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One-piece continuous two-stage smelting anode slime device and its smelting process

An anode slime, two-stage technology, which is applied in the field of an integrated continuous two-stage smelting anode slime device, can solve the problems of low oxygen concentration of the spray gun, short service life of the refractory material, complicated structure of the spray gun, etc., so as to reduce the production cost and prolong the use. Longevity and effect of improving processing efficiency

Active Publication Date: 2020-06-26
JIYUAN YUGUANG NONFERROUS METALLURGY DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, a large amount of soda ash is added to form sodium silicate alkali slag, which reduces the melting point of slag. At the same time, the addition of soda ash also reduces the melting point of refractory materials, and the life of refractory materials is short; Blowing spray gun, the pressure of the two rows of spray guns is different, the top blowing spray gun needs to be lifted repeatedly, the operation is complicated, the spray gun structure is complicated, the oxygen concentration of the spray gun is low, the exhaust gas volume is large, and the production cost is high

Method used

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  • One-piece continuous two-stage smelting anode slime device and its smelting process
  • One-piece continuous two-stage smelting anode slime device and its smelting process
  • One-piece continuous two-stage smelting anode slime device and its smelting process

Examples

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Effect test

specific Embodiment

[0046] A device for smelting anode slime in two stages with an integrated furnace, such as figure 1 , figure 2 , image 3 As shown, the device includes a feed bin 1, a first metering belt scale 2, a conveyor belt 3, a second metering belt scale 4, a cylindrical melting furnace 5, a speed reducer 6 and a supporting roller 7; There is a discharge port, the feeding end of the first metering belt scale is located below the discharge port of the silo, the feeding end of the first measuring belt scale is located above the feeding end of the conveyor belt, and the feeding end of the conveyor belt is connected to the Located above the feeding end of the second metering belt scale, the feeding end of the second metering belt scale is located above the feeding port of the cylindrical melting furnace, and a reducer 6 is arranged below the cylindrical melting furnace; There are two rollers 7, both of which are arranged under the cylindrical melting furnace and respectively arranged on ...

Embodiment 1

[0098] A device for smelting anode slime in two stages with an integrated furnace, such as figure 1 , figure 2 , image 3 As shown, the device includes a feed bin 1, a first metering belt scale 2, a conveyor belt 3, a second metering belt scale 4, a cylindrical melting furnace body of furnace 5, a speed reducer 6 and a supporting roller 7; The bottom of 1 is provided with a discharge port, the feeding end of the first weighing belt scale 2 is located below the discharge port of the silo, and the discharging end of the first measuring belt scale 2 is located above the feeding end of the conveyor belt 3, and the conveying The feeding end of the belt 3 is located above the feeding end of the second weighing belt scale 4, and the feeding end of the second weighing belt scale 4 is located above the feeding port 501 of the cylindrical melting furnace; A speed reducer 6 is arranged below the smelting furnace; there are two supporting rollers 7, both of which are arranged below the...

Embodiment 2

[0106] The anode slime treated in this example is lead anode slime, and the contents of each component in the anode slime are as follows: Pb: 15%, Sb: 35%, As: 5%, Bi: 2%, Cu: 3%, Te: 0.2 %, Au: 0.05%, Ag: 8%, H 2 O: 30%; the treated anode slime is fresh anode slime. All other raw materials are commercially available unless otherwise specified.

[0107] The process of smelting anode slime using the above-mentioned integrated continuous two-stage anode slime melting device, the process includes the following steps:

[0108] (1) Material preparation: prepare lead anode slime and anthracite with a particle size of 1-20 mm and place them in different silos for standby;

[0109] (2) Reduction slagging process:

[0110] a: There are 4 air-permeable bricks on the bottom wall of the cylindrical melting furnace. At the bottom of the cylindrical smelting furnace, gas nitrogen is introduced through the breathable bricks, and the amount of nitrogen introduced into each breathable bric...

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Abstract

The invention discloses an integrated furnace two-section type anode mud smelting device and a smelting process thereof. The anode mud smelting device comprises a bin, a first metering belt weigher, aconveying belt, a second metering belt weigher and a cylindrical smelting furnace. The smelting process comprises the steps of adding the anode mud and anthracite in the furnace through a charging hole of the cylindrical smelting furnace; carrying out reduction slagging under the conditions that the anode mud and the anthracite are heated in a pure oxygen combustion device, nitrogen is fed through air bricks on the bottom of the furnace, then the anode mud and the anthracite are stirred, and natural gas and oxygen are fed through a gas spray gun; after reduction slagging is finished, carryingout oxidizing refining under the atmosphere of oxygen and nitrogen so as to obtain gold-silver alloy of which the gold-silver alloy grade is greater than 96%. By two-section continuous smelting including reduction slagging and oxidizing refining, smelting treatment to the anode mud is finished, in a reduction slagging process, soda ash is not added, influences of sodium silicate slag type to thesmelting furnace are avoided, and the service life of the furnace is prolonged; and in the oxidizing refining process, by high-concentration oxygen oxidation treatment and nitrogen stirring, the amount of generated waste gas is small, energy consumption is low, and environmental protection is implemented.

Description

technical field [0001] The invention belongs to the technical field of metal recycling and smelting, and in particular relates to an integrated continuous two-stage anode slime melting device and a melting process thereof. [0002] technical background [0003] In the process of electrolytic refining of crude lead, the insoluble sludge attached to the surface of the residual anode or deposited on the bottom of the electrolytic tank is usually called lead anode slime, which contains gold, silver, antimony, bismuth, lead, copper, arsenic, etc. a high-value element. Therefore, lead anode slime is an important raw material for comprehensive recovery of gold, silver and other valuable metals, and about 70% of silver is extracted from lead anode slime. With the increasing shortage of non-ferrous metal rich ore, more and more attention has been paid to the comprehensive recovery of various valuable metal elements from secondary resources such as lead anode slime. In recent years, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B11/02
CPCC22B7/001C22B11/021
Inventor 刘素红王拥军袁永锋吴艳新汤伟
Owner JIYUAN YUGUANG NONFERROUS METALLURGY DESIGN & RES INST CO LTD
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