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Method and device for preparing crude silver alloy through anode slime

A technology of anode slime and coarse silver, which is applied in the field of metallurgy, can solve the problems of high production cost, low thermal efficiency, and long process, and achieve the effects of low cost, good thermal efficiency, and reduced energy consumption

Active Publication Date: 2015-11-18
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, anthracite is used as reducing agent, diesel oil or natural gas is used as fuel, and after smelting in noble lead furnace, it is smelted in silver separating furnace after hot charging. The thermal efficiency is low, the production cost is high, the investment is high, and the process is long.

Method used

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  • Method and device for preparing crude silver alloy through anode slime
  • Method and device for preparing crude silver alloy through anode slime
  • Method and device for preparing crude silver alloy through anode slime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Bake 40t of anode slime (Pb15.0wt%, Sb40.0wt%, Ag5.0wt%) at 60°C to make anode slime, particle size Φ20mm, moisture 10%, and put it into the hopper for feeding.

[0045] (2) Add 10t of anode slime into the side-top composite smelting converter from the feed port, open the top spray gun of the side-top composite smelting converter, keep the furnace temperature at 700°C, and the anode slime is completely melted after 60 minutes; then, lift the top spray gun away Melt pool, start side blowing lance. Add the remaining 30t of anode slime evenly in 1 hour, and keep the air volume of the side blowing spray gun at 20000m 3 / h, wind pressure 3500Pa, oxygen concentration 30%. When melting, the furnace temperature rises to 1100°C, and the melting time is 6 hours.

[0046] (3) Control the air volume of the side blowing spray gun to 30000m 3 / h, wind pressure 4000Pa, oxygen enrichment concentration 45%, blowing time 4h, furnace temperature 1200℃, add 0.8t of soda ash for oxid...

Embodiment 2

[0050] (1) Bake 20t of anode slime (Pb20.0wt%, Sb30.0wt%, Ag15.0wt%) at 80°C to make anode slime, particle size Φ40mm, moisture 20%, put into the hopper for feeding.

[0051] (2) Put 5t of anode slime into the side-top composite smelting converter from the feed port, open the top spray gun of the side-top composite smelting converter, keep the furnace temperature at 900°C, and completely melt the anode slime after 20 minutes; then, lift the top spray gun away In the molten pool, start the side-blowing spray gun, and then add the remaining 15t of anode slime evenly in 40 minutes, and keep the air volume of the side-blowing spray gun at 18000m 3 / h, wind pressure 2400Pa, oxygen enrichment concentration 28%, raise the furnace temperature to 1300°C, and the melting time is 4h.

[0052] (3) Control the air volume of the side blowing spray gun to 15000m 3 / h, wind pressure 3000Pa, oxygen enrichment concentration 40%, blowing time 2h, furnace temperature 1300℃, add 0.6t of soda ash ...

Embodiment 3

[0056] (1) Bake 30t of anode slime (Pb18.0wt%, Sb35.0wt%, Ag10.0wt%) at 100°C to make anode slime, particle size Φ40mm, moisture 20%, put into the hopper for feeding.

[0057] (2) Add 10t of anode slime into the side-top composite smelting converter from the feed port, open the top spray gun of the side-top composite smelting converter, keep the furnace temperature at 800°C, and completely melt the anode slime after 30 minutes; then, lift the top spray gun away Melt pool, start side blowing lance. Add the remaining 20t of anode slime evenly in another 50 minutes, and keep the air volume of the side blowing spray gun at 18000m 3 / h, wind pressure 3000Pa, oxygen enrichment concentration 30%. When melting, the furnace temperature rises to 1200°C, and the melting time is 5 hours.

[0058] (3) Keep the air volume of the side blowing spray gun at 18000m 3 / h, wind pressure 3500Pa, oxygen enrichment concentration 43%, blowing time 3h, furnace temperature 1100℃, add 0.7t of soda as...

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Abstract

The invention discloses a method and device for preparing crude silver alloy through anode slime. According to the method for preparing crude silver alloy through anode slime, the anode slime is used as the raw material, and the crude silver alloy with the silver content being 80-95 wt% is obtained after the steps of pelletizing, charging and melting, slagging and emission, oxidizing slagging and crude silver alloy discharging. The device is a side-top-combined smelting converter which comprises a plurality of side blowing spray guns (1), a plurality of top blowing spray guns (2), a discharging opening (3), a feed inlet (4), a converter body (5), two rotating racks (6) and a smoke duct (7). According to the method for preparing the crude silver alloy through the anode slime, reduction smelting and oxidizing refining are finished through the side-top-combined smelting converter; compared with traditional two furnaces, the heat efficiency is good, energy consumption is lowered by 20-40%, and cost is reduced; smelting time is shortened to be within 4 days from 6.5 days, and the smelting efficiency is improved; the crude silver alloy can be prepared without additional reducing agents and flux, operation is simple and convenient, and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method and a device for preparing coarse silver alloy from anode slime. Background technique [0002] There are three main types of existing methods for producing crude silver alloys from anode slime: one is the all-wet process, which is copper anode slime→pressure leaching→chlorination leaching→alkali leaching→ammonia leaching for silver separation→coarse silver alloy, mainly It is used to treat anode slime with high gold content. This process has the disadvantages of long process, complicated process, difficult wastewater treatment, and high cost; the second is the (semi) wet method based on the wet method, which combines the fire method and the wet method. The process flow is anode slime → sulfate roasting → copper separation with dilute acid → gold separation with chloride → silver separation with sodium nitrate → coarse silver alloy; this process has a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00
CPCY02P10/20
Inventor 吴红林罗永光代龙果贾著红孙成余罗凌艳孙斯景曲洪涛单祖宇张候文王瑞山洪永明邹利明廖为新肖忠全李加平
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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