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Forsterite-spinel ceramic based on high-carbon ferrochrome slag and preparation method of forsterite-spinel ceramic

A high-carbon ferrochrome and forsterite technology, which is applied in the field of forsterite-spinel ceramics and its preparation, can solve the problems of poor thermal shock resistance of forsterite ceramics, hindering application, and large thermal expansion coefficient, achieving Significant social and economic benefits, improved resource utilization, and high recycling rates

Active Publication Date: 2021-02-12
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weakness of forsterite material is its large thermal expansion coefficient, which makes forsterite ceramics poor in thermal shock resistance and hinders its application in many fields.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A forsterite-spinel ceramic based on high-carbon ferrochrome slag and a preparation method thereof. The preparation method described in this example is:

[0035] Step 1: Put the high-carbon ferrochrome slag in a muffle furnace, roast at 600° C. for 2 hours, cool with the furnace, crush, and sieve to obtain high-carbon ferrochromium slag fine powder with a particle size of ≤0.088 mm.

[0036] Step 2, according to the high carbon ferrochrome slag fine powder is 70wt%, magnesium oxide fine powder is 25wt% and aluminum oxide fine powder is 5wt% batching, described high carbon ferrochrome slag fine powder, magnesium oxide fine powder and The alumina fine powder is placed in a ball mill, and ball milled for 4 hours to obtain a ball mill.

[0037] Step 3: pre-pressing the ball abrasive, crushing the shaped green body, and sieving to obtain a sieve material with a particle size of 180 μm; then machine-press the sieve material under the condition of 100 MPa, and hold the pressu...

Embodiment 2

[0045] A forsterite-spinel ceramic based on high-carbon ferrochrome slag and a preparation method thereof. The preparation method described in this example is:

[0046] Step 1: Put the high-carbon ferrochrome slag in a muffle furnace, roast it at 620° C. for 2 hours, cool with the furnace, crush, and sieve to obtain high-carbon ferrochromium slag fine powder with a particle size of ≤0.088 mm.

[0047] Step 2, according to described high carbon ferrochrome slag fine powder is 70wt%, magnesium oxide fine powder is 15wt% and aluminum oxide fine powder is 15wt% batching, described high carbon ferrochrome slag fine powder, magnesium oxide fine powder and The alumina fine powder is placed in a ball mill, and ball milled for 5 hours to obtain a ball mill.

[0048] Step 3, pre-pressing the ball abrasive, then crushing and sieving the shaped green body to obtain a sieving material with a particle size of 200 μm; then machine-pressing the sieving material under the condition of 100 MPa...

Embodiment 3

[0056] A forsterite-spinel ceramic based on high-carbon ferrochrome slag and a preparation method thereof. The preparation method described in this example is:

[0057] Step 1: Put the high-carbon ferrochrome slag in a muffle furnace, roast it at 640° C. for 2.5 hours, cool with the furnace, crush, and sieve to obtain high-carbon ferrochrome slag fine powder with a particle size of ≤0.088 mm.

[0058] Step 2, according to the high carbon ferrochrome slag fine powder is 75wt%, magnesium oxide fine powder is 17wt% and aluminum oxide fine powder is 8wt% batching, described high carbon ferrochrome slag fine powder, magnesium oxide fine powder and The alumina fine powder is placed in a ball mill, and ball milled for 6 hours to obtain a ball mill.

[0059] Step 3, pre-pressing the ball abrasive, then crushing the shaped green body, and sieving to obtain a sieving material with a particle size of 220 μm; then machine-pressing the sieving material under the condition of 105 MPa, and ...

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Abstract

The invention discloses forsterite-spinel ceramic based on high-carbon ferrochrome slag and a preparation method of the forsterite-spinel ceramic. According to the technical scheme, the method comprises the steps: placing high-carbon ferrochrome slag in a muffle furnace, roasting the slag for 2-3 h at the temperature of 600-700 DEG C, cooling, crushing and screening along with the furnace, and obtaining high-carbon ferrochrome slag fine powder; placing 70-80 wt% of high-carbon ferrochrome slag fine powder, 15-25 wt% of magnesium oxide fine powder and 5-15 wt% of aluminum oxide fine powder in aball mill to be subjected to ball milling, pre-pressing forming, crushing, screening, mechanical pressing forming and drying; and putting the dried green body into a box-type resistance furnace, heating to 900-1000 DEG C at a rate of 5-7 DEG C / min, then heating to 1150-1250 DEG C at a rate of 3-5 DEG C / min, and carrying out heat preservation for 2-3 hours to obtain the forsterite-spinel ceramic based on the high-carbon ferrochrome slag. According to the method, the recycling rate of industrial solid waste high-carbon ferrochrome slag is high, resource utilization of the high-carbon ferrochrome slag is improved, environmental protection and harmlessness are achieved, and a prepared product is excellent in thermal shock resistance and small in harm of chromium ions to the environment.

Description

technical field [0001] The invention belongs to the technical field of forsterite-spinel ceramics. In particular, it relates to a forsterite-spinel ceramic based on high-carbon ferrochrome slag and a preparation method thereof. Background technique [0002] High-carbon ferrochrome slag is an industrial solid waste produced in the process of smelting ferrochrome alloy, which belongs to general industrial waste. Due to large emissions, the current utilization rate of high-carbon ferrochromium slag is only 30%, and most of it is piled in the open air. How to effectively utilize these huge quantities of secondary resources to manufacture high value-added products and reduce environmental pollution is an urgent problem to be solved at present. [0003] At present, the research on the application of high-carbon ferrochrome slag in building materials is mainly to use high-carbon ferrochrome slag to prepare mortar. For example, "New gradation optimization method of ferrochrome sl...

Claims

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Application Information

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IPC IPC(8): C04B35/20C04B35/622
CPCC04B35/20C04B35/62204C04B2235/3222C04B2235/6562C04B2235/6567C04B2235/602C04B2235/9607Y02P40/60
Inventor 赵惠忠冯泽成谈利强
Owner WUHAN UNIV OF SCI & TECH