CN102765954A - Water system press-in grouting material used for iron making hot blast heater system and preparation method thereof - Google Patents
Water system press-in grouting material used for iron making hot blast heater system and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a water system press-in grouting material used for an iron making hot blast heater system and a preparation method thereof. The material includes the following components by weight: 72-81 parts of bauxite, 5-10 parts of corundum fine powder, 3-6 parts of alpha aluminum micro powder, 1 part to 3 parts of green clay, 1 part to 3 parts of bentonite, 1 part to 3 parts of kyanite, 0.5-1 part of yttrium oxide, 0.5-1 part of lanthanum oxide, 1 part to 2 parts of dextrin, 2-4 parts of silica gel powder, 1 part to 2 parts of silicon powder, 0.5-1 part of carboxymethylcellulose, 0.2-1 part of sodium tripolyphosphate and 0.2-1 part of sodium hexametaphosphate. The water system press-in grouting material adopts a three-grade matching main material, a composite rare earth materials, a composite binding agent and the like, greatly improves compactness, greatly improves normal temperature strength, improves strength constantly with rise of temperature, and is good in heat and shock resistance stability and strong in anti-erosion capability. Pulverization dropping cannot happen after the material is pressed in a furnace lining, and the material can serve as a simple, effective, energy-saving furnace device maintenance material.
Description
Technical field
The present invention relates to a kind of water system pressing-in grouting material of hot blast stove system and preparation method thereof that is used to smelt iron, belong to fire resisting material field.
Background technology
The ironmaking hot blast stove system of iron and steel enterprise is along with the maximization of blast furnace, the raising of combustion intensity, and the wind-warm syndrome of hot blast stove system and roof pressure are all improving; After hot blast stove system came into operation, because the hotblast stove strengthening smelting, the working conditions that the hotblast stove liner is born was more harsh; The damage phenomenon is also even more serious, and especially at burner port, hot air duct and pipeline junction temperature rising phenomenon are rather serious; Each short tube that links to each other with the hotblast stove body only is applicable to atmospheric operation, and when blast furnace carried out high wind-warm syndrome, the operation of high roof pressure, hot blast is responsible for distortion to be increased; Corresponding deflection increases, and causes rubescent, the distortion in junction, and local temperature is too high; In addition, hot blast short pipe receives the hot blast surging force for a long time, causes the corrugated tube stress deformation on the short tube to strengthen; Corrugated tube surface temperature difference when air-supply, burning stove, cold stoking is bigger in addition, and generation is expanded with heat and contract with cold, and makes corrugated tube frequently flexible; Reduced work-ing life, reasons such as part working lining cracking and through crack and structure cause the lagging material between hotblast stove liner and the furnace shell etc. to destroy, and form the cavity and cause the too high even furnace shell cracking in casing temperature part; Worsen production environment, influenced producers' safety, both wasted energy; Have a strong impact on the stable of short tube structure again, directly influenced the safety in production and the work-ing life of blast furnace.
At present traditional material that is pressed into has common refractory mortar and phosphate mud, and refractory mortar adds the clay wedding agent with the bauxitic clay fine powder and adds admixture and be prepared into, and does not almost have intensity when low in this material, warm; Make wedding agent because be with raw clay; Behind high temperature, produce to shrink, the big area crackle occurs, wash away repeatedly through the hot blast of HTHP; Occur powder of detached very soon, it is rubescent that secondary temperature elevation appears in device housings.Phosphate mud is as wedding agent with phosphoric acid; The most generally form through adding the water stirring at present with solid, powdery phosphoric acid salt; This mud oven drying at low temperature folding strength can not satisfy the combustion intensity of modern blast furnace ironmaking HTHP, and the position temperature that hot blast stove system need be in the milk is generally all at 300 ℃ about 1Mpa; Phosphate mud is just opened by the HTHP wind about a general week at this warm area; Cause the wind-warm syndrome blast of supplying with blast-furnace smelting to descend, the output that causes smelting iron descends greatly, has a strong impact on business economic benefit and production safety.Because several kinds of traditional existing defectives of material self that are pressed in the market, be pressed into furnace lining after material powder of detached appears soon, an expansion is advanced in the furnace lining slit; Casing temperature occurs rubescent repeatedly; Safety in production in serious threat, the repetitious pressing-in grouting of having to, even carry out large-area mending by replacing a damaged part and shutdown maintenance; Wasted great amount of manpower and material resources, the blowing out stopping production loss that causes simultaneously is huge; And repeatedly repeatedly shutdown maintenance aggravated the damage of furnace lining, shortened the work-ing life of equipment, wasted a large amount of Nonrenewable resources, brought enormous economic loss to enterprise.
