CN105367099A - Environmental-friendly leakproof RH refining furnace dip pipe inner core - Google Patents
Environmental-friendly leakproof RH refining furnace dip pipe inner core Download PDFInfo
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- CN105367099A CN105367099A CN201510926182.XA CN201510926182A CN105367099A CN 105367099 A CN105367099 A CN 105367099A CN 201510926182 A CN201510926182 A CN 201510926182A CN 105367099 A CN105367099 A CN 105367099A
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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
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/005—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing gelatineous or gel forming binders, e.g. gelatineous Al(OH)3, sol-gel binders
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
Abstract
The invention discloses an environmental-friendly leakproof RH refining furnace dip pipe inner core. The environmental-friendly leakproof RH refining furnace dip pipe inner core is arranged on the inner side of a tubular steel liner main body of a dip pipe; an inner core flame-retardant layer is formed from a prefabticated member structure or an integral casting structure; and the inner core flame-retardant layer comprises, by weight, 45 to 60% of magnesia aggregate, 15 to 25% of magnesium rich spinel aggregate, 15 to 25% of a mixed fine powder, 5 to 10% of a micro powder, 3 to 7% of a binder, 0.1 to 0.5% of a water reducing agent, and 0.05 to 0.15% of an organic explosion-proof fiber. The environmental-friendly leakproof RH refining furnace dip pipe inner core is formed from the magnesia spinel zirconia-based prefabticated member structure or the integral casting structure instead of conventional magnesite-chrome bricks, so that falling of magnesite-chrome brick inner cores in application processes caused by erosion of brick cracks and impact effect of molten steel and gas is avoided effectively; dip pipe safety is improved greatly; service life is prolonged greatly; environmental pollution, and harm on human health caused by hexavalent chromium in the magnesite-chrome bricks are avoided; complex processing procedures of the prior art are avoided; production efficiency is increased greatly; and manufacturing cost is reduced.
Description
Technical field
The present invention relates to Refractory For Steelmaking technical field, refer to a kind of environment protective leakage-resisting formula RH refining furnace soaking tub inner core particularly.
Background technology
One of indispensable visual plant of high quality steel produced in external refining process by RH refining furnace.Soaking tub is as the passage passing in and out molten steel in RH refining furnace, and subject the effects such as molten steel washes away at a high speed, the violent erosion of extremely cold very hot and slag, is the key link in restriction RH refining furnace life-span.
The internal layer of traditional RH soaking tub mainly uses the layering of leaching salt electric smelting recombined magnesia-chrome brick to build by laying bricks or stones, and this structure exists following problem: the sexavalent chrome 1) in magnesia chrome brick all can cause environmental pollution in production and use procedure, harm health of human body; 2) magnesia chrome brick usually needs experience batch mixing, shaping, high-temperature calcination, punches, invades salt, polishing, assembling, entirety and the operation such as to polish again, the overall inner core making soaking tub assembles with box hat again, finally constructs amorphous refractory and makes soaking tub product.Its production process puts into operating procedure complexity, and the production cycle is longer, and production efficiency is low; 3) magnesia chrome brick inner core is in use owing to having gap between brick and brick, be easily etched and because of molten steel and gas shock action and come off, even cause the danger of wearing steel.
Publication number is that the Chinese utility model patent of CN202786321U discloses a kind of RH refining furnace soaking tub, although the prefabricated component that its inner core adopts corundum spinelle cement-free castable to prepare overcomes the problem existing for above-mentioned magnesia chrome brick, it does not provide concrete preparation scheme.
Summary of the invention
The object of the present invention is to provide a kind of environment protective leakage-resisting formula RH refining furnace soaking tub inner core, it is environment friendly and pollution-free, can avoid that brickwork joint bleed-out leaks gas, high life, and has the excellent performance of flushing of resistance to molten steel, good anti-scour property and good thermal shock resistance energy.
