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Method for recycling valuable components from mixed slag containing nickel and iron

A technology for ferroalloy slag and slag, which is applied in the field of slag metallurgy to achieve the effect of recycling and solving pollution problems

Inactive Publication Date: 2018-02-06
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to process molten lead slag, molten blast furnace slag, molten steel slag, molten ferroalloy slag, and nickel smelting slag simultaneously on a large scale to solve environmental pollution problems and realize simultaneous separation and production of copper and iron?

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0219] A method for recovering valuable components from mixed slag containing nickel and iron, comprising the following steps:

[0220] Step 1, slag mixing: put the molten nickel smelting slag obtained from the slag outlet of the smelting furnace in the "matte-making process" process and the slag outlet in the blowing furnace in the "copper matte converting" process into the DC electric arc furnace, and at the same time add the cold high Slag, VOD / VAD slag and ferroalloy slag produced by smelting carbon ferromanganese, liquid high-lead slag reduction furnace lead-containing smelting slag, forming mixed slag; heating the mixed slag to a molten state, forming a reaction of copper and iron The reaction slag is electromagnetically stirred to realize natural mixing; the reaction slag is monitored in real time, and the two parameters (a) and (b) are ensured at the same time through regulation to obtain the slag after the reaction is completed; corresponding to (a): containing The te...

Embodiment 2

[0225] A method for recovering valuable components from mixed slag containing nickel and iron, comprising the following steps:

[0226] Step 1, slag mixing: combine the molten nickel smelting slag obtained from the slag outlet of the smelting furnace of the "matte-making process" process with the molten nickel smelting slag obtained from the slag outlet of the "copper matte converting" process through the slag outlet of the depletion furnace Add pourable smelting reaction slag tank, and at the same time add ferroalloy slag produced by molten ferrochromium smelting obtained from the slag outlet to form mixed slag; use oxygen-enriched air to blow natural gas, anthracite and coke particles with a particle size of 20mm, and The mixed slag is heated to a molten state to form a reaction slag containing copper and iron, and the reaction slag is electromagnetically stirred to achieve mixing; the reaction slag is monitored in real time, and the two parameters (a) and (b) are guaranteed ...

Embodiment 3

[0230] A method for recovering valuable components from mixed slag containing nickel and iron, comprising the following steps:

[0231]Step 1, slag mixing: the molten nickel smelting slag obtained from the slag outlet of the smelting furnace in the "matte-making process" process and the molten nickel smelting slag obtained from the smelting of the top-blown molten pool through the slag outlet of the sinking electric furnace are added to the DC electric arc furnace At the same time, steel slag obtained from the slag outlet of converter steelmaking is added to form mixed slag; with oxygen at a preheating temperature of 600°C, anthracite, coke particles and coal powder with a particle size of 20mm are injected to heat the mixed slag to a molten state , form the reaction slag containing copper and iron, and make the slag mix; monitor the slag in real time, and ensure the two parameters (a) and (b) at the same time through regulation, and obtain the slag after the reaction; correspo...

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Abstract

The invention relates to a method for recycling valuable components from mixed slag containing nickel and iron. The method comprises the following steps: S1, mixing slag, namely adding nickel smeltingslag into a smelting reaction device, and adding one or more of lead smelting slag, blast furnace slag, steel slag and iron alloy slag, thus forming mixed slag; heating the mixed slag to be in a smelting state to be taken as reaction slag, mixing uniformly, monitoring the reaction slag in real time, and meanwhile, regulating to enable the mixed slag containing nickel and iron to meet conditions aand b simultaneously, thus obtaining the reacted slag; and S2, separating for recycling. According to the method, the mixed slag containing nickel and iron can be treated efficiently, so that the problems that a great amount of slag is accumulated to result in environment pollution and heavy metal pollution are solved, and the heavy metal components can be recycled.

Description

technical field [0001] The invention belongs to the technical field of slag metallurgy, in particular to a method for recovering valuable components from mixed slag containing nickel and iron. Background technique [0002] During the nickel pyro-smelting process, a large amount of nickel smelting slag is produced. The nickel smelting slag includes the nickel smelting slag produced by the "matte smelting" process, the depleted slag produced by the "copper matte nickel blowing" process, and the top-blown smelting process. The nickel precipitated slag. my country's Jinchuan Company adopts "flash smelting" and "top blowing smelting" for nickel concentrate smelting, and produces 1 million tons of nickel smelting slag every year, and the accumulated storage capacity currently exceeds 10 million tons. Copper, iron, nickel, cobalt, zinc, lead, gold, silver and other valuable components in nickel smelting slag are piled up for a long time, which not only wastes resources but also po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B23/02
CPCC22B7/001C22B7/04C22B23/023C22B23/025Y02P10/20
Inventor 张力张武
Owner NORTHEASTERN UNIV
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