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Floatation method to recycle nickel and copper metals from electric furnace nickel slag

A technology of electric furnace nickel slag and nickel copper, which is applied in the field of metallurgy, can solve problems such as industrialization difficulties, waste of metal resources, and low iron prices, and achieve good economic and social benefits, low chemical cost, and convenient purchase

Active Publication Date: 2019-04-05
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of industry in recent years, the production of nickel slag has increased accordingly. If a large amount of nickel slag is not effectively utilized, it will not only occupy a large amount of land, waste metal resources, but also seriously pollute the environment.
[0003] At the characteristics of the composition of nickel slag, many studies have been carried out on the comprehensive utilization of nickel slag resources at home and abroad: nickel slag is used as building materials for underground filling cement and cement concrete aggregates, production building blocks and glass-ceramics, etc. The research and utilization of this aspect are relatively mature, and the reduction of nickel slag can be realized, but the valuable metals such as nickel, copper, iron, cobalt and so on contained in nickel slag have not been fully utilized and recovered.
[0004] In the process of recovering iron from nickel slag, iron concentrates containing more than 70% iron can be obtained through direct reduction of carbon-containing pellets-magnetic separation, but it is still in the experimental stage. Due to the high cost of smelting and fine grinding, Iron price is low, industrialization is difficult

Method used

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  • Floatation method to recycle nickel and copper metals from electric furnace nickel slag

Examples

Experimental program
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Effect test

Embodiment 1

[0020] The nickel slag samples were taken from an old nickel slag mountain that had been stored for many years. The nickel slag contained 0.47% nickel and 0.35% copper. The main chemical components of the nickel slag are shown in Table 1:

[0021] .

[0022] The main valuable metals in nickel slag are nickel, copper, and iron, but most of iron exists in the form of iron silicate, which is difficult to recover by flotation.

[0023] Adopt following process step of the present invention to process this nickel slag:

[0024] Grinding: crush the nickel slag sample to 2mm, mix it evenly, sample 800.0g, feed it into the rod mill, grind the nickel slag sample to -37μm to account for 80%, adjust the pulp concentration to 45%, and feed it into the flotation in the slot;

[0025] Fast flotation: Add 800g / t of water glass, 80g / t of copper sulfate, 100g / t of butyl xanthate, and 30g / t of pinitol oil to the flotation cell for fast flotation, and obtain 9.67% nickel and 8.05% copper Cop...

Embodiment 2

[0033] The nickel slag samples were taken from another old nickel slag mountain that had been stored for many years. The nickel slag contained 0.38% nickel and 0.39% copper. The main chemical components of the nickel slag are shown in Table 3:

[0034] .

[0035] Adopt following process step of the present invention to process this nickel slag:

[0036] Grinding: crush the nickel slag sample to 2mm, mix it evenly, sample 800.0g, feed it into the rod mill, grind the nickel slag sample to -37μm, accounting for 70%, adjust the pulp concentration to 45%, and feed it into the flotation in the slot;

[0037] Fast flotation: Add 800g / t of water glass, 75g / t of copper sulfate, 80g / t of butyl xanthate and 40g / t of pine alcohol oil to the flotation cell for fast flotation, and obtain 6.03% nickel and 7.46% copper Copper-nickel mixed concentrate I and tailings I;

[0038] Rough separation: add copper sulfate 40g / t, butyl xanthate 120g / t, terpineol oil 35g / t to the tailings I to carr...

Embodiment 3

[0045] A slag concentrator with a daily processing capacity of 3000 tons adopts the present invention to process a batch of nickel slag containing 0.40% nickel and 0.44% copper. The process steps are as follows:

[0046] Crushing and grinding: crush the nickel slag to less than 100mm, mix it evenly, feed it into a Φ5.8m×5.8m semi-autogenous mill for grinding, and combine the semi-autogenous mill discharge and Φ5.5m×9.5m ball mill, Classified by the cyclone, the cyclone settling sand returns to the ball mill to form a closed-circuit grinding, and the overflow of the cyclone -37μm accounts for 70% and enters the fast flotation operation;

[0047] Fast flotation: control the flotation concentration of 45%, add water glass 1000g / t, copper sulfate 70g / t, butyl xanthate 80g / t, terpineol oil 40g / t to the flotation cell for fast flotation, and get nickel-containing 5.34 %, copper-nickel mixed concentrate I and tailings I containing 7.70% copper;

[0048] Rough separation: add copper ...

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Abstract

The invention discloses a floatation method to recycle nickel and copper metals from electric furnace nickel slag, comprising the steps of grinding, quick floatation, roughing, double concentration, and double scavenging. Nickel slag is ground to 70-80% which is -37 mu m through ore grinding; floatation concentration is controlled to 40-45%; the conditioner water glass, activator copper sulfate, collecting agent butyl xanthate and foaming agent terpenic oil are added to carry out floatation; final copper-nickel mixed concentrate with higher than 4% of nickel and higher than 4% of copper can beattained. The whole process herein involves few devices; the process flow is simple; the treatment cost is low; field industrial production is easy to implement; the floatation method helps reduce and turn into wealth, the waste electric furnace nickel slag piled for many years, so that recycle of green economy is achieved, and good social benefit is generated; in addition, the floatation methodis applied to the new field of nickel slag domestically for the first time.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a flotation method for recovering nickel-copper metal from electric furnace nickel slag. Background technique [0002] Nickel slag is formed during the smelting process of nickel metal with FeO, SiO 2 、Al 2 o 3 , MgO, etc. as the main chemical composition of the melt formed after cooling the granulated slag, the slag contains Ni, Cu, Co and Fe and other valuable metals. With the rapid development of industry in recent years, the production of nickel slag has increased accordingly. If a large amount of nickel slag cannot be effectively utilized, it will not only occupy a large amount of land, waste metal resources, but also seriously pollute the environment. [0003] At the characteristics of the composition of nickel slag, many studies have been carried out on the comprehensive utilization of nickel slag resources at home and abroad: nickel slag is used as building materials f...

Claims

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Application Information

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IPC IPC(8): B03D1/02
CPCB03D1/025
Inventor 陈志新苏晓晖张燕李德祥李琛李莉娜王春燕靳明阳罗春华方湘天李平德
Owner JINCHUAN GROUP LIMITED