CN113800890A - Composition and forming method of high-oxygen slag scouring resistant composite magnesia carbon brick - Google Patents
Composition and forming method of high-oxygen slag scouring resistant composite magnesia carbon brick Download PDFInfo
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- CN113800890A CN113800890A CN202110899823.2A CN202110899823A CN113800890A CN 113800890 A CN113800890 A CN 113800890A CN 202110899823 A CN202110899823 A CN 202110899823A CN 113800890 A CN113800890 A CN 113800890A
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- magnesia carbon
- magnesia
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 268
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 134
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 102
- 239000011449 brick Substances 0.000 title claims abstract description 79
- 239000000203 mixture Substances 0.000 title claims abstract description 35
- 239000002893 slag Substances 0.000 title claims abstract description 33
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 25
- 239000001301 oxygen Substances 0.000 title claims abstract description 25
- 238000009991 scouring Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 62
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 62
- 239000002994 raw material Substances 0.000 claims abstract description 36
- 239000002245 particle Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000010439 graphite Substances 0.000 claims abstract description 23
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000000047 product Substances 0.000 claims description 84
- 238000003756 stirring Methods 0.000 claims description 61
- 239000007767 bonding agent Substances 0.000 claims description 54
- 239000011863 silicon-based powder Substances 0.000 claims description 48
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 18
- 150000001450 anions Chemical class 0.000 claims description 9
- 239000012466 permeate Substances 0.000 claims description 9
- HJELPJZFDFLHEY-UHFFFAOYSA-N silicide(1-) Chemical compound [Si-] HJELPJZFDFLHEY-UHFFFAOYSA-N 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 10
- 239000010959 steel Substances 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 9
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010923 batch production Methods 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 230000035939 shock Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5035—Silica
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- 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
-
- 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
- C04B2235/425—Graphite
-
- 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
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a composition and a forming method of a high-oxygen slag scouring resistant composite magnesia carbon brick, and particularly relates to the technical field of magnesia carbon bricks, wherein the magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles, 10-25 parts of fused magnesia fine powder, 10-18 parts of carbon raw materials, 10-20 parts of flaky graphite, 2-4 parts of a binding agent, and an antioxidant part, and is characterized in that the original magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles. The oxidation resistance of the magnesia carbon brick is improved when the magnesia carbon brick is contacted with molten steel and slag in the production and manufacturing process of the magnesia carbon brick, the service life of the magnesia carbon brick is prolonged on the basis of the original magnesia carbon brick production, the oxidation-resistant coating is coated outside the magnesia carbon brick, and oxidation-resistant materials are infiltrated into the magnesia carbon brick, so that the oxidation resistance of the magnesia carbon brick is improved, the high temperature resistance and the hardness of the magnesia carbon brick are improved, the cracking of the magnesia carbon brick is reduced, and the batch production can be carried out.
Description
Technical Field
The invention belongs to the technical field of magnesia carbon bricks, and particularly relates to a composition and a forming method of a composite magnesia carbon brick resistant to high-oxygen slag scouring.
Background
The magnesia carbon brick mainly comprises magnesia (the main chemical components are magnesia) and carbon, the melting point of the magnesia is very high and reaches 2800 ℃, the magnesia has very strong high temperature resistance, but the magnesia has poor thermal shock resistance and slag penetration resistance, the melting point of a carbon material represented by graphite is higher, the magnesia carbon brick has low thermal expansion coefficient and very excellent thermal shock resistance, molten steel and steel slag are not easy to infiltrate at high temperature, the magnesia carbon brick is a refractory material which is formed by compounding the magnesia carbon brick and the steel slag according to a certain proportion and has excellent comprehensive performance, and the magnesia carbon brick is mainly used as a lining of a steelmaking container and can be directly contacted with the molten steel and the slag.
However, the parts contacting molten steel and slag are easily oxidized, so that the service life is reduced, or the parts fall off to influence the purity of the molten steel, so that the composite magnesia carbon brick capable of resisting the scouring of high-oxygen slag is required to be designed.
