CN109020572A - A kind of magnesia carbon brick with modified bonding agent preparation - Google Patents
A kind of magnesia carbon brick with modified bonding agent preparation Download PDFInfo
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- CN109020572A CN109020572A CN201810982581.1A CN201810982581A CN109020572A CN 109020572 A CN109020572 A CN 109020572A CN 201810982581 A CN201810982581 A CN 201810982581A CN 109020572 A CN109020572 A CN 109020572A
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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
- 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
-
- 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
-
- 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
- C04B2235/3826—Silicon carbides
-
- 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
- C04B2235/402—Aluminium
-
- 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
- C04B2235/02—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
- C04B2235/428—Silicon
Abstract
The present invention relates to a kind of magnesia carbon brick with modified bonding agent preparation, the raw materials including following parts by weight: bonding agent 3-6 parts modified；10-40 parts of fused magnesite of 3mm≤granularity < 5mm；5-30 parts of fused magnesite of 1mm≤granularity < 3mm；Granularity is less than 10-20 parts of fused magnesite of 1mm；10-20 parts of magnesia powder；12-16 parts of flaky graphite；0-4 parts of additive, 0 part is not included.Advantage is: the present invention uses in certain steel mill 100t ladle slag line area; average access times are up to 75 furnaces; it is much higher by 50 times of previous access times average when the use of phenolic resin being bonding agent, for energy-saving, environmental protection, increases economic benefit and have great importance.
Description
Technical field
The present invention relates to a kind of magnesia carbon bricks with modified bonding agent preparation.
Background technique
Magnesia carbon brick is the property using fused magnesite, crystalline flake graphite and bonding agent as basic refractory made from primary raw material
Bonding agent used can be depended greatly on.Magnesia carbon brick is to bonding agent requirement: 1) having preferably to magnesia and graphite
Wetability；2) caking property is good, and room temperature, which forms green body, will some strength；3) carbonation rate is high, being capable of acid-alkali-corrosive-resisting；4) after burning
Bond strength is high；5) setting rate is controllable under room temperature；6) harmful substance is free of, operating environment is improved.
Phenolic resin is wide due to having many advantages, such as that thermohardening, dry tenacity are big, elevated temperature strength is higher and low in the pollution of the environment
The general preparation applied to magnesia carbon brick, combination principle are mainly to pass through disconnected crosslink of itself chain in solidification process to react formation
Network structure, to improve the mechanical interlocked power between bonding agent and material.But since phenolic resin self structure is relatively simple, Gu
The network structure formed after change is not fine and close enough, so that there is low temperature intensity deficiency with the magnesia carbon brick that phenolic resin combines.
Meanwhile the phenol of one of phenolic resin starting material derives from petrochemicals, with the continuous improvement of crude oil price, the valence of phenol
Lattice are also higher and higher, cause the cost of phenolic resin growing, thus in the production cost for improving magnesia carbon brick to a certain degree.
Summary of the invention
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a kind of use to be modified magnesia carbon brick prepared by bonding agent,
Meet magnesia carbon brick preparation to require, have preferable wetability to magnesia and graphite, caking property is good, and room temperature, which forms green body, will have centainly
Intensity, carbonation rate are high, can acid-alkali-corrosive-resisting, bond strength is high after burning.
To achieve the above object, the invention is realized by the following technical scheme:
A kind of magnesia carbon brick with modified bonding agent preparation, the raw material including following parts by weight:
It is bonding agent 3-6 parts modified；10-40 parts of fused magnesite of 3mm≤granularity < 5mm；1mm≤granularity < 3mm electric smelting
5-30 parts of magnesia；Granularity is less than 10-20 parts of fused magnesite of 1mm；10-20 parts of magnesia powder；12-16 parts of flaky graphite；Add
Add 0-4 parts of agent, does not include 0 part.
The physical and chemical index of the fused magnesite, fused magnesite fine powder: MgO >=97.5, CaO≤1.4, SiO2≤ 0.6,
Fe2O3≤ 0.8, bulk density >=3.45g/cm3；
The granularity of flaky graphite is less than 0.088mm, wherein carbon containing mass percent are as follows: C >=95.0%.
The additive is silicon powder, aluminium powder, silicon powder-aluminium powder composite powder, asphalt powder, silicon carbide, boron carbide, magnesium alloy
One or more kinds of mixtures of powder, grade≤320 mesh.
The modification bonding agent includes the raw material of following parts by weight: 1 part of calcium lignosulfonate, 1-3 parts of phenolic resin.
