CN105481375A - Energy-saving and fire-resistant material - Google Patents

Energy-saving and fire-resistant material Download PDF

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Publication number
CN105481375A
CN105481375A CN201410474501.3A CN201410474501A CN105481375A CN 105481375 A CN105481375 A CN 105481375A CN 201410474501 A CN201410474501 A CN 201410474501A CN 105481375 A CN105481375 A CN 105481375A
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CN
China
Prior art keywords
micro
fire
micro mist
present
mullite aggregate
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Pending
Application number
CN201410474501.3A
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Chinese (zh)
Inventor
张磊
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Qingdao Weiye Forging Machinery Co Ltd
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Qingdao Weiye Forging Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Weiye Forging Machinery Co Ltd filed Critical Qingdao Weiye Forging Machinery Co Ltd
Priority to CN201410474501.3A priority Critical patent/CN105481375A/en
Publication of CN105481375A publication Critical patent/CN105481375A/en
Pending legal-status Critical Current

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Abstract

The present invention belongs to the field of fire-resistant materials, and particularly relates to a fire-resistant material for high-temperature industrial equipment working layers and metal smelting equipment thermal insulation layer, wherein the fire-resistant material comprises microporous mullite aggregate, active A1203 micro-powder, Si02 micro-powder, graphite and bauxite fine powder. According to the present invention, the materials are used to prepare the fire-resistant casting material and the prefabricated membrane standard product, and the products have characteristics of high strength, low specific gravity, high fire resistance, good thermal shock resistance and the like, and can be directly used for high temperature equipment working layers, alternative metallurgical melting furnace permanent lining, and thermal insulation layers; and with the high temperature equipment of the present invention, the advantages of heat loss reducing, equipment service life prolonging, energy source saving and cost reducing can be provided.

