CN104016689A - Low cement castable - Google Patents
Low cement castable Download PDFInfo
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- CN104016689A CN104016689A CN201410228196.XA CN201410228196A CN104016689A CN 104016689 A CN104016689 A CN 104016689A CN 201410228196 A CN201410228196 A CN 201410228196A CN 104016689 A CN104016689 A CN 104016689A
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Abstract
The invention relates to a low cement castable, which comprises the following components by weight: 30-40 parts of 5-3 mm corundum, 10-20 parts of 3-1 mm corundum, 5-10 parts of 1-0 mm super grade bauxite, 5-15 parts of1-0mm SiC, 8-15 parts of sub-white corundum powder of 200 mesh, 3-8 parts of alumina powder, 4-7 parts of high purity silica powder, 6-8 parts of bauxite micropowder, 5-7 parts of Lafarge-71cement, 1-2 parts of 446 steel fiber, 0.04-0.1 part of explosion-proof fiber and 0.1-0.2 part of sodium hexametaphosphate. The invention has the beneficial effect that a cement kiln prepared from the material has the advanategs of good wear resistance and high toughness, and the material has alkali corrosion resistance, strong high temperature strength and good thermal shock resistance performance.
Description
Technical field
The present invention relates to a kind of low cement deposit material.
Background technology
The rotary kiln bend for triple air hose of Modern New dry cement production line, flashboard, because of working conditions harshness, the life-span is extremely low, cannot accomplish the overhaul time lock annual with cement production enterprise, and promoting its work-ing life is the task of top priority.
Bend for triple air hose of cement kiln, not only will bear the serious caustic corrosion under the working temperature of 800 ~ 1200 DEG C, and is subjected to all the time the high velocity air of carrying grog particle secretly and washes away, well damage.Adopt high alumina castable only can maintain one month, mullite corundum mould material is also only used four months.Need mould material both to possess enough wear resistancies, ensure that material stands and wash away under action of high-speed airflow, that avoids causing peels off, falls piece, allows again mould material stand alkaline gas and corrodes for a long time, possesses good alkaline resistance properties.
Taking Ningguo of conch group cement mill as example, the three linear diameter 4.8M of the said firm, long 74M, the bend for triple air hose of 5000T/D nsp kiln just successively used multiple material, generally only can maintain the work-ing life about four months, do not reach the basic demand of factory's overhaul, conventionally adopt " packing box " to do emergency processing.My company, at the beginning of 2005, coordinates the engineering requirement in Ningguo cement mill, has researched and developed super intensified abrasion-proof pouring material (RT-85), and this product has met requirements after using completely, and its life-span was up to 3 years.
Super intensified abrasion-proof pouring material (RT-85) has totally been produced 30,000 tons since going into operation, and the output value reaches more than 200,000,000 yuan.Be widely used in conch group, China Resources group, Ji Dong group, Tai Ni group, Zhong Lian group, the bend for triple air hose of approximately 300 production line large-sized rotary kilns such as southern group, flashboard and grate-cooler throat, the high abrasion positions such as air port are got in cogeneration.
Summary of the invention
The invention reside in a kind of low cement deposit material is provided, through well-designed, strengthening matrix is also optimized the chemical constitution of mould material, to guarantee the excellent properties of material.
Aggregate part, with corundum, high grade bauxite is main, and corundum fusing point is up to 2050 DEG C, and thermal expansivity is 8.6 × 10
-6k
-1,, hardness is 9, thereby gives the wear resisting property that material is very strong; Silicon carbide has high-melting-point, high rigidity, high heat conduction, low bulk and oxidable characteristic.Corundum not only makes wear resisting property good, and the thermal shock resistance of material is also improved, under oxidizing atmosphere:
SiC + 3/2O
2 → SiO
2 + CO
Form SiO
2glaze shape protective membrane, stops the erosion of alkaline gas, the alkaline resistance properties of strongthener.
Matrix part, adopts alumina powder, high-purity silicon oxide micro mist, the compound super-fine powder of the many components of alumina micro mist, makes the dispersiveness of material, and filling is improved, thereby the workability of material is significantly improved.
