CN109942287A - A kind of waste incinerator anti-lime-ash attachment wear-resistant castable - Google Patents
A kind of waste incinerator anti-lime-ash attachment wear-resistant castable Download PDFInfo
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- CN109942287A CN109942287A CN201910310636.9A CN201910310636A CN109942287A CN 109942287 A CN109942287 A CN 109942287A CN 201910310636 A CN201910310636 A CN 201910310636A CN 109942287 A CN109942287 A CN 109942287A
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Abstract
A kind of waste incinerator anti-lime-ash attachment wear-resistant castable, belongs to wearing-proof refractory material technical field.Castable matches as follows by mass percentage: 0.088mm < partial size≤8mm corundum 5%~45%, 97 silicon carbide 10%~55% of 0.088mm < partial size≤3mm, granularity≤0.088mm silicon carbide micro-powder 0~15%, alumina powder 0~15%, fine silica powder 0~10%, granularity≤0.088mm additive 0~15%, bonding agent 5%~15% are another that additive 0~1% is added.Advantage is: the product has the characteristics that wearability is good, anti-lime-ash adhesion is strong, can be applied to the flying dusts attachment critical regions such as waste incinerator front and back arch, oblique top, side wall top, has a vast market foreground.
Description
Technical field
The invention belongs to wearing-proof refractory material technical fields, and it is resistance to the attachment of anti-lime-ash to specifically provide a kind of waste incinerator
Grind castable.
Background technique
Grate type incinerator mainly handles house refuse, and China's house refuse humidity is far longer than external incineration plant, and
And ash content is more complicated, therefore furnace atmosphere is also much harsher than external incineration plant.850 DEG C of the general temperature in incinerator combustion zone,
And in actual moving process, many incineration plant garbage disposal loads are heavier, and refuse thermal value rises year by year, and cause to burn burner hearth
Temperature can be significantly larger than design temperature.A large amount of flying dusts are generated in Refuse Incineration Process, flying dust can react shape at 800~1000 DEG C
At low glass lime-ash, it is attached to the refractory linings surfaces such as incinerator front and back arch area, side wall.Temperature is higher, and viscosity coefficient of dross is got over
It is low, it reacts more violent with refractory material, forms the high lime-ash adhesive layer of bond strength after reactive etching.Arch before and after incinerator at present
It is corundum-mullite or mullite system oxide material, reality that area, oblique top and after-combustion region refractory lining material design mostly
In the use process of border, garbage flying ash is easy and oxide material reactive etching.Excessive flying dust is attached to inboard wall of burner hearth, increases furnace
The weight bearing of thorax liner, especially front and back arch area side wall are easy to cause steel construction deformation and lining to be collapsed because weight bearing is excessive.Therefore, it burns
Burn furnace often because flying dust attachment is serious and blowing out deashing, seriously affect operational efficiency.
Since silicon carbide and silicon nitride belong to non-oxidic material, there is extremely strong covalence key characteristic, have many excellent
Physics and chemical property, such as: high mechanical strength and thermal conductivity, low thermal coefficient of expansion, good thermal shock resistance, resistant to chemical etching
Property etc..Compared with oxide material, non-oxidic material not only has that wearability is good, hardness is high and the spies such as good thermal shock
Point, and it is not easy wetting and good corrosion resistance.
The present invention introduces silicon powder and silicon nitride powder as additive, calcium aluminate water using corundum and silicon carbide as primary raw material
Mud is bonding agent, develops a kind of anti-lime-ash attachment wear-resistant castable, which has good wearability, good corrosion resistance and anti-ash
The features such as slag adhesion is strong can be applied to the flying dusts attachment critical regions such as waste incinerator front and back arch, oblique top, side wall top.
Summary of the invention
The purpose of the present invention is to provide a kind of anti-lime-ash of waste incinerator to adhere to wear-resistant castable, and solution alleviates rubbish
Garbage flying ash sticks at positions such as front and back arch area, oblique top and side wall tops, melts in rubbish burning process, and it is attached to generate a large amount of lime-ash
Layer problem.
A kind of waste incinerator anti-lime-ash attachment wear-resistant castable, matches as follows: 0.088mm < by mass percentage
Diameter≤8mm corundum 5%~45%, 97 silicon carbide 10%~55% of 0.088mm < partial size≤3mm, granularity≤0.088mm
Silicon carbide micro-powder 0~15%, alumina powder 0~15%, fine silica powder 0~10%, granularity≤0.088mm additive
0~15%, bonding agent 5%~15% is another that additive 0~1% is added.
The additive is in explosion-proof fiber, sodium tripolyphosphate, calgon, sodium lignin sulfonate or carboxylic esters
It is one or more of.
The additive is silicon powder and silicon nitride powder, and wherein mass percent matches are as follows: silicon powder 0~5%, silicon nitride powder 0
~10%.
The bonding agent is pure calcium aluminate cement.
The preparation method is that: first by 0.088mm < partial size≤8mm corundum 5%~45%, 0.088mm <
97 silicon carbide 10%~55% of partial size≤3mm, granularity≤0.088mm silicon carbide micro-powder 0~15%, alumina powder 0~
15%, fine silica powder 0~10%, bonding agent 5%~15% is pre-mixed；Sequentially add granularity≤0.088mm
Additive 0~15% and additive stir 3min with forced stirrer, add the water of 6wt%~8wt%, stir into one
Determine mobility castable, and by industry examination criteria requirement, moulding by casting is tried at intensity detection in particular mold by castable
Sample is corroded in sample, wear-resisting detection sample and the anti-flying dust infiltration of crucible.Sample molding after through natural curing, demoulding, drying and
After corresponding heat treatment, its performance indicator is detected.
