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Lead concentrate processing technology

A treatment process and lead concentrate technology, applied in the field of lead concentrate treatment process, can solve the problems of ineffective separation of smoke and dust, difficulty in recycling and reuse of smoke and dust, and achieve the effects of saving equipment investment, strong adaptability, and shortening the process flow

Active Publication Date: 2017-06-27
呼伦贝尔驰宏矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The recovery rate of crude lead in this process is >97.5wt%, silver is added to crude lead>96.5wt%, the final slag contains less than 1wt% lead, and 2 The concentration gradually decreases, and at the end of smelting, the flue gas SO 2 The concentration is too low, which brings challenges to the tail gas acid production system, and the recovery and reuse of soot is extremely difficult

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: a kind of lead concentrate processing technology, it comprises following stages: 1) oxidation smelting stage; 2) reduction smelting I stage; 3) reduction smelting II stage, wherein:

[0032] 1) Oxidation smelting stage: 10-20t / h of lead concentrate with a lead content ≥ 45wt% is mixed with limestone and quartz sand for granulation, and then continuously added to the Ausmelt furnace, and 800-3000Nm of oxygen is injected into the Ausmelt furnace 3 / h, air 7000~15000Nm 3 / h, pulverized coal 0.5-1t / h, maintain oxygen-enriched concentration: 29-31v%, control molten pool temperature 1050-1150°C, carry out oxidation smelting, when the amount of material entering the furnace reaches 180t, and the slag contains 35-42wt% lead , 1) the oxidation smelting stage is completed;

[0033] 2) Stage I of reduction smelting: Add lead concentrate and lump coal into the Ausmelt furnace that has completed 1) oxidation smelting stage, wherein the input amount of lead concentrate ...

Embodiment 2

[0041] Embodiment 2: a kind of lead concentrate processing technology, it comprises the following stages: 1) oxidation smelting stage; 2) reduction smelting I stage; 3) reduction smelting II stage, wherein:

[0042] 1) Oxidation smelting stage: 10-20t / h lead concentrate, lead fume ≤ 10t / h (lead content ≥ 45wt% after mixing) mixed with limestone and quartz sand and granulated continuously into the Ausmelt furnace, then poured into the Ausmelt furnace Spray oxygen 800~3000Nm 3 / h, air 7000~15000Nm 3 / h, pulverized coal 0.5~1t / h, keep the oxygen-enriched concentration: 29~31v%, control the molten pool temperature 1050~1150℃, carry out oxidation smelting, when the amount of material fed into the furnace reaches the rated amount and the lead content in the slag is 35~ 42wt%, 1) the oxidation smelting stage is completed;

[0043] 2) Stage I of reduction smelting: Add lead concentrate and lump coal into the Ausmelt furnace that has completed 1) oxidation smelting stage, wherein the...

Embodiment 3

[0053] Embodiment 3: as figure 1 A kind of lead concentrate treatment process shown, it comprises the following stages: 1) oxidation smelting stage; 2) reduction smelting I stage; 3) reduction smelting II stage, wherein:

[0054] 1) Oxidation smelting stage: Mix and granulate lead-containing materials with a lead content ≥ 45wt% with limestone and quartz sand, then continuously add them into the Ausmelt furnace, and inject 800-3000Nm of oxygen into the Ausmelt furnace 3 / h, air 7000~15000Nm 3 / h, pulverized coal 0.5~1t / h, keep the oxygen-enriched concentration: 29~31v%, control the molten pool temperature 1050~1150℃, carry out oxidation smelting, when the amount of material fed into the furnace reaches the rated amount and the lead content in the slag is 35~ 42wt%, 1) the oxidation smelting stage is completed;

[0055] 2) Stage I of reduction smelting: Add lead concentrate and lump coal into the Ausmelt furnace that has completed 1) oxidation smelting stage, wherein the inpu...

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Abstract

The invention discloses a lead concentrate processing technology. The lead concentrate processing technology comprises an oxidization smelting step carried out in an Ausmelt furnace, a reduction smelting step I, a reduction smelting section II, and a fuming step carried out in a fuming furnace. The lead concentrate processing technology is high in raw material adaptability, and simple in material preparation process; after the mixture is pelletized and fed into the furnace, the quantity of powder dust taken away by the fume discharged from the furnace can be obviously decreased, and as a result, the fume dust rate can be reduced; a traditional lead sintering process is removed, so that the low-level pollution caused by powder dust and SO2 fume can be removed, and as a result, the operation environment can be effectively improved; the Ausmelt furnace used for lead smelting and fuming furnace for fuming are combined, so that the technological processes are reduced; the equipment investment is saved; the energy consumption is low; and the lead recovery rate is high; in addition, furnace bodies used in the technology are sealed, so that the fume leakage is small, and as a result, the working environment is optimized; the fume produced in the smelting step and the fuming step can be effectively separated; as the fume in the Ausmelt furnace and the fume in the fuming furnace are mixed, and the SO2 content can reach the acid making requirement, and thus a good condition is provided to the acid making technology.

Description

[0001] Technical field: [0002] The invention relates to a treatment process, in particular to a lead concentrate treatment process. [0003] Background technique: [0004] Pyrochemical treatment of lead mainly includes sintering-blast furnace smelting and direct smelting, among which direct smelting includes oxygen bottom blowing smelting (SKS)-blast furnace reduction, submerged top blowing (ISA or Ausmelt) smelting-blast furnace reduction , Oxygen top-blown Kaldo (Kaldo) converter method, oxygen bottom-blown (QSL) method and Kivcet (Kivcet) method. The traditional sintering-blast furnace smelting method due to the SO in the sintering flue gas of lead concentrate 2 The low concentration has caused great difficulties in making acid, which not only damages the health of workers and nearby residents, but also causes serious damage to the ecological environment around the factory. The country has explicitly eliminated the backward sintering-blast furnace smelting process. The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B13/02
CPCC22B13/02Y02P10/20
Inventor 马雁鸿陈鹏朱海成孟庆宇刘启忠罗恒石磊张志国夏忠和徐学鸥刘黎波罗志丹邓伟梁艳辉伍贺东
Owner 呼伦贝尔驰宏矿业有限公司
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