For achieving the above object, environment protective leakage-resisting formula RH refining furnace soaking tub inner core designed by the present invention, be arranged on inside this soaking tub steel courage body in tubular construction, adopt preform structure or integrated poured structure to form inner core flame retardant coating, its special character is: in described inner core flame retardant coating, each component weight percent is:
Wherein: mixing fine powders is the arbitrary proportion mixture of the electrosmelted magnesite clinker of MgO weight content>=97%, magnesium-rich spinel and zirconium dioxide, its particle diameter≤0.088mm; Micro mist is SiO
2the arbitrary proportion mixture of micro mist and active MgO micro mist, its particle diameter≤10 μm.
Further, described magnesia aggregate is one or both mixture in the electrosmelted magnesite clinker of MgO weight content >=97% and the magnesite clinker of MgO weight content >=97%, the particle diameter≤12mm of described magnesia aggregate.
Again further, described magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 13 ~ 17%, 28 ~ 32%, 18 ~ 22%, 18 ~ 22% and 13 ~ 15%.
Further, in described magnesium-rich spinel aggregate, MgO weight content is 28 ~ 33%, Al
2o
3weight content is 65 ~ 70%, the particle diameter≤5mm of described magnesium-rich spinel aggregate.
Again further, described magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 36 ~ 44%, 28 ~ 32% and 28 ~ 32%.
Further, in described mixing fine powders, the blending ratio of electrosmelted magnesite clinker, magnesium-rich spinel and zirconium dioxide is 1.5 ~ 2.5: 0.5 ~ 1.5: 0.5 ~ 1.5.
Further, in described micro mist, SiO
2the blending ratio of micro mist and active MgO micro mist is 1: 4 ~ 6.
Again further, described SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In described active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm.
Further, described bonding agent is the mixture of one or both arbitrary proportions in pure calcium aluminate cement, hydrated aluminum oxide, silicon sol.
Further, described water reducer is the mixture of one or more arbitrary proportions in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, polycarboxylic acids dehydragent.
The invention has the advantages that: adopt magnesia Zirconium spinel matter prefabricated component or integrated poured mode to replace traditional magnesia chrome brick as soaking tub inner core, effectively prevent magnesia chrome brick inner core in use because of the defect that brickwork joint is easily etched or come off because of molten steel and gas percussion effect, drastically increase safety in utilization and the work-ing life of soaking tub, the sexavalent chrome simultaneously avoided in magnesia chrome brick can cause the problem of environmental pollution, harm health of human body in production and use procedure; Moreover, avoid the batch mixing of magnesia chrome brick in traditional technology, shaping, high-temperature calcination, punch, invade the complicated procedures of forming such as salt, polishing, assembling, drastically increase production efficiency, reduce manufacturing cost.The time that the present invention prepares soaking tub is only 70% of traditional magnesia chrome brick inner core soaking tub; In the present invention, inner core is magnesia Zirconium spinel matter, and the corundum spinel adopted in unconventional process or corundum, there is very excellent thermal shock resistance and anti-scour property, have more the volume stability in excellent high temperature high vacuum Working environment, the work-ing life of RH soaking tub can be significantly improved.
Accompanying drawing explanation
The application state schematic diagram of Fig. 1 to be environment protective leakage-resisting formula RH refining furnace soaking tub inner core of the present invention be preform structure;
The application state schematic diagram of Fig. 2 to be environment protective leakage-resisting formula RH refining furnace soaking tub inner core of the present invention be integrated poured structure;
In figure, ring flange 1, steel courage body 2, inner core flame retardant coating 4, the gap gravity flow bed of material 5, outsourcing flame retardant coating 6 (wherein: top refractory casting bed of material 6a, bottom refractory casting bed of material 6b), molten steel 7.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1, a kind of environment protective leakage-resisting formula RH refining furnace soaking tub inner core of the present invention, be arranged on inside this soaking tub steel courage body 2 in tubular construction, adopt preform structure to form inner core flame retardant coating 4, be filled with gap between itself and steel courage body 2 inwall and flow automatically the bed of material 5.Steel courage body 2 top is provided with the ring flange 1 be connected with vacuum tank; Have outsourcing flame retardant coating 6 in steel courage body 2 arranged outside, outsourcing flame retardant coating 6 is combined by exposed aerial top refractory casting bed of material 6a and the bottom refractory casting bed of material 6b be immersed in molten steel 7.
