CN102765954B - 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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- CN102765954B CN102765954B CN201210282995.6A CN201210282995A CN102765954B CN 102765954 B CN102765954 B CN 102765954B CN 201210282995 A CN201210282995 A CN 201210282995A CN 102765954 B CN102765954 B CN 102765954B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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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 ofly for smelting iron water system pressing-in grouting material of hot blast stove system and preparation method thereof, 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, the wind-warm syndrome of hot blast stove system and top are pressed all and are being improved, after hot blast stove system comes into operation, due to hotblast stove strengthening smelting, the working conditions that hotblast stove liner bears is more harsh, damage phenomenon is also even more serious, especially at burner port, hot air duct and pipeline junction temperature rise phenomenon are rather serious, each short tube being connected with hotblast stove body is only applicable to atmospheric operation, when blast furnace carries out high wind-warm syndrome, during high top press operation, hot blast main pipe distortion increases, corresponding deflection increases, cause junction rubescent, distortion, local temperature is too high, in addition, hot blast short pipe is subject to hot blast surging force for a long time, cause the corrugated tube stress deformation on short tube to strengthen, in addition corrugated tube is in air-supply, burn stove, during cold stoking, surface temperature difference is larger, generation is expanded with heat and contract with cold, make corrugated tube frequently flexible, reduced work-ing life, the reasons such as some work layer cracking and through crack and structure cause lagging material between hotblast stove liner and furnace shell etc. to destroy, form cavity and cause that casing temperature part is too high, even furnace shell ftractures, worsened production environment, affect producers' safety, both wasted energy, had a strong impact on again the stable of short tube structure, directly affect safety in production and the work-ing life of blast furnace.
Traditional material that is pressed into has common refractory mortar and phosphate mud at present, refractory mortar adds clay bonding agent with bauxitic clay fine powder and adds admixture and be prepared into, when low in this material, warm, almost there is no intensity, because be, with raw clay, make bonding agent, after high temperature, produce to shrink, occur big area crackle, through the hot blast of High Temperature High Pressure, repeatedly wash away, occur very soon powder of detached, device housings occurs that secondary temperature elevation is rubescent.Phosphate mud is to using phosphoric acid as bonding agent, the most generally with solid, powdery phosphoric acid salt, by adding water stirring, form at present, this mud oven drying at low temperature folding strength is in 1Mpa left and right, can not meet the combustion intensity of modern blast furnace ironmaking High Temperature High Pressure, and the position temperature that hot blast stove system need be in the milk is generally all at 300 ℃, phosphate mud is opened by High Temperature High Pressure wind once about week this warm area is general, cause the wind-warm syndrome blast of supplying with blast-furnace smelting to decline, the output that causes smelting iron declines greatly, has a strong impact on Business Economic Benefit and production safety.Due to several traditional existing defects of material self that are pressed in the market, after being pressed into furnace lining there is powder of detached in material soon, an expansion is entered in furnace lining gap, casing temperature occurs repeatedly rubescent, safety in production in serious threat, and the repetitious pressing-in grouting of having to even carries out large-area mending by replacing a damaged part and shutdown maintenance, wasted a large amount of man power and materials, the blowing out production suspension induced losses simultaneously causing 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, to enterprise, brought huge financial loss.
Summary of the invention
The object of the invention is to: in order to eliminate production hidden danger, keep and continue safety in production and the work-ing life of hotblast stove, adopt pressing-in grouting method to safeguard, in order to overcome current refractory mortar and phosphate mud for the deficiency of hot blast stove system grouting, when a kind of low temperature is provided, just there is very high intensity and along with the rising intensity of temperature improves constantly, compactness is good, anti-thermal shock stability and corrosion resistance strong for smelting iron the water system pressing-in grouting material of hot blast stove system.
Another object of the present invention is to: provide described for smelting iron the preparation method of water system pressing-in grouting material of hot blast stove system.
The invention provides a kind ofly for smelting iron the water system pressing-in grouting material of hot blast stove system, each component formula is by weight: alumine 72-81 part, corundum fine powder 5-10 part, α-aluminum oxide 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, carboxymethyl cellulose 0.5-1 part, tripoly phosphate sodium STPP 0.2-1 part, Sodium hexametaphosphate 99 0.2-1 part.
