CN106396690A - Novel magnesia-alumina-carbon brick produced by utilizing carbon-containing residual ladle brick, and production method and application thereof - Google Patents
Novel magnesia-alumina-carbon brick produced by utilizing carbon-containing residual ladle brick, and production method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3821—Boron carbides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/401—Alkaline earth metals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
Abstract
The invention discloses a novel magnesia-alumina-carbon brick produced by utilizing a carbon-containing residual ladle brick, and a production method and an application thereof. The magnesia-alumina-carbon brick has a formula concretely comprising the following components in parts by weight: 40 to 60 parts of the carbon-containing residual ladle brick, 20 to 40 parts of magnesite clinker, 5 to 15 parts of alumina, 1 to 6 parts of carbon, 2 to 10 parts of an additive and 3 to 5 parts of an additive binding agent. The magnesia-alumina-carbon brick has the following advantages: using performance is significantly improved; high corrosion resistance and stripping resistance are achieved; through cost accounting, the carbon-containing ladle brick is adopted to recycle, so the novel magnesia-alumina-carbon brick has a certain cost-reducing amplitude compared with a conventional aluminum-magnesium-carbon brick; infinite cyclic utilization of the carbon-containing residual ladle brick is realized; benefits of enterprises and the society are improved; and valuable refractory material resources are saved.
Description
Technical field
The invention belongs to technical field of refractory materials, more particularly, to a kind of magnesia-alumina-carbon brick, further relate to a kind of production method of magnesia-alumina-carbon brick, and application on ladle for this magnesia-alumina-carbon brick.
Background technology
In metallurgy industry, molten steel need to deposit transport with ladle, some ladles also use as External refining vessel, therefore, etch and the souring of 1600 DEG C of high temperature above molten steel and slag will be born inside ladle, use condition is severe, and the working lining at directly contact molten steel and slag position need to use high-quality refractory material.At present, the ladle using is by outer steel shell, support feet and handling gudgeon and hook member composition, it is disposed with heat-insulation layer in outer steel shell, permanent layer and working lining, wherein working lining includes carbon containing slag line lining brick and carbon containing molten bath lining brick, slag lining is built by laying bricks or stones using magnesia carbon brick, molten bath position is built by laying bricks or stones using aluminium-magnesia carbon brick, ladle is in use, erosion by molten steel and slag, increase with ladle access times, slag line molten pool working layer liner is constantly thinning, thinning exceed in certain safe range, ladle is stopped using, working lining liner must be repaired or again build by laying bricks or stones.
Because slag is serious to slag lining etch, generally, one or many slag line lining brick need to be changed in midway, referred to as light maintenance, during last dismounting slag line lining brick, remove together with molten bath lining brick, steel ladle working layer lining brick is built by laying bricks or stones again, referred to as overhaul, the carbon containing remaining ladle brick that big light maintenance removes accounts for the 30-50% that total amount built by laying bricks or stones by working lining carbon containing remaining ladle brick, this partly remaining ladle brick be generally regarded as industrial refuse and dispose, on the one hand not only pollute environment, and cause the refractory material resources serious waste of preciousness；On the other hand, molten bath position adopts aluminium-magnesia carbon brick, and fire resistance is inadequate, and service life is unable to reach the expected replacing time limit, can not meet process for making requirement.
Content of the invention
In order to overcome the defect of prior art, it is an object of the invention to provide the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick makes, carbon containing remaining ladle brick is collected processing and uses, save refractory material, improve the fire resistance at molten bath position, extend the service life of ladle.
In order to realize above-mentioned goal of the invention, the present invention employs the following technical solutions：
The new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick makes, its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：40-60 part；Magnesia：20-40 part；Aluminum oxide：5-15 part；Carbon：1-6 part；Additive：2-10 part；Additional bonding agent：3-5 part.
In the new magnesia-alumina-carbon brick that above-mentioned utilization carbon containing remaining ladle brick makes, alternatively, described additive is metal magnesium powder, magnesia superfine powder, silicon carbide ultrafine powder, metallic aluminium powder, metallic silicon power, boron carbide powder, one of borax or more than one, additive is conducive to improving shaping strength, be conducive to improving product intensity after semi-finished product are dried, be conducive to improving the erosion of anti-molten steel and slag during product uses, this kind remaining refractory material in process of producing product is conducive to utilize in the system interior circulation, it is more beneficial for rear kind remaining refractory material not hydrochemical metamorphism of ladle, keep the strength character stability of this kind remaining refractory material, realize the remaining refractory material Infinite Cyclic regeneration of this kind in the present system, this kind remaining refractory material is made to realize zero-emission, it is a kind of mixing flour.