In the inner core flame retardant coating 4 of above-mentioned preform structure, each component weight percent is:
Wherein, magnesia aggregate is the electrosmelted magnesite clinker of MgO weight content >=97%, and magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 13%, 32%, 18%, 22% and 15%;
In magnesium-rich spinel aggregate, MgO weight content: 28 ~ 33%, Al
2o
3weight content: 65 ~ 70%, magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 36%, 32% and 32%;
Mixing fine powders is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97%, magnesium-rich spinel and zirconium dioxide, and blending ratio is 2: 1: 1, its particle diameter≤0.088mm;
Micro mist is SiO
2the mixture of micro mist and active MgO micro mist, its blending ratio is 1: 4; Further, SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm;
Bonding agent is pure calcium aluminate cement;
Water reducer is the polycarboxylic acids dehydragent ADS1/ADW1 that Qingdao An Mai company produces.
Embodiment 2:
As shown in Figure 1, the inner core flame retardant coating 4 in the present embodiment is identical with embodiment 1, still adopts preform structure.
In the inner core flame retardant coating 4 of above-mentioned preform structure, each weight percentages of components is:
Magnesia aggregate: 45%;
Magnesium-rich spinel aggregate: 25%;
Mixing fine powders: 17.9%;
Micro mist: 4.85%;
Bonding agent: 7%;
Water reducer: 0.1%;
Organic explosion-proof fiber: 0.15%;
Wherein, magnesia aggregate is the magnesite clinker of MgO weight content >=97%, and magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 17%, 28%, 22%, 20% and 13%;
In magnesium-rich spinel aggregate, MgO weight content: 28 ~ 33%, Al
2o
3weight content: 65 ~ 70%, magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 44%, 28% and 28%;
Mixing fine powders is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97%, magnesium-rich spinel and zirconium dioxide, and blending ratio is 2: 1: 1, its particle diameter≤0.088mm;
Micro mist is SiO
2the mixture of micro mist and active MgO micro mist, its blending ratio is 1: 6; Further, SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm;
Bonding agent is the mixture in hydrated aluminum oxide and silicon sol, and its blending ratio is 1: 1;
Water reducer is Sodium hexametaphosphate 99.
Embodiment 3:
As shown in Figure 1, the inner core flame retardant coating 4 in the present embodiment is identical with embodiment 1, still adopts preform structure.
In the inner core flame retardant coating 4 of above-mentioned preform structure, each weight percentages of components is:
Magnesia aggregate: 50%;
Magnesium-rich spinel aggregate: 20%;
Mixing fine powders: 16.7%;
Micro mist: 6.9%;
Bonding agent: 6%;
Water reducer: 0.3%;
Organic explosion-proof fiber: 0.1%;
Wherein, magnesia aggregate is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97% and the magnesite clinker of MgO weight content >=97%, and its blending ratio is 1: 1; Magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 15%, 30%, 20%, 20% and 15%;
In magnesium-rich spinel aggregate, MgO weight content: 28 ~ 33%, Al
2o
3weight content: 65 ~ 70%, magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 40%, 30% and 30%;
Mixing fine powders is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97%, magnesium-rich spinel and zirconium dioxide, and blending ratio is 2: 1: 1, its particle diameter≤0.088mm;
Micro mist is SiO
2the mixture of micro mist and active MgO micro mist, its blending ratio is 1: 5; Further, SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm;
Bonding agent is silicon sol;
Water reducer is the mixture of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, and its blending ratio is 1: 2.
Embodiment 4:
As shown in Figure 2, another kind of environment protective leakage-resisting formula RH refining furnace soaking tub inner core of the present invention, it is substantially the same manner as Example 1, and difference just adopts integrated poured structure to form inner core flame retardant coating 4, to flow automatically the bed of material 5 between itself and steel courage body 2 inwall without the need to blind.