Alumine of the present invention is commercially available bauxite chamotte, and aluminium sesquioxide content is no less than 83%, is processed as 1 millimeter-0.5 millimeter 30%, 0.5 millimeter-0.1 millimeter 40%, 0.1 millimeter-0.076 millimeter 30% of three grades of grating; Described corundum fine powder is commercially available, and granularity is not more than 0.076 millimeter, and aluminium sesquioxide content is no less than 95%.; Described α-aluminum oxide micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Described wilkinite is commercially available wilkinite fine powder, and described kyanite is commercially available, and granularity is not more than 0.076 millimeter; Described Y
2o
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,granularity 3-5 micron, La
2o
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
,granularity 3-6 micron.Described dextrin is commercially available prod, and described silica-gel powder is commercially available prod; Described silicon ash is commercially available prod, and dioxide-containing silica is no less than 92%; Described carboxymethyl cellulose is commercially available prod, and for fibrous, described tripoly phosphate sodium STPP is premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is technical grade, and content is no less than 68%.
Of the present inventionly for smelting iron the preparation method of water system pressing-in grouting material of hot blast stove system, be: first alumine, corundum fine powder, α-aluminum oxide micro mist, raw clay or wilkinite, kyanite are mixed by formula rate, stir; By yttrium oxide and lanthanum trioxide mixture, dextrin, silica-gel powder, silicon ash, carboxymethyl cellulose tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mixture, by formula rate, mix again, stir; By the material mixing for above-mentioned twice, discharging packing warehouse-in after joining double worm mixer and stirring.
During use, according to engineering consumption, feed intake, add the tap water of siccative weight 20-26%, after stirring, can use.
Of the present invention for smelting iron the water system pressing-in grouting material of hot blast stove system, during low temperature, just there is very high intensity, and along with the rising intensity of temperature improves constantly, compactness is good, anti-thermal shock stability and corrosion resistance are strong, can bear for a long time washing away of high-temperature high-pressure air flow and can powder of detached, can be combined into integral body with mother metal, simple to operation, efficiently solve iron and steel enterprise's hot blast stove system and because of furnace lining, alter wind 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 greatly improve kiln work-ing life, easily as apply.
Embodiment
Of the present invention for smelting iron the batching explanation of water system pressing-in grouting material of hot blast stove system:
1: main material special grade bauxite adopts three grades, and corundum fine powder adds by being not more than 0.076 mm particle size, make like this material form more whole.
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 normal temperature mechanical property, sintering strength improves greatly simultaneously, the compactness of strongthener is good, void content is reduced greatly, because rare earth has high-melting-point (more than 2000 ℃), and can generate composite oxides with other metal oxide effect, improve anti-thermal shock stability and the corrosion resistance of material.
3: dextrin, carboxymethyl cellulose form 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 form.Can fall low-moisture add-on, tripoly phosphate sodium STPP can also increase the dispersiveness of material, makes material form suspension, and material has good mobility, and the grouting tube wall that can not bond under transfer pressure, can not stop up grout pipe, has good workability.
4: raw clay, bentonitic adding, can enter one and improve intermediate sintering temperature intensity.
5: added kyanite fine powder, α-aluminum oxide micro mist, has improved high temperature sintering intensity and compactness like this, expansion effect during due to kyanite fine powder sintering, has offset the burning of organic materials and some low melting points and has lost, and has improved high temperature bulk strength, do not ftracture, do not come off.
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1:
Take alumine 78kg, corundum fine powder 6 kg, α-aluminum oxide 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, carboxymethyl cellulose 0.5 kg; Tripoly phosphate sodium STPP 0.25 kg, Sodium hexametaphosphate 99 0.25 kg.First special grade bauxite, corundum fine powder, α-aluminum oxide micro mist, raw clay, wilkinite, kyanite are pressed to formula rate and mixed, stir; By yttrium oxide and lanthanum trioxide mixture, dextrin, silica-gel powder, silicon ash, carboxymethyl cellulose tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mixture, by formula rate, mix again, stir; By the material mixing for above-mentioned twice, discharging packing warehouse-in after joining double worm mixer and stirring.
During use, by the water that adds of gross weight 22%, after stirring, can use.
