CN100402470C - Thermal-knock resisting diamond spar-spinele refractory materials and its production - Google Patents

Thermal-knock resisting diamond spar-spinele refractory materials and its production Download PDF

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Publication number
CN100402470C
CN100402470C CNB2006100533020A CN200610053302A CN100402470C CN 100402470 C CN100402470 C CN 100402470C CN B2006100533020 A CNB2006100533020 A CN B2006100533020A CN 200610053302 A CN200610053302 A CN 200610053302A CN 100402470 C CN100402470 C CN 100402470C
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China
Prior art keywords
spinel
refractory materials
corundum
shockproof
particle
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Expired - Fee Related
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CNB2006100533020A
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Chinese (zh)
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CN1939875A (en
Inventor
王家邦
王立旺
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

A diamond spar-spinele refractory material with high-thermal shock resistance and its production are disclosed. The process is carried out by taking spinel grain and electric-melting diamond spar grain as aggregate, taking diamond spar powder, aluminum oxide powder, electric-melting magnesium powder and titanium pigment as substrates, taking industrial citrine as binder and sintering at 1000-1650 degree in industrial furnace and metallurgical kiln lining. It has excellent thermal stability and high-temperature resistance, better mechanical strength and alkali resistance and abrasion resistance. It can be used for various non-ferrous metal metallurgical kilns, cement rotary kiln, high-temperature tunnel kiln and glass kiln.

