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Ferro-nickel slag ceramic and preparation method thereof

A technology for preparing ceramics and ferronickel slag, which is applied in the field of comprehensive utilization of solid waste resources, can solve the problems of complicated preparation process of glass-ceramic, no relevant reports on the application research of ferronickel slag, and difficulty in realizing mass production, etc. Improved sintering and mechanical properties

Active Publication Date: 2018-04-20
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of glass-ceramics is complicated, the cost is high, and it is difficult to achieve mass production. The utilization of ferronickel slag is undoubtedly a drop in the bucket for the total amount of ferronickel slag.
[0009] At present, no relevant reports on the application of ferronickel slag in ceramic tiles have been found.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a ferronickel slag ceramic and a preparation method thereof, the preparation method comprising the following steps:

[0035] Step S11, mixing 10% of blast furnace nickel-iron slag, 10% of electric furnace nickel-iron slag, 10% of steel slag, 6% of quartz, and 64% of ordinary clay according to the mass percentage, and drying after wet grinding to obtain a mixture powder;

[0036] Step S12, after the mixture powder is sprayed with water, granulated and stale, then press-molded at 20-30MPa, and dried; after drying, the moisture content of the green body is <1%;

[0037] Step S13, sending the dried ceramic body into a ceramic kiln for firing, the optimum firing temperature is 1170° C., and the firing time is 30 minutes to obtain ferronickel slag ceramics.

[0038] The nickel-iron slag ceramic product provided in this example has a flexural strength of 109.20 MPa and a water absorption rate of 0.32%. It is an excellent ceramic material, and its cryst...

Embodiment 2

[0040] This embodiment provides a ferronickel slag ceramic and its preparation method. The preparation method of this embodiment is the same as the preparation method in Example 1. The difference is that the raw material ratio used is: blast furnace nickel Iron slag 25%, electric furnace nickel-iron slag 40%, common clay 35%; the firing temperature adopted is 1120°C, and the firing time is 30 minutes.

[0041] The ferronickel slag ceramic product provided in this embodiment has a flexural strength of 98.37 MPa and a water absorption rate of 0.32%. It is an excellent ceramic material, and its crystal phase contains olivine in addition to the traditional pyroxene and quartz phases.

Embodiment 3

[0043] This embodiment provides a ferronickel slag ceramic and its preparation method. The preparation method of this embodiment is the same as the preparation method in Example 1. The difference is that the raw material ratio used is: blast furnace nickel 30% iron slag, 40% gangue, and 30% ordinary clay; the firing temperature used is 1250°C, and the firing time is 30 minutes.

[0044] The ferronickel slag ceramic product provided in this embodiment has a flexural strength of 84.26 MPa and a water absorption rate of 1.58%. It is an excellent ceramic material, and its crystal phase contains anorthite and spinel.

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Abstract

The invention provides a ferro-nickel slag ceramic and a preparation method thereof. The preparation method comprises the following steps of selecting one or multiple of quartz, silicon and aluminum-rich raw material and calcium raw material; mixing 20 to 65wt% of ferro-nickel slag, 0 to 10wt% of quartz, 20 to 70wt% of silicon and aluminum-rich raw material and 0 to 30wt% of calcium raw material;grinding, granulating, forming, and firing, so as to obtain the ferro-nickel slag ceramic. The preparation method has the advantages that the ferro-nickel slag can be used in a batch way, the preparation method is simple, the implementing is easy, and the industrialized production is favorably realized; the crystal phases in the prepared building ceramic materials (ceramic tiles and ceramic sintering bricks), industrial ceramics and other ceramic materials contain one or multiple of anorthite, spinel, olivine and cordierite, the sintering is easy, and the mechanical property is excellent.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste resources, and in particular relates to a ferronickel slag ceramic and a preparation method thereof. Background technique [0002] In recent years, the annual output of ferronickel slag discharged from ferronickel smelting in my country is more than 40 million tons, which has become the fourth largest smelting slag after blast furnace slag, steel slag and red mud. Ferronickel slag has no good utilization channels at present, and its main treatment methods are open-air stockpiling or landfill, which has caused huge waste of resources and environmental damage, and seriously restricted the sustainable development of the ferronickel smelting industry. [0003] The development and utilization of ferronickel slag is currently mainly in the following three aspects: concrete fine aggregate, compounding with alkali activator to produce composite inorganic polymer, and compounding wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/16C04B33/138C04B33/04C04B33/132
CPCC04B33/04C04B33/132C04B33/138C04B33/16C04B2235/6567C04B2235/96Y02P40/60
Inventor 李宇任育鹏裴德健
Owner UNIV OF SCI & TECH BEIJING
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