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Double-area molten pool smelting furnace and lead and tin co-smelting smelting method thereof

A molten pool smelting furnace and molten pool technology, applied in the field of lead smelting and tin, can solve the problems that the latent heat of lead oxidation heating can not be effectively used, increase the cost of mining and selection, and low metal recovery rate, so as to improve the processing capacity of the hearth and save energy Remarkable consumption reduction and high metal recovery rate

Active Publication Date: 2016-10-12
云南国傲环境科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smelting process of lead and tin is different. When smelting separately, not only the lead and tin need to be separated during the beneficiation, which increases the cost of mining and beneficiation, but also the latent heat of lead oxidation heating cannot be effectively used, the energy consumption is high, and the metal recovery rate is low.

Method used

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  • Double-area molten pool smelting furnace and lead and tin co-smelting smelting method thereof
  • Double-area molten pool smelting furnace and lead and tin co-smelting smelting method thereof
  • Double-area molten pool smelting furnace and lead and tin co-smelting smelting method thereof

Examples

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Effect test

Embodiment 1

[0031]Example 1: Mix the material containing Pb10%, Sn10% with quartz stone and limestone, mix according to the silicic acidity of the slag is 0.95, mix evenly and make granular, put into the double-zone melting pool melting furnace from above, Air containing 24% oxygen is blown into the oxidation tuyere above, the tuyere pressure is controlled at 0.03Mpa, the material gradually melts and falls, and pulverized coal is introduced into the reduction tuyere, the pressure of the reduction tuyere is 0.05Mpa, and the melting temperature is kept at 1130°C. Minutes later, open the siphon discharge port to release the lead-tin metal, then open the slag port to let the slag flow into the reduction electric furnace, add anthracite as the reducing agent in the electric furnace, control the voltage to 90V, the current to 3500A, the temperature to 1300°C, and smelt for 6 Hours later, the content of lead and tin in the slag was reduced to 2.9%, and the obtained lead-tin alloy and electric fur...

Embodiment 2

[0032] Example 2: Mix materials containing 40% Pb and 30% Sn with quartz stone and limestone, mix the ingredients according to the silicic acidity of the slag as 1, mix them uniformly and make them into granules, and put them into the double-zone molten pool smelting furnace from above. Air containing 40% oxygen is blown into the oxidation tuyere above, the tuyere pressure is controlled at 0.15Mpa, the material gradually melts and falls, and pulverized coal is introduced into the reduction tuyere, the pressure of the reduction tuyere is 0.13Mpa, and the melting temperature is kept at 1280°C. Minutes later, open the siphon discharge port to release the lead-tin metal, then open the slag port to let the slag flow into the reducing electric furnace, add coke as the reducing agent in the electric furnace, control the voltage to 120V, the current to 5000A, and the temperature to 1450°C for 3 Hours later, the content of lead and tin in the slag was reduced to 2.5%, and the obtained l...

Embodiment 3

[0033] Embodiment 3: Mix the material containing Pb10%, Sn25% with quartz stone and limestone, mix according to the silicic acidity of the slag to 1.1, mix evenly and make it into granular form, put it into the double-zone melting pool melting furnace from above, and put it into the furnace body Air containing 30% oxygen is blown into the oxidation tuyere above, the tuyere pressure is controlled at 0.1Mpa, the material gradually melts and falls, and pulverized coal is introduced into the reduction tuyere, the pressure of the reduction tuyere is 0.09Mpa, and the melting temperature is kept at 1180°C. Minutes later, open the siphon discharge port to release the lead-tin metal, then open the slag port to let the slag flow into the reduction electric furnace, add coke as the reducing agent in the electric furnace, control the voltage to 110V, the current to 4000A, the temperature to 1350°C, and smelt for 4 minutes. Hours later, the content of lead and tin in the slag was reduced to...

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Abstract

The invention discloses a double-area molten pool smelting furnace and a lead and tin co-smelting smelting method of the furnace thereof. The smelting furnace comprises a furnace body and a molten pool; the molten pool is arranged on the lower portion of the furnace body, a smoke cover and a feeding opening are arranged on the upper portion of the furnace body, a siphoning discharging opening is formed in the bottom of the molten pool, a slag discharging opening is formed in the side face, a material blocking plate is arranged on the furnace body, oxidation air openings are formed below the material blocking plate, and reduction air openings are formed in the molten pool; and the smelting method comprises the working procedures of material mixing, double-area molten pool smelting, impurity removal, smoke and dust recycling, furnace slag electric furnace reduction and fuming and volatilization. The furnace and method have the beneficial effects of being sufficient in combustion, high in heat efficiency, high in metal recycling rate, small in smoke and dust generation amount, easy to operate, affordable, little in fugitive emission, comprehensive in resource utilization, energy-saving, consumption-reducing and the like.

Description

technical field [0001] The invention belongs to the technical field of tin and lead smelting in the nonferrous metal smelting industry, and specifically relates to a device and a method for directly smelting lead and tin by using a double-zone melting pool melting furnace in the lead and tin smelting process. Background technique [0002] At present, in the non-ferrous metal smelting industry, tin and lead are generally smelted separately, but lead is often associated with tin ore, and it is difficult to completely separate it through beneficiation. Tin smelting generally uses reverberatory furnaces, blast furnaces, electric furnaces, Osmelt furnaces, etc. for reduction smelting, and then removes impurities such as lead and arsenic by vacuum furnaces and crystallizers. In the lead smelting industry, oxidation smelting is used to obtain high-lead slag, which then flows into a furnace with a reducing atmosphere to reduce lead oxide to metallic lead. For example, the Shuikoush...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02C22B25/02C22B5/12F27B14/04F27B14/08
CPCC22B5/12C22B13/02C22B25/02F27B14/04F27B14/08Y02P10/20
Inventor 谭绪云李晓斌
Owner 云南国傲环境科技集团有限公司