CN102775168B - Preparation method of blast furnace tapping channel - Google Patents
Preparation method of blast furnace tapping channel Download PDFInfo
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- CN102775168B CN102775168B CN201210266861.5A CN201210266861A CN102775168B CN 102775168 B CN102775168 B CN 102775168B CN 201210266861 A CN201210266861 A CN 201210266861A CN 102775168 B CN102775168 B CN 102775168B
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Abstract
The invention relates to a preparation method of a blast furnace tapping channel and belongs to the field of refractory castables. The preparation method of the blast furnace tapping channel comprises the following steps of: weighing the following raw materials in parts by weight: 40-50 parts of alumina, 15-30 parts of sintered tabular corundum, 10-15 parts of andalusite, 1-8 parts of alumina hollow ball, 3-10 parts of electric smelting zirconia, 10-25 parts of alumina micro powder, 8-12 parts of ferro silicon nitride, 3-10 parts of alumina micro powder, 4-8 parts of alumina and silica sol composite suspension, 1-2 parts of nano ceramic powder, 0.1-0.3 part of mixture of sodium tripolyphosphate and sodium hexametaphosphate and 0.3-0.4 part of explosion-proof fiber; then vibrating for 3-5 minutes in a vibration device; and installing a mould in a tapping channel through which molten iron flows, adding vibrated ingredients into the mould, adding liquid sodium silicate with a weight of 3-8 percent of total quantity of a castable, agitating for 10-15 minutes, naturally curing for 1-2 hours and demoulding to obtain the blast furnace tapping channel. The blast furnace tapping channel with long service life and the low melting loss rate can be prepared by the preparation method.
Description
Technical field
The present invention relates to a kind of preparation method of blast furnace iron outlet groove, belong to refractory castable field.
Background technology
Blast furnace iron outlet groove is the passage that high temperature liquid iron and slag are flowed through.Existing casting house mould material is common Al
2o
3-SiC-C matter mould material, but general common Al
2o
3-SiC-C matter casting house mould material is at 2500m
3on blast furnace, use, disposable iron influx is at 170,000 tons.Along with strengthening smelting, the demand that improves output becomes increasingly conspicuous, and casting house requires the requirement of disposable iron influx also more and more stricter, and iron influx is not ideal enough.
CN100519483 (2009-7-29) discloses a kind of casting house material and preparation method thereof, and casting house material is stirred and makes after magnetic separation by raw materials such as brown corundum, white fused alumina, silicon carbide, pitch, lapis amiridis, Pure Silicon Metals.Casting house material of the present invention adds after the liquid phenolic resin mixing of 10-15% of its total amount, and cast is made.But melting loss speed and the work-ing life of this casting house still have much room for improvement.
CN102101782 (2011-6-22) discloses a kind of casting house mould material, and described mould material is by alumina, brown corundum, SiC, modified Nano carbon dust, Si0
2micro mist, aluminous cement, α-A1
2o
3micro mist, explosion-proof fiber, metallic silicon power, tripoly phosphate sodium STPP, Al (OH)
3and Mg (OH)
2complex sol suspension composition.
But this mould material take brown corundum as host grain, melting loss speed is larger, and wearing quality is low, and iron runner repairing work frequency is increased substantially, and brings larger hidden danger to again the safety in production of blast furnace casting, is not suitable with on the casting house of big-and-middle-sized blast furnace and uses.
Summary of the invention
The object of this invention is to provide the preparation method of a kind of long service life, a kind of blast furnace iron outlet groove that melting loss speed is low.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A preparation method for blast furnace iron outlet groove, comprises step:
A. batching: weigh by weight alumina 40-50, sintering plate corundum 15-30, andaluzite 10-15, alumina hollow ball 1-8, electric-melting zirconia 3-10, alumina powder 10-25, ferro-silicon nitride 8-12, alumina powder 3-10, aluminum oxide and the mixture 0.1-0.3 of silicon dioxide gel composite suspension liquid 4-8, nano-ceramic powder 1-2, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3-0.4, then at vibrating device internal vibration 3-5min;
B. construction: installation mold in the casting house of flowing through at molten iron, in mould, add the batching after vibration, then add liquid sodium silicate, the mould material total amount that the weight of described liquid sodium silicate is 3-8%, stir after 10-15min, after natural curing 1-2h, the demoulding obtains blast furnace iron outlet groove.