Disclosure of Invention
The invention provides a composition and a forming method of a high-oxygen slag scouring resistant composite magnesia carbon brick, and aims to solve the problems that the part contacting molten steel and slag is easily oxidized, so that the service life is shortened, or the purity of the molten steel is influenced by falling off.
The invention is realized in such a way, and provides the following technical scheme: a composite magnesia carbon brick resistant to high-oxygen slag scouring comprises an original magnesia carbon brick and an antioxidant part, wherein the original magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles, 10-25 parts of fused magnesia fine powder, 10-18 parts of carbon raw material, 10-20 parts of flaky graphite and 2-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 1-5 parts of silicon powder, 30-50 parts of anion water and 3-7 parts of silicon powder bonding agent.
In a preferred embodiment, the original magnesia carbon brick comprises the following components in parts by weight: 70-75 parts of fused magnesia particles, 15-20 parts of fused magnesia fine powder, 15-18 parts of carbon raw material, 15-20 parts of flaky graphite and 3-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 2-5 parts of silicon powder and anion water; 40-50 parts of silicon powder bonding agent and 4-7 parts of silicon powder bonding agent.
In a preferred embodiment, the original magnesia carbon brick comprises the following components in parts by weight: 70 parts of fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw materials, 18 parts of flake graphite and 4 parts of bonding agents;
the antioxidant part comprises the following components in parts by weight: 4 parts of silicon powder and anion water; 45 parts of silicon powder bonding agent and 6 parts of silicon powder bonding agent.
A method for forming a composite magnesia carbon brick resistant to high-oxygen slag scouring comprises the following specific processing steps:
the method comprises the following steps: preheating: preheating 70 parts of raw material fused magnesia particles to 40 ℃ to ensure normal mixing, heating 4 parts of a bonding agent to 35 ℃, and increasing the flow of the bonding agent;
step two: mixing: mixing 70 parts of heated raw material fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw material and 18 parts of flaky graphite according to a proportion to obtain a mixed material A, and adding the mixed material A into a stirrer to stir to obtain a processed material B;
step three: stirring: adding the processing material B obtained in the step one into a stirrer, adding 50% of heated bonding agent, and stirring at the speed of 60-85 rpm for 5-10 minutes by the stirrer to obtain an unfinished product C;
step four: entering a mold: pouring the unfinished product C obtained in the step three into a mold, wherein the size of the mold can be selected according to the specific size, and pressing the unfinished product C poured into the mold to ensure that the unfinished product C is pressed and molded, so that the unfinished product C is completely filled into the mold to obtain a processed product D;
step five: antioxidant preparation: putting 4 parts of silicon powder into a stirring kettle, adding 50% of anion water and 6 parts of silicon powder binding agent, respectively pouring into the stirring kettle, stirring at the speed of 75-80 rpm by the stirring kettle for 10-15 minutes, and stirring to be thick to obtain an antioxidant E;
step six: combining: slightly pouring the processed product C obtained in the fourth step out of the mold, taking out a proper amount of the antioxidant body E, and uniformly coating the antioxidant body E on the outer part of the processed product C through a brush to obtain a mixture F;
step seven: standing: placing the mixture F on a tray and standing for 15-20 minutes to enable the antioxidant E to permeate into the processed product C, and avoiding dust falling onto the mixture F during standing;
step eight: and (3) sintering: placing the mixture F coated with the antioxidant E on a tray, and roasting the tray in a furnace at 300-500 ℃ for 30min to obtain a finished product G;
step nine: air cooling: and D, taking out the finished product G obtained in the step eight, placing the finished product G outside for air cooling, and taking the finished product G by using a clamp when the finished product G is taken out to avoid high-temperature burn.
In a preferred embodiment, the binder is one of a phenolic resin or asphalt.
In a preferred embodiment, the stirring speed of the stirrer in the third step is 75 revolutions per minute, and the stirring time is 8 minutes.
In a preferred embodiment, the stirring speed of the stirring tank in the fifth step is 75 rpm, and the stirring time is 12 minutes.
In a preferred embodiment, the mixture F in the seventh step is left for 20 minutes, and the calcination temperature in the eighth step is 400 ℃.