Due to the not anti-flying dust adhiesion test evaluation method of current industry, this patent anti-folded of GB/T22459.4 room temperature
Knotting strength experimental method characterization, is made standard requirements test block for castable refractory, uses garbage flying ash as test binding material, warp
After 1350 DEG C × 3h high-temperature heat treatment, anti-lime-ash adhesion property is determined according to cold conditions flexural strength, in conjunction with field experience, detection
Sample adhesion strength is bigger, adheres to after live fusing fly ash to refractory material more serious.
The present invention has the advantages that the product has the characteristics that wearability is good, anti-lime-ash adhesion is strong, rubbish can be applied to
The flying dusts such as arch, oblique top, side wall top adhere to critical regions before and after incinerator, have a vast market foreground.
Specific embodiment
Embodiment 1
A kind of waste incinerator anti-lime-ash attachment wear-resistant castable, is matched by following mass percent and carries out ingredient:
0.088mm < partial size≤8mm corundum 45%, 97 silicon carbide 20% of 0.088mm < partial size≤3mm, granularity≤0.088mm
Silicon carbide micro-powder 5%, alumina powder 10%, fine silica powder 5%, 8% (silicon powder 3% of granularity≤0.088mm additive
+ silicon nitride powder 5%), bonding agent 7%, additive 0.5%, amount of water 6.5%.Testing result see the table below.
Embodiment 2
A kind of waste incinerator anti-lime-ash attachment wear-resistant castable, is matched by following mass percent and carries out ingredient:
0.088mm < partial size≤8mm corundum 30%, 97 silicon carbide 40% of 0.088mm < partial size≤3mm, alumina powder 10%,
Fine silica powder 5%, granularity≤0.088mm additive 10% (silicon powder 3%+ silicon nitride powder 7%), bonding agent 5% is additional
Agent 0.5%, amount of water 6%.Testing result see the table below.
Anti- lime-ash that the present invention develops adheres to wear-resistant castable, and site operation performance is good, wearability is good in use process, with
The corundum-mullite or mullite system oxide material of traditional design are compared, have excellent anti-lime-ash adhesion, Beijing, at
All, it is applied in the waste incinerations such as Chongqing, Kunming project, service life 1 year or more.
Claims (5)
1. a kind of waste incinerator adheres to wear-resistant castable with anti-lime-ash, which is characterized in that match by mass percentage as follows:
0.088mm < partial size≤8mm corundum 5%~45%, 97 silicon carbide 10%~55% of 0.088mm < partial size≤3mm, granularity
The silicon carbide micro-powder 0~15% of≤0.088mm, alumina powder 0~15%, fine silica powder 0~10%, granularity≤
The additive 0~15% of 0.088mm, bonding agent 5%~15% are another that additive 0~1% is added.
2. castable according to claim 1, which is characterized in that the additive is explosion-proof fiber, tripolyphosphate
One or more of sodium, calgon, sodium lignin sulfonate or carboxylic esters.
3. castable according to claim 1, which is characterized in that the additive be silicon powder and silicon nitride powder, wherein
Mass percent proportion are as follows: silicon powder 0~5%, silicon nitride powder 0~10%.
4. castable according to claim 1, which is characterized in that the bonding agent is pure calcium aluminate cement.
5. castable according to claim 1, which is characterized in that the preparation method of the castable is: first will
0.088mm < partial size≤8mm corundum 5%~45%, 97 silicon carbide 10%~55% of 0.088mm < partial size≤3mm, granularity
The silicon carbide micro-powder 0~15% of≤0.088mm, alumina powder 0~15%, fine silica powder 0~10%, bonding agent 5%
~15%, it is pre-mixed；Granularity≤0.088mm additive 0~15% and additive are sequentially added, forced stirrer is used
3min is stirred, the water of 6wt%~8wt% is added, stirs into the castable of mobility, and by industry examination criteria requirement, it will
Castable moulding by casting in particular mold is corroded and is tried at intensity detection sample, wear-resisting detection sample and the anti-flying dust infiltration of crucible
Sample.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910310636.9A CN109942287A (en) | 2019-04-17 | 2019-04-17 | A kind of waste incinerator anti-lime-ash attachment wear-resistant castable |
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| CN201910310636.9A CN109942287A (en) | 2019-04-17 | 2019-04-17 | A kind of waste incinerator anti-lime-ash attachment wear-resistant castable |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112094111A (en) * | 2020-08-25 | 2020-12-18 | 贵阳明通炉料有限公司 | Sol-bonded high-temperature high-strength wear-resistant castable and application method thereof |
| CN112250458A (en) * | 2020-11-25 | 2021-01-22 | 中钢集团洛阳耐火材料研究院有限公司 | Silicon carbide wall-hanging brick joint filling material |
| CN115925431A (en) * | 2022-12-26 | 2023-04-07 | 宜兴瑞泰耐火材料工程有限公司 | High-thermal-conductivity self-flow castable for water-cooled wall and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112094111A (en) * | 2020-08-25 | 2020-12-18 | 贵阳明通炉料有限公司 | Sol-bonded high-temperature high-strength wear-resistant castable and application method thereof |
| CN112250458A (en) * | 2020-11-25 | 2021-01-22 | 中钢集团洛阳耐火材料研究院有限公司 | Silicon carbide wall-hanging brick joint filling material |
| CN115925431A (en) * | 2022-12-26 | 2023-04-07 | 宜兴瑞泰耐火材料工程有限公司 | High-thermal-conductivity self-flow castable for water-cooled wall and preparation process thereof |
| CN115925431B (en) * | 2022-12-26 | 2023-09-05 | 宜兴瑞泰耐火材料工程有限公司 | High-heat-conductivity self-flowing castable for water-cooled wall and preparation process thereof |
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Application publication date: 20190628 |