Combined regenerated lead oxygen-enriched three-blowing energy-saving smelting furnace

Abstract

The invention discloses a combined regenerated lead oxygen-enriched three-blowing energy-saving smelting furnace. A furnace body 1 is arranged vertically, the whole furnace body 1 is divided into a lower section, a middle section and an upper section, the lower section is a smelting area 4 and comprises a stationary area 20, a bubbling area 21, and a reduction area 22 from bottom to top, the middle section is a waste heat utilization area 5, the lower half part of the waste heat utilization area is a secondary combustion area 23, the upper half part of the waste heat utilization area is a raw material preheating area 24, the upper section is a smoke discharging and feeding area 6. The vertical furnace body is more convenient to fully use the waste heat of the offgas for preheating the raw material, so that the energy-saving effect is remarkably improved, the dosage of the reducing agent is reduced, and the content of lead in the slag is lowered. The novel furnace body adopts a metal water jacket component and is combined by segmental hoisting, thus being convenient to maintain, and greatly lowering the maintenance cost.

Description

technical field [0001] The invention relates to the technical field of metal smelting, more specifically to an assembled regenerated lead-enriched oxygen-enriched three-blowing energy-saving smelting furnace. Background technique [0002] With the intensification of the energy crisis, the importance of lead-acid batteries as energy storage carriers for new energy sources such as solar energy, wind energy, and nuclear energy has become increasingly apparent. However, lead mineral resources are facing depletion, and the recycling of secondary lead has become inevitable. Secondary lead is an emerging industry, and its smelting technology is in the exploratory stage. Its high energy consumption and high pollution issues have attracted much attention. National policies clearly require secondary lead smelting to ban various reverberatory furnaces that directly burn coal, speed up technological innovation, and promote energy conservation and emission reduction. At present, ...

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Problems solved by technology

In the past two years, a new side-blowing smelting furnace has been further improved in terms of energy saving and reduction of lead content in waste slag, but there are still several problems that need to be improved urgently: first, the disturbance and stirring effect of the melt in the furnace pool is not good; The reason is that the fixed feeding port causes uneven feeding, the closed molten pool cannot be stirred directly, and the reduction is difficult to complete completely. To increase the reduction degree, excessive addition of reducing agent is forced, resulting in serious waste of reducing agent; the third is that the oxygen blown into the molten pool is mixed with gas The proportion of gas is difficult to control scientifically. If the proportion of oxygen is too high, it will cause excessive oxidation, which will affect the reduction of the melt and increase the amount of reduction, resulting in high energy consumption. The proportion of oxygen is low, resulting in endless combustion of gas and waste of energy. Fourth, the heat-resistant material of the furnace is corroded. The damage is fast, and the furnace body is built at one time, so it is inconvenient to disassemble and the maintenance cost is high

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