Preparation method's of the present invention advantage is:
(1) exempt from baking, prepare iron storage type casting house, formula mould material is combined construction during with liquid sodium silicate, tamp through vibration, after construction, can come into operation immediately, use at large blast furnace casting house, continuous tapping is without repairing, iron influx reaches 160000 tons, and high life, melting loss speed are low;
(2) aluminum oxide and silicon dioxide gel composite suspension liquid are made nano-grade ceramic binding agent, directly join and adopt alumina and plate diamond spar to be mixed in the host grain of casting house mould material, pass through in-situ synthesized reaction, form mullite nano structural matrix, make the casting house mould material of the compound oxidate ceramic combination of this product, make that mould material high volume stability is strong, thermal shock resistance is high, longer service life;
(3) utilize the synergistic function of ferro-silicon nitride, explosion-proof fiber and micron order hollow ball and colloidal sol composite suspension liquid and the oxidation-resistance of ferro-silicon nitride decomposition reaction reinforcement mould material at high temperature simultaneously, both improved the yield point value of mould material, reduce again the usage quantity of colloidal sol, also improved the thermal shock resistance of mould material; The synergistic function of the zirconium dioxide in mixture and the electric-melting zirconia of retardant tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 reduces the volume density of product simultaneously, thermal conductivity reduces, the iron runner castable of being combined with cement is compared, colloidal sol is purer in conjunction with iron runner castable, water content is few, so in applied at elevated temperature process, anti-physics, chemical erosion ability are stronger, melting loss speed is low.
As preferably, described steps A is: weigh by weight alumina 42-45, plate diamond spar 20-25, andaluzite 10-15, alumina hollow ball 2-5, electric-melting zirconia 5-8, alumina powder 15-20, ferro-silicon nitride 8-12, alumina powder 3-10, aluminum oxide and silicon dioxide gel composite suspension liquid 4-8, nano-ceramic powder 1-2, the mixture 0.1-0.3 of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3-0.4, then at vibrating device internal vibration 3-5min.
As preferably, described step B is: installation mold in the main iron hook of flowing through at molten iron adds the batching after vibration in mould, add again liquid sodium silicate, the weight of described liquid sodium silicate is the mould material total amount of 4-6%, stirs after 12min, and after natural curing 1-2h, the demoulding obtains main trough of blast furnace.
As preferably, the quality index of described alumina is: Al
2o
3>=95%.
As preferably, the quality index of described sintering plate corundum is: Al
2o
3>=99%.
As preferably, the quality index of described alumina powder is: Al
2o
3>=99%.
As preferably, the quality index of described andaluzite is: Al
2o
372-78%, SiO
211-17%.
As preferably, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by 7:3 weight ratio.
As preferably, described aluminum oxide and silicon dioxide gel mix composite suspension liquid by 1:1 weight ratio.
As preferably, explosion-proof fiber is polyurethanes fiber.
As preferably, the particle diameter of described nano-ceramic powder is 20～40nm.
A kind of Refractory Castables for BF Troughs and Runners, it comprises the component of following parts by weight:
Alumina 40-50, sintering plate corundum 15-30, andaluzite 10-15, alumina hollow ball 1-8, electric-melting zirconia 3-10, alumina powder 10-25, ferro-silicon nitride 8-12, alumina powder 3-10, aluminum oxide and silicon dioxide gel composite suspension liquid 4-8, nano-ceramic powder 1-2, the mixture 0.1-0.3 of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3-0.4.
Embodiment
The formula 1 of Refractory Castables for BF Troughs and Runners, comprises the component of following parts by weight: alumina 40, sintering plate corundum 15, andaluzite 10, alumina hollow ball 1, electric-melting zirconia 3, alumina powder 10, ferro-silicon nitride 8, alumina powder 3, aluminum oxide and silicon dioxide gel composite suspension liquid 4, nano-ceramic powder 1, the mixture 0.1 of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3.
The formula 2 of Refractory Castables for BF Troughs and Runners, comprises the component of following parts by weight: alumina 50, sintering plate corundum 30, andaluzite 15, alumina hollow ball 8, electric-melting zirconia 10, alumina powder 25, ferro-silicon nitride 12, alumina powder 10, aluminum oxide and silicon dioxide gel composite suspension liquid 8, nano-ceramic powder 2, the mixture 0.3 of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.4.
The formula 3 of Refractory Castables for BF Troughs and Runners, comprises the component of following parts by weight: alumina 42, plate diamond spar 20, andaluzite 12, alumina hollow ball 2, electric-melting zirconia 5, alumina powder 15, ferro-silicon nitride 8, alumina powder 3, aluminum oxide and silicon dioxide gel composite suspension liquid 4, nano-ceramic powder 1, the mixture 0.1-0.3 of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3-0.4;
Wherein the quality index of alumina is: Al
2o
3>=95%;
The quality index of sintering plate corundum is: Al
2o
3>=99%;
The quality index of alumina powder is: Al
2o
3>=99%;
The quality index of andaluzite is: Al
2o
372-78%, SiO
211-17%;
Tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by 7:3 weight ratio;
Aluminum oxide and silicon dioxide gel mix composite suspension liquid by 1:1 weight ratio;
Explosion-proof fiber is polyurethanes fiber;
The particle diameter of nano-ceramic powder is 25～35nm.