The modification bonding agent room temperature be liquid, 25 DEG C of 10000-14000mpa.s of viscosity and with temperature increase viscosity
Reduce, the degree of polymerization be 5-8, molecular mass 10000-20000, solidification temperature be 200 DEG C, 85 or more solid content, carbon residue 46 with
On.
Calcium lignosulfonate, phenolic resin, catalyst are mixed, urge by the preparation method of the modification bonding agent
Agent additional amount is 1%-1.5%, reaction time 2-3h by weight percentage；Catalyst is NaOH.
A kind of preparation method of the magnesia carbon brick with modified bonding agent preparation, comprising the following steps:
) ingredient: by additive and fused magnesite fine powder in vibromill it is dry-mixed uniformly, it is spare to be made total milling, by each grain
Degree fused magnesite, modified bonding agent, additive weigh up spare according to the ratio；
2) it is kneaded: 3mm≤granularity < 5mm, 1mm≤granularity < 3mm is preheated to 30-40 DEG C of fused magnesite and room temperature
Modified bonding agent is mixed, and 3-5min is stirred, and modified bonding agent is made uniformly to be wrapped in fused magnesite particle surface, then plus scale
1-2min is mixed in shape graphite, is eventually adding fused magnesite fine powder and the mixed at high speed 8-12min that is milled altogether, then mixed on low speed
It discharges after 10-15min；
3) form: material is taken off in quadrangle, material is pressed in quadrangle, high-pressure molding, and heavy after first light, the mode of air-discharging is suppressed；
4) it is heat-treated: being heat-treated with tunnel oven, from room temperature to 110 DEG C of heating 8h, 200 DEG C are heated to from 110 DEG C and is added
Hot 8h, 200 DEG C of heat preservation 6h, kiln discharge sort, to complete the preparation to magnesia carbon brick；
The main physical and chemical index of prepared magnesia carbon brick is as follows:
MgO >=86.7%, bulk density >=3.14g/cm after 200 DEG C of bakings3, 200 DEG C × apparent porosity≤3%, 200 for 24 hours
DEG C × compressive resistance >=40MPa for 24 hours, 1600 DEG C × 3h Linear change rate 0~1.0%, carbon content is between 14%-16%.
Compared with prior art, the beneficial effects of the present invention are:
The present invention uses in certain steel mill 100t ladle slag line area, and average access times are much higher by previous use up to 75 furnaces
50 times of average access times when phenolic resin is bonding agent for energy-saving, environmental protection, increase economic benefit with weight
The meaning wanted.
Modified bonding agent substitutes phenol synthesis phenol-formaldehyde resin modified with partial lignin, and lignin segment therein can be sent out
Life is cross-linked to form network structure, and the segment of phenolic resin can also form network structure, so that modified resin solidification
After form inierpeneirating network structure, improve its crosslink density, improve to a certain extent mechanical interlocked between bonding agent and material
Power, to achieve the effect that further increase bond strength.Modified bonding agent uses calcium lignosulfonate for feedstock portions substitution
Phenol, using sodium hydroxide as catalyst, synthesis modification bonding agent, and be applied in magnesia carbon brick as bonding agent, for section
It can lower consumption, increase economic benefit has great importance.
Specific embodiment
The present invention is described in detail below, it should be noted that implementation of the invention embodiment party not limited to the following
Formula.
When preparing magnesia carbon brick, using the raw material of following parts by weight:
It is bonding agent 3-6 parts modified；10-40 parts of fused magnesite of 3mm≤granularity < 5mm；1mm≤granularity < 3mm electric smelting
5-30 parts of magnesia；Granularity is less than 10-20 parts of fused magnesite of 1mm；10-20 parts of magnesia powder；12-16 parts of flaky graphite；Add
Add 0-4 parts of agent, do not include 0 part, by being kneaded, prepared by molding, the processes such as heat treatment, is applied.
Wherein, the physical and chemical index of fused magnesite and fused magnesite fine powder: MgO >=97.5, CaO≤1.4, SiO2≤ 0.6,
Fe2O3≤ 0.8, bulk density >=3.45g/cm3.The granularity of flaky graphite is less than 0.088mm, wherein carbon containing mass percent
Are as follows: C >=95.0%.
Additive be silicon powder, aluminium powder, silicon powder-aluminium powder composite powder, asphalt powder, silicon carbide, boron carbide, magnesium aluminum-alloy powder one
Kind or more than one mixture, grade≤320 mesh.
