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Method for preparing cementing material by using copper slag and steel slag as raw materials

A technology for cementitious material and copper slag is applied in the field of joint preparation of cementitious material from copper pyrometallurgical slag and converter steel slag, and can solve the problems of low hydration activity of copper slag, excessive silicate difference, and limited application of steel slag, etc. To achieve the effect of solving the problem of slag accumulation, reducing the amount of addition, good economic and environmental benefits

Inactive Publication Date: 2019-01-11
LONGYAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high iron content and low calcium content in copper slag, the hydration activity of copper slag is low, which greatly limits its application in new cementitious materials.
The three major elements Ca, Si, and Al in steel slag are relatively low, and the total amount of silicates formed is too different from cement clinker, which also limits the further application of steel slag in the field of cementitious materials

Method used

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  • Method for preparing cementing material by using copper slag and steel slag as raw materials
  • Method for preparing cementing material by using copper slag and steel slag as raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 Shown, a kind of method for raw material preparation cementitious material with copper slag and steel slag, comprises the steps:

[0030] A. Copper slag activation. Take copper slag, reducing agent, and calcium oxide and mix them evenly, and reduce and smelt at 1300 ° C for 2 hours; the reducing agent is activated carbon, and the amount added is 20% of the mass of copper slag; the amount of calcium oxide added is 10% of the mass of copper slag; The obtained melt is directly cooled by water quenching, and then ground to less than 200 mesh P by ball milling 80 , and then under the condition that the magnetic induction intensity is 100mT, the iron concentrate is recovered by magnetic separation, and the tailings of the magnetic separation are activated copper slag, which is ready for use. Iron concentrate grade 65.5%.

[0031] B. Steel slag activation. Steel slag is ground to less than 200 mesh P 70 , under the condition of magnetic induction intensity o...

Embodiment 2

[0034] like figure 1 Shown, a kind of method for raw material preparation cementitious material with copper slag and steel slag, comprises the steps:

[0035] A. Copper slag activation. Take copper slag, reducing agent, and calcium oxide, mix them evenly, and reduce and smelt at 1500°C for 1 hour. In this embodiment, the reducing agent is activated carbon, its addition is 10% of the mass of copper slag, and the amount of calcium oxide is 20% of the mass of copper slag; the melt is ground to less than 200 mesh P 80 , and then under the condition that the magnetic induction intensity is 200mT, the iron concentrate is recovered by magnetic separation, the iron concentrate grade is 63.9%, and the magnetic separation tailings are activated copper slag, which is ready for use.

[0036] B. Steel slag activation. Steel slag is ground to less than 200 mesh P 70 , under the condition of magnetic induction intensity of 200mT, magnetic separation iron concentrate, iron concentrate gra...

Embodiment 3

[0039] like figure 1 Shown, a kind of method for raw material preparation cementitious material with copper slag and steel slag, comprises the steps:

[0040] A. Copper slag activation. Take copper slag, reducing agent, and calcium oxide, mix them evenly, and reduce and smelt at 1150°C for 3 hours. In this embodiment, the reducing agent is activated carbon, the amount added is 30% of the mass of copper slag, and the amount of calcium oxide is 5% of the mass of copper slag; the molten body is ground to less than 200 mesh P80 , and then recover iron ore concentrate by magnetic separation under the condition of magnetic induction intensity of 80mT, the grade of iron ore concentrate is 66.4%. The tailings of magnetic separation are activated copper slag, which is used as cementing raw material for future use.

[0041] B. Steel slag activation. Steel slag is ground to less than 200 mesh P 70 , Under the condition of magnetic induction intensity of 80mT, the iron concentrate is ...

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Abstract

The invention discloses a method for preparing a cementing material by using copper slag and steel slag as raw materials, comprising the following steps: slag activation of copper slag and steel slagis carried out; the cementing material is prepared by using the activated copper slag and the activated steel slag obtained in the S1 as raw materials. The cementing material is mainly prepared from the following ingredients (by weight): 30%-70% of activated copper slag, 20%-50% of activated steel slag, and 10-20% of an alkaline activator. By the slag activation and valuable metal recovery coupling technology, high-grade iron ore concentrate is recovered, and activated slag for preparing the novel cementing material is also obtained. Comprehensive utilization of smelting waste is realized, theslag storage problem is thoroughly solved, and various performance indexes of the cementing material are good.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of industrial waste slag, in particular to a method for jointly preparing cementitious materials from copper pyrometallurgical smelting slag and converter steel slag. Background technique [0002] Copper smelting slag is the residue left after copper concentrate is smelted and processed, referred to as copper slag. Copper slag is mainly composed of iron, silicon, calcium, magnesium, aluminum and a small amount of zinc, manganese, phosphorus and other oxides, mainly fayalite (containing FeSiO 4 Up to 90%) and a small amount of vitreous, magnetite and sulfide exist. In the process of pyrometallurgy, the production of 1 ton of refined copper will generate about 2-3 times the amount of copper slag. The accumulation of a large amount of copper slag not only occupies land resources, but also causes a waste of valuable resources. At the same time, various alkaline heavy metals contained in the ...

Claims

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Application Information

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IPC IPC(8): C04B7/153C04B12/00
CPCC04B7/153C04B12/005Y02P40/10
Inventor 朱茂兰陈杭邱廷省王俊娥欧阳青海陈晰傅皓柯高浩菡胡志彪童长青张丽娜
Owner LONGYAN UNIV
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