In a preferred embodiment, the antioxidant E in the sixth step is arranged outside the mixture F and freely permeates into the mixture F, and the air cooling in the ninth step is natural air cooling and fan air cooling.
Compared with the prior art, the invention has the beneficial effects that:
1. silica powder is added into a stirring kettle, a proper amount of anion water and silica powder adhesive are added for stirring to form a sticky state, and the antioxidant colloidal object formed by stirring is uniformly coated outside the magnesia carbon brick through a brush and the magnesia carbon brick is stood, so that the antioxidant colloidal object permeates into the magnesia carbon brick, the original magnesia carbon brick and the antioxidant object can be combined with each other, the magnesia carbon brick is heated and formed at high temperature through a furnace, the oxidation resistance of the magnesia carbon brick is improved when the magnesia carbon brick contacts molten steel and molten slag, and the service life of the magnesia carbon brick is prolonged;
2. the raw material fused magnesia particles and the binding agent are respectively preheated to 40 ℃ and 35 ℃, so that the normal mixing of the magnesia carbon brick is ensured before the manufacture, the fluidity of the binding agent before the manufacture is ensured, the raw material and the binding agent can be fully contacted and absorbed when being mutually stirred, the adhesiveness of the magnesia carbon brick during the manufacture can be improved by using the binding agent, the high temperature resistance and the hardness of the magnesia carbon brick during the baking and processing are improved by using a proper amount of carbon raw material and flake graphite, and the manufacture process is simple.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
a composite magnesia carbon brick resistant to high-oxygen slag scouring comprises an original magnesia carbon brick and an antioxidant part, wherein the original magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles, 10-25 parts of fused magnesia fine powder, 10-18 parts of carbon raw material, 10-20 parts of flaky graphite and 2-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 1-5 parts of silicon powder and anion water; 30-50 parts of silicon powder bonding agent and 3-7 parts of silicon powder bonding agent.
Specifically, in this embodiment, the original magnesia carbon brick comprises the following components in parts by weight: 65 parts of fused magnesia particles, 15 parts of fused magnesia fine powder, 10 parts of carbon raw materials, 10 parts of flake graphite and 2 parts of a bonding agent;
the antioxidant part comprises the following components in parts by weight: 2 parts of silicon powder, 30 parts of anion water and 3 parts of silicon powder bonding agent.
On the basis, the forming method of the composite magnesia carbon brick resistant to high-oxygen slag scouring specifically comprises the following processing steps:
the method comprises the following steps: preheating: preheating 70 parts of raw material fused magnesia particles to 40 ℃ to ensure normal mixing, heating 4 parts of a bonding agent to 35 ℃, increasing the fluidity of the bonding agent, controlling the preheating temperature in the preheating process, and avoiding overlong preheating time or overhigh temperature;
step two: mixing: mixing 70 parts of heated raw material fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw material and 18 parts of flaky graphite according to a proportion to obtain a mixed material A, adding the mixed material A into a stirrer to stir to obtain a processed material B, and specifically mixing to enable the content and the weight of each component to be measured by a measuring tool;
step three: stirring: adding the processing material B obtained in the step one into a stirrer, adding 50% of heated bonding agent, and stirring at the speed of 60 revolutions per minute by the stirrer for 5 minutes to obtain an unfinished product C;
step four: entering a mold: pouring the unfinished product C obtained in the step three into a mold, wherein the size of the mold can be selected according to the specific size, and pressing the unfinished product C poured into the mold to ensure that the unfinished product C is pressed and molded, so that the unfinished product C is completely filled into the mold to obtain a processed product D;
step five: antioxidant preparation: putting 4 parts of silicon powder into a stirring kettle, adding 50% of negative ion water and 6 parts of silicon powder binding agent, respectively pouring into the stirring kettle, stirring at the speed of 75 revolutions per minute by the stirring kettle for 10 minutes, and stirring into a thick state to obtain an antioxidant E;
step six: combining: slightly pouring the processed product C obtained in the fourth step out of the mold, taking out a proper amount of the antioxidant body E, and uniformly coating the antioxidant body E on the outer part of the processed product C through a brush to obtain a mixture F;
step seven: standing: placing the mixture F on a tray and standing for 15 minutes to enable the antioxidant body E to permeate into the processed product C, and avoiding dust from falling onto the mixture F during standing;
step eight: and (3) sintering: placing the mixture F coated with the antioxidant E on a tray, placing the tray in an oven, and roasting at 300 ℃ for 30min to obtain a finished product G, wherein the tray can be in different sizes according to actual conditions, or a large-scale mold can be used;
step nine: air cooling: and D, taking out the finished product G obtained in the step eight, placing the finished product G outside for air cooling, and taking the finished product G by using a clamp when the finished product G is taken out to avoid high-temperature burn.
