CN105218116B - A kind of chromium-free brick and preparation method thereof - Google Patents
A kind of chromium-free brick and preparation method thereof Download PDFInfo
- Publication number
- CN105218116B CN105218116B CN201510670471.8A CN201510670471A CN105218116B CN 105218116 B CN105218116 B CN 105218116B CN 201510670471 A CN201510670471 A CN 201510670471A CN 105218116 B CN105218116 B CN 105218116B
- Authority
- CN
- China
- Prior art keywords
- chromium
- free brick
- parts
- powder
- brick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to refractory material and preparation method thereof, and in particular to a kind of chromium-free brick and preparation method thereof.A kind of chromium-free brick of the present invention, is prepared from by following parts by weight of component：15～18 parts of fused magnesite coarse granule；20～25 parts of fused magnesite fine grained；20～25 parts of fused magnesite fine powder；2～5 parts of light-magnesite powder；3～6 parts of alpha-aluminium oxide micro mist；5～10 parts of metallic aluminium；10～15 parts of electric smelting aluminium riched spinel powder；10～15 parts of AZS；3～5 parts of liquid phenolic resin.Chromium-free brick prepared by the present invention, not only production method is simple, also invades with anti-slag, the features such as elevated temperature strength is big, consistency is higher, and raw material does not contain chromium, environmentally friendly, and its comprehensive performance is better than magnesite-chrome brick.
Description
Technical field
The present invention relates to refractory material and preparation method thereof, and in particular to a kind of chromium-free brick and preparation method thereof.
Background technology
Nineteen fifty-seven Thyssen iron company invention vacuum circulation degassing-RH methods, subsequent the seventies and 80 years
In generation, Japan, successively develop RH-OB methods, RH-KTB methods and RH-PB methods, the refining function of constantly improve RH.With market pair
The purity requirements more and more higher of steel, while the increase to high-quality steel demand, it is smart that domestic and international majority steel mill is configured with RH
Refining device.RH liners generally adopt magnesite-chrome brick, but Cr (III) generates Cr with CaO reactions in slag in high temperature oxidative atmosphere
(VI), environmental pollution is caused.With environmental requirement more and more tighter, it is necessary to develop chromium-free brick substitute magnesite-chrome brick, eliminate pollution of chromium, push away
Dynamic green Iron ＆ Steel Development.
Application No. " CN201310552471.9 ", entitled " a kind of RH vacuum drying ovens inner lining refractory and its system
Preparation Method and RH vacuum drying ovens ", discloses a kind of RH vacuum drying ovens inner lining refractory and preparation method thereof and RH vacuum drying ovens.The liner
Refractory material by fused magnesite, the Delanium for processing, antioxidant, phenolic resin ratio dispensing by weight, through mixed grind,
Pressure forming, Technology for Heating Processing obtain RH vacuum drying oven inner lining refractories.The patent is related to a kind of low carbon magnesia carbon brick, there is carburetting
Risk.
Application No. " CN201110091063.9 ", entitled " a kind of with high corrosion resistance, high-heat resistance shock resistant
RH stoves magnesium zirconia block and its production technology ", disclose a kind of with high corrosion resistance, the RH stove magnesium zirconia blocks of high-heat resistance shock resistant and
Its production technology, the brick mass percent be MgO 76-90%, ZrO2 5-21%, 1680-1840 DEG C of firing temperature.Technique
For：Magnesia and the preprocessed synthesis magnesium zircon sand of zirconium oxide；Synthesis magnesium zircon sand, fused magnesite are broken into 5-3mm, 3-1mm, 1-0mm
Particle；In proportion by particulate material, the magnesia of 150-200 mesh and magnesium zircon sand powder, 200-250 mesh zirconium oxide powders, additive
CaO and Y2O3, the strength homogenizing mixing of binding agent spent pulping liquor are compressing；120 DEG C of baking 24-72h；Heat up in 1680-1840
At DEG C, insulation 3-5h burns till.In the patent, sintering temperature is 1680-1840 DEG C, high energy consumption.
Application No. " CN201110234230.0 ", entitled " RH refining inner lining of furnace bricks and preparation method thereof ",
Disclose a kind of key component and percentage by weight is：Granularity is 0.1～5 millimeter of magnesia aggregate：55～70%, granularity ＜
0.1 millimeter of matrix：30～45%, the additional sol binder for accounting for above-mentioned raw materials total weight percent 2～5%；Preparation process：
The magnesia aggregate that granularity is 0.1～5 millimeter is mixed with sol binder；Add the matrix of 0.1 millimeter of granularity ＜ and mix；Into
Type；Baking；Fire；Insulation；Room temperature is naturally cooled to, is then come out of the stove stand-by.A kind of MgO-ZrO of the patented invention2- CaO bricks,
It is favorably improved anti-slag to invade and permeate, but there is CaO aquations.