In the inner core flame retardant coating 4 of above-mentioned integrated poured structure, each weight percentages of components is:
Magnesia aggregate: 55%;
Magnesium-rich spinel aggregate: 16%;
Mixing fine powders: 16.7%;
Micro mist: 7.85%;
Bonding agent: 4%;
Water reducer: 0.3%;
Organic explosion-proof fiber: 0.15%;
Wherein, magnesia aggregate is the mixture of the magnesite clinker of MgO weight content >=97% and the electrosmelted magnesite clinker of MgO weight content >=97%, and its blending ratio is 2: 1; Magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 14%, 31%, 19%, 21% and 15%;
In magnesium-rich spinel aggregate, MgO weight content: 28 ~ 33%, Al
2o
3weight content: 65 ~ 70%, magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 42%, 28% and 30%;
Mixing fine powders is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97%, magnesium-rich spinel and zirconium dioxide, and blending ratio is 2: 1: 1, its particle diameter≤0.088mm;
Micro mist is SiO
2the mixture of micro mist and active MgO micro mist, its blending ratio is 1: 5; Further, SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm;
Bonding agent is the mixture of pure calcium aluminate cement and silicon sol, and its blending ratio is 2: 1;
Water reducer is tripoly phosphate sodium STPP.
Embodiment 5:
As shown in Figure 2, the inner core flame retardant coating 4 in the present embodiment is identical with embodiment 4, adopts integrated poured structure.
In the inner core flame retardant coating 4 of above-mentioned integrated poured structure, each weight percentages of components is:
Magnesia aggregate: 46%;
Magnesium-rich spinel aggregate: 25%;
Mixing fine powders: 14.7%;
Micro mist: 6.9%;
Bonding agent: 7%;
Water reducer: 0.3%;
Organic explosion-proof fiber: 0.1%;
Wherein, magnesia aggregate is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97% and the magnesite clinker of MgO weight content >=97%, and its blending ratio is 1.5: 1; Magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 16%, 29%, 21%, 20% and 14%;
In magnesium-rich spinel aggregate, MgO weight content: 28 ~ 33%, Al
2o
3weight content: 65 ~ 70%, magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 41%, 29% and 30%;
Mixing fine powders is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97%, magnesium-rich spinel and zirconium dioxide, and blending ratio is 2: 1: 1, its particle diameter≤0.088mm;
Micro mist is SiO
2the mixture of micro mist and active MgO micro mist, its blending ratio is 1: 4; Further, SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm;
Bonding agent is silicon sol;
Water reducer is Sodium hexametaphosphate 99.
Embodiment 6:
As shown in Figure 2, the inner core flame retardant coating 4 in the present embodiment is also identical with embodiment 4, still adopts integrated poured structure.
In the inner core flame retardant coating 4 of above-mentioned integrated poured structure, each weight percentages of components is:
Magnesia aggregate: 52%;
Magnesium-rich spinel aggregate: 20%;
Mixing fine powders: 18%;
Micro mist: 5%;
Bonding agent: 5%;
Water reducer: 0.8%;
Organic explosion-proof fiber: 0.08%;
Wherein, magnesia aggregate is the electrosmelted magnesite clinker of MgO weight content >=97%, and magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 15%, 30%, 22%, 20% and 13%;
In magnesium-rich spinel aggregate, MgO weight content: 28 ~ 33%, Al
2o
3weight content: 65 ~ 70%, magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 43%, 29% and 28%;
Mixing fine powders is the mixture of the electrosmelted magnesite clinker of MgO weight content >=97%, magnesium-rich spinel and zirconium dioxide, and blending ratio is 2: 1: 1, its particle diameter≤0.088mm;
Micro mist is SiO
2the mixture of micro mist and active MgO micro mist, its blending ratio is 1: 4; Further, SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm;
Bonding agent is hydrated aluminum oxide;
Water reducer is the polycarboxylic acids dehydragent ADS1/ADW1 of Qingdao An Mai company.
