Refining furnace depleted copper slag
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I bought a gas generator set together with a reverberatory furnace, which uses water gas as fuel to melt copper slag that is about 7% depleted in purity within the reverberatory furnace. Copper slag contains no sulfur, with 32% silica, 11% iron oxide, 16% alumina, and 12% calcium. Every time, it reaches a molten state – it becomes a liquid – and copper particles have already formed. Later, copper ingots were used; it was intended to form a melt before adding more material. After the copper solution was formed, small amounts of slag were added, but soon a molten layer of solid slag formed on the surface of the copper solution. I would like to ask what are the reasons behind this phenomenon? I analyzed it myself and concluded that the reducing atmosphere is not strong, as it is top-blown, so carbon dioxide can only act on the surface.
You can look for some books on the subject
Indeed, the temperature was not high enough; by utilizing the waste heat from the flue to heat the air ducts, the rate of temperature increase improved significantly, and now the slag has good fluidity. But can the reverberatory furnace associated with a gas generator melt copper oxide? After burning, gas decomposes into carbon dioxide and water. Carbon dioxide does not possess reducing properties, so how can reduction smelting be carried out? Spread coke powder on top of the material again?
The combustion should be controlled so that most of the fuel produces carbon dioxide, which heats and melts the slag, while a small portion of the combustion produces carbon monoxide, which reduces the oxidized phase to yield metal.
Xingo is currently dealing with copper slag like this; the temperature isn’t high enough, so it’s raising the temperature and adding some limestone
Have you used a cupola furnace? High-temperature coking coal, high-calcium gravel, and iron in a 1:1:1 ratio; blown with air – it will definitely melt. The issue is slag removal
Have you used a cupola furnace? High-temperature coking coal, high-calcium gravel, and iron in a 1:1:1 ratio; blown with air – it will definitely melt. The issue is slag removal