Add and after water 22% stirs, detect performance index and be: 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 special grade bauxite 76 kg, corundum fine powder 9 kg, α-aluminum oxide 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, carboxymethyl cellulose 0.5 kg, tripoly phosphate sodium STPP 0.25kg, Sodium hexametaphosphate 99 0.35kg, make of the present invention for smelting iron the water system pressing-in grouting material of hot blast stove system by the identical preparation method of embodiment 1.
During use, by the water that adds of gross weight 21%, stir more than 15 minutes until evenly can use.
After stirring by formula external adding water 21%, detecting performance index 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 alumine 75 kg, corundum fine powder 8 kg, α-aluminum oxide 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 of the present invention for smelting iron the water system pressing-in grouting material of hot blast stove system by the identical preparation method of embodiment 1.
During use, by the water that adds of gross weight 21%, after stirring, can use.
After stirring by formula external adding water 21%, detecting performance index 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 decline, and along with the rising of temperature constantly raises, refractoriness is high.Use by tens big-and-middle-sized iron and steel enterprises ironmaking hot blast stove systems, has all reached ideal effect, has extended kiln work-ing life, has produced good economic and social benefit.
The performance index of water system pressing-in grouting material of the present invention are as follows:
Embodiment 4:
The present embodiment is got alumine 81 kg, corundum fine powder 5 kg, α-aluminum oxide 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, carboxymethyl cellulose 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 1 millimeter-0.5 millimeter 30%, 0.5 millimeter-0.1 millimeter 40%, 0.1 millimeter-0.076 millimeter 30% of three grades of grating; Described corundum fine powder is commercially available, and granularity is not more than 0.076 millimeter, and aluminium sesquioxide content is no less than 95%.; Described α-aluminum oxide micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Described wilkinite is commercially available wilkinite fine powder, and described kyanite is commercially available, and granularity is not more than 0.076 millimeter; Described Y
2o
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,granularity 3-5 micron, La
2o
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
?, granularity 3-6 micron.Described dextrin is commercially available prod, and described silica-gel powder is commercially available prod; Described silicon ash is commercially available prod, and dioxide-containing silica is no less than 92%; Described carboxymethyl cellulose is commercially available prod, and for fibrous, described tripoly phosphate sodium STPP is premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is technical grade, and content is no less than 68%.By the identical preparation method of embodiment 1, make of the present invention for smelting iron the water system pressing-in grouting material of hot blast stove system.
During use, by the water that adds of gross weight 20%, stir more than 15 minutes until evenly can use.
Embodiment 5:
The present embodiment is got alumine 72 kg, corundum fine powder 10 kg, α-aluminum oxide 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, carboxymethyl cellulose 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 1 millimeter-0.5 millimeter 30%, 0.5 millimeter-0.1 millimeter 40%, 0.1 millimeter-0.076 millimeter 30% of three grades of grating; Described corundum fine powder is commercially available, and granularity is not more than 0.076 millimeter, and aluminium sesquioxide content is no less than 95%.; Described α-aluminum oxide micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Described wilkinite is commercially available wilkinite fine powder, and described kyanite is commercially available, and granularity is not more than 0.076 millimeter; Described Y
2o
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,granularity 3-5 micron, La
2o
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
,granularity 3-6 micron.Described dextrin is commercially available prod, and described silica-gel powder is commercially available prod; Described silicon ash is commercially available prod, and dioxide-containing silica is no less than 92%; Described carboxymethyl cellulose is commercially available prod, and for fibrous, described tripoly phosphate sodium STPP is premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is technical grade, and content is no less than 68%.By the identical preparation method of embodiment 1, make of the present invention for smelting iron the water system pressing-in grouting material of hot blast stove system.
During use, add again the water of dry substance gross weight 26%, after stirring, can use.