Magnesia carbon brick embodiment:
Magnesia carbon brick preparation method, comprising the following steps:
1) ingredient: additive and fused magnesite fine powder (less than 1 part) is dry-mixed uniform in vibromill, it is standby that total milling is made
With each granularity fused magnesite, modified bonding agent, additive being weighed up according to the ratio spare；
2) it is kneaded: 3mm≤granularity < 5mm, 1mm≤granularity < 3mm is preheated to 30-40 DEG C of fused magnesite and room temperature
The modification bonding agent of (25 DEG C or so, it is not possible to more than 50 DEG C) is mixed, and 3-5min is stirred, and wraps up modified bonding agent uniformly
In fused magnesite particle surface, then plus flaky graphite be mixed 1-2min, be eventually adding fused magnesite fine powder and total milling
It discharges after mixed at high speed 8-12min, then mixed on low speed 10-15min；
3) form: material is taken off in quadrangle, material is pressed in quadrangle, high-pressure molding, and heavy after first light, the mode of air-discharging is suppressed；
4) it is heat-treated: being heat-treated with tunnel oven, from room temperature to 110 DEG C of heating 8h, 200 DEG C are heated to from 110 DEG C and is added
Hot 8h, 200 DEG C of heat preservation 6h, kiln discharge sort, to complete the preparation to magnesia carbon brick；
The main physical and chemical index of prepared magnesia carbon brick is as follows:
MgO >=86.7%, bulk density >=3.14g/cm after 200 DEG C of bakings3, 200 DEG C × apparent porosity≤3%, 200 for 24 hours
DEG C × compressive resistance >=40MPa for 24 hours, 1600 DEG C × 3h Linear change rate 0~1.0%, carbon content is between 14%-16%.
Modification bonding agent employed in above-described embodiment are as follows:
Modified bonding agent includes the raw material of following parts by weight: 1 part of calcium lignosulfonate, 1-3 parts of phenolic resin；It will be wooden
Plain sulfoacid calcium, phenolic resin, catalyst are mixed, and catalyst charge is 1%-1.5%, reaction time by weight percentage
For 2-3h；Catalyst is N aOH.
Modified bonding agent room temperature is liquid, 25 DEG C of 10000-14000mpa.s of viscosity and increases viscosity with temperature and reduces, and is gathered
Right is 5-8, molecular mass 10000-20000, and solidification temperature is 200 DEG C, 85 or more solid content, 46 or more carbon residue.
Lignin is a kind of aromatic polymer compound, is mainly derived from spent pulping liquor, low in cost, and its molecule knot
Contain a large amount of phenolic hydroxyl group and aldehyde functions in structure, the presence of these functional groups, which can partially substitute phenol and prepare lignin, to be changed
Property phenolic resin.In the curing process, lignin segment therein can crosslink to form network structure, and phenolic resin
Segment can also form network structure so that forming inierpeneirating network structure after modified resin solidification, it is close to improve its crosslinking
Degree improves the mechanical interlocked power between bonding agent and material to a certain extent, further increases bond strength to reach
Effect.
The present invention is using modified resin as bonding agent, using fused magnesite and flaky graphite as primary raw material, silicon powder, aluminium powder,
The mixtures of the one or more of silicon powder-aluminium powder composite powder, asphalt powder, silicon carbide, boron carbide, magnesium aluminum-alloy powder are addition
Agent, by being kneaded, molding, the preparation methods such as heat treatment.A kind of new modified bonding agent combination magnesia carbon brick is prepared, in certain steel mill
The use of 100t ladle slag line area, average access times are much higher by up to 75 furnaces and use phenolic resin in the past to be averaged when bonding agent
50 times of access times have great importance for energy-saving, environmental protection, increase economic benefit.
Claims (7)
1. a kind of magnesia carbon brick with modified bonding agent preparation, which is characterized in that the raw material including following parts by weight:
It is bonding agent 3-6 parts modified；10-40 parts of fused magnesite of 3mm≤granularity < 5mm；1mm≤granularity < 3mm fused magnesite
5-30 parts；Granularity is less than 10-20 parts of fused magnesite of 1mm；10-20 parts of magnesia powder；12-16 parts of flaky graphite；Additive
0-4 parts, 0 part is not included.
2. a kind of magnesia carbon brick with modified bonding agent preparation according to claim 1, which is characterized in that the electric-melting magnesium
The physical and chemical index of sand, fused magnesite fine powder: MgO >=97.5, CaO≤1.4, SiO2≤ 0.6, Fe2O3≤ 0.8, bulk density >=
3.45g/cm3；
The granularity of flaky graphite is less than 0.088mm, wherein carbon containing mass percent are as follows: C >=95.0%.