Summary of the invention
The objective of the invention is to: in order to eliminate production hidden danger; Keep and continue the safety in production and the work-ing life of hotblast stove; Adopt the pressing-in grouting method to safeguard; In order to overcome the deficiency that present refractory mortar and phosphate mud are used for hot blast stove system grouting, just have very high intensity when a kind of low temperature is provided and be used to smelt iron the water system pressing-in grouting material of hot blast stove system along with the rising intensity of temperature improves constantly, compactness is good, anti-thermal shock is stable and corrosion resistance is strong.
Another object of the present invention is to: the preparation method that the said water system pressing-in grouting material that is used to smelt iron hot blast stove system is provided.
The invention provides a kind of water system pressing-in grouting material that is used to smelt iron hot blast stove system, each component prescription by weight is: alumine 72-81 part, corundum fine powder 5-10 part; αYang Hualv micro mist 3-6 part; Raw clay 1-3 part or wilkinite 1-3 part, kyanite 1-3 part, Y
2O
3(yttrium oxide) 0.5-1 part, La
2O
3(lanthanum trioxide) 0.5-1 part, dextrin 1-2 part, silica-gel powder 2-4 part, silicon ash 1-2 part, CMC 99.5 0.5-1 part, tripoly phosphate sodium STPP 0.2-1 part, Sodium hexametaphosphate 99 0.2-1 part.
Alumine according to the invention is commercially available bauxite chamotte, and aluminium sesquioxide content is no less than 83%, is processed as three grades of grating 1mm-0.5mm30%, and 0.5mm-0.1mm40% 0.1mm-0.076mm following 30%; Said corundum fine powder is commercially available, and granularity is not more than 0.076mm, and aluminium sesquioxide content is no less than 95%.; Said αYang Hualv micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Said wilkinite is commercially available wilkinite fine powder, and said kyanite is commercially available, and granularity is not more than 0.076mm; Said Y
2O
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,Granularity 3-5um, La
2O
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
,Granularity 3-6um.Said dextrin is the commercially available prod, and said silica-gel powder is the commercially available prod; Said silicon ash is the commercially available prod, and dioxide-containing silica is no less than 92%; Said CMC 99.5 is the commercially available prod, and for fibrous, said tripoly phosphate sodium STPP is a premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is a technical grade, and content is no less than 68%.
The preparation method of the water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention is: earlier alumine, corundum fine powder, αYang Hualv micro mist, raw clay or wilkinite, kyanite press the formula rate mixing, stir; With yttrium oxide and lanthanum trioxide mixture, dextrin, silica-gel powder, silicon ash, CMC 99.5 tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mixture, press formula rate and mix again, stir; With the material that mixes for above-mentioned twice, join the double worm mixer back discharging packing warehouse-in that stirs.
During use, feed intake, add the tap water of siccative weight 20-26%, can use after stirring according to the engineering consumption.
The water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention just has very high intensity during low temperature, and along with the rising intensity of temperature improves constantly; Compactness is good; Anti-thermal shock stability and corrosion resistance are strong, can bear washing away of high-temperature high-pressure air flow for a long time and can powder of detached, can be integrated with mother metal; Simple to operation, efficiently solve iron and steel enterprise's hot blast stove system and scurry wind because of furnace lining and cause the rubescent difficult problem of furnace shell.
The preparation method of water system pressing-in grouting material of the present invention is simple, mature production technology, and result of use is obvious, can improve kiln work-ing life greatly, is prone to as applies.
Embodiment
The batching explanation of the water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention:
1: main material special grade bauxite adopts three grades, and corundum fine powder adds by being not more than the 0.076mm granularity, and it is more whole that material can be formed.
2: added composite rare earth material.Y
2O
3(yttrium oxide), La
2O
3(lanthanum trioxide) two kinds of rare earth oxides add simultaneously; Can improve the normal temperature mechanical property, sintering strength improves greatly simultaneously, and the compactness of strongthener is good; Void content is reduced greatly; Because rare earth has HMP (more than 2000 ℃), and can generate composite oxides, improve the anti-thermal shock stability and the corrosion resistance of material with other MOX effect.
3: dextrin, CMC 99.5 are formed the adding of compound organic bond and silica-gel powder, can effectively improve normal temperature strength.The high efficiency water reducing agent that tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 are formed.Can reduce the add-on of moisture, tripoly phosphate sodium STPP can also increase the dispersiveness of material, makes material form suspension, and material has good flowability, and the grouting tube wall that under transfer pressure, can not bond can not stop up grout pipe, has good workability.