Example 2:
a composite magnesia carbon brick resistant to high-oxygen slag scouring comprises an original magnesia carbon brick and an antioxidant part, wherein the original magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles, 10-25 parts of fused magnesia fine powder, 10-18 parts of carbon raw material, 10-20 parts of flaky graphite and 2-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 1-5 parts of silicon powder and anion water; 30-50 parts of silicon powder bonding agent and 3-7 parts of silicon powder bonding agent.
Specifically, in this embodiment, the original magnesia carbon brick comprises the following components in parts by weight: 70 parts of fused magnesia particles, 15 parts of fused magnesia fine powder, 15 parts of carbon raw materials, 15 parts of flake graphite and 3 parts of bonding agents;
the antioxidant part comprises the following components in parts by weight: 2 parts of silicon powder, 40 parts of anion water and 4 parts of silicon powder bonding agent.
On the basis, the forming method of the composite magnesia carbon brick resistant to high-oxygen slag scouring specifically comprises the following processing steps:
the method comprises the following steps: preheating: preheating 70 parts of raw material fused magnesia particles to 40 ℃ to ensure normal mixing, heating 4 parts of a bonding agent to 35 ℃, increasing the fluidity of the bonding agent, controlling the preheating temperature in the preheating process, and avoiding overlong preheating time or overhigh temperature;
step two: mixing: mixing 70 parts of heated raw material fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw material and 18 parts of flaky graphite according to a proportion to obtain a mixed material A, adding the mixed material A into a stirrer to stir to obtain a processed material B, and specifically mixing to enable the content and the weight of each component to be measured by a measuring tool;
step three: stirring: adding the processing material B obtained in the step one into a stirrer, adding 50% of heated bonding agent, and stirring at the speed of 65 revolutions per minute by the stirrer for 8 minutes to obtain an unfinished product C;
step four: entering a mold: pouring the unfinished product C obtained in the step three into a mold, wherein the size of the mold can be selected according to the specific size, and pressing the unfinished product C poured into the mold to ensure that the unfinished product C is pressed and molded, so that the unfinished product C is completely filled into the mold to obtain a processed product D;
step five: antioxidant preparation: putting 4 parts of silicon powder into a stirring kettle, adding 50% of negative ion water and 6 parts of silicon powder binding agent, respectively pouring into the stirring kettle, stirring at 78 rpm for 13 minutes by the stirring kettle, and stirring to be thick to obtain an antioxidant E;
step six: combining: slightly pouring the processed product C obtained in the fourth step out of the mold, taking out a proper amount of the antioxidant body E, and uniformly coating the antioxidant body E on the outer part of the processed product C through a brush to obtain a mixture F;
step seven: standing: placing the mixture F on a tray and standing for 18 minutes to enable the antioxidant body E to permeate into the processed product C, and avoiding dust from falling onto the mixture F during standing;
step eight: and (3) sintering: placing the mixture F coated with the antioxidant E on a tray, placing the tray in a furnace, and roasting at 350 ℃ for 30min to obtain a finished product G, wherein the tray can be in different sizes according to actual conditions or can be made by using a large-scale mold;
step nine: air cooling: and D, taking out the finished product G obtained in the step eight, placing the finished product G outside for air cooling, and taking the finished product G by using a clamp when the finished product G is taken out to avoid high-temperature burn.
