Bottom-blowing and side-blowing molten pool reducing furnace for liquid state high lead slag

Abstract

The invention discloses a bottom-blowing and side-blowing molten pool reducing furnace for liquid state high lead slag. The bottom-blowing and side-blowing molten pool reducing furnace for the liquid state high lead slag comprises a furnace body and support bases arranged on the two ends of the furnace body. The outer wall of the furnace body is fixedly provided with rolling rings. The furnace body can be rotatably installed on the support bases through the rolling rings and is driven to rotate by a driving device. The top of the furnace body is provided with a smoke outlet opening, a first material-adding opening and a second material-adding opening from left to right in sequence. The lower part of a side plate of the right end of the furnace body is provided with a slag-discharging opening. A reducing spraying gun device is arranged at the bottom, under the first material-adding opening, of the furnace body. A heating spraying gun device is arranged below the second material-adding opening. The heating spraying gun device is located on the side wall of the furnace body and arranged close to the slag-discharging opening. According to the bottom-blowing and side-blowing molten pool reducing furnace for the liquid state high lead slag, fuel and combustion improver are sprayed from a heating spaying gun into a slag layer of a molten pool, on the one hand, lead oxide of the slag layer is further subjected to reduction reaction, the lead content rate of the slag is decreased, and the direct recovery rate of lead is increased; and on the other hand, the temperature of the slag layer of the molten pool is improved, the slag is conveniently discharged, meanwhile, the distance of the spraying gun and the slag-discharging opening is shorted, the temperature of the molten poll is reduced, and the consumption of energy is reduced.

Description

technical field [0001] The invention relates to a molten pool reduction furnace, in particular to a bottom-side blowing molten pool reduction furnace for liquid high-lead slag, belonging to the technical field of lead smelting in the nonferrous metal smelting industry. Background technique [0002] Chinese invention patent CN200710127659.3 has invented a method and device for direct lead smelting in molten pool and its production practice shows that the patented bottom-blown reduction furnace device can directly process liquid high-lead slag, with low energy consumption and good working environment Good, continuous and stable production and other characteristics, has a good prospect for popularization and application. [0003] At present, the bottom-blown reduction lead smelting furnace has been in production for a long time, and it is found that there are deficiencies in the bottom-blown reduction lead smelting furnace. This deficiency is caused by the structure of the bott...

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Problems solved by technology

[0003] At present, the bottom-blown reduction lead smelting furnace has been in production for a long time, and it is found that there are deficiencies in the bottom-blown reduction lead smelting furnace. This deficiency is caused by the structure of the bottom-blown reduction lead smelting furnace itself. First pass through the bottom lead layer and then enter the slag layer, so that the gas moves from bottom to top, and must drive the lead in the bottom lead layer to enter the slag layer, resulting in high lead content in the slag layer. In order to reduce the lead content of the slag released from the slag outlet, generally The method is used to ensure the distance between the position of the spray gun and the slag outlet and there are enough reducing agent coal particles on the slag layer; to ensure the long enough distance between the position of the spray gun and the slag outlet, so that the lead in the slag layer has enough time for precipitation to be used To reduce the lead content of slag, and there are enough coal particles on the slag layer, which can reduce the lead content of slag

Due to the long enough distance between the position of the spray gun and the slag outlet, the distance between the slag near the slag outlet and the spray gun is long. In order to ensure the slag temperature at the slag outlet and facilitate the release of slag, the temperature of the entire molten pool in the furnace must be increased. The temperature of the pool needs to be provided by the outside, resulting in a waste of energy; at the same time, the slag released from the slag outlet contains a certain amount of coal particles, which does not participate in the reaction, resulting in a waste of energy

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