In the above-mentioned new magnesia-alumina-carbon brick making for above-mentioned utilization carbon containing remaining ladle brick, alternatively, described bonding agent is thermoplastic phenolic resin, thermosetting resin, silicones or magnesia class micro mist.
In the above-mentioned new magnesia-alumina-carbon brick making for above-mentioned utilization carbon containing remaining ladle brick, alternatively, in described composition of raw materials, grain graininess consists of：Particle 10-30%, 180 mesh following fine powder 20-35% in 8mm-1mm coarse granule 35-70%, 1-0mm.
The present invention also provides a kind of production method of the new magnesia-alumina-carbon brick that utilization carbon containing remaining ladle brick makes, including step in detail below：
Processing collected by step S1, carbon containing remaining ladle brick
1), the carbon containing removed remaining ladle brick is concentrated and stack, artificial pick or special equipment pick is adopted to carbon containing remaining ladle brick, then remove the slag on carbon containing remaining ladle brick working lining, then be collected qualified carbon containing remaining ladle brick and be deposited in totally axenic place being dried；
2), carry out break process to compiling qualified carbon containing remaining ladle brick, grade screening according to the rules, by grade quantitative package or be directly entered automatic batching system batch bin in, stand-by；
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：40-60 part；Magnesia：20-40 part；Aluminum oxide：5-15 part；Carbon：1-6 part；Additive：2-10 part；Additional bonding agent：3-5 part；
2), raw material granularity composition：Particle 10-30%, 180 mesh following fine powder 20-35% in 8mm-1mm coarse granule 35-70%, 1-0mm；
Step S3, raw material premix
Will be first pre- mixed for fine powder under 180 mesh in step S2, leave in and be dried in part or batch bin；
Step S4, kneading pug
1), thick, middle particle is initially charged in muller according to composition of raw materials, add the bonding agent kneading of the 30-60% accounting for total binding dosage, be subsequently adding premix fine powder and remaining bonding agent, continue kneading to the good pug of processability, total kneading time is 10-35min, discharging；
2), pug is put in ton pack, and the resting period is less than one day；
Step S5, compressing
1), adopt 1000 tons of press-moldings, and mould is installed according to the brick being molded, pug is molded within the time limiting and finishes；
2), semi-finished product brick qualified for profile is placed on drying cart, spontaneously dries 24-48h；
Step S6, baking
Using light-burned in heat treatment kiln in dry kiln, temperature control, at 140-200 DEG C, is heat-treated 6-20h；
Step S7, test package warehouse-in
After the examination and test of products after baking is qualified, by kind and brick packaging and storage, clearly identify, stand-by.
In above-mentioned steps S2, alternatively, described additive be one of metal magnesium powder, magnesia superfine powder, silicon carbide ultrafine powder, metallic aluminium powder, metallic silicon power, boron carbide powder, borax or more than one.
In above-mentioned steps S2, alternatively, described bonding agent is thermoplastic phenolic resin, thermosetting resin, silicones or magnesia class micro mist.
In above-mentioned steps S6, alternatively, described baking regime is：It is warming up to 100 DEG C by room temperature according to 20 DEG C/h, is incubated 4h, is warming up to 150 DEG C according still further to 10 DEG C/h, be incubated 8h, be warming up to 200 DEG C according still further to 15 DEG C/h, be incubated 8h.
The present invention also provides a kind of application on ladle for new magnesia-alumina-carbon brick of utilization carbon containing remaining ladle brick making.
Compared with prior art, the beneficial effect that the present invention enables at least includes the following aspects：
(1) magnesia-alumina-carbon brick of the present invention adopts carbon containing remaining ladle brick regeneration, realizes carbon containing remaining ladle brick Infinite Cyclic and utilizes, improves enterprise and social benefit, saved the refractory material resources of preciousness；With existing use aluminium-magnesia carbon brick, cost is greatly decreased；
(2) the magnesia-alumina-carbon brick serviceability of the present invention significantly improves, and has higher anti-etch, antistrip performance, and service life at least increases by 5 times；
(3) the new magnesia-alumina-carbon brick of the present invention, from producing, using carbon containing remaining ladle brick collection processing, the Infinite Cyclic process of recycling, is strengthened management, and can achieve the remaining ladle brick zero-emission of carbon containing during producing and using.
Brief description
Technical scheme is described in further detail below with reference to drawings and Examples, it is understood that these accompanying drawings only design for task of explanation, therefore not as the restriction of the scope of the invention.
Fig. 1 is the production method flow chart of the new magnesia-alumina-carbon brick that the present invention utilizes carbon containing remaining ladle brick making.