4: raw clay, bentonitic adding, can advance one one and improve intermediate sintering temperature intensity.
5: added the kyanite fine powder, the αYang Hualv micro mist has improved high temperature sintering intensity and compactness like this; Because the expansion effect during kyanite fine powder sintering has been offset the burning of organic materials and some low melting points and has been lost, and has improved the high temperature bulk strength; Do not ftracture, do not come off.
Below in conjunction with embodiment the present invention is elaborated.
Embodiment 1:
Take by weighing alumine 78kg, corundum fine powder 6 kg, αYang Hualv micro mist 4 kg, raw clay 3kg, kyanite 2 kg, Y
2O
3(yttrium oxide) 0.6 kg; La
2O
3(lanthanum trioxide) 0.9 kg, dextrin 1 kg, silica-gel powder 2.5 kg, silicon ash 1 kg, CMC 99.5 0.5 kg; Tripoly phosphate sodium STPP 0.25 kg, Sodium hexametaphosphate 99 0.25 kg.Earlier special grade bauxite, corundum fine powder, αYang Hualv micro mist, raw clay, wilkinite, kyanite are pressed formula rate and mix, stir; With yttrium oxide and lanthanum trioxide mixture, dextrin, silica-gel powder, silicon ash, CMC 99.5 tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mixture, press formula rate and mix again, stir; With the material that mixes for above-mentioned twice, join the double worm mixer back discharging packing warehouse-in that stirs.
By the water that adds of gross weight 22%, can use after stirring during use.
Adding water 22% back that stirs detects performance index and is: Al
2O
375.22%, 1790 ℃ of refractoriness, cold conditions folding strength: 110 ℃ * 24H 4.3Mpa; 1100 ℃ * 3H, 7.5 Mpa; 1300 ℃ * 3H, 10.8 Mpa.
Embodiment 2:
Take by weighing special grade bauxite 76 kg, corundum fine powder 9 kg, αYang Hualv micro mist 3 kg, raw clay 1.5 kg, wilkinite 1.5 kg, kyanite 1.5 kg, Y
2O
3(yttrium oxide) 0.52 kg, La
2O
3(lanthanum trioxide) 0.78kg, dextrin 1 kg, silica-gel powder 2.7 kg, silicon ash 1.2 kg, CMC 99.5 0.5 kg, tripoly phosphate sodium STPP 0.25kg, Sodium hexametaphosphate 99 0.35kg make the water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention by embodiment 1 identical preparation method.
By the water that adds of gross weight 21%, stir more than 15 minutes during use until evenly using.
Adding water 21% back that stirs by prescription detects performance index and is: Al
2O
376.08%, 1790 ℃ of refractoriness, cold conditions folding strength: 110 ℃ * 24H 4.6Mpa; 1100 ℃ * 3H 8.0Mpa; 1300 ℃ * 3H 11.1Mpa.
Embodiment 3:
Take by weighing alumine 75 kg, corundum fine powder 8 kg, αYang Hualv micro mist 4 kg, wilkinite 3kg, kyanite 2 kg, Y
2O
3(yttrium oxide) 0.64kg, La
2O
3(lanthanum trioxide) 0.96kg, dextrin 1.1 kg, silica-gel powder 2.9kg, silicon ash 1.3 kg, methylcellulose gum 0.4 kg, tripoly phosphate sodium STPP 0.3 kg, Sodium hexametaphosphate 99 0.4kg make the water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention by embodiment 1 identical preparation method.
By the water that adds of gross weight 21%, can use after stirring during use.
Adding water 21% back that stirs by prescription detects performance index and is: Al
2O
375.95%, 1790 ℃ of refractoriness, cold conditions folding strength: 110 ℃ * 24H 4.9Mpa; 1100 ℃ * 3H 7.3Mpa; 1300 ℃ * 3H 10.6Mpa.
Water system pressing-in grouting material of the present invention is functional, and low temperature intensity is high, and medium temperature intensity does not descend, and along with the rising of temperature constantly raises, refractoriness is high.Use through tens big-and-middle-sized iron and steel enterprises ironmaking hot blast stove systems has all reached very ideal effect, has prolonged kiln work-ing life, has produced better economic and social benefit.
