Osmet smelting technology is widely used in various metal extraction processes. It can smelt copper concentrate to produce copper matte, directly smelt sulfide concentrate to produce crude lead, smelt tin concentrate to produce tin, and can also process smelters. of various slag and recycled materials. The Osmet process is to cause intense agitation and mixing between the melt-charge-gas in the molten pool, which greatly enhances heat transfer, mass transfer, and chemical reaction rates, so as to produce higher economics in terms of fuel requirements and production capacity. benefit. The spray gun of the Osmet method is vertically immersed in the slag layer. The structure of the spray gun is special, the size of the furnace is relatively compact, and the overall equipment is simple.
Ausmelt technology is based on the original Siro smelting method and Isa smelting method, and has carried out a lot of applied technology development, especially the addition of the outer sleeve of the spray gun, so that the required secondary combustion air in the furnace can be It is directly sprayed into the furnace from the same spray gun, so that the metal vapor and incompletely burned carbonaceous particles above the molten pool can be fully burned, and absorbed by the intensely stirred melt, which greatly improves the thermal efficiency of the furnace reaction. , while also improving the properties of the flue gas.
The structure of Osmelt furnace is composed of furnace shell, furnace lining, furnace bottom, furnace wall, furnace top, spray gun, spray gun holding frame and lifting device, feeding device, rising flue and product discharge port. The design of the rising flue is to ensure that the flue gas is unobstructed, and the second is to try to prevent adhesion and blockage, and to ensure that it is easy to clean after adhesion occurs. The structural forms of the flue are inclined and vertical. The flue is lined with refractory materials, so that the slag entering the flue can flow back into the furnace by itself. The inclined flue is heavily bonded and difficult to clean. The vertical flue is a part of the heating surface of the waste heat boiler. This type of flue has a low temperature on the inner wall of the flue, and the smoke and dust are easy to bond, but the bonding layer is easy to fall off and is easy to clean.
Osmelt furnace has fast smelting speed, high productivity, low construction investment, low production cost, strong adaptability of raw materials, flexible and convenient matching with existing equipment, easy operation, high degree of automation, wide range of fuel adaptation, and good labor. sanitary condition. However, the life of the furnace is short, and the heat preservation of the spray gun requires diesel or natural gas, which is more expensive.