Finally, it should be pointed out that above embodiment is only the more representational example of the present invention.Obviously, the invention is not restricted to above-described embodiment, many distortion can also be had.Every according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all should think and belong to protection scope of the present invention.
Claims (10)
1. an environment protective leakage-resisting formula RH refining furnace soaking tub inner core, be arranged on this soaking tub steel courage body (2) inner side in tubular construction, adopt preform structure or integrated poured structure to form inner core flame retardant coating (4), it is characterized in that: in described inner core flame retardant coating (4), each component weight percent is:
Wherein: mixing fine powders is the arbitrary proportion mixture of the electrosmelted magnesite clinker of MgO weight content>=97%, magnesium-rich spinel and zirconium dioxide, its particle diameter≤0.088mm; Micro mist is SiO
2the arbitrary proportion mixture of micro mist and active MgO micro mist, its particle diameter≤10 μm.
2. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 1, it is characterized in that: described magnesia aggregate is one or both mixture in the electrosmelted magnesite clinker of MgO weight content >=97% and the magnesite clinker of MgO weight content >=97%, the particle diameter≤12mm of described magnesia aggregate.
3. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 2, is characterized in that: described magnesia aggregate is divided into by size: 8mm < particle diameter≤12mm, 5mm < particle diameter≤8mm, 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm five gratings; The weight percent that each grade fits in magnesia aggregate is followed successively by: 13 ~ 17%, 28 ~ 32%, 18 ~ 22%, 18 ~ 22% and 13 ~ 15%.
4. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 1, is characterized in that: in described magnesium-rich spinel aggregate, and MgO weight content is 28 ~ 33%, Al
2o
3weight content is 65 ~ 70%, the particle diameter≤5mm of described magnesium-rich spinel aggregate.
5. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 4, is characterized in that: described magnesium-rich spinel aggregate is divided into by size: 3mm < particle diameter≤5mm, 1mm < particle diameter≤3mm and 0mm < particle diameter≤1mm tri-gratings; The weight percent that each grade fits in magnesium-rich spinel aggregate is followed successively by: 36 ~ 44%, 28 ~ 32% and 28 ~ 32%.
6. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 1, it is characterized in that: in described mixing fine powders, the blending ratio of electrosmelted magnesite clinker, magnesium-rich spinel and zirconium dioxide is 1.5 ~ 2.5: 0.5 ~ 1.5: 0.5 ~ 1.5.
7. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 1, is characterized in that: in described micro mist, SiO
2the blending ratio of micro mist and active MgO micro mist is 1: 4 ~ 6.
8. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 7, is characterized in that: described SiO
2in micro mist, SiO
2weight content>=96%, particle diameter≤5 μm; In described active MgO micro mist, MgO weight content>=96%, particle diameter≤2 μm.
9. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 1, is characterized in that: described bonding agent is the mixture of one or both arbitrary proportions in pure calcium aluminate cement, hydrated aluminum oxide, silicon sol.
10. environment protective leakage-resisting formula RH refining furnace soaking tub inner core according to claim 1, is characterized in that: described water reducer is the mixture of one or more arbitrary proportions in tripoly phosphate sodium STPP, Sodium hexametaphosphate 99, polycarboxylic acids dehydragent.
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| CN201510926182.XA CN105367099B (en) | 2015-12-14 | 2015-12-14 | Environment protective leakage-resisting formula RH refining furnace dip pipe inner cores |
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| CN201510926182.XA CN105367099B (en) | 2015-12-14 | 2015-12-14 | Environment protective leakage-resisting formula RH refining furnace dip pipe inner cores |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809808A (en) * | 2017-11-20 | 2019-05-28 | 鞍山市和丰耐火材料有限公司 | A kind of smelting fine work steel invades performance magnesia-spinel brick and preparation method thereof with resistance to slag |
| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
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| CN113943167A (en) * | 2021-12-02 | 2022-01-18 | 湖南湘钢瑞泰科技有限公司 | RH dip pipe castable and preparation method thereof |
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| CN105367099B (en) | 2018-02-09 |
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