CN101113104A - Production of composite corundum carbon brick for ladle - Google Patents

Production of composite corundum carbon brick for ladle Download PDF

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Publication number
CN101113104A
CN101113104A CNA2007100924090A CN200710092409A CN101113104A CN 101113104 A CN101113104 A CN 101113104A CN A2007100924090 A CNA2007100924090 A CN A2007100924090A CN 200710092409 A CN200710092409 A CN 200710092409A CN 101113104 A CN101113104 A CN 101113104A
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CN
China
Prior art keywords
ladle
production
carbon brick
graphite
corundum
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CNA2007100924090A
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Chinese (zh)
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CN100448801C (en
Inventor
张泽
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重庆钢铁(集团)有限责任公司
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Priority to CNB2007100924090A priority Critical patent/CN100448801C/en
Publication of CN101113104A publication Critical patent/CN101113104A/en
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Publication of CN100448801C publication Critical patent/CN100448801C/en

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Abstract

The invention discloses a production method for composite corundum carbon brick used in ladle; the material ratio of the invention is that high alumina corundum 35-40%, fused magnesia 25-35%, fused alumina-magnesia spinel 10-15%, graphite 6-7%, aluminum powder 1-2%, silicon powder 1-3%, silicon carbide 3-5%, aluminum oxide 3-5%, resin 3.5-3.8%; an the manufacturing process is that stirring - molding and shaping - drying - heating - checking and warehousing. The service life of the composite corundum carbon brick used in ladle produced by the method can be greatly prolonged, the average service life can reach 130 times, and the highest is 146 times, the lowest is 123 times, which is higher than the original service life 60-80 times by one time, thus keeping the high production continuity and bringing forth considerable economic effectiveness.

Description

The production method of composite corundum carbon brick for ladle

Technical field

The present invention relates to a kind of refractory materials production technical field, relate to a kind of production method of composite corundum carbon brick for ladle particularly.

Background technology

Working lining with bag wall (non-slag line zone) at the bottom of the bag of steelworks smelting furnace refining ladle (80-160t) all is the various composite bricks that adopt, the most primary requirement is that the life-span is long to composite brick, otherwise liner often more changes jobs, not only influence the continuity of work, and because the maintenance stopping production can cause very big financial loss.Existing domestic similar ladle low deficiency of product ubiquity life-span, average level at the 60-80 stove, this is because the reason of following several respects causes: 1, existing ladle is comparatively cheap with the selected material of brick major ingredient, include the alumina and the magnesia that influence product performance in the raw material, cause product specification low; 2, carbon content height (about 10%), the thermal conductivity of the content influence product of carbon, carbon content is high more, and product heat conduction is fast more, is unfavorable for the insulation of molten steel in ladle; 3, the reason of process aspect, particularly the controlling party in batch mixing process and baking exerts an influence in the face of product performance.

Summary of the invention

At existing ladle product above shortcomings, the purpose of this invention is to provide a kind of production method of composite corundum carbon brick for ladle, the composite corundum carbon brick for ladle that utilizes present method to produce can improve its work-ing life greatly.

The object of the present invention is achieved like this:

The production method of composite corundum carbon brick for ladle, its proportioning raw materials is constructed as follows (mass percent): sub-white corundum 35-40%, electrosmelted magnesite clinker 25-35%, electric smelting aluminum-spinel 10-15%, graphite 6-7%, aluminium powder 1-2%, silica flour 1-3%, carborundum powder 3-5%, aluminum oxide powder 3-5%, resin 3.5-3.8%;

It comprises following production stage,

1) spice machine spice: make spice machine low-speed running, add sub-white corundum and electrosmelted magnesite clinker particle earlier---to add resin again and------added graphite and------added electric smelting aluminum-spinel, aluminium powder, silica flour, carborundum powder and aluminum oxide powder------high speed wet mixing 8-15 minute---low speed discharging in wet mixing 3-5 minute in wet mixing 3-5 minute in wet mixing 3-5 minute;

2) press-molding;

3) cool base makes its seasoning;

4) toast in dry kiln, keep the interior hot blast temperature of kiln body at 200-250 ℃, storing time was not less than 12 hours;

5) pick, warehouse-in.

Further, described sub-white corundum is made up of 1-3mm and two kinds of specification particle diameters of 3-5mm, accounts for the 20-25% and the 10-15% of raw material total mass respectively; Described electrosmelted magnesite clinker is made up of 0-1mm (being that 1mm is following), 1-3mm and three kinds of specification particle diameters of 3-5mm, accounts for 5-10%, 10-15% and the 5-10% of raw material total mass respectively.

Described graphite is the graphite of-195~-197 specifications.

Described spice machine low-speed running is 50-60r/min, is 115-125r/min at a high speed.

Compared to existing technology, the composite corundum carbon brick for ladle that adopts present method to produce can improve its work-ing life greatly.Experiment shows that its mean lifetime can reach 130 times, and high energy reaches 146 times, and minimum also have 123 times, and more originally 60-80 time improved whole one times, makes production can keep high continuity thus, thereby brings considerable economic.

Description of drawings

Fig. 1 is a process flow sheet of the present invention.