Application No. " CN201310475475.1 ", entitled " a kind of magnesia-spinel brick and preparation method thereof " is public
Opened a kind of magnesia-spinel brick, by the magnesia of 60～80 weight portions, the dicalcium sand of 10～20 weight portions, 10～20 weight portions pre-
Batch mixing is formed with the resin of 2～5 weight portions；The premix includes：Magnesium-rich spinel, activated alumina and metallic silicon power；Institute
Stating magnesia includes the different magnesia of two or more particle diameter.The patent introduces metallic silicon power, develops a kind of containing metal powder
The magnesia-spinel brick at end, improves consistency using post forming.
Application No. " CN201110124748.9 ", entitled " a kind of non-burning aluminum magnesia spinel brick ", discloses one
Non-burning aluminum magnesia spinel brick is planted, the percent mass proportioning of its each component is：Corundum 50～80%, aluminum-spinel 5～30%, magnesium
Emery dust 2～5%, alumina powder 3～10%, at least one in balance of simple substance silica flour, metallic aluminium powder, boron carbide powder are described
The each component of non-burning aluminum magnesia spinel brick is combined by an additional bonding agent.The patent be related to a kind of silicon metal powder, aluminium powder,
The aluminum-spinel unburned brick of B4C.
Application No. " CN201110392586.7 ", entitled " it is brilliant that refining furnace furnace lining Ultramicro-powder combines impervious point
Stone brick and preparation method ", it is good to disclose excellent a kind of Chrome-free, high-temperature behavior, thermal shock resistance and wearability, and slag-resistant infiltration is molten
Erosion excellent performance, the refining furnace of long service life combine impervious spinel brick and preparation method with Ultramicro-powder.Main idiosome material used
Expect for electric smelting aluminium riched spinel 62-66 parts, spinelle 19-23 parts of pre-synthesis, alumina powder 13-17 parts；Additional bonding agent
The ratio of the addition gross weight that accounts for main idiosome material respectively be：Bonding agent 3-5%；High-pressure molding, high-temperature activation sintering and
Into.The patent utilization superfine powder is combined, and high temperature burns till spinelle-Al2O3 bricks, relatively costly.
Application No. " CN201110289991.6 ", entitled " magnesium is not burnt in refining furnace furnace lining metal composite antiseepage
Spinel brick and preparation method thereof ", discloses that a kind of Chrome-free, high-temperature behavior are excellent, the porosity is low, corrosion resistance is strong, thermal shock is steady
Qualitative and wearability is good, and magnesia-spinel brick is not burnt in the excellent refining furnace furnace lining metal composite antiseepage of slag-resistant permeance property.This
The main blank of material of invention is a kind of or several by magnesite clinker (content of MgO >=94%) and fused magnesite (content of MgO >=94%)
Kind, add pre-synthesis spinelle (electric smelting and sintering spinelle one or more, Al2O3Content 60-90%), 1-6 kind metals
Thing one or more as additive, organic matter is used as bonding agent.The patent introduces metal Ti, Si, Zn etc., and formation is impermeable not
Burn magnesia-spinel brick.
Comprehensive above patent understands that additive is added in powder mode mostly in prior art, is contacted not enough with bulky grain
Fully, so as to sintering process is difficult to form high strength bond between the two.
Content of the invention
In order to solve the above problems, first technical problem to be solved by this invention is to provide a kind of intensity, consistency
The higher chromium-free brick of performance is invaded with anti-slag.
A kind of chromium-free brick of the present invention, is prepared from by following parts by weight of component：
Wherein, 5mm≤fused magnesite coarse granule particle diameter≤8mm, 3mm≤fused magnesite fine grained particle diameter ＜ 5mm, 1mm≤
Fused magnesite fine powder particle diameter ＜ 3mm.
Further, as preferred technical scheme, a kind of chromium-free brick described above is prepared by following parts by weight of component
Form：
A kind of chromium-free brick described above, MgO ＞ 97wt% wherein in fused magnesite, CaO ＜ 1wt%, SiO2＜ 1wt%；
Light-magnesite powder particle diameter ＜ 0.074mm, and wherein MgO >=80wt%, CaO≤2wt%, SiO2≤ 2wt%；Metallic aluminium purity
＞ 98%；Electric smelting aluminium riched spinel powder footpath ＜ 0.074mm；0.074mm≤AZS≤1mm.
