Copper refining process in United States Montana State’s Butte:
Generally use a relatively simple process, after a period of grinding fineness of -200 mesh about 50% to 70%, a rougher, 2 or 3 times selected, 1 or 2 times sweep the election. Such as copper minerals disseminated particle size is relatively small, we can consider the stage of grinding and separation processes. Bornite ore dressing plant, most of the crude concentrate regrinding – a selection of stage grinding and separation processes, and its essence is mixed – flotation process. First by a period of rough grinding, roughing, scavenging, and then crude concentrate regrinding and then selected high-grade copper concentrate and concentrate. Coarse pulverized -200 mesh and about 45% to 50%, then pulverized -200 mesh about 90% to 95%.

Dense symbiotic dense copper ore as chalcopyrite and pyrite, pyrite is often secondary copper-activated pyrite with higher levels of difficult to inhibit the separation difficult. The sorting process, while copper concentrate and concentrate. Usually on a copper tailings is sulfur concentrate. If the ore gangue content of more than 20% to 25%, need to re-sorting to get the sulfur concentrate. Dealing with dense copper ore, often with two grinding stage grinding, grinding fineness require smaller.

Sand washing machine of Henan Liming heavy industry is an advanced production,