Embodiment

Introduce the present invention in detail below in conjunction with embodiment.

It is main raw material that this technology is chosen sub-white corundum, electrosmelted magnesite clinker, electric smelting spinel etc., its proportioning raw materials is constructed as follows (mass percent) particularly: sub-white corundum 35-40%, electrosmelted magnesite clinker 25-35%, electric smelting aluminum-spinel 10-15%, graphite 6-7%, metallic aluminium 1-2%, Pure Silicon Metal 1-3%, 95 silicon carbide 3-5%, aluminum oxide 3-5%, resin 3.5-3.8%.Wherein metallic aluminium, Pure Silicon Metal and silicon carbide are antioxidant, and aluminum oxide is an agglutinant, and resin is a wedding agent.

Character requirement to above-mentioned raw materials: sub-white corundum is a particle, is made up of 1-3mm and two kinds of specification particle diameters of 3-5mm, accounts for the 20-25% and the 10-15% of raw material total mass respectively; Described electrosmelted magnesite clinker is a particle, is made up of 0-1mm, 1-3mm and three kinds of specification particle diameters of 3-5mm, accounts for 5-10%, 10-15% and the 5-10% of raw material total mass respectively; Spinel, metallic aluminium, Pure Silicon Metal, silicon carbide, aluminum oxide and graphite are powder, and graphite is then selected the graphite of-195~-197 specifications for use.

Production process of the present invention is:

1) spice machine spice: make spice machine low-speed running, low speed is controlled at 50-60r/min, add sub-white corundum and electrosmelted magnesite clinker earlier---add resin again---wet mixing 3-5 minute---add graphite---wet mixing 3-5 minute---add electric smelting aluminum-spinel, aluminium powder, silica flour, silicon carbide powder and alumina powder high speed wet mixing 8-15 minute in---wet mixing 3-5 minute---, the high speed rotating speed is controlled at 115-125r/min---the low speed discharging;

2) dress mould, moulding: select two kinds of press-moldings of 630T and 1000T usually for use.

Can carry out work in-process to the moulding adobe and detect, require volume density 〉=3.05g/cm 3, apparent porosity≤4.0%.

Work in-process physical dimension deviation allowed band: unit: mm

Project Index Permissible variation in dimension Long ±1.0 Wide ±1.0 Thick ±0.5 Distortion Be not more than 1 Depth of the damaged vertex 2 Depth of the damage edge 1 Crackle Being forbidden has Relative edge's poor (thickness) Be not more than 1 The diagonal-size deviation Being forbidden has

The fluffing of moulding sand Being forbidden has The section slabbing Being forbidden has Haftplatte Being forbidden has

3) cool base makes its seasoning;

4) feeding hot blast in dry kiln toasts adobe, comprise three steps in the dry kiln, preheating-concentrated baking-naturally cooling, hot-blast main's temperature is controlled at 380-400 ℃, each arm temperature is controlled at 260-300 ℃, and hot blast temperature is at 200-250 ℃ in concentrating baking section maintenance kiln body, and concentrated storing time was not less than 12 hours, if be lower than 12 hours, influence product strength;

5) pick, warehouse-in.

Finished product detection index of the present invention:

MgO 28-32%, Al 2O 360-65%, C 6-8%, ultimate compression strength 〉=50MPa, high temperature break resistant intensity 〉=16MPa.

The permissible variation in dimension of finished bricks and outward appearance should meet the regulation of table 2

Table 2 unit: mm

Project Index Permissible variation in dimension Size ????<200 ??±1 ????200~300 ??±1.5 Distortion ??《1 Depth of the damaged vertex ??《6 Depth of the damage edge ??《4 Crackle Being forbidden has Relative edge's poor (wide, thick) ??《0.5 Pitted skin Being forbidden has The section slabbing Being forbidden has Haftplatte Being forbidden has

Annotate: gauge permissible variation ± 0.5mm, but control is as the criterion with absolute value.

Fig. 1 is seen in technical process of the present invention.

Claims (6)