Silicon oxide super-fine powder has promoted mullitization to react with alumina powder:
3Al
2o
3+ 2SiO
2→ 3Al
2o
3.2SiO
2(mullite)
Adding of ultrafine silica powder makes mould material before 80 DEG C, produce hydrogen bonded, 80～600 DEG C time because of dehydration reaction:
SiO
2-Si-OH+HO-Si-SiO
2→ SiO
2-Si-O-Si-SiO
2+ H
2O
Form firmly Si-O-Si key, present three-dimensional reticulated structure, improved bonding strength;
In sum, this proportioning composition had both made matrix strengthening, allowed again aggregate and matrix Optimized Matching, had added heat-resistant steel fiber, not only increased wear resistance but also improved toughness.Thereby ensure that material obtains alkali resistant corrosion, hot strength is high, the good many performances of thermal shock resistance.
In order comprehensively to pass judgment on material property, detect normal temperature, high temperature physicochemical property and alkali resistant test, normal temperature cut resistance test.
According to above analysis, design low cement deposit material composition following (weight part ratio):
30 ~ 40 parts of corundum 5 ~ 3mm
10 ~ 20 parts of corundum 3 ~ 1mm
5 ~ 10 parts of high grade bauxite 1 ~ 0mm
5 ~ 15 parts of silicon carbide 1 ~ 0mm
8 ~ 15 parts, sub-white corundum powder 200 order
3 ~ 8 parts of alumina powders
4 ~ 7 parts of high-purity silicon oxide micro mists
6 ~ 8 parts of alumina micro mists
5 ~ 7 parts of Lafarge-71 cement
446 1 ~ 2 part of steel fiber
0.04 ~ 0.1 part of explosion-proof fiber
0.1 ~ 0.2 part of Sodium hexametaphosphate 99.
Concrete, described corundum, high grade bauxite, silicon carbide, sub-white corundum powder, alumina powder, high-purity silicon oxide micro mist, alumina micro mist, Lafarge-71 cement, 446 steel fibers, explosion-proof fiber, Sodium hexametaphosphate 99 are commercially available refractory raw material or industrial chemicals.
The process for preparation of material is that above various solid material is weighed by predetermined proportioning, and after mixing, through weighing, packaging becomes packed unshape refractory.When use, take packaging apart, pour material into stirrer, add water and stir into mould material, cast on request, then through maintenance, dry, baking use.
Beneficial effect: the cement kiln of making by this material has that wear resistance is good, toughness advantages of higher, and material has the performance of alkali resistant corrosion, and hot strength is high, the good many performances of thermal shock resistance.
Embodiment
Embodiment 1
A kind of low cement deposit material, its chief component is as follows by weight:
35 parts of corundum 5 ~ 3mm
15 parts of corundum 3 ~ 1mm
8 parts of high grade bauxite 1 ~ 0mm
10 parts of silicon carbide 1 ~ 0mm
10 parts, sub-white corundum powder 200 order
5 parts of alumina powders
4 parts of high-purity silicon oxide micro mists
6 parts of alumina micro mists
7 parts of Lafarge-71 cement
446 1.5 parts of steel fibers
0.08 part of explosion-proof fiber
0.15 part of Sodium hexametaphosphate 99
5.2 parts, water
Various solid materials are weighed by predetermined proportioning, and mixing and water adding stirs, and sample preparation, reaches following performance after testing
1, physicochemical property
| Volume density g .cm -3 | Folding strength/MPa | Compressive strength/MPa | Line velocity of variation/% | |
| 110℃/24h | 3.06 | 21.33 | 169.35 | 0.01 |
| 1100℃/3h | 3.02 | 17.21 | 154.39 | -0.14 |
| 1350℃/3h | 3.05 | 16.97 | 125.74 | -0.17 |
2, alkali resistant: one-level (GB10696-89).
3, normal temperature wear resistance: 4.6/cm
3(GB/T18301-2001).
