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Single-step metallurgical flash furnace and metallurgical method

A flash furnace and metal ore technology, applied in electric furnaces, crucible furnaces, rotary drum furnaces, etc., can solve the problems of difficult slag discharge, high iron content in products, complex process flow, etc., to achieve low production costs and comprehensive recovery. Exploiting, wide-ranging effects

Active Publication Date: 2016-07-27
TIANJIN FLASH IRONMAKING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to propose a flash furnace for one-step metallurgy, which can solve the problem of slag containing metal to be smelted and Fe in the one-step smelting process of copper sulfide ore, nickel sulfide ore, and lead sulfide ore in an energy-saving and environment-friendly way. 3 o 4 High, difficult slag discharge, high iron content in the product, high energy consumption, complex process, etc.

Method used

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  • Single-step metallurgical flash furnace and metallurgical method
  • Single-step metallurgical flash furnace and metallurgical method
  • Single-step metallurgical flash furnace and metallurgical method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The flash furnace of embodiment 1 one-step metallurgy

[0035] A flash furnace for one-step metallurgy, comprising a reaction tower 1, a nozzle 2 is arranged on the top of the reaction tower 1; one end of the molten pool 5 is connected to the lower part of the reaction tower 1, and an ascending flue 10 is arranged above the other end of the molten pool 5; the reaction tower 1 The lower part is equipped with a gas introduction device 3 for introducing reducing gas, which contains CO and H 2 . The reducing gas forms a reducing gas cushion 4 in the lower part of the reaction tower 1 and the upper space of the molten pool 5 . A retaining wall 6 is provided at the joint between the molten pool 5 and the reaction tower 1 . A number of spray guns 9 are arranged on the upper part of the melting pool 5 , on the side and on the ascending flue 10 .

Embodiment 2

[0036] Embodiment 2 Utilizes the method for one-step copper smelting in the flash furnace of embodiment 1

[0037] 1. Preparation of raw materials and auxiliary materials

[0038] The raw material used in this embodiment is a kind of imported copper concentrate, and the main components are as follows:

[0039] Element

Cu

S

Fe

SiO 2

CaO+MgO

％

29.5

31

26

6

1

[0040] The raw material is dried and bulked into a dry concentrate with a water content below 0.3% and a particle size below 200 mesh, accounting for 80%.

[0041] Flux is SiO 2 For quartz powder with a content of more than 90%, 90% of the quartz powder has a water content of less than 1% and a particle size of less than 60 mesh. Here, the quartz powder is used as a flux to participate in the slagging process of flash smelting.

[0042] The cold material is one or more of soot, slag, raw ore, and wet leaching slag containing valuable metals such as gold, sil...

Embodiment 3

[0071] Embodiment 3 Utilize the method for the flash furnace of embodiment 1 to smelt nickel-copper crude alloy in one step

[0072] 1. Preparation of raw materials, fuels and auxiliary materials

[0073] The raw material is nickel concentrate, which mainly contains nickel and copper. The mass ratio of nickel and copper is usually between 1.5 and 2.5. In addition, it also contains cobalt and a small amount of gold, silver and platinum group metals. The composition of the nickel concentrate that present embodiment adopts is as follows:

[0074] Element

Ni

Cu

co

Fe

S

SiO 2

CaO

MgO

％

6.6

2.8

0.3

39.5

27.3

8.2

1.2

6

[0075] The raw material is dried and bulked into a dry concentrate with a water content below 0.3% and a particle size below 200 mesh, accounting for 80%.

[0076] Flux is SiO 2 For quartz powder with a content of more than 90%, 90% of the quartz powder has a water content of le...

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Abstract

The invention provides a single-step metallurgical flash furnace. The single-step metallurgical flash furnace comprises a reaction tower, and a spraying nozzle is arranged at the top of the reaction tower; the lower portion of the reaction tower is connected with one end of a molten pool, and a rising flue is arranged above the other end of the molten pool; and a gas guide-in device is arranged at the lower half portion of the reaction tower and used for guiding in reducing gas, and a reducing gas cushion layer is formed in space at the lower portion of the reaction tower. By means of the single-step metallurgical flash furnace, to-be-smelted metallic oxide and Fe3O4 in mineral are almost reduced into metal and FeO completely through the arrangement of the reducing gas cushion layer, the amount of to-be-smelted metal in slag is extremely low, the character of the furnace slag is improved, the viscidity of the furnace slag is reduced, and discharging is facilitated.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a one-step metallurgical flash furnace and a one-step metallurgical method. Background technique [0002] In the field of metallurgy, the production of crude metal from sulfide metal concentrate generally requires two steps, namely smelting-blowing. The traditional method is to separate smelting and blowing in different devices, such as molten pool smelting + PS converter blowing. smelting, flash smelting + flash blowing, etc., these traditional processes have long process, high energy consumption and SO 2 Low-altitude pollution of flue gas and other issues. Therefore, some people claim to complete the whole smelting process from metal concentrate to crude metal output in one metallurgical device, that is, one-step smelting method, and some industrialization attempts have been made: [0003] In the field of copper sulfide ore smelting, the Olympic Dam smelter in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B5/12C22B15/00C22B23/02C22B13/02
CPCC22B5/12C22B13/02C22B15/0047C22B23/02
Inventor 李效东夏明邱江波黄小兵
Owner TIANJIN FLASH IRONMAKING TECH CO LTD
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