Second technical problem to be solved by this invention is to provide a kind of method for preparing above-mentioned chromium-free brick.
The method for preparing chromium-free brick described above, comprises the following steps：
A, by fused magnesite coarse granule, fused magnesite fine grained and fused magnesite fine powder mix, be preheated to more than 550 DEG C,
Obtain magnesia compound；
B, metallic aluminium is melted at 700～720 DEG C after, be added in magnesia compound, mix, until whole magnesia
Grain surface is applied till being covered with sheet metal aluminium；
C, AZS, electric smelting aluminium riched spinel powder, Alpha-alumina micro mist and light-magnesite powder is sequentially added, mixed
Even 40～60min, adds liquid phenolic resin, then mixed 35～45min, obtains chromium-free brick compound；
D, the chromium-free brick compound for obtaining step c are pressed into chromium-free brick adobe under 800MPa pressure, through 100～120
After DEG C 20～36h of drying, 10～15h are heat-treated at 200～300 DEG C, obtain final product chromium-free brick.
Further, the described above method for preparing chromium-free brick, in order to reduce workload, saves time and cost, while
So that mixed material mixes evenly, mix in a steps
10min.
The described above method for preparing chromium-free brick, in Step d, Chrome-free brick adobe preferably dries 24h through 110 DEG C.
The present invention passes through selectively to apply layer of metal or metal alloy, shape after high-temperature oxydation in fused magnesite particle surface
Into reaction in-situ, promote the sintering between particle and matrix, reach the purpose for improving intensity and consistency, at the same time introduce and contain zirconium
Raw material improves anti-slag and invades performance.Compared to existing technology, not only production method is simple for the RH liners that prepared by present invention chromium-free brick, also
Invade with anti-slag, the features such as elevated temperature strength is big, consistency is higher because raw material does not contain chromium, environmentally friendly, will not be to environment
Damage with people and animals, its comprehensive performance is better than magnesite-chrome brick.
Specific embodiment
A kind of chromium-free brick of the present invention, is prepared from by following parts by weight of component：
Wherein, 5mm≤fused magnesite coarse granule particle diameter≤8mm, 3mm≤fused magnesite fine grained particle diameter ＜ 5mm, 1mm≤
Fused magnesite fine powder particle diameter ＜ 3mm.
Further, as preferred technical scheme, a kind of chromium-free brick described above is prepared by following parts by weight of component
Form：
A kind of chromium-free brick described above, MgO ＞ 97wt% wherein in fused magnesite, CaO ＜ 1wt%, SiO2＜ 1wt%；
Light-magnesite powder particle diameter ＜ 0.074mm, and wherein MgO >=80wt%, CaO≤2wt%, SiO2≤ 2wt%；Metallic aluminium purity
＞ 98%；Electric smelting aluminium riched spinel powder footpath ＜ 0.074mm；0.074mm≤AZS≤1mm.
The method for preparing chromium-free brick described above, comprises the following steps：
A, by fused magnesite coarse granule, fused magnesite fine grained and fused magnesite fine powder mix, be preheated to more than 550 DEG C,
Obtain magnesia compound；
B, metallic aluminium is melted at 700～720 DEG C after, be added in magnesia compound, mix, until whole magnesia
Grain surface is applied till being covered with sheet metal aluminium；
C, AZS, electric smelting aluminium riched spinel powder, Alpha-alumina micro mist and light-magnesite powder is sequentially added, mixed
Even 40～60min, adds liquid phenolic resin, then mixed 35～45min, obtains chromium-free brick compound；
D, the chromium-free brick compound for obtaining step c are pressed into chromium-free brick adobe under 800MPa pressure, through 100～120
After DEG C 20～36h of drying, 10～15h are heat-treated at 200～300 DEG C, obtain final product chromium-free brick.
Further, the described above method for preparing chromium-free brick, in order to reduce workload, saves time and cost, while
So that mixed material mixes evenly, mix in a steps
10min.
The described above method for preparing chromium-free brick, in Step d, Chrome-free brick adobe preferably dries 24h through 110 DEG C.
The specific embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit
System is among described scope of embodiments.