Embodiment 2
A kind of low cement deposit material, its chief component is as follows by weight:
32 parts of corundum 5 ~ 3mm
18 parts of corundum 3 ~ 1 mm
8 parts of high grade bauxite 1 ~ 0mm
11 parts of silicon carbide 1 ~ 0mm
12 parts, sub-white corundum powder
3 parts of alumina powders
4 parts of high-purity silicon oxide micro mists
6 parts of alumina micro mists
6 parts of Lafarge-71 cement
446 1.2 parts of steel fibers
0.05 part of explosion-proof fiber
0.12 part of Sodium hexametaphosphate 99
5 parts, water
Various body raw materials are weighed by predetermined proportioning, and mixing and water adding stirs, and sample preparation, reaches following performance after testing:
1, physicochemical property:
| Volume density g .cm -3 | Folding strength/MPa | Compressive strength/MPa | Line velocity of variation/% | |
| 110℃/24h | 3.04 | 19.69 | 163.37 | 0.02 |
| 1100℃/3h | 3.01 | 17.88 | 159.10 | -0.16 |
| 1350℃/3h | 3.02 | 15.89 | 130.44 | -0.19 |
2, alkali resistant: one-level (GB10696-89).
3, normal temperature wear resistance: 4.8/cm
3(GB/T18301-2001).
Claims (3)
1. a low cement deposit material, is characterized in that: its main component is as follows by weight:
30 ~ 40 parts of corundum 5 ~ 3mm
10 ~ 20 parts of corundum 3 ~ 1mm
5 ~ 10 parts of high grade bauxite 1 ~ 0mm
5 ~ 15 parts of silicon carbide 1 ~ 0mm
8 ~ 15 parts, sub-white corundum powder 200 order
3 ~ 8 parts of alumina powders
4 ~ 7 parts of high-purity silicon oxide micro mists
6 ~ 8 parts of alumina micro mists
5 ~ 7 parts of Lafarge-71 cement
446 1 ~ 2 part of steel fiber
0.04 ~ 0.1 part of explosion-proof fiber
0.1 ~ 0.2 part of Sodium hexametaphosphate 99.
2. the low cement deposit material of one according to claim 1, it is characterized in that: described corundum, high grade bauxite, silicon carbide, sub-white corundum powder, alumina powder, high-purity silicon oxide micro mist, alumina micro mist, pure calcium aluminate cement, 446 steel fibers, explosion-proof fiber, Sodium hexametaphosphate 99 are commercially available refractory raw material or industrial chemicals.
3. according to claim 1 or the low cement deposit material of one claimed in claim 2, it is characterized in that: the preparation method of described low cement deposit material is: take by weight each constitutive material, after being uniformly mixed by packaging bags.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410228196.XA CN104016689A (en) | 2014-05-27 | 2014-05-27 | Low cement castable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410228196.XA CN104016689A (en) | 2014-05-27 | 2014-05-27 | Low cement castable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104016689A true CN104016689A (en) | 2014-09-03 |
Family
ID=51433747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410228196.XA Pending CN104016689A (en) | 2014-05-27 | 2014-05-27 | Low cement castable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104016689A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104788105A (en) * | 2015-03-17 | 2015-07-22 | 北京利尔高温材料股份有限公司 | Desulphurization gun castable for nickel iron ladles, and preparation method and application thereof |
| CN105130480A (en) * | 2015-10-23 | 2015-12-09 | 攀枝花钢城集团有限公司 | High alumina refractory castable for rotary kiln |
| CN109336627A (en) * | 2018-12-04 | 2019-02-15 | 攀枝花钢城集团有限公司 | Aluminium melting furnace furnace lining castable and its preparation and application |
| CN115716743A (en) * | 2022-10-31 | 2023-02-28 | 荆门雷法耐火科技有限公司 | Aramid fiber explosion-proof castable |
-
2014
- 2014-05-27 CN CN201410228196.XA patent/CN104016689A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104788105A (en) * | 2015-03-17 | 2015-07-22 | 北京利尔高温材料股份有限公司 | Desulphurization gun castable for nickel iron ladles, and preparation method and application thereof |
| CN104788105B (en) * | 2015-03-17 | 2017-01-25 | 北京利尔高温材料股份有限公司 | Desulphurization gun castable for nickel iron ladles, and preparation method and application thereof |
| CN105130480A (en) * | 2015-10-23 | 2015-12-09 | 攀枝花钢城集团有限公司 | High alumina refractory castable for rotary kiln |
| CN109336627A (en) * | 2018-12-04 | 2019-02-15 | 攀枝花钢城集团有限公司 | Aluminium melting furnace furnace lining castable and its preparation and application |
| CN115716743A (en) * | 2022-10-31 | 2023-02-28 | 荆门雷法耐火科技有限公司 | Aramid fiber explosion-proof castable |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140903 |
|
| WD01 | Invention patent application deemed withdrawn after publication |