The performance index of water system pressing-in grouting material according to the invention are following:
Embodiment 4:
Present embodiment is got alumine 81 kg, corundum fine powder 5 kg, αYang Hualv micro mist 6 kg, raw clay 1 kg, wilkinite 3 kg, kyanite 1 kg, Y
2O
3(yttrium oxide) 1 kg, La
2O
3(lanthanum trioxide) 0.5 kg, dextrin 2 kg, silica-gel powder 2 kg, silicon ash 1 kg, CMC 99.5 0.5 kg, tripoly phosphate sodium STPP 0.2 kg, Sodium hexametaphosphate 99 0.2 kg.Wherein alumine is commercially available bauxite chamotte, and aluminium sesquioxide content is 83%, is processed as three grades of grating 1mm-0.5mm30%, and 0.5mm-0.1mm40% 0.1mm-0.076mm following 30%; Said corundum fine powder is commercially available, and granularity is not more than 0.076mm, and aluminium sesquioxide content is no less than 95%.; Said αYang Hualv micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Said wilkinite is commercially available wilkinite fine powder, and said kyanite is commercially available, and granularity is not more than 0.076mm; Said Y
2O
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,Granularity 3-5um, La
2O
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
,Granularity 3-6um.Said dextrin is the commercially available prod, and said silica-gel powder is the commercially available prod; Said silicon ash is the commercially available prod, and dioxide-containing silica is no less than 92%; Said CMC 99.5 is the commercially available prod, and for fibrous, said tripoly phosphate sodium STPP is a premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is a technical grade, and content is no less than 68%.Make the water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention by embodiment 1 identical preparation method.
By the water that adds of gross weight 20%, stir more than 15 minutes during use until evenly using.
Embodiment 5:
Present embodiment is got alumine 72 kg, corundum fine powder 10 kg, αYang Hualv micro mist 5 kg, raw clay 2 kg, wilkinite 1 kg, kyanite 1 kg, Y
2O
3(yttrium oxide) 0.5 kg, La
2O
3(lanthanum trioxide) 1 kg, dextrin 1.5 kg, silica-gel powder 4 kg, silicon ash 2 kg, CMC 99.5 1.0 kg, tripoly phosphate sodium STPP 1 kg, Sodium hexametaphosphate 99 1.0 kg.Wherein alumine is commercially available bauxite chamotte, and aluminium sesquioxide content is 83%, is processed as three grades of grating 1mm-0.5mm30%, and 0.5mm-0.1mm40% 0.1mm-0.076mm following 30%; Said corundum fine powder is commercially available, and granularity is not more than 0.076mm, and aluminium sesquioxide content is no less than 95%.; Said αYang Hualv micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Said wilkinite is commercially available wilkinite fine powder, and said kyanite is commercially available, and granularity is not more than 0.076mm; Said Y
2O
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,Granularity 3-5um, La
2O
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
,Granularity 3-6um.Said dextrin is the commercially available prod, and said silica-gel powder is the commercially available prod; Said silicon ash is the commercially available prod, and dioxide-containing silica is no less than 92%; Said CMC 99.5 is the commercially available prod, and for fibrous, said tripoly phosphate sodium STPP is a premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is a technical grade, and content is no less than 68%.Make the water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention by embodiment 1 identical preparation method.
Add the water of dry substance gross weight 26% during use again, can use after stirring.
Embodiment 6:
Present embodiment is got alumine 80 kg, corundum fine powder 7 kg, αYang Hualv micro mist 5 kg, raw clay 2 kg, wilkinite 2 kg, kyanite 1kg, Y
2O
3(yttrium oxide) 0.8 kg, La
2O
3(lanthanum trioxide) 0.6 kg, dextrin 1.5 kg, silica-gel powder 3 kg, silicon ash 1.5 kg, CMC 99.5 0.8 kg, tripoly phosphate sodium STPP 0.6 kg, Sodium hexametaphosphate 99 0.8 kg.Wherein alumine is commercially available bauxite chamotte, and aluminium sesquioxide content is 83%, is processed as three grades of grating 1mm-0.5mm30%, and 0.5mm-0.1mm40% 0.1mm-0.076mm following 30%; Said corundum fine powder is commercially available, and granularity is not more than 0.076mm, and aluminium sesquioxide content is no less than 95%.; Said αYang Hualv micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Said wilkinite is commercially available wilkinite fine powder, and said kyanite is commercially available, and granularity is not more than 0.076mm; Said Y
2O
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,Granularity 3-5um, La
2O
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
,Granularity 3-6um.Said dextrin is the commercially available prod, and said silica-gel powder is the commercially available prod; Said silicon ash is the commercially available prod, and dioxide-containing silica is no less than 92%; Said CMC 99.5 is the commercially available prod, and for fibrous, said tripoly phosphate sodium STPP is a premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is a technical grade, and content is no less than 68%.Make the water system pressing-in grouting material that is used to smelt iron hot blast stove system according to the invention by embodiment 1 identical preparation method.