Example 3:
a composite magnesia carbon brick resistant to high-oxygen slag scouring comprises an original magnesia carbon brick and an antioxidant part, wherein the original magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles, 10-25 parts of fused magnesia fine powder, 10-18 parts of carbon raw material, 10-20 parts of flaky graphite and 2-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 1-5 parts of silicon powder and anion water; 30-50 parts of silicon powder bonding agent and 3-7 parts of silicon powder bonding agent.
Specifically, in this embodiment, the original magnesia carbon brick comprises the following components in parts by weight: 72 parts of fused magnesia particles, 20 parts of fused magnesia fine powder, 15 parts of carbon raw materials, 18 parts of flaky graphite and 3 parts of bonding agents;
the antioxidant part comprises the following components in parts by weight: 3 parts of silicon powder, 40 parts of anion water and 5 parts of silicon powder bonding agent.
On the basis, the forming method of the composite magnesia carbon brick resistant to high-oxygen slag scouring specifically comprises the following processing steps:
the method comprises the following steps: preheating: preheating 70 parts of raw material fused magnesia particles to 40 ℃ to ensure normal mixing, heating 4 parts of a bonding agent to 35 ℃, increasing the fluidity of the bonding agent, controlling the preheating temperature in the preheating process, and avoiding overlong preheating time or overhigh temperature;
step two: mixing: mixing 70 parts of heated raw material fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw material and 18 parts of flaky graphite according to a proportion to obtain a mixed material A, adding the mixed material A into a stirrer to stir to obtain a processed material B, and specifically mixing to enable the content and the weight of each component to be measured by a measuring tool;
step three: stirring: adding the processing material B obtained in the step one into a stirrer, adding 50% of heated bonding agent, and stirring at the speed of 70 revolutions per minute by the stirrer for 10 minutes to obtain an unfinished product C;
step four: entering a mold: pouring the unfinished product C obtained in the step three into a mold, wherein the size of the mold can be selected according to the specific size, and pressing the unfinished product C poured into the mold to ensure that the unfinished product C is pressed and molded, so that the unfinished product C is completely filled into the mold to obtain a processed product D;
step five: antioxidant preparation: putting 4 parts of silicon powder into a stirring kettle, adding 50% of negative ion water and 6 parts of silicon powder binding agent, respectively pouring into the stirring kettle, stirring at the speed of 80 revolutions per minute by the stirring kettle for 15 minutes, and stirring into a thick state to obtain an antioxidant body E;
step six: combining: slightly pouring the processed product C obtained in the fourth step out of the mold, taking out a proper amount of the antioxidant body E, and uniformly coating the antioxidant body E on the outer part of the processed product C through a brush to obtain a mixture F;
step seven: standing: placing the mixture F on a tray and standing for 18 minutes to enable the antioxidant body E to permeate into the processed product C, and avoiding dust from falling onto the mixture F during standing;
step eight: and (3) sintering: placing the mixture F coated with the antioxidant E on a tray, placing the tray in a furnace, roasting at 400 ℃ for 30min to obtain a finished product G, wherein the tray can be in different sizes according to actual conditions or can be made of large molds;
step nine: air cooling: and D, taking out the finished product G obtained in the step eight, placing the finished product G outside for air cooling, and taking the finished product G by using a clamp when the finished product G is taken out to avoid high-temperature burn.
Example 4:
a composite magnesia carbon brick resistant to high-oxygen slag scouring comprises an original magnesia carbon brick and an antioxidant part, wherein the original magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles, 10-25 parts of fused magnesia fine powder, 10-18 parts of carbon raw material, 10-20 parts of flaky graphite and 2-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 1-5 parts of silicon powder and anion water; 30-50 parts of silicon powder bonding agent and 3-7 parts of silicon powder bonding agent.
Specifically, in this embodiment, the original magnesia carbon brick comprises the following components in parts by weight: 74 parts of fused magnesia particles, 22 parts of fused magnesia fine powder, 16 parts of carbon raw materials, 15 parts of flake graphite and 3 parts of bonding agents;
the antioxidant part comprises the following components in parts by weight: 3 parts of silicon powder, 45 parts of anion water and 5 parts of silicon powder bonding agent.
