A device for smelting lead-containing waste by anaerobic pressurized process

Abstract

A device for smelting lead-containing waste by anaerobic pressurization process includes a stove, a steel pot, a hydraulic lifting device, a coal pulverizer and a blower, and three pot stoves are arranged in the middle of the stove for placing the steel pot. There is an air inlet at one end of the stove, which is connected to the blower and plays the role of supplying air to the stove; the other end of the stove is left with a smoke outlet, which is connected to the flue, and then leads to the bag dust removal device and the water film respectively. The dust removal device is discharged after reaching the standard; a coal feeding port is left in the middle of the stove, and the coal feeding port is connected to the coal grinding pulverizer. Compared with the traditional technology, the technology of the present invention does not directly utilize thermal energy, but through the preheating of the steel pots on both sides, the defect of low utilization efficiency is avoided; From a slow point of view, it will achieve the purpose of saving energy and reducing consumption, avoiding environmental pollution, and improving production efficiency, realizing the concept of developing a circular economy, and realizing great progress in crude lead smelting technology.

Description

technical field [0001] The invention relates to the technical field of resource regeneration, in particular to a device for smelting lead-containing waste through an oxygen-free pressurized process. Background technique [0002] At present, the traditional smelting lead-containing waste is smelted by the waste disposal unit through pyrotechnics technology, that is, the lead-containing waste is directly sent to the smelting furnace and incinerated with charcoal fire, and a certain amount of iron foam is added, and then crude lead is extracted. A kind of process technology, but there are following defects in this process: [0003] 1. Lead-containing waste is burned together with charcoal fire in the smelting furnace, which will produce a certain amount of soot, commonly known as "flue ash". The lead content in the flue ash is about 40%, and it still needs secondary refining. [0004] 2. The waste slag produced by burning charcoal and lead-containing waste together, commonly k...

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Problems solved by technology

[0005] In the above two cases, secondary smelting is required, which not only wastes energy, but also produces secondary environmental pollution

[0006] 3. Lead in lead-containing wastes generally coexists as simple lead or its oxides (compounds), and under high temperature conditions, lead will still undergo chemical changes to produce new oxides, and finally it will be refined through a replacement reaction with iron fines Crude lead is produced, so the traditional pyrotechnics for smelting lead needs to go through an oxidation reaction and then replace the crude lead. The process delays the time of smelting crude lead, increases energy consumption, increases pollution control costs, and reduces production efficiency, thereby increasing Cost of production

[0007] 4. The air pollution caused by lead smelting is still difficult to be fully avoided despite measures such as bag dust removal and water film dust removal.

[0008] The more advanced smelting method now, the fire process uses natural gas instead of coke. This process technology avoids the secondary pollution caused by the use of coke, but it cannot eliminate the above defects; the wet process technology only stays in the stage of experimentation and small-scale production. No large-scale production has been seen, because there is no uniform standard for the content of lead in lead-containing wastes. Different lead-containing wastes have different proportions of lead on the one hand, and different substances attached to them on the other hand.

The common point of wet process technology is that nitric acid, sulfuric acid or carbonic acid and other acids are needed as pretreatment aids, and the amount of acid used cannot be determined; moreover, these acids are dangerous chemicals, which make the production process of enterprises There are major hidden dangers in production safety, and it increases the company's management and operating costs

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