The formula 4 of Refractory Castables for BF Troughs and Runners, comprises the component of following parts by weight: alumina 45, plate diamond spar 25, andaluzite 14, alumina hollow ball 5, electric-melting zirconia 8, alumina powder 20, ferro-silicon nitride 12, alumina powder 10, aluminum oxide and silicon dioxide gel composite suspension liquid 6, nano-ceramic powder 2, the mixture 0.1-0.3 of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3-0.4;
Wherein the quality index of alumina is: Al
2o
3>=95%;
The quality index of sintering plate corundum is: Al
2o
3>=99%;
The quality index of alumina powder is: Al
2o
3>=99%;
The quality index of andaluzite is: Al
2o
374-76%, SiO
214-16%;
Tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by 7:3 weight ratio;
Aluminum oxide and silicon dioxide gel mix composite suspension liquid by 1:1 weight ratio;
Explosion-proof fiber is polyurethanes fiber;
The particle diameter of nano-ceramic powder is 20～40nm.
Embodiment mono-
Use formula 1 to prepare blast furnace iron outlet groove: by after formula 1 batching at vibrating device internal vibration 3min, installation mold in the casting house of flowing through at molten iron, in mould, add the batching after vibration, add again liquid sodium silicate, the weight of liquid sodium silicate is 3% mould material total amount, stir after 10min, after natural curing 1h, the demoulding obtains blast furnace iron outlet groove.
Embodiment bis-
Use formula 2 to prepare blast furnace iron outlet groove: by after formula 2 batchings at vibrating device internal vibration 5min, installation mold in the casting house of flowing through at molten iron, in mould, add the batching after vibration, add again liquid sodium silicate, the weight of liquid sodium silicate is 8% mould material total amount, stir after 15min, after natural curing 2h, the demoulding obtains blast furnace iron outlet groove.
Embodiment tri-
Use formula 3 to prepare blast furnace iron outlet groove: by after formula 3 batchings at vibrating device internal vibration 4min, installation mold in the casting house of flowing through at molten iron, in mould, add the batching after vibration, add again liquid sodium silicate, the weight of liquid sodium silicate is 5% mould material total amount, stir after 12min, after natural curing 1.5h, the demoulding obtains blast furnace iron outlet groove.
Embodiment tetra-
Use formula 4 to prepare blast furnace iron outlet groove: by after formula 4 batchings at vibrating device internal vibration 4min, installation mold in the casting house of flowing through at molten iron, in mould, add the batching after vibration, add again liquid sodium silicate, the weight of liquid sodium silicate is the mould material total amount of 4-6%, stir after 13min, after natural curing 1.2h, the demoulding obtains blast furnace iron outlet groove.
Comparative example one
In mould material, the white proportion by subtraction of the weight of each component is alumina 8%; Palm fibre corundum 54%; SiC1 2%; Modified Nano carbon dust 4%; Fine silica powder 5%; Aluminous cement 3%; α-Al
2o
3micro mist 7%; Explosion-proof fiber 0.03%; Metallic silicon power 1.47%; Trimeric cyanamide 0.3%; Aluminium hydroxide and magnesium hydroxide complex sol suspension 5.2%.
Comparative example two
In mould material, the white proportion by subtraction of the weight of each component is alumina 10%; Palm fibre corundum 58%; SiC 10%; Modified Nano carbon dust 3%; Fine silica powder 3%; Aluminous cement 2%; α-Al
2o
3micro mist 7%; Explosion-proof fiber 0.03%; Metallic silicon power 0.95%; Trimeric cyanamide 0.5%; Aluminium hydroxide and magnesium hydroxide complex sol suspension 5.5%.
Table 1 embodiment and comparative example's product performance comparison
From form, can find out,
(1) compressive strength of the present invention and High anti bending strength, heating permanent line velocity of variation is little, therefore the long service life of product, melting loss speed low, antioxidant property is strong, the product effect that wherein adopts optimal way of the present invention to obtain is best, sees embodiment 3;
(2) volume density of the present invention is larger, has had good volume stability.Make that mould material high volume stability is strong, thermal shock resistance is high, longer service life.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art are reading after this specification sheets and can make to the present embodiment the modification that there is no creative contribution as required, but as long as within the scope of claim of the present invention, are all subject to the protection of patent law.
