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Method for treating complex low-grade lead-antimony material by matching dual bottom-blowing furnaces

A low-grade and complex technology, applied in the direction of improving process efficiency, etc., can solve problems such as unclear control conditions of process technology, difficulty in discharging lead from siphon port of reduction furnace, and reduction of slagging times in reduction furnace, so as to increase comprehensive recovery profit, The effect of simple production operation process and strong adaptability of raw materials

Inactive Publication Date: 2018-08-17
蒙自矿冶科技开发有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early stage of production practice, due to unclear technical control conditions for this technology, foamy slag and liquid high-lead slag frequently appeared in the bottom blowing furnace and it was difficult to release it to the reduction furnace. Therefore, the reduction furnace was often in a low-load production state, resulting in siphoning of the reduction furnace It is difficult to export lead; the number of slagging in the reduction furnace is reduced, resulting in intermittent production of the fuming furnace, which greatly reduces the operation rate of the "three consecutive furnaces (bottom-blown oxidation furnace + bottom-blown reduction furnace + fuming furnace)" and greatly increases the production of the enterprise. cost

Method used

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  • Method for treating complex low-grade lead-antimony material by matching dual bottom-blowing furnaces
  • Method for treating complex low-grade lead-antimony material by matching dual bottom-blowing furnaces

Examples

Experimental program
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Effect test

Embodiment 1

[0019] like figure 1 As shown, a method for processing complex and low-grade lead and antimony materials by using a "double bottom blowing furnace", comprising the following steps:

[0020] The lead concentrate is treated and mixed with zinc leaching slag from hydrometallurgy, silver flotation silver-rich wet mud, lead-antimony ore, lead fume and limestone. Fraction 1.5%; Fe and SiO 2 The mass ratio is 1.3:1; CaO and SiO 2 The mass ratio is 0.3:1. The above mixture is continuously fed into the bottom-blown oxidation furnace after being granulated by the disc, and oxygen and nitrogen are continuously injected from the bottom of the bottom-blown oxidation furnace through the gas spray gun. The nitrogen plays the role of protecting the spray gun. Oxidative smelting is carried out at a high temperature of 1000-1100 °C, and the slag is discharged every 1.25 hours to obtain crude lead, flue gas and liquid high-lead slag. The produced flue gas is sent to the waste heat boiler to re...

Embodiment 2

[0023] like figure 1 As shown, a method for processing complex and low-grade lead and antimony materials by using a "double bottom blowing furnace", comprising the following steps:

[0024] The lead concentrate is processed and mixed with zinc leaching slag, lead-antimony ore, lead fume, and limestone. After batching, the mixture obtained: the mass fraction of Pb is 45%; 2 The mass ratio is 1.2:1; CaO and SiO 2 The mass ratio is 0.5:1. The above mixture is continuously fed into the bottom-blown oxidation furnace after being granulated by the disc, and oxygen and nitrogen are continuously injected from the bottom of the bottom-blown oxidation furnace through the gas spray gun. The nitrogen plays the role of protecting the spray gun. Oxidative smelting is carried out at a high temperature of 1000-1100 ℃, and the slag is discharged every 1.5 hours to obtain crude lead, flue gas and liquid high lead slag, respectively. Acid production, the tail gas of acid production is directly...

Embodiment 3

[0027] like figure 1 As shown, a method for processing complex and low-grade lead and antimony materials by using a "double bottom blowing furnace", comprising the following steps:

[0028] The lead concentrate is processed and mixed with zinc leaching slag from hydrometallurgy, silver flotation silver-rich wet mud, lead-antimony ore, lead fume and limestone. Fraction 4.0%; Fe and SiO 2 The mass ratio is 1.5:1; CaO and SiO 2 The mass ratio is 0.4:1. The above mixture is continuously fed into the bottom-blown oxidation furnace after being granulated by the disc, and oxygen and nitrogen are continuously injected from the bottom of the bottom-blown oxidation furnace through the gas spray gun. The nitrogen plays the role of protecting the spray gun. Oxidative smelting is carried out at a high temperature of 1000-1100 °C, and the slag is discharged every 1.4 hours to obtain crude lead, flue gas and liquid high-lead slag. The produced flue gas is sent to the waste heat boiler to r...

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Abstract

The invention discloses a method for treating a complex low-grade lead-antimony material by matching dual bottom-blowing furnaces. The method comprises the following steps of: (1) proportioning of complex low-grade lead-antimony material, lead concentrate and / or lead smoke dust and flux to be pelletized; (2) smelting in the bottom-blowing oxidizing furnace; (3) reducing in the bottom-blowing reducing furnace; and (4) volatilizing and smelting in a fuming furnace, specifically, a mixture obtained by proportioning comprises, by mass, greater than 40% of Pb and 1%-5% of Sb, a mass ratio of Fe toSiO2 is (1.2-1.6):1, and a mass ratio of CaO to SiO2 is (0.3-0.7):1. The method is used for treating the complex low-grade lead-antimony material by matching the dual bottom-blowing furnaces, and thethree continuous furnaces continuously and stably operate in the whole production and smelting process by strengthening batching, so that treatment capacity of the complex low-grade lead-antimony material is improved, and adaptability to raw materials is strong; and moreover, the yield of refined antimony can be increased, other valuable metal in the lead-antimony material is recycled more, comprehensive recycling profits are increased, and great significance is achieved for survival and development of enterprises.

Description

technical field [0001] The invention relates to the field of non-ferrous metallurgy, in particular to a method for processing complex and low-grade lead and antimony materials by using a "double bottom blowing furnace". Background technique [0002] Lead is an important basic raw material for the development of the national economy. The smelting method of lead can be simply summarized into two categories: traditional method and direct lead smelting method. The traditional method is sintering-blast furnace smelting method; the direct lead smelting method is a method in which the sintering process of lead sulfide concentrate is cancelled, and the raw concentrate is directly smelted in the furnace. The traditional sintering-blast furnace smelting method has been the main production method of lead for many years, but with the continuous improvement of human's awareness and requirements for environmental protection and energy saving, the shortcomings of the sintering-blast furna...

Claims

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Application Information

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IPC IPC(8): C22B13/02C22B30/02C22B15/00C22B11/02
CPCC22B11/02C22B13/02C22B15/0028C22B30/02Y02P10/20
Inventor 徐培伦沈江韩开远周忠跃冯继平
Owner 蒙自矿冶科技开发有限责任公司
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