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Fume gasification of lead anode slime smelting and recovery process with graded temperature control

A lead anode slime smelting, gasification and classification technology, applied in the field of lead anode slime smelting smoke dust gasification classification temperature control recovery process, can solve the problems of high investment cost and large gas volume

Active Publication Date: 2017-11-21
CHENGDU INTERMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process is only for the treatment of lead anode slime smelting furnace gas, which means that manufacturers must change their current furnace gas purification process and equipment (mainly bag filter), and because the lead anode slime smelting furnace gas volume is generally large , the investment cost of implementing the furnace gas classification temperature control dust collection and purification process is high

Method used

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  • Fume gasification of lead anode slime smelting and recovery process with graded temperature control
  • Fume gasification of lead anode slime smelting and recovery process with graded temperature control
  • Fume gasification of lead anode slime smelting and recovery process with graded temperature control

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] use figure 1 In the lead anode slime smelting flue dust gasification staged temperature-controlled recovery process shown, the temperature of the gasifier is 750°C, Ar gas is used for gasification, the furnace gas outlet temperature of the first-stage temperature-controlled cooling unit 211 is 400°C, The furnace gas outlet temperature of the temperature-controlled cooling unit 212 is controlled to be 300°C, and the temperature of the third-stage temperature-controlled cooling unit 213 is controlled to be 110°C. The test results are: the residual substance in the gasifier 100 is mainly Sb 2 o 3 , the weight of the residual substance is 45% of the raw material weight of lead anode slime smelting flue dust, and the residual substance contains 0.35% (weight) of arsenic; the first dust contains 0.96% (weight) of arsenic, and the weight of the first dust is about 30% of the weight of the soot raw material; the second dust contains 2.5% (weight) of arsenic, and the collected...

Embodiment 2

[0032] use Figure 4 In the lead anode slime smelting flue dust gasification staged temperature-controlled recovery process shown, the temperature of the gasifier is 750°C, Ar gas is used for gasification, the furnace gas outlet temperature of the first-stage temperature-controlled cooling unit 211 is 400°C, The furnace gas outlet temperature of the temperature-controlled cooling unit 212 is controlled to be 120°C. The test results are: the residual substance in the gasifier 100 is mainly Sb 2 o 3 , the weight of the residual substance is 48% of the raw material weight of lead anode slime smelting flue dust, and the residual substance contains 0.3% (weight) of arsenic; the first dust contains 0.93% (weight) of arsenic, and the weight of the first dust is about 28% of the weight of the soot raw material; the second dust contains 55% (weight) of arsenic, and the collected second dust is 20% of the weight of the lead anode slime smelting soot raw material.

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Abstract

The invention discloses a lead anodic slime smelting dust gasification and hierarchical temperature-control recovery process. The process includes the steps that 1, recovered lead anodic slime smelting dust is loaded into a gasification furnace, inert gas is introduced into the gasification furnace so that the lead anodic slime smelting dust can be heated to 600-900 DEG C for gasification under the inert gas atmosphere, and then two kinds of gaseous matter furnace gas to be recovered at different condensation temperatures are introduced into a furnace gas hierarchical temperature-control dust collection and purification device, wherein the gaseous matter contains antimonous oxide and arsenic trioxide; 2, the furnace gas is introduced in a first-stage temperature-control cooling unit; 3, furnace gas exhausted from the first-stage temperature-control cooling unit and carrying first dust is introduced into a first-stage gas filtering unit; 4, furnace gas exhausted from the first-stage gas filtering unit is introduced into a second-stage temperature-control cooling unit; 5, furnace gas exhausted from the second-stage temperature-control cooling unit and carrying second dust is introduced into a second-stage gas filtering unit to be dedusted and purified, and accordingly second dust is collected.

Description

technical field [0001] The invention relates to a recovery process of lead anode slime smelting flue dust gasification graded temperature control. Background technique [0002] Lead anode slime smelting furnace gas (lead anode slime is a by-product produced in the process of lead electrolytic refining. At present, the valuables in it are mainly recovered through the pyroprocessing process. During the treatment, the lead anode slime needs to be smelted to generate furnace gas) The main components are arsenic trioxide, antimony trioxide, and contain a small amount of lead oxide, etc., and the furnace gas has a higher content of antimony and arsenic in the flue dust obtained after cooling and dust collection (it should be emphasized that the said "lead anode slime smelting flue dust" in the present invention ", refers to the solid matter obtained after cooling and collecting dust from the lead anode slime smelting furnace gas, generally containing 75-85% by weight of antimony a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B30/02C22B30/04
Inventor 高麟汪涛张祥剑王钟辉曾伍祥唐勇
Owner CHENGDU INTERMENT TECH