Description

A kind of economical refractory material
Technical field
The present invention relates to technical field of refractory materials, be specifically related to a kind of economical refractory material.
Background technology
In metallurgical Steel industry process, after converter smelting, high-temperature molten steel finally casts base substrate through ladle and tundish, must build refractory materials by laying bricks or stones in all high-temperature fusion containers that smelting technology relates to, conventional refractory materials lining is divided into working lining, thermal insulation layer, permanent layer.The refractory materials heat-insulating property used due to routine is bad, and molten steel temperature in container declines fast, for ensureing the performance of steel, must improve the initial temperature of molten steel, to meet technique needs.
In hot blast and heat distribution pipeline, in order to ensure the temperature of high-temperature gas in course of conveying, in pipeline, build refractory materials by laying bricks or stones.In high temperature kiln uses, be ensure the heat insulation effect of kiln, improve inner lining of kiln work-ing life simultaneously, normal adopt to be combined by heavy brick and lightweight refractory build by laying bricks or stones, cause inner lining of kiln thermal capacity large, thermo-efficiency reduces.Because traditional lightweight lagging material intensity is low, can not working lining be directly used in, must build by laying bricks or stones with multiple layer refractory, caliber is increased.
Summary of the invention
For the object of this invention is to provide a kind of economical refractory material, this lagging material intensity is high, lightweight, good thermal shock, refractoriness is high, can replace raw steel bag, tundish permanent liner and thermal insulation layer, or for the Thermal Equipment of noncontact high-temperature fusant and pipeline, can working lining be directly used in, not only improve heat insulation effect, and the work-ing life of extension device.
For achieving the above object, the present invention is achieved in that
A kind of economical refractory material, by micro-pore mullite aggregate, active A 1 20 3micro mist, graphite, alumine micro mist, Si0 2micro mist and swelling agent composition; Its chemical composition is by weight percentage:
5-8mm micro-pore mullite aggregate: 0.1-15%;
3-5mm micro-pore mullite aggregate: 10-20%;
1-3mm micro-pore mullite aggregate: 15-25%;
0-1mm micro-pore mullite aggregate: 5-15%;
Alumine micro mist: 3-10%;
Graphite: 5-25%;
Si0 2micro mist: 1-5%;
Active A 1 20 3micro mist: 1-5%;
Swelling agent: 5-15%.
A1 in described micro-pore mullite aggregate 20 3>=60%; Fe 2o 3≤ 1.5; Volume density≤1.5; Void content>=50%; Compressive strength>=9Mpa; Mean pore size D 50brilliant content>=35% of≤50um mullite
A1 in described alumine micro mist 20 3>=85%, 320 object fraction of particle>=65%.
Described A1 20 3a1 in micro mist 20 3>=95%, granularity is not more than the content >75% of the particulate of 5 μm.
Described Si0 2si0 in micro mist 2>=85%, granularity is not more than the content >80% of the particulate of 1 μ.
Described swelling agent is at least one in sillimanite, kyanite, andaluzite.
Introduce the effect of each component of refractory materials of the present invention below respectively:
The present invention is owing to adopting pure calcium aluminate cement and the a-A120 of fine crystallization micro-pore mullite aggregate, high refractoriness, and micro mist, therefore has high strength, high refractoriness, low heat conduction, the advantages such as good heat insulating.
The physical and chemical index of aggregate is: A1 20 3>=65%, Fe 20 ,≤1.2, volume density≤11, void content>=60%, compressive strength>=1OMPa.
Matrix composition mainly adopts ultra-fine micropowder, when use temperature reaches more than 000 DEG C, can participate in solid state reaction, generates new compound and forms ceramic phase, making weave construction densification, to improve the hot strength of refractory materials.
Alumine micro mist physical and chemical index: A1 20 3>=85%, all the other are Si0 2, Ti0 2, granularity is less than 600 and says:
Active A 1 20 3micro mist physical and chemical index: A1 20 3>=95%, the >80% of granularity≤2 μ;
Si0 2micro mist physical and chemical index: Si0 2>=92%, the >90% of granularity≤1 μ.
Graphite and water generation hydration reaction is utilized to play keying action, refractory materials is made to obtain stronger low, medium temperature intensity after baking, when this material at high temperature uses, free Ca0 and A120, micro mist reacts, form high temperature fusing point CA2 and CA6, thus improve refractory materials hot strength and resistance to deficient degree.
Swelling agent used in the present invention is sillimanite, kyanite, andaluzite batch mixing, and its proportioning is according to the preparation of product working conditions difference.
Main mine of the present invention is mullite, aluminate and corundum mutually, and the crystallization mullite that wherein different times generates has excellent heat-resistant knocking stability, and aluminate, corundum have good solidity to corrosion and high refractoriness.
The present invention may be used for ladle, the permanent liner of tundish and thermal insulation layer.
The present invention is directly used in nonmetal melt contacts high-temperature flame-proof lining, replaces the refractory lining that original weight matter and lightweight combine, and reduces the thickness of refractory lining, alleviate the operating weight of refractory materials, also improve the life-span, the heat insulation effect simultaneously had, greatly reduce the energy consumption of production.
Compared with prior art, beneficial effect of the present invention is:
Have that intensity is high, proportion is little, refractoriness is high and the feature such as thermal conductivity is little.Use high temperature service of the present invention, can reduce thermosteresis, the extension device life-span, save energy, reduces costs.
Embodiment
Technical scheme of the present invention is introduced in detail below by embodiment:
Embodiment 1: blast funnace hot blast stove supervisor and cold-air duct mix the Where Three Faults Meet of wind
At 1260M 3the Where Three Faults Meet place that blast funnace hot blast stove supervisor and cold-air duct mix wind uses integrated poured shaping, instead of original modular tile.The phenomenons such as pipeline crust cracking not only do not occur, and external skin temperatures declines 5 DEG C than other position.
Embodiment 2: make prefabricated section
Be fired into prefabricated section with this material, for coke oven door, improve the temperature at coke oven door place, extend the work-ing life of fire door, both improve output, again reduce production cost.
Embodiment 3: as permanent liner
High-strength heat-insulating material is made prefabricated section, for permanent liner (permanent layer and insulation lining being united two into one, thickness 90mm) the original reduction by 50 DEG C of ladle watchcase temperature ratio of 150 tons of ladles, and the low 0.17 DEG C/min of the more original ladle of molten steel temperature drop.