Embodiment 6:
The present embodiment is got alumine 80 kg, corundum fine powder 7 kg, α-aluminum oxide 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, carboxymethyl cellulose 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 1 millimeter-0.5 millimeter 30%, 0.5 millimeter-0.1 millimeter 40%, 0.1 millimeter-0.076 millimeter 30% of three grades of grating; Described corundum fine powder is commercially available, and granularity is not more than 0.076 millimeter, and aluminium sesquioxide content is no less than 95%.; Described α-aluminum oxide micro mist is that commercially available aluminium sesquioxide content is no less than 85%; Described wilkinite is commercially available wilkinite fine powder, and described kyanite is commercially available, and granularity is not more than 0.076 millimeter; Described Y
2o
3(yttrium oxide) is regular grade, and content is no less than 99.9%
,granularity 3-5 micron, La
2o
3(lanthanum trioxide) is regular grade, and content is no less than 99.5-99.9%
,granularity 3-6 micron.Described dextrin is commercially available prod, and described silica-gel powder is commercially available prod; Described silicon ash is commercially available prod, and dioxide-containing silica is no less than 92%; Described carboxymethyl cellulose is commercially available prod, and for fibrous, described tripoly phosphate sodium STPP is premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is technical grade, and content is no less than 68%.By the identical preparation method of embodiment 1, make of the present invention for smelting iron the water system pressing-in grouting material of hot blast stove system.
During use, by gross weight 25%, add water, after stirring, can use.
Claims (10)
1. one kind for smelting iron the water system pressing-in grouting material of hot blast stove system, it is characterized in that: each component proportioning is by weight: alumine 72-81 part, corundum fine powder 5-10 part, α-aluminum oxide micro mist 3-6 part, raw clay 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, carboxymethyl cellulose 0.5-1 part, tripoly phosphate sodium STPP 0.2-1 part, Sodium hexametaphosphate 99 0.2-1 part.
2. water system pressing-in grouting material according to claim 1, it is characterized in that: alumine is bauxite chamotte, and wherein aluminium sesquioxide content is no less than 83%, is 1 millimeter-0.5 millimeter 30% of three grades of grating, 0.5 millimeter-0.1 millimeter 40%, 0.1 millimeter-0.076 millimeter 30%.
3. water system pressing-in grouting material according to claim 1, is characterized in that: corundum fine powder granularity is not more than 0.076 millimeter, and aluminium sesquioxide content is no less than 95%.
4. water system pressing-in grouting material according to claim 1, is characterized in that: α-aluminum oxide micro mist granularity is not more than 5 microns, and aluminium sesquioxide content is no less than 85%.
5. water system pressing-in grouting material according to claim 1, is characterized in that: kyanite granularity is not more than 0.076 millimeter, and aluminium sesquioxide content is no less than 50%.
6. water system pressing-in grouting material according to claim 1, is characterized in that: yttrium oxide is regular grade, and content is no less than 99.9% granularity 3-5 micron; Lanthanum trioxide is regular grade, content 99.5-99.9%, granularity 4-6 micron.
7. water system pressing-in grouting material according to claim 1, is characterized in that: tripoly phosphate sodium STPP is premium grads, and content is no less than 96%; Sodium hexametaphosphate 99 is technical grade, and content is no less than 68%.
8. water system pressing-in grouting material according to claim 1, is characterized in that: silicon ash is no less than 92% for dioxide-containing silica.
9. according to water system pressing-in grouting material described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, it is characterized in that: preparation method is: first alumine, corundum fine powder, α-aluminum oxide micro mist, raw clay, kyanite are mixed by formula rate, stir; By yttrium oxide and lanthanum trioxide mixture, dextrin, silica-gel powder, silicon ash, carboxymethyl cellulose, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mixture, by formula rate, mix again, stir; By the material mixing for above-mentioned twice, discharging packing warehouse-in after joining double worm mixer and stirring.
10. according to water system pressing-in grouting material described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, it is characterized in that: during use, add again the water of dry substance weight 20-26%, stir.
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| CN103693974B (en) * | 2013-12-02 | 2015-01-07 | 武汉钢铁(集团)公司 | Lightweight heat-insulating fire brick and preparation method thereof |
| CN104058756B (en) * | 2014-06-16 | 2016-07-27 | 北京首钢股份有限公司 | A kind of hot maintenance pump pressure of hot blast stove system send buffering filler |
| CN104591754B (en) * | 2014-12-29 | 2017-05-24 | 安徽马钢耐火材料有限公司 | High aluminum mortar and preparation method thereof |
| CN104944978B (en) * | 2015-05-29 | 2017-03-22 | 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 |
| CN115448685B (en) * | 2022-08-29 | 2023-05-30 | 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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