On the basis, the forming method of the composite magnesia carbon brick resistant to high-oxygen slag scouring specifically comprises the following processing steps:
the method comprises the following steps: preheating: preheating 70 parts of raw material fused magnesia particles to 40 ℃ to ensure normal mixing, heating 4 parts of a bonding agent to 35 ℃, increasing the fluidity of the bonding agent, controlling the preheating temperature in the preheating process, and avoiding overlong preheating time or overhigh temperature;
step two: mixing: mixing 70 parts of heated raw material fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw material and 18 parts of flaky graphite according to a proportion to obtain a mixed material A, adding the mixed material A into a stirrer to stir to obtain a processed material B, and specifically mixing to enable the content and the weight of each component to be measured by a measuring tool;
step three: stirring: adding the processing material B obtained in the step one into a stirrer, adding 50% of heated bonding agent, and stirring at the speed of 80 revolutions per minute by the stirrer for 10 minutes to obtain an unfinished product C;
step four: entering a mold: pouring the unfinished product C obtained in the step three into a mold, wherein the size of the mold can be selected according to the specific size, and pressing the unfinished product C poured into the mold to ensure that the unfinished product C is pressed and molded, so that the unfinished product C is completely filled into the mold to obtain a processed product D;
step five: antioxidant preparation: putting 4 parts of silicon powder into a stirring kettle, adding 50% of negative ion water and 6 parts of silicon powder binding agent, respectively pouring into the stirring kettle, stirring at the speed of 80 revolutions per minute by the stirring kettle for 15 minutes, and stirring into a thick state to obtain an antioxidant body E;
step six: combining: slightly pouring the processed product C obtained in the fourth step out of the mold, taking out a proper amount of the antioxidant body E, and uniformly coating the antioxidant body E on the outer part of the processed product C through a brush to obtain a mixture F;
step seven: standing: placing the mixture F on a tray and standing for 20 minutes to enable the antioxidant E to permeate into the processed product C, and avoiding dust from falling onto the mixture F during standing;
step eight: and (3) sintering: placing the mixture F coated with the antioxidant E on a tray, placing the tray in an oven, and roasting at 450 ℃ for 30min to obtain a finished product G, wherein the tray can be in different sizes according to actual conditions, or a large-scale mold can be used;
step nine: air cooling: and D, taking out the finished product G obtained in the step eight, placing the finished product G outside for air cooling, and taking the finished product G by using a clamp when the finished product G is taken out to avoid high-temperature burn.
Four kinds of magnesia carbon bricks can be obtained through the four groups of examples, and the oxidation resistance tests of the four kinds of magnesia carbon bricks are respectively carried out, so that the oxidation resistance test results of the magnesia carbon bricks in the four groups of examples are obtained, wherein the magnesia carbon brick in the example 4 has the best oxidation resistance and the highest hardness, and the parameters obtained in the test process are as follows:
| high temperature resistance | Shock resistance | Oxidation resistance | Hardness of | |
| Example 1 | 500℃ | 30％ | 45％ | 40％ |
| Example 2 | 1500℃ | 50％ | 58％ | 48％ |
| Example 3 | 1800℃ | 65％ | 70％ | 70％ |
| Example 4 | 2000％ | 65％ | 79％ | 82％ |
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The composite magnesia carbon brick resistant to high-oxygen slag scouring comprises an original magnesia carbon brick and an antioxidant part, and is characterized in that the original magnesia carbon brick comprises the following components in parts by weight: 65-75 parts of fused magnesia particles, 10-25 parts of fused magnesia fine powder, 10-18 parts of carbon raw material, 10-20 parts of flaky graphite and 2-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 1-5 parts of silicon powder, 30-50 parts of anion water and 3-7 parts of silicon powder bonding agent.
2. The composite magnesia carbon brick resistant to high-oxygen slag scouring of claim 1, wherein the original magnesia carbon brick comprises the following components in parts by weight: 70-75 parts of fused magnesia particles, 15-20 parts of fused magnesia fine powder, 15-18 parts of carbon raw material, 15-20 parts of flaky graphite and 3-4 parts of bonding agent;
the antioxidant part comprises the following components in parts by weight: 2-5 parts of silicon powder and anion water; 40-50 parts of silicon powder bonding agent and 4-7 parts of silicon powder bonding agent.