Specific embodiment
First, it should be noted that, to be illustrated the present invention below by way of example and to be utilized the feature of the production method of new magnesia-alumina-carbon brick and advantage of carbon containing remaining ladle brick making etc., but what all of description was intended merely to illustrate, and should not be construed as the present invention is formed any restriction.In addition, embodiment each mentioned by this paper is described by or implicit arbitrarily single technical characteristic, or shown or implicit arbitrarily single technical characteristic in the drawings, still can proceed to be combined or delete between these technical characteristics (or its equivalent), thus obtaining more other embodiments of the present invention that may not have herein directly to refer to.
Incorporated by reference to reference to Fig. 1, below the embodiment that is just given by this utilizing the new magnesia-alumina-carbon brick that carbon containing remaining ladle brick makes and its production method illustrative with application to the present invention.
Embodiment 1
In this embodiment, the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present invention makes, its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：40 parts；Magnesia：40 parts；Aluminum oxide：10 parts；Carbon：5 parts；Metal magnesium powder：5 parts；Thermoplastic phenolic resin：3 parts, wherein in composition of raw materials, grain graininess consists of：Particle 10%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 70%, 1-0mm.
A kind of as shown in Figure 1 production method flow chart of the new magnesia-alumina-carbon brick that utilization carbon containing remaining ladle brick makes, the method includes step in detail below：
Processing collected by step S1, carbon containing remaining ladle brick
1), the carbon containing removed remaining ladle brick is concentrated and stack, artificial pick or special equipment pick is adopted to carbon containing remaining ladle brick, then remove the slag on carbon containing remaining ladle brick working lining, then be collected qualified carbon containing remaining ladle brick and be deposited in totally axenic place being dried；
2), carry out break process to compiling qualified carbon containing remaining ladle brick, grade screening according to the rules, by grade quantitative package or be directly entered automatic batching system batch bin in, stand-by；
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：40 parts；Magnesia：40 parts；Aluminum oxide：10 parts；Carbon：5 parts；Metal magnesium powder：5 parts；Thermoplastic phenolic resin：3 parts；
2), raw material granularity composition：Particle 10%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 70%, 1-0mm；
Step S3, raw material premix
Will be first pre- mixed for fine powder under 180 mesh in step S2, leave in and be dried in part or batch bin；
Step S4, kneading pug
1), thick, middle particle is initially charged in muller according to composition of raw materials, add account for total thermoplastic phenolic amount of resin 50% thermoplastic phenolic resin kneading, it is subsequently adding premix fine powder and remaining thermoplastic phenolic resin, continue kneading to the good pug of processability, total kneading time is 35min, discharging；
2), pug is put in ton pack, and the resting period is less than one day；
Step S5, compressing
1), adopt 1000 tons of press-moldings, and mould is installed according to the brick being molded, pug is molded within the time limiting and finishes；
2), semi-finished product brick qualified for profile is placed on drying cart, spontaneously dries 24h；
Step S6, baking
Using dry kiln heat treatment, temperature control, at 150 DEG C, fires 8h；Baking regime is：It is warming up to 100 DEG C by room temperature according to 20 DEG C/h, is incubated 4h, is warming up to 150 DEG C according still further to 10 DEG C/h, be incubated 8h, be warming up to 200 DEG C according still further to 15 DEG C/h, be incubated 8h；
Step S7, test package warehouse-in
After the examination and test of products after baking is qualified, by kind and brick packaging and storage, clearly identify, stand-by.
Embodiment 2
In this embodiment, the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present invention makes, its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：50 parts；Magnesia：35 parts；Aluminum oxide：10 parts；Carbon：2 parts；Borax：3 parts；Thermosetting resin：4 parts, wherein in composition of raw materials, grain graininess consists of：Particle 25%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 55%, 1-0mm.
The production method of the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present embodiment makes, its basic step is same as Example 1, and its difference is：
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：50 parts；Magnesia：35 parts；Aluminum oxide：10 parts；Carbon：2 parts；Borax：3 parts；Thermosetting resin：4 parts；
2), raw material granularity composition：Particle 25%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 55%, 1-0mm；
Step S6, baking
Using dry kiln heat treatment, temperature control, at 200 DEG C, is heat-treated 8h.
Embodiment 3
In this embodiment, the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present invention makes, its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：60 parts；Magnesia：20 parts；Aluminum oxide：6 parts；Carbon：6 parts；Boron carbide powder：8 parts；Silicones：5 parts, wherein in composition of raw materials, grain graininess consists of：Particle 15%, the following fine powder of 180 mesh 25% in 8mm-1mm coarse granule 60%, 1-0mm.