Claims (6)

1. an economical refractory material, is characterized in that: by micro-pore mullite aggregate, active A 1 20 3micro mist, graphite, alumine micro mist, Si0 2micro mist and swelling agent composition; Its chemical composition is by weight percentage:
5-8mm micro-pore mullite aggregate: 0.1-15%;
3-5mm micro-pore mullite aggregate: 10-20%;
1-3mm micro-pore mullite aggregate: 15-25%;
0-1mm micro-pore mullite aggregate: 5-15%;
Alumine micro mist: 3-10%;
Graphite: 5-25%;
Si0 2micro mist: 1-5%;
Active A 1 20 3micro mist: 1-5%;
Swelling agent: 5-15%.
2. refractory materials according to claim 1, is characterized in that: A1 in described micro-pore mullite aggregate 20 3>=60%; Fe 2o 3≤ 1.5; Volume density≤1.5; Void content>=50%; Compressive strength>=9Mpa; Mean pore size D 50brilliant content>=35% of≤50um mullite.
3. economical refractory material according to claim 1, is characterized in that: A1 in described alumine micro mist 20 3>=85%, 320 object fraction of particle>=65%.
4. economical refractory material according to claim 1, is characterized in that: described A1 20 3a1 in micro mist 20 3>=95%, granularity is not more than the content >75% of the particulate of 5 μm.
5. economical refractory material according to claim 1, is characterized in that: described Si0 2si0 in micro mist 2>=85%, granularity is not more than the content >80% of the particulate of 1 μ.
6. economical refractory material according to claim 1, is characterized in that: described swelling agent is at least one in sillimanite, kyanite, andaluzite.
CN201410474501.3A 2014-09-18 2014-09-18 Energy-saving and fire-resistant material Pending CN105481375A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410474501.3A CN105481375A (en) 2014-09-18 2014-09-18 Energy-saving and fire-resistant material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410474501.3A CN105481375A (en) 2014-09-18 2014-09-18 Energy-saving and fire-resistant material

Publications (1)

Publication Number Publication Date
CN105481375A true CN105481375A (en) 2016-04-13

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107602098A (en) * 2017-10-30 2018-01-19 孝义市和中兴矿产有限公司 Aluminium brick and preparation method thereof in a kind of high RUL
CN108610063A (en) * 2016-12-09 2018-10-02 宝山钢铁股份有限公司 High-performance mullite thermal insulation fire-resistant pouring material
CN110698185A (en) * 2019-10-25 2020-01-17 唐山金山腾宇科技有限公司 Light corundum-mullite composite refractory material for blast furnace air supply device
CN111517813A (en) * 2020-05-25 2020-08-11 郑州东豫新材料科技有限公司 Heavy refractory material used for top combustion type hot blast stove top and capable of resisting thermal shock and preparation method thereof
CN113045323A (en) * 2021-04-08 2021-06-29 中钢洛耐科技股份有限公司 Gradient heat-interception heat-preservation material and preparation method and application thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108610063A (en) * 2016-12-09 2018-10-02 宝山钢铁股份有限公司 High-performance mullite thermal insulation fire-resistant pouring material
CN108610063B (en) * 2016-12-09 2021-01-12 宝山钢铁股份有限公司 High-performance mullite heat-insulating refractory castable
CN107602098A (en) * 2017-10-30 2018-01-19 孝义市和中兴矿产有限公司 Aluminium brick and preparation method thereof in a kind of high RUL
CN110698185A (en) * 2019-10-25 2020-01-17 唐山金山腾宇科技有限公司 Light corundum-mullite composite refractory material for blast furnace air supply device
CN111517813A (en) * 2020-05-25 2020-08-11 郑州东豫新材料科技有限公司 Heavy refractory material used for top combustion type hot blast stove top and capable of resisting thermal shock and preparation method thereof
CN113045323A (en) * 2021-04-08 2021-06-29 中钢洛耐科技股份有限公司 Gradient heat-interception heat-preservation material and preparation method and application thereof

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Application publication date: 20160413