Description

A kind of highly heatproof and shockproof corundum-spinel refractory materials and preparation method thereof
Technical field
The present invention relates to refractory materials, particularly relate to a kind of highly heatproof and shockproof corundum-spinel refractory materials and preparation method thereof.
Background technology
Along with development of modern science and technology, have higher requirement to the quality of high-temperature material in aspects such as metallurgical production, pottery and building materials kiln furnitures, when reducing its production cost, widelys popularize environmentally friendly and the resource-conserving material.
Several main refractory raw material of China has the alumina based raw material, comprises fused corundom, spinel, mullite; Magnesia raw material comprises big crystallization 98 electrosmelted magnesite clinkers, high ferro high calcium magnesia, electric smelting or sintering magnesia-chrome sand; The non-oxidized substance material comprises ferro-silicon nitride, silicon nitride.Fully utilize these feedstock production and go out the type material of excellent performance, caused people's extensive concern.In the middle of magnesia spinel, add Cr 2O 3But acceleration of sintering, the density of the different spinels of forming of raising, but chromium can pollute environment.And employing TiO 2Make additive, TiO 2Solid solution and Al 2O 3Precipitation from spinel structure makes Ti 4+Occupy Al in the spinel lattice 3+The position on, cause the generation in room, promoted the diffusion of atom and the migration of material, help the densification of magnesium-aluminium spinel.With Cr 2O 3Compare TiO 2Better to the densification effect in the promotion magnesium-aluminium spinel sintering process, and TiO in the sintering process 2Generate aluminium titanates with the aluminum oxide reaction, thermal shock resistance is excellent more.
Summary of the invention
The object of the present invention is to provide a kind of highly heatproof and shockproof corundum-spinel refractory materials and preparation method thereof,
The technical solution adopted for the present invention to solve the technical problems is as follows:
One, a kind of highly heatproof and shockproof corundum-spinel refractory materials, its compositions in weight percentage proportioning is as follows:
Spinel particle≤3mm 40~50%;
Fused corundom particle≤3mm 15~30%;
Lapis amiridis≤180 orders 10~20%;
Aluminum oxide powder≤320 orders 10~20%;
Electric molten magnesite powder≤320 orders 3~7%;
Titanium dioxide≤320 orders 2~10%;
Add wedding agent 3~5%.
Two, a kind of preparation method's (components by weight percentage) of highly heatproof and shockproof corundum-spinel refractory materials:
With≤180 purpose lapis amiridiss, 10~20% ,≤320 purpose aluminum oxide powders 10~20% ,≤320 purpose electric molten magnesite powder 3~7% and≤320 purpose titanium dioxides 2~10% by proportioning add in the ball mill dried be mixed even; Again the spinel particle material 40~50% of general≤3mm and≤3mm fused corundom particulate material 15~30% dried be mixed even after, add wedding agent 3~5% wet mixings; Again with particulate material and powder wet mixing; Airtight placement 4~24 hours; Mechanical pressing, drying and burn till.
The best in quality percentage composition of each component is a spinel particle 46%, fused corundom particle 20%, and lapis amiridis 13%, aluminum oxide powder 12%, electric molten magnesite powder 5%, titanium dioxide 4% adds wedding agent and accounts for 5%.
Smaller or equal to 3 millimeters spinel particles and fused corundom particle, set of dispense than in comprise the 1-3 millimeter and less than 1 millimeter.
The used wedding agent that adds is that concentration is 10~30% industrial yellow starch gum solution.
The weight ratio of the gross weight of lapis amiridis, aluminum oxide powder, electric molten magnesite powder and titanium dioxide and ball is 1: 1~1: 3 in the ball mill.
Be molded on 400 tons of friction presses and carry out.
Goods descend dry residual water-content less than 1% at 60-80 ℃.
Firing temperature is 1600-1700 ℃, and insulation is 6-8 hour under this temperature.
The beneficial effect that the present invention has is:
By adjustment, make material have suitable stress relieve to corundum and each raw material granularity of spinel.Adjust alumina content and a small amount of added ingredients, can improve top coat in the use tack and the refractory of material decreased property etc.Compound by corundum and spinel, on the basis of traditional magnesium chromia material, adopted the Chrome-free prescription, introduce the part fused corundom, behind the minimizing spinel content, not only improved anti-melting loss performance and resistance to elevated temperatures, and titanium dioxide that adds and aluminum oxide reaction generation aluminium titanates, the conjunctive tissue of tiny crack transfer material further can be improved stress relieve and thermal shock resistance, thereby develop the corundum-spinel refractory materials of high comprehensive performance.
The corundum-spinel refractory materials that the above-described matching method of the present invention is processed can be widely used in various Industrial Stoves and the metallurgical furnace lining of furnace temperature between 1000-1650 ℃, Heat stability is good at high temperature, do not split constantly, it has good high temperature resistant, alkaline-resisting erosion, abrasion resistance properties, and the physical strength height, good thermal shock stability, refractoriness under load is suitable, can be widely used in various non-ferrous metal smelting furnaces, cement rotary kiln is on hyperthermia tunnel Kiln and the glass kiln.
Because corundum-spinel refractory materials of the present invention can be relatively easy to realize large-scale mechanize production, can reduce its production cost, and can produce multiple special shaped brick according to actual needs.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Embodiment 1
(1) batching is formed
Aggregate: spinel particle 1-3mm 36%
Spinel particle 1mm following 10%
Fused corundom particle 1-3mm 8%
Fused corundom particle 1mm following 12%
Powder mix: lapis amiridis≤180 orders 13%
Aluminum oxide powder≤320 orders 12%
Electric molten magnesite powder≤320 orders 5%
Titanium dioxide≤320 orders 4%
Add wedding agent: concentration is 20% yellow starch gum solution 3%
(2) technological process
As shown in drawings, powder mix mixing process is carried out in ball mill, the aggregate process of mixing adopts the planetary sand mill of 750 types, aggregate mixes the back and adds the wedding agent wet mixing, and then adds powder mix, stirs. airtight placement 4~24 hours. and 400 tons of friction presses are adopted in moulding, the dry tunnel furnace formula moisture eliminator that adopts is dry down at 60-80 ℃, residual water-content burns till the employing tunnel furnace less than 1%, and maximum sintering temperature is 1700 ℃.
Embodiment 2
(1) batching is formed
Aggregate: spinel particle 1-3mm 36%
Spinel particle 1mm following 4%
Fused corundom particle 1-3mm 8%
Fused corundom particle 1mm following 22%
Powder mix: lapis amiridis≤180 orders 10%
Aluminum oxide powder≤320 orders 11%
Electric molten magnesite powder≤320 orders 7%
Titanium dioxide≤320 orders 2%
Add wedding agent: concentration is 20% yellow starch gum solution 5%
(2) technological process
Maximum sintering temperature is 1680 ℃, other technology such as embodiment 1
Embodiment 3
(1) batching is formed
Aggregate: spinel particle 1-3mm 40%
Spinel particle 1mm following 10%
Fused corundom particle 1-3mm 6%
Fused corundom particle 1mm following 9%
Powder mix: lapis amiridis≤180 orders 10%
Aluminum oxide powder≤320 orders 12%
Electric molten magnesite powder≤320 orders 3%
Titanium dioxide≤320 orders 10%
Add wedding agent: concentration is 20% yellow starch gum solution 4%
(2) technological process
Technological process such as embodiment 1.
Embodiment 4
(1) batching is formed
Aggregate: spinel particle 1-3mm 35%
Spinel particle 1mm following 10%
Fused corundom particle 1-3mm 10%
Fused corundom particle 1mm following 7%
Powder mix: lapis amiridis≤180 orders 20%
Aluminum oxide powder≤320 orders 10%
Electric molten magnesite powder≤320 orders 5%
Titanium dioxide≤320 orders 3%
Add wedding agent: concentration is 20% yellow starch gum solution 5%
(2) technological process
Technological process such as embodiment 1.
Embodiment 5
(1) batching is formed
Aggregate: spinel particle 1-3mm 36%
Spinel particle 1mm following 4%
Fused corundom particle 1-3mm 8%
Fused corundom particle 1mm following 10%
Powder mix: lapis amiridis≤180 orders 13%
Aluminum oxide powder≤320 orders 20%
Electric molten magnesite powder≤320 orders 5%
Titanium dioxide≤320 orders 4%
Add wedding agent: concentration is 20% yellow starch gum solution 3%
(2) technological process
Technological process such as embodiment 1.
Corundum-spinel refractory materials of the present invention, its principal crystalline phase is aluminum oxide and spinel, paracrystalline phase is an aluminium titanates, refractoriness is greater than 1780 ℃, 0.2MPa following refractoriness under load is 1550 ℃, strength at normal temperature and compressive strength reach 15MPa and 90MPa respectively, apparent porosity 22%, and thermal shock resistance is greater than 10 times.