The production method of the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present embodiment makes, its basic step is same as Example 1, and its difference is：
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：60 parts；Magnesia：20 parts；Aluminum oxide：6 parts；Carbon：6 parts；Boron carbide powder：8 parts；Silicones：5 parts；
2), raw material granularity composition：Particle 15%, the following fine powder of 180 mesh 25% in 8mm-1mm coarse granule 60%, 1-0mm；
Step S6, baking
Using dry kiln heat treatment, temperature control, at 180 DEG C, is heat-treated 12h.
Embodiment 4
In this embodiment, the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present invention makes, its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：45 parts；Magnesia：40 parts；Aluminum oxide：5 parts；Carbon：3 parts；Aluminium silicon class：7 parts；Thermoplastic phenolic resin：3.5 parts, wherein in composition of raw materials, grain graininess consists of：Particle 30%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 50%, 1-0mm.
The production method of the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present embodiment makes, its basic step is same as Example 6, and its difference is：
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：45 parts；Magnesia：40 parts；Aluminum oxide：Part；Carbon：Part；Aluminium silicon carbide class：7 parts；Thermoplastic phenolic resin：3.5 part；
2), raw material granularity composition：Particle 30%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 50%, 1-0mm；
Step S6, baking
Using dry kiln heat treatment, temperature control, at 160 DEG C, is heat-treated 18h.
Embodiment 5
In this embodiment, the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present invention makes, its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：55 parts；Magnesia：20 parts；Aluminum oxide：15 parts；Carbon：2 parts；Silicon class：3 parts；Magnesia class micro mist：5 parts, wherein in composition of raw materials, grain graininess consists of：Particle 23%, the following fine powder of 180 mesh 32% in 8mm-1mm coarse granule 45%, 1-0mm.
The production method of the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present embodiment makes, its basic step is same as Example 1, and its difference is：
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：55 parts；Magnesia：20 parts；Aluminum oxide：15 parts；Carbon：2 parts；Silicon class：3 parts；Magnesia class micro mist：5 parts；
2), raw material granularity composition：Particle 23%, the following fine powder of 180 mesh 32% in 8mm-1mm coarse granule 45%, 1-0mm；
Step S6, baking
Using dry kiln heat treatment, temperature control, at 170 DEG C, is heat-treated 15h.
Embodiment 6
In this embodiment, the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present invention makes, its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：58 parts；Magnesia：30 parts；Aluminum oxide：5 parts；Carbon：2 parts；Carbon compound：5 parts；Thermoplastic phenolic resin：3.5 parts, wherein in composition of raw materials, grain graininess consists of：Particle 20%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 60%, 1-0mm.
The production method of the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick of the present embodiment makes, its basic step is same as Example 1, and its difference is：
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：60 parts；Magnesia：18 parts；Aluminum oxide：8 parts；Carbon：4 parts；Magnesia carbon compound：10 parts；Thermoplastic phenolic resin：3.5 part；
2), raw material granularity composition：Particle 20%, the following fine powder of 180 mesh 20% in 8mm-1mm coarse granule 60%, 1-0mm；
Step S6, baking
Using dry kiln heat treatment, temperature control, at 190 DEG C, is heat-treated 15h.
The new magnesia-alumina-carbon brick that the above embodiment of the present invention 1 to 6 is obtained is applied to the molten bath position under certain special steel company ladle slag line brick, former six layers of aluminium-magnesia carbon brick are built by laying bricks or stones, the new magnesia-alumina-carbon brick produced, at external refining ladle molten bath position, makees contrast use twice with the aluminium-magnesia carbon brick in producing.
For the first time, the upper two-layer of the six layers of aluminium-magnesia carbon brick in former molten bath position, is replaced with new magnesia-alumina-carbon brick, and wherein, same layer minimal amount of adjustment brick is still built by laying bricks or stones with aluminium-magnesia carbon brick, finds before ladle light maintenance, and being significantly recessed occurs in adjustment brick aluminium-magnesia carbon brick；Molten bath top magnesia-alumina-carbon brick, compared with the aluminium-magnesia carbon brick of molten bath bottom, highlights about 20mm；
Second, contrary with first time, upper two-layer aluminium-magnesia carbon brick, built by laying bricks or stones with new magnesia-alumina-carbon brick for lower four layers, orlop mixes block a small amount of aluminium-magnesia carbon brick, and after new magnesia-alumina-carbon brick and aluminium-magnesia carbon brick build use by laying bricks or stones, before light maintenance, comparing result is extremely obvious, significantly being recessed occurs in aluminium-magnesia carbon brick, and new magnesia-alumina-carbon brick shows preferable advantage and uses leeway.