3. The composite magnesia carbon brick resistant to high oxygen slag scouring of claim 1, wherein: the original magnesia carbon brick comprises the following components in parts by weight: 70 parts of fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw materials, 18 parts of flake graphite and 4 parts of bonding agents;
the antioxidant part comprises the following components in parts by weight: 4 parts of silicon powder and anion water; 45 parts of silicon powder bonding agent and 6 parts of silicon powder bonding agent.
4. The method for forming the composite magnesia carbon brick resistant to the scouring of the high-oxygen slag according to any one of claims 1 to 3, wherein: the specific processing steps are as follows:
the method comprises the following steps: preheating: preheating 70 parts of raw material fused magnesia particles to 40 ℃ to ensure normal mixing, heating 4 parts of a bonding agent to 35 ℃, and increasing the fluidity of the bonding agent;
step two: mixing: mixing 70 parts of heated raw material fused magnesia particles, 20 parts of fused magnesia fine powder, 16 parts of carbon raw material and 18 parts of flaky graphite according to a proportion to obtain a mixed material A, and adding the mixed material A into a stirrer to stir to obtain a processed material B;
step three: stirring: adding the processing material B obtained in the step one into a stirrer, adding 50% of heated bonding agent, and stirring at the speed of 60-85 rpm for 5-10 minutes by the stirrer to obtain an unfinished product C;
step four: entering a mold: pouring the unfinished product C obtained in the step three into a mold, wherein the size of the mold can be selected according to the specific size, and pressing the unfinished product C poured into the mold to ensure that the unfinished product C is pressed and molded, so that the unfinished product C is completely filled into the mold to obtain a processed product D;
step five: antioxidant preparation: putting 4 parts of silicon powder into a stirring kettle, adding 50% of anion water and 6 parts of silicon powder binding agent, respectively pouring into the stirring kettle, stirring at the speed of 75-80 rpm by the stirring kettle for 10-15 minutes, and stirring to be thick to obtain an antioxidant E;
step six: combining: slightly pouring the processed product C obtained in the fourth step out of the mold, taking out a proper amount of the antioxidant body E, and uniformly coating the antioxidant body E on the outer part of the processed product C through a brush to obtain a mixture F;
step seven: standing: placing the mixture F on a tray and standing for 15-20 minutes to enable the antioxidant E to permeate into the processed product C, and avoiding dust falling onto the mixture F during standing;
step eight: and (3) sintering: placing the mixture F coated with the antioxidant E on a tray, and roasting the tray in a furnace at 300-500 ℃ for 30min to obtain a finished product G;
step nine: air cooling: and D, taking out the finished product G obtained in the step eight, placing the finished product G outside for air cooling, and taking the finished product G by using a clamp when the finished product G is taken out to avoid high-temperature burn.
5. The composite magnesia carbon brick resistant to high oxygen slag scouring of claim 1, wherein: the binding agent is one of phenolic resin or asphalt.
6. The composite magnesia carbon brick resistant to high oxygen slag scouring of claim 1, wherein: and the stirring speed of the stirrer in the third step is 75 revolutions per minute, and the stirring time is 8 minutes.
7. The composite magnesia carbon brick resistant to high oxygen slag scouring of claim 1, wherein: and in the fifth step, the stirring speed of the stirring kettle is 75 revolutions per minute, and the stirring time is 12 minutes.
8. The composite magnesia carbon brick resistant to high oxygen slag scouring of claim 1, wherein: the standing time of the mixture F in the step seven is 20 minutes, and the roasting temperature in the step eight is 400 ℃.
9. The composite magnesia carbon brick resistant to high oxygen slag scouring of claim 1, wherein: and the antioxidant E is arranged outside the mixture F and freely permeates into the mixture F in the sixth step, and the air cooling mode in the ninth step is natural air cooling and fan air cooling.
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| CN117466626A (en) * | 2023-12-27 | 2024-01-30 | 中民驰远实业有限公司 | Method for preparing magnesium-based composite refractory bricks by recycling waste magnesia carbon bricks |
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