1. the production method of composite corundum carbon brick for ladle, it is characterized in that: its proportioning raw materials is constructed as follows (mass percent): sub-white corundum 35-40%, electrosmelted magnesite clinker 25-35%, electric smelting aluminum-spinel 10-15%, graphite 6-7%, aluminium powder 1-2%, silica flour 1-3%, carborundum powder 3-5%, aluminum oxide powder 3-5%, resin 3.5-3.8%;
It comprises following production stage,
1) spice machine spice: make spice machine low-speed running, add sub-white corundum and electrosmelted magnesite clinker particle earlier---to add resin again and------added graphite and------added electric smelting aluminum-spinel, aluminium powder, silica flour, carborundum powder and aluminum oxide powder------high speed wet mixing 8-15 minute---low speed discharging in wet mixing 3-5 minute in wet mixing 3-5 minute in wet mixing 3-5 minute;
2) press-molding;
3) cool base makes its seasoning;
4) toast in dry kiln, keep the interior hot blast temperature of kiln body at 200-250 ℃, storing time was not less than 12 hours;
5) pick, warehouse-in.
2. the production method of composite corundum carbon brick for ladle according to claim 1, it is characterized in that: described sub-white corundum is made up of 1-3mm and two kinds of specification particle diameters of 3-5mm, accounts for the 20-25% and the 10-15% of raw material total mass respectively.
3. the production method of composite corundum carbon brick for ladle according to claim 1 and 2, it is characterized in that: described electrosmelted magnesite clinker is made up of 0-1mm, 1-3mm and three kinds of specification particle diameters of 3-5mm, accounts for 5-10%, 10-15% and the 5-10% of raw material total mass respectively.
4. the production method of composite corundum carbon brick for ladle according to claim 1 and 2, it is characterized in that: described graphite is the graphite of-195~-197 specifications.
5. the production method of composite corundum carbon brick for ladle according to claim 3, it is characterized in that: described graphite is the graphite of-195~-197 specifications.
6. the production method of composite corundum carbon brick for ladle according to claim 1, it is characterized in that: described spice machine low-speed running is 50-60r/min, is 115-125r/min at a high speed.
CNB2007100924090A 2007-07-11 2007-07-11 Production of composite corundum carbon brick for ladle CN100448801C (en)

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Application Number Priority Date Filing Date Title
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CN100448801C CN100448801C (en) 2009-01-07

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101973772A (en) * 2010-10-28 2011-02-16 昆山思创耐火材料有限公司 High-strength corundum mullite brick for annular silicon steel thermal treatment furnace and manufacture method thereof
CN102775156A (en) * 2011-05-13 2012-11-14 宝山钢铁股份有限公司 Unburned magnesium-aluminum spinel brick
CN102898154A (en) * 2011-07-29 2013-01-30 宝山钢铁股份有限公司 Silicon carbide sliding plate and manufacturing method thereof
CN103420683A (en) * 2012-05-18 2013-12-04 德清县钢友耐火材料有限公司 Tundish low-carbon corundum spinel impact brick and preparation method thereof
CN103570364A (en) * 2012-07-26 2014-02-12 宝山钢铁股份有限公司 Unfired magnesia-alumina spinel brick
CN104072163A (en) * 2014-06-23 2014-10-01 鞍山市和丰耐火材料有限公司 Preparation method of high-strength chrome-free brick for steel-making RH (Ruhstahl Hausen) vacuum refining slot
CN104557086A (en) * 2014-12-30 2015-04-29 北京利尔高温材料股份有限公司 Magnesium-enriched spinel carbon brick for slag-out side of wall of steel ladle and preparation method of magnesium-enriched spinel carbon brick
CN104926326A (en) * 2015-06-10 2015-09-23 浙江自立股份有限公司 Al2O3-MgO-SiC-C brick for ladle working linings and preparation method thereof
CN105272316A (en) * 2015-11-17 2016-01-27 攀枝花钢城集团协力有限公司 Spinel ladle brick and preparation method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6458732B1 (en) * 1999-06-07 2002-10-01 Allied Mineral Products, Inc. Lightweight dry refractory

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101973772A (en) * 2010-10-28 2011-02-16 昆山思创耐火材料有限公司 High-strength corundum mullite brick for annular silicon steel thermal treatment furnace and manufacture method thereof
CN102775156A (en) * 2011-05-13 2012-11-14 宝山钢铁股份有限公司 Unburned magnesium-aluminum spinel brick
CN102898154A (en) * 2011-07-29 2013-01-30 宝山钢铁股份有限公司 Silicon carbide sliding plate and manufacturing method thereof
CN102898154B (en) * 2011-07-29 2014-03-19 宝山钢铁股份有限公司 Silicon carbide sliding plate and manufacturing method thereof
CN103420683A (en) * 2012-05-18 2013-12-04 德清县钢友耐火材料有限公司 Tundish low-carbon corundum spinel impact brick and preparation method thereof
CN103570364A (en) * 2012-07-26 2014-02-12 宝山钢铁股份有限公司 Unfired magnesia-alumina spinel brick
CN103570364B (en) * 2012-07-26 2015-08-26 宝山钢铁股份有限公司 One does not burn Mg-Al spinel brick
CN104072163A (en) * 2014-06-23 2014-10-01 鞍山市和丰耐火材料有限公司 Preparation method of high-strength chrome-free brick for steel-making RH (Ruhstahl Hausen) vacuum refining slot
CN104072163B (en) * 2014-06-23 2015-07-22 鞍山市和丰耐火材料有限公司 Preparation method of high-strength chrome-free brick for steel-making RH (Ruhstahl Hausen) vacuum refining slot
CN104557086A (en) * 2014-12-30 2015-04-29 北京利尔高温材料股份有限公司 Magnesium-enriched spinel carbon brick for slag-out side of wall of steel ladle and preparation method of magnesium-enriched spinel carbon brick
CN104926326A (en) * 2015-06-10 2015-09-23 浙江自立股份有限公司 Al2O3-MgO-SiC-C brick for ladle working linings and preparation method thereof
CN105272316A (en) * 2015-11-17 2016-01-27 攀枝花钢城集团协力有限公司 Spinel ladle brick and preparation method thereof

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