3. a kind of magnesia carbon brick with modified bonding agent preparation described in claim 1, which is characterized in that the additive is silicon
One or more kinds of mixing of powder, aluminium powder, silicon powder-aluminium powder composite powder, asphalt powder, silicon carbide, boron carbide, magnesium aluminum-alloy powder
Object, grade≤320 mesh.
4. a kind of magnesia carbon brick with modified bonding agent preparation described in claim 1, which is characterized in that the modification bonding agent
Raw material including following parts by weight: 1 part of calcium lignosulfonate, 1-3 parts of phenolic resin.
5. a kind of magnesia carbon brick with modified bonding agent preparation according to claim 1, which is characterized in that the modified knot
Mixture room temperature be liquid, 25 DEG C of 10000-14000mpa.s of viscosity and with temperature increase viscosity reduce, the degree of polymerization be 5-8, point
Protonatomic mass 10000-20000, solidification temperature are 200 DEG C, 85 or more solid content, 46 or more carbon residue.
6. a kind of magnesia carbon brick with modified bonding agent preparation according to claim 4, which is characterized in that the modified knot
The preparation method of mixture calcium lignosulfonate, phenolic resin, catalyst is mixed, catalyst charge percentage by weight
Than for 1%-1.5%, reaction time 2-3h；Catalyst is NaOH.
7. a kind of preparation method of the magnesia carbon brick with modified bonding agent preparation described in -6 any one according to claim 1,
It is characterized in that, comprising the following steps:
1) ingredient: by additive and fused magnesite fine powder in vibromill it is dry-mixed uniformly, it is spare to be made total milling, by each granularity electricity
Fused magnesia, modified bonding agent, additive weigh up spare according to the ratio；
2) it is kneaded: 3mm≤granularity < 5mm, 1mm≤granularity < 3mm is preheated to the modification of 30-40 DEG C of fused magnesite and room temperature
Bonding agent is mixed, and 3-5min is stirred, and modified bonding agent is made uniformly to be wrapped in fused magnesite particle surface, then plus flakey stone
1-2min is mixed in ink, is eventually adding fused magnesite fine powder and the mixed at high speed 8-12min that is milled altogether, then mixed on low speed 10-
It discharges after 15min；
3) form: material is taken off in quadrangle, material is pressed in quadrangle, high-pressure molding, and heavy after first light, the mode of air-discharging is suppressed；
4) it is heat-treated: being heat-treated with tunnel oven, from room temperature to 110 DEG C of heating 8h, 200 DEG C of heating 8h are heated to from 110 DEG C,
200 DEG C of heat preservation 6h, kiln discharge sort, to complete the preparation to magnesia carbon brick；
The main physical and chemical index of prepared magnesia carbon brick is as follows:
MgO >=86.7%, bulk density >=3.14g/cm after 200 DEG C of bakings3, 200 DEG C × for 24 hours apparent porosity≤3%, 200 DEG C ×
Compressive resistance >=40MPa for 24 hours, 1600 DEG C × 3h Linear change rate 0~1.0%, carbon content is between 14%-16%.
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| CN201810982581.1A CN109020572A (en) | 2018-08-27 | 2018-08-27 | A kind of magnesia carbon brick with modified bonding agent preparation |
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| CN201810982581.1A CN109020572A (en) | 2018-08-27 | 2018-08-27 | A kind of magnesia carbon brick with modified bonding agent preparation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851373A (en) * | 2018-12-29 | 2019-06-07 | 海城利尔麦格西塔材料有限公司 | A kind of modified phenolic resin magnesia carbon brick and preparation method thereof |
| CN110436892A (en) * | 2019-08-20 | 2019-11-12 | 郑州汇丰炉料有限公司 | A kind of dedicated magnesia carbon brick of bottom of steel ladle and preparation method thereof |
| CN110451932A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of Ladle slag line magnesia carbon brick |
| CN112500134A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Magnesia carbon brick and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109851373A (en) * | 2018-12-29 | 2019-06-07 | 海城利尔麦格西塔材料有限公司 | A kind of modified phenolic resin magnesia carbon brick and preparation method thereof |
| CN110436892A (en) * | 2019-08-20 | 2019-11-12 | 郑州汇丰炉料有限公司 | A kind of dedicated magnesia carbon brick of bottom of steel ladle and preparation method thereof |
| CN110451932A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of Ladle slag line magnesia carbon brick |
| CN112500134A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Magnesia carbon brick and preparation method thereof |
| CN112500134B (en) * | 2021-02-05 | 2021-06-08 | 北京利尔高温材料股份有限公司 | Magnesia carbon brick and preparation method thereof |
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Application publication date: 20181218 |
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