Claims (9)

1. highly heatproof and shockproof corundum-spinel refractory materials is characterized in that the compositions in weight percentage proportioning is as follows:
Spinel particle≤3mm 40~50%;
Fused corundom particle≤3mm 15~30%;
Lapis amiridis≤180 orders 10~20%;
Aluminum oxide powder≤320 orders 10~20%;
Electric molten magnesite powder≤320 orders 3~7%;
Titanium dioxide≤320 orders 2~10%;
Add wedding agent 3~5%.
2. the preparation method who is used for the described a kind of highly heatproof and shockproof corundum-spinel refractory materials of claim 1, it is characterized in that: components by weight percentage, with≤180 purpose lapis amiridiss 10~20% ,≤320 purpose aluminum oxide powders 10~20% ,≤320 purpose electric molten magnesite powder 3~7% and≤320 purpose titanium dioxides 2~10% by proportioning add in the ball mill dried be mixed even; Again the spinel particle material 40~50% of general≤3mm and≤3mm fused corundom particulate material 15~30% dried be mixed even after, add wedding agent 3~5% wet mixings; Again with particulate material and powder wet mixing; Airtight placement 4~24 hours; Mechanical pressing, drying and burn till.
3. the preparation method of a kind of highly heatproof and shockproof corundum-spinel refractory materials according to claim 2, it is characterized in that: the quality percentage composition of each component is a spinel particle 46%, fused corundom particle 20%, lapis amiridis 13%, aluminum oxide powder 12%, electric molten magnesite powder 5%, titanium dioxide 4% adds wedding agent and accounts for 5%.
4. the preparation method of a kind of highly heatproof and shockproof corundum-spinel refractory materials according to claim 2 is characterized in that: smaller or equal to 3 millimeters spinel particles and fused corundom particle, set of dispense than in comprise the 1-3 millimeter and less than 1 millimeter.
5. the preparation method of a kind of highly heatproof and shockproof corundum-spinel refractory materials according to claim 2 is characterized in that: the used wedding agent that adds is that concentration is 10~30% industrial yellow starch gum solution.
6. the preparation method of a kind of highly heatproof and shockproof corundum-spinel refractory materials according to claim 2 is characterized in that: the weight ratio of the gross weight of lapis amiridis, aluminum oxide powder, electric molten magnesite powder and titanium dioxide and ball is 1: 1~1: 3 in the ball mill.
7. the preparation method of a kind of highly heatproof and shockproof corundum-spinel refractory materials according to claim 2 is characterized in that: be molded on 400 tons of friction presses and carry out.
8. the preparation method of a kind of highly heatproof and shockproof corundum-spinel refractory materials according to claim 2 is characterized in that: the corundum-spinel refractory materials descends dry residual water-content less than 1% at 60-80 ℃.
9. the preparation method of a kind of highly heatproof and shockproof corundum-spinel refractory materials according to claim 2 is characterized in that: firing temperature is 1600-1700 ℃, and insulation is 6-8 hour under this temperature.
CNB2006100533020A 2006-09-07 2006-09-07 Thermal-knock resisting diamond spar-spinele refractory materials and its production Expired - Fee Related CN100402470C (en)

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Application Number Priority Date Filing Date Title
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Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
CN101367663B (en) * 2008-09-28 2011-08-31 瑞泰科技股份有限公司 Melt-out recombined composite aluminum oxide refractory materials
CN101481255B (en) * 2009-02-19 2011-09-21 浙江大学 High-heat resistance shock resistant mullite bearing burning plate and preparation thereof
CN101648817B (en) * 2009-08-28 2011-12-28 中材高新材料股份有限公司 High temperature resistance low-expansion high-radiation (reflecting) inorganic waterproof coating
CN101792323B (en) * 2010-03-17 2012-12-26 赵大兴 Aluminum-chromium-zirconium composite air bricks and manufacturing method thereof
CN101863675B (en) * 2010-06-07 2012-07-04 浙江大学 High-alumina structure heat-insulation integrated composite brick and preparation method
CN102285811A (en) * 2011-06-06 2011-12-21 浙江大学 Corundum-spinel structure and thermal insulation integrated composite brick and preparation method thereof
CN103864432B (en) * 2014-03-13 2015-05-20 赵大兴 Aluminum chromium zirconium nitride composite ceramic material and preparation method thereof
CN107352985A (en) * 2017-07-19 2017-11-17 合肥铭佑高温技术有限公司 A kind of glass furnace cooling section Corundum composite brick
CN109133987B (en) * 2018-10-29 2021-09-24 成都府天高温材料科技有限公司 Corundum-spinel breathable material and preparation method thereof

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