Continuous fuming production process

Abstract

The invention discloses a continuous fuming production process. The process comprises one or more functional molten pools to form a continuous fuming furnace, the continuous fuming furnace is used forfuming production; the structure of the functional molten pools is similar to each other, the slag lines depth of the molten pools is more than 1.0 m, slag-immersed burners are arranged at the periphery of the side wall of the function molten pools, nozzles are located below the slag lines, the molten-state or cold-state-containing metallurgical material is directly added or added after being pretreated into the functional molten pools, the atmosphere in the molten pools and the metallurgical chemical reaction process are controlled through the combustion of the slag-immersed burners and strong stirring action, the materials are heated, melted, vulcanized, oxidized, reduced and fumed, in the fuming furnace, valuable metals are discharged from the melt body along with flue gas to form smoke dust and then enter a waste heat recovery and dust collection system, waste heat is recycled by the waste heat boiler, and enrichment and recovery of various valuable metals in the materials are realized through dust collecting. According to the continuous fuming production process, the production efficiency is improved, the production environment is improved, the labor intensity is reduced, andthe economic benefit is very remarkable.

Description

technical field [0001] The invention belongs to the field of nonferrous metal smelting and relates to a continuous fuming production process. Background technique [0002] The fuming furnace fuming method treats materials containing various valuable metals such as lead, zinc, tin, antimony, indium, germanium, etc., in the fuming furnace, the combustion of fuel generates high temperature and melts the materials containing valuable metals. Under different oxidizing or reducing atmospheres, valuable metals escape from the material in different forms such as steam, oxides or sulfides, and are finally collected in the form of dust in the dust collection system, thereby realizing the enrichment and recovery of valuable metals production process. The fuming furnace fuming method is a relatively mature process with obvious economic and environmental benefits, and has been widely used in industry. The traditional fuming furnace is periodically intermittently operated, and feeding-h...

AI Technical Summary

Problems solved by technology

However, most of these continuous fuming processes use tunnel-type fuming furnaces, which have not been technically and economically successful due to many problems such as high energy consumption and high cost.

[0004] At present, the main problems of the above-mentioned continuous fuming process are as follows: 1) In the case of the same productivity as that of batch operation, the metal content in the waste slag is far below the level usually required; 2) It cannot maintain stable operation when the raw material changes Effect; 3) In order to prevent the reflux of liquid slag, a partition wall needs to be installed. Under the condition of ensuring the same productivity, the cross-sectional area of ​​the tuyere area of ​​the fuming furnace needs to be expanded to 3-4 times that of the intermittent operation fuming furnace, which increases the cost of construction and maintenance ;4) From the point of view of practical operation, when the processing capacity is not large enough, the slag flow rate per unit time during continuous feeding and discharge is too small, and the chute is inconvenient to take care of

Since these forms of continuous fuming process have not shown sufficient advantages, they are still in the stage of semi-industrial trials

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