Add water by gross weight 25% during use, can use after stirring.
Claims (10)
1. one kind is used to smelt iron the water system pressing-in grouting material of hot blast stove system, and it is characterized in that: each component proportioning by weight is: alumine 72-81 part, corundum fine powder 5-10 part; αYang Hualv micro mist 3-6 part, raw clay 1-3 part or wilkinite 1-3 part, kyanite 1-3 part; Yttrium oxide 0.5-1 part, lanthanum trioxide 0.5-1 part, dextrin 1-2 part, silica-gel powder 2-4 part; Silicon ash 1-2 part, CMC 99.5 0.5-1 part, tripoly phosphate sodium STPP 0.2-1 part, Sodium hexametaphosphate 99 0.2-1 part.
2. according to the said water system pressing-in grouting of claim 1 material, it is characterized in that: alumine is a bauxite chamotte, and wherein aluminium sesquioxide content is no less than 83%, is three grades of grating 1mm-0.5mm30%, 0.5mm-0.1mm40% 0.1mm-0.076mm30%.
3. according to the said water system pressing-in grouting of claim 1 material, it is characterized in that: the corundum fine powder granularity is not more than 0.076mm, and aluminium sesquioxide content is no less than 95%.
4. according to the said water system pressing-in grouting of claim 1 material, it is characterized in that: αYang Hualv micro mist granularity is not more than 5um, and aluminium sesquioxide content is no less than 85%.
5. according to the said water system pressing-in grouting of claim 1 material, it is characterized in that: the kyanite granularity is not more than 0.076mm, and aluminium sesquioxide content is no less than 50%.
6. according to the said water system pressing-in grouting of claim 1 material, it is characterized in that: yttrium oxide is a regular grade, and content is no less than 99.9%, granularity 3-5um; Lanthanum trioxide is a regular grade, content 99.5-99.9%, granularity 4-6um.
7. according to the said water system pressing-in grouting of claim 1 material, it is characterized in that: tripoly phosphate sodium STPP is a premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is a technical grade, and content is no less than 68%.
8. according to the said water system pressing-in grouting of claim 1 material, it is characterized in that: the silicon ash is no less than 92% for dioxide-containing silica.
9. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 said water system pressing-in grouting material; It is characterized in that: the preparation method is: earlier alumine, corundum fine powder, αYang Hualv micro mist, raw clay, wilkinite, kyanite are pressed formula rate and mix, stir; With yttrium oxide and lanthanum trioxide mixture, dextrin, silica-gel powder, silicon ash, CMC 99.5, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mixture, press formula rate and mix again, stir; With the material that mixes for above-mentioned twice, join the double worm mixer back discharging packing warehouse-in that stirs.
10. according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 said water system pressing-in grouting material, it is characterized in that: add the water of dry substance weight 20-26% during use again, stir, get final product.
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| CN104058756A (en) * | 2014-06-16 | 2014-09-24 | 北京首钢股份有限公司 | Buffering filler fed by pump and used for thermal-state maintenance of hot-blast stove system |
| CN104591754A (en) * | 2014-12-29 | 2015-05-06 | 安徽马钢耐火材料有限公司 | Novel high aluminum mortar and preparation method thereof |
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| CN104058756A (en) * | 2014-06-16 | 2014-09-24 | 北京首钢股份有限公司 | Buffering filler fed by pump and used for thermal-state maintenance of hot-blast stove system |
| CN104591754A (en) * | 2014-12-29 | 2015-05-06 | 安徽马钢耐火材料有限公司 | Novel high aluminum mortar and preparation method thereof |
| CN104944978A (en) * | 2015-05-29 | 2015-09-30 | 萍乡市科兴窑炉材料有限公司 | Efficient and energy-saving type high temperature mortar for cement rotary kilns, and preparation method thereof |
| CN106045540A (en) * | 2016-07-19 | 2016-10-26 | 郑州鑫源防磨耐材有限公司 | High-strength wearing-resistant refractory casting material |
| CN113121211A (en) * | 2021-04-06 | 2021-07-16 | 河南众投冶金材料有限公司 | High-strength refractory mortar and preparation method thereof |
| CN115448685A (en) * | 2022-08-29 | 2022-12-09 | 中冶武汉冶金建筑研究院有限公司 | Acid-resistant pouring material for top of hot blast stove and preparation method and construction method thereof |
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