Embodiment 1
Chromium-free brick of the present invention is prepared, is comprised the following steps：
A, by 15 weight portion of fused magnesite coarse granule, 20 weight of 25 weight portion of fused magnesite fine grained and fused magnesite fine powder
Part mixes, and is preheated to more than 550 DEG C, obtains magnesia compound；
B, 10 weight portion of metallic aluminium of purity ＞ 98% is melted at 700～720 DEG C after, be added to magnesia compound
In, mix, till whole magnesia particle surfaces apply and are covered with sheet metal aluminium；
C, sequentially add 15 weight portion of AZS, 15 weight portion of electric smelting aluminium riched spinel powder, 6 weight of Alpha-alumina micro mist
Amount 5 weight portion of part and light-magnesite powder, mixes 40～60min, adds 5 weight portion of liquid phenolic resin, then mix
40min, obtains chromium-free brick compound；
D, the chromium-free brick compound for obtaining step c are pressed into chromium-free brick adobe under 800MPa pressure, through 110 DEG C of dryings
After 24h, 10～15h is heat-treated at 200～300 DEG C, obtains final product chromium-free brick.
Chromium-free brick is used for RH inner lining of furnace, the service life of lower channel 15 stove higher than magnesite-chrome brick, the use inside dip pipe
Life-span high 10 stove, 50 stove of high life at remaining position.
Embodiment 2
Chromium-free brick of the present invention is prepared, is comprised the following steps：
A, by 18 weight portion of fused magnesite coarse granule, 25 weight of 20 weight portion of fused magnesite fine grained and fused magnesite fine powder
Part mixes, and is preheated to more than 550 DEG C, obtains magnesia compound；
B, 5 weight portion of metallic aluminium of purity ＞ 98% is melted at 700～720 DEG C after, be added in magnesia compound,
Mix, till whole magnesia particle surfaces apply and are covered with sheet metal aluminium；
C, sequentially add 10 weight portion of AZS, 10 weight portion of electric smelting aluminium riched spinel powder, 3 weight of Alpha-alumina micro mist
Amount 2 weight portion of part and light-magnesite powder, mixes 40～60min, adds 3 weight portion of liquid phenolic resin, then mix
40min, obtains chromium-free brick compound；
D, the chromium-free brick compound for obtaining step c are pressed into chromium-free brick adobe under 800MPa pressure, through 110 DEG C of dryings
After 24h, 10～15h is heat-treated at 200～300 DEG C, obtains final product chromium-free brick.
Chromium-free brick is used for RH inner lining of furnace, the service life of lower channel 22 stove higher than magnesite-chrome brick, the use inside dip pipe
Life-span high 12 stove, 60 stove of high life at remaining position.
Embodiment 3
Chromium-free brick of the present invention is prepared, is comprised the following steps：
A, by 16 weight portion of fused magnesite coarse granule, 22 weight of 23 weight portion of fused magnesite fine grained and fused magnesite fine powder
Part mixes, and is preheated to more than 550 DEG C, obtains magnesia compound；
B, 8 weight portion of metallic aluminium of purity ＞ 98% is melted at 700～720 DEG C after, be added in magnesia compound,
Mix, till whole magnesia particle surfaces apply and are covered with sheet metal aluminium；
C, sequentially add 14 weight portion of AZS, 13 weight portion of electric smelting aluminium riched spinel powder, 4 weight of Alpha-alumina micro mist
Amount 3 weight portion of part and light-magnesite powder, mixes 40～60min, adds 4 weight portion of liquid phenolic resin, then mix
40min, obtains chromium-free brick compound；
D, the chromium-free brick compound for obtaining step c are pressed into chromium-free brick adobe under 800MPa pressure, through 110 DEG C of dryings
After 24h, 10～15h is heat-treated at 200～300 DEG C, obtains final product chromium-free brick.
Chromium-free brick is used for RH inner lining of furnace, the service life of lower channel 30 stove higher than magnesite-chrome brick, the use inside dip pipe
Life-span high 15 stove, 70 stove of high life at remaining position.
Claims (3)
1. the method for preparing chromium-free brick, it is characterised in that：Comprise the following steps：
A, by fused magnesite coarse granule, fused magnesite fine grained and fused magnesite fine powder mix, be preheated to more than 550 DEG C, obtain
Magnesia compound；
B, metallic aluminium is melted at 700～720 DEG C after, be added in magnesia compound, mix, until whole magnesia particle tables
Face is applied till being covered with sheet metal aluminium；
C, AZS, electric smelting aluminium riched spinel powder, Alpha-alumina micro mist and light-magnesite powder is sequentially added, mix 40
～60min, adds liquid phenolic resin, then mixed 35～45min, obtains chromium-free brick compound；
D, the chromium-free brick compound for obtaining step c are pressed into chromium-free brick adobe under 800MPa pressure, dry through 100～120 DEG C
After dry 20～36h, 10～15h is heat-treated at 200～300 DEG C, obtains final product chromium-free brick；
Wherein, in the chromium-free brick, the weight portion of each composition is：
Wherein, 5mm≤fused magnesite coarse granule particle diameter≤8mm, 3mm≤fused magnesite fine grained particle diameter ＜ 5mm, 1mm≤electric smelting
Magnesia powder particle diameter ＜ 3mm.