The magnesia-alumina-carbon brick serviceability of the present invention significantly improves, and has higher anti-etch, antistrip performance, and service life at least increases by 5 times.
Claims (9)
1. the new magnesia-alumina-carbon brick that a kind of utilization carbon containing remaining ladle brick makes is it is characterised in that its formula is specific as follows by weight ratio：Carbon containing remaining ladle brick：40-60 part；Magnesia：20-40 part；Aluminum oxide：5-15 part；Carbon：1-6 part；Additive：2-10 part；Bonding agent：3-5 part.
2. utilization carbon containing according to claim 1 remaining ladle brick makes new magnesia-alumina-carbon brick it is characterised in that described additive be one of magnesium class, boron class, carbon compound, aluminium class and silicon class or more than one.
3. the new magnesia-alumina-carbon brick that utilization carbon containing remaining ladle brick according to claim 1 makes is it is characterised in that described bonding agent is thermoplastic phenolic resin, thermosetting resin, silicones or magnesia class micro mist.
4. according to claim 1 using carbon containing remaining ladle brick make new magnesia-alumina-carbon brick it is characterised in that in described composition of raw materials grain graininess consist of：Particle 10-30%, 180 mesh following fine powder 20-35% in 8mm-1mm coarse granule 35-70%, 1-0mm.
5. a kind of production method of the new magnesia-alumina-carbon brick that utilization carbon containing remaining ladle brick according to Claims 1-4 makes is it is characterised in that include step in detail below：
Processing collected by step S1, carbon containing remaining ladle brick
1), the carbon containing removed remaining ladle brick is concentrated and stack, artificial pick or special equipment pick is adopted to carbon containing remaining ladle brick, then remove the slag on carbon containing remaining ladle brick working lining, then be collected qualified carbon containing remaining ladle brick and be deposited in totally axenic place being dried；
2), carry out break process to compiling qualified carbon containing remaining ladle brick, grade screening according to the rules, by grade quantitative package or be directly entered automatic batching system batch bin in, stand-by；
Step S2, raw material are prepared
1), prepared according to the proportioning of following raw material：Carbon containing remaining ladle brick：40-60 part；Magnesia：20-40 part；Aluminum oxide：5-15 part；Carbon：1-6 part；Additive：2-10 part；Bonding agent：3-5 part；
2), raw material granularity composition：Particle 10-30%, 180 mesh following fine powder 20-35% in 8mm-1mm coarse granule 35-70%, 1-0mm；
Step S3, raw material premix
Will be first pre- mixed for fine powder under 180 mesh in step S2, leave in and be dried in part or batch bin；
Step S4, kneading pug
1), thick, middle particle is initially charged in muller according to composition of raw materials, add the bonding agent kneading of the 30-60% accounting for total binding dosage, be subsequently adding premix fine powder and remaining bonding agent, continue kneading to good shaping pug performance, total kneading time is 10-35min, discharging；
2), pug is put in ton pack, and the resting period is less than one day；
Step S5, compressing
1), adopt 1000 tons of press-moldings, and mould is installed according to the brick being molded, pug is molded within the time limiting and finishes；
2), semi-finished product brick qualified for profile is placed on drying cart, spontaneously dries 24-48h；
Step S6, baking
Using dry kiln heat treatment, temperature control, at 140-200 DEG C, is heat-treated 6-20h；
Step S7, test package warehouse-in
After the examination and test of products after baking is qualified, by kind and brick packaging and storage, clearly identify, stand-by.
6. the production method of the new magnesia-alumina-carbon brick that utilization carbon containing according to claim 5 remaining ladle brick makes is it is characterised in that in described step S2, described additive be one of magnesium class, boron class, carbon compound, aluminium class and silicon class or more than one.
7. the production method of the new magnesia-alumina-carbon brick that utilization carbon containing remaining ladle brick according to claim 5 makes is it is characterised in that in described step S2, described bonding agent is thermoplastic phenolic resin, thermosetting resin, silicones or magnesia class micro mist.
8. the production method of the new magnesia-alumina-carbon brick that utilization carbon containing remaining ladle brick according to claim 5 makes is it is characterised in that in described step S6, described baking regime is：It is warming up to 100 DEG C by room temperature according to 20 DEG C/h, is incubated 4h, is warming up to 150 DEG C according still further to 10 DEG C/h, be incubated 8h, be warming up to 200 DEG C according still further to 15 DEG C/h, be incubated 8h.
9. a kind of application on ladle for the new magnesia-alumina-carbon brick that utilization carbon containing remaining ladle brick according to Claims 1-4 makes.
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