate. (2) Arsenic-containing copper minerals - arsenic bismuth copper ore, sulphur arsenic copper ore, etc. are enriched in copper concentrates. (3) Arsenic-containing minerals - mainly mixed with arsenopyrite. How to solve the separation of copper minerals and arsenopyrite is the main measure to reduce arsenic in copper concentrates.

The floatability of arsenopyrite is similar to that of other sulfide minerals. It is very buoyant in weakly acidic media, and its floatability is reduced by pH>7. The flotation collector is a thio compound. Metal ions (e.g., Cu 2 +) strong activation of arsenopyrite flotation, the arsenopyrite surface after activation 2 Cu + copper minerals having similar floatability. Studies have shown that the activation of arsenopyrite by Cu 2 + is due to its selective adsorption on the crystal lattice of arsenic minerals, which becomes a place to firmly fix xanthate, so that the arsenopyrite obtains good floatability, which causes copper arsenic. Difficulties in the separation of minerals.

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