2. the method for preparing chromium-free brick according to claim 1, it is characterised in that：Mix using in rotating speed 80 in a steps
Batch mixing 10min in the mortar mixer of～150rpm.
3. the method for preparing chromium-free brick according to claim 1, it is characterised in that：In Step d, Chrome-free brick adobe is through 110 DEG C
Dry 24h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510670471.8A CN105218116B (en) | 2015-10-13 | 2015-10-13 | A kind of chromium-free brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510670471.8A CN105218116B (en) | 2015-10-13 | 2015-10-13 | A kind of chromium-free brick and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105218116A CN105218116A (en) | 2016-01-06 |
| CN105218116B true CN105218116B (en) | 2017-03-15 |
Family
ID=54987467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510670471.8A Active CN105218116B (en) | 2015-10-13 | 2015-10-13 | A kind of chromium-free brick and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105218116B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946550B (en) * | 2017-04-12 | 2019-08-02 | 浙江自立高温科技有限公司 | A kind of magnesia-spinel brick and preparation method thereof that antistrip performance is excellent |
| CN109809808B (en) * | 2017-11-20 | 2021-09-07 | 鞍山市和丰耐火材料有限公司 | Slag-erosion-resistant magnesium spinel brick for smelting fine steel and preparation method thereof |
| CN107935562B (en) * | 2017-12-02 | 2020-09-25 | 山东鲁桥新材料股份有限公司 | Chromium-free brick for high-temperature zone of dry-process cement kiln and preparation method thereof |
| CN113603459A (en) * | 2020-06-04 | 2021-11-05 | 济南鲁东耐火材料有限公司 | Carbon-free unburned magnesia-alumina brick and preparation method thereof |
-
2015
- 2015-10-13 CN CN201510670471.8A patent/CN105218116B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105218116A (en) | 2016-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101429037B (en) | Aluminum-carbon sliding tile and method of producing the same | |
| CN103588494B (en) | Sliding brick and preparation method thereof | |
| CN105174983B (en) | A kind of RH liners magnesia-spinel brick and preparation method thereof | |
| CN103467120B (en) | Non-phosphorus and low-carbon alumina-magnesia unburned brick for stainless steel ladle and manufacturing method of brick | |
| CN101525245B (en) | High strength non-cement corundum castable material used in heating furnace | |
| CN104591752B (en) | Burnt magnesia spinel brick for RH refining furnace dip pipe and circulating pipe and preparation method thereof | |
| CN107352977A (en) | A kind of slag line brick for ladle and preparation method | |
| CN105218116B (en) | A kind of chromium-free brick and preparation method thereof | |
| CN101544504A (en) | Phosphate-bonded aluminum silicon carbide brick and preparation method thereof | |
| CN102093065B (en) | Magnesia carbon brick taking composite magnesia as major raw material and preparation method thereof | |
| CN103408311B (en) | Gunning mix for repairing RH refractory brick | |
| CN104926326A (en) | Al2O3-MgO-SiC-C brick for ladle working linings and preparation method thereof | |
| CN107032805A (en) | A kind of ladle Ultra-low carbon Periclase spinel carbon brick and preparation method | |
| CN102336539A (en) | Waste utilization regeneration baking-free magnesia chrome brick and preparation method thereof | |
| CN100471821C (en) | Blast furnace mixer casting material | |
| CN103936441B (en) | A kind ofly reclaim and utilize the making method of the fast dry type anti-explosion refractory castable of scrap iron ditch reworked material | |
| CN108083765A (en) | Low heat conduction anti-strip brick and preparation method thereof | |
| CN104844233A (en) | Special fire-proof material for combustion furnace and preparation method thereof | |
| CN101423412B (en) | Method for preparing high performance silicon oxide combining silicon carbide refractory by low-temperature sintering | |
| CN105152668B (en) | A kind of RH liners chromium-free brick and preparation method thereof | |
| CN104446530B (en) | A kind of preparation technology of ladle slag line refractory brick | |
| CN106083092A (en) | A kind of anti-slag permeability preferable low cost tundish dry material and preparation method thereof | |
| CN108585797A (en) | A kind of magnesia pushing off the slag sliding plate brick of self-lubricating and preparation method thereof of addition boron nitride | |
| CN105272198A (en) | High-temperature anti-corrosion coating material, and usage method and application thereof | |
| CN108526452B (en) | A kind of quick baking type tundish dry material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |