Method for manufacturing microlite from high-temperature ferronickel alloy waste slag

A technology of nickel-iron alloy and microcrystalline stone, which is applied in the field of ferroalloy waste slag reuse, can solve the problems of high difficulty in handling nickel-iron alloy waste slag, occupying land resources, and polluting the environment, so as to increase production income, save land resources, and lower investment costs. Effect

Active Publication Date: 2015-04-22
商都中建金马冶金化工有限公司
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  • Description
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  • Application Information

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Problems solved by technology

Usually metallurgical slag is processed and utilized as the main raw material for cement or to manufacture other building materials, but nickel-iron alloy waste slag contains more SiO 2 , MgO, especially the high content of MgO, which does not meet the requirements of cement admixtures. At present, the existing nickel-iron alloy waste slag treatment methods are mainly dumping

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) The nickel-iron alloy waste slag composition is:

[0025] Table 1 Nickel-iron alloy waste slag chemical composition (%)

[0026] chemical composition

SiO 2

MgO

FeO

Al 2 o 3

CaO

Cr 2 o 3

P 2 o 5

S

content

45～56

18～29

2～4

1～2

5～8

1.3

0.2

0.19

[0027] The composition of kaolin is:

[0028] Table 2 Kaolin chemical composition (%)

[0029] chemical composition

SiO 2

Al 2 o 3

Fe 2 o 3

TiO 2

content

≥50

45～48

≤0.25

≤0.20

[0030] 2) Production process operation of microcrystalline stone

[0031] (1) Preparation and preheating of additives

[0032] Kaolin is used as an additive, and the particle size of the kaolin is less than 0.5mm. The nickel-iron alloy waste residue liquid and the additive are weighed in a mass ratio of 85-90:10-15, and the weighed additive is heated to 1300°C-1400°C.

[0033] (2) H...

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PUM

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Abstract

The invention relates to a method for manufacturing microlite from high-temperature ferronickel alloy waste slag, belonging to the technical field of reutilization of alloy waste slag. The technical process mainly comprises the steps of preparation and preheating of an admixture, hot mix melting, water quenching and cooling, grinding, and crystallization. The method comprises the following steps: by using kaolin with the particle size of 0.5mm as kaolin, weighing an alloy waste slag solution and the admixture in a mass ratio of (85-90):(10-15), and heating the admixture to 1300-1400 DEG C; keeping the mix melting temperature at 1450-1500 DEG C for 30-45 minutes while stirring; cooling the molten slag by water quenching; and adding the water quenching slag into a ball mill, milling, filling the slag powder into a mold, sending into a crystallizing kiln or crystallizing tunnel, heating to 950-1000 DEG C, keeping the temperature to perform crystallizing treatment for 120-180 minutes, carrying out furnace cooling or slow cooling at the rate of 5-8 DEG C/minute, and finally, demolding to obtain the microlite finished product. By effectively utilizing the high-temperature ferronickel alloy waste slag for producing microlite, the method reduces the environmental pollution, conforms to the requirements for national clean production, and has the advantages of lower investment cost, reliable technology and obvious economic benefit of production.

Description

1. Technical field [0001] The invention relates to a method for using high-temperature nickel-iron alloy waste slag as a raw material to manufacture microcrystalline stone, and belongs to the technical field of ferroalloy waste slag reuse. 2. Background technology [0002] The smelting of ferronickel produces a large amount of metallurgical waste. Usually metallurgical slag is processed and utilized as the main raw material for cement or to manufacture other building materials, but nickel-iron alloy waste slag contains more SiO 2 , MgO, especially the high content of MgO, which does not meet the requirements of cement admixtures. At present, the existing nickel-iron alloy waste slag treatment methods are mainly dumping or burying, which not only occupies a large amount of land resources, but also pollutes the local environment. Unlike other metallurgical Compared with the treatment and utilization technology of waste slag, the treatment of nickel-iron alloy waste slag is mo...

Claims

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Application Information

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IPC IPC(8): C04B30/00C04B5/00
Inventor 刘日宏田鹏飞
Owner 商都中建金马冶金化工有限公司
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