Claims (10)
1. a preparation method for blast furnace iron outlet groove, is characterized in that: comprise step:
A. batching: weigh by weight alumina 40-50, sintering plate corundum 15-30, andaluzite 10-15, alumina hollow ball 1-8, electric-melting zirconia 3-10, alumina powder 10-25, ferro-silicon nitride 8-12, alumina powder 3-10, aluminum oxide and the mixture 0.1-0.3 of silicon dioxide gel composite suspension liquid 4-8, nano-ceramic powder 1-2, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3-0.4, then at vibrating device internal vibration 3-5min;
B. construction: installation mold in the casting house of flowing through at molten iron, in mould, add the batching after vibration, then add liquid sodium silicate, the mould material total amount that the weight of described liquid sodium silicate is 3-8%, stir after 10-15min, after natural curing 1-2h, the demoulding obtains blast furnace iron outlet groove.
2. the preparation method of a kind of blast furnace iron outlet groove according to claim 1, it is characterized in that: described steps A is: weigh by weight alumina 42-45, plate diamond spar 20-25, andaluzite 10-15, alumina hollow ball 2-5, electric-melting zirconia 5-8, alumina powder 15-20, ferro-silicon nitride 8-12, alumina powder 3-10, aluminum oxide and silicon dioxide gel composite suspension liquid 4-8, nano-ceramic powder 1-2, the mixture 0.1-0.3 of tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, explosion-proof fiber 0.3-0.4, then at vibrating device internal vibration 3-5min;
Described step B is: that flows through at molten iron goes out installation mold in cleek, in mould, add the batching after vibration, then add liquid sodium silicate, the mould material total amount that the weight of described liquid sodium silicate is 4-6%, stir after 12min, after natural curing 1-2h, the demoulding obtains blast furnace casting hook.
3. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: the quality index of described alumina is: Al
2o
3>=95%.
4. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: the quality index of described sintering plate corundum is: Al
2o
3>=99%.
5. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: the quality index of described alumina powder is: Al
2o
3>=99%.
6. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: the quality index of described andaluzite is: Al
2o
372-78%, SiO
211-17%.
7. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by 7:3 weight ratio.
8. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: described aluminum oxide and silicon dioxide gel mix composite suspension liquid by 1:1 weight ratio.
9. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: described explosion-proof fiber is polyurethanes fiber.
10. the preparation method of a kind of blast furnace iron outlet groove according to claim 1 and 2, is characterized in that: the particle diameter of described nano-ceramic powder is 20～40nm.
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| CN104355645B (en) * | 2014-12-01 | 2017-10-31 | 黄伟达 | A kind of Special pouring material for coal injection pipe |
| CN107235713A (en) * | 2017-06-30 | 2017-10-10 | 长兴泓矿炉料有限公司 | A kind of cleek castable and preparation method thereof |
| CN111675545A (en) * | 2020-06-10 | 2020-09-18 | 天津炜润达新材料科技有限公司 | Blast furnace tapping channel castable |
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| US4230652A (en) * | 1978-10-20 | 1980-10-28 | Kaiser Aluminum & Chemical Corporation | Method of repairing a refractory structure |
| CN101045636A (en) * | 2007-05-08 | 2007-10-03 | 上海柯瑞冶金炉料有限公司 | Alumina base andalusite-SiC-C brick, manufacturing method and its application |
| CN101654370A (en) * | 2009-09-18 | 2010-02-24 | 中国地质大学（北京） | Aluminiferous casting material for blast furnace tapping and preparation method thereof |
| CN101811879A (en) * | 2009-02-24 | 2010-08-25 | 宝山钢铁股份有限公司 | Al2O3-SiO2-SiC-based jet material for foundry ladle |
| CN102101784A (en) * | 2011-02-22 | 2011-06-22 | 佘成其 | Lightweight reformed main iron runner pouring material |
-
2012
- 2012-07-30 CN CN201210266861.5A patent/CN102775168B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4230652A (en) * | 1978-10-20 | 1980-10-28 | Kaiser Aluminum & Chemical Corporation | Method of repairing a refractory structure |
| EP0010345B1 (en) * | 1978-10-20 | 1982-03-03 | KAISER ALUMINUM & CHEMICAL CORPORATION | Method of repairing a refractory structure |
| CN101045636A (en) * | 2007-05-08 | 2007-10-03 | 上海柯瑞冶金炉料有限公司 | Alumina base andalusite-SiC-C brick, manufacturing method and its application |
| CN101811879A (en) * | 2009-02-24 | 2010-08-25 | 宝山钢铁股份有限公司 | Al2O3-SiO2-SiC-based jet material for foundry ladle |
| CN101654370A (en) * | 2009-09-18 | 2010-02-24 | 中国地质大学（北京） | Aluminiferous casting material for blast furnace tapping and preparation method thereof |
| CN102101784A (en) * | 2011-02-22 | 2011-06-22 | 佘成其 | Lightweight reformed main iron runner pouring material |
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Address after: 313100 new industrial park, pheasant City, Huzhou, Zhejiang, Changxing County Patentee after: Zhejiang Jincheng new material Limited by Share Ltd Address before: 313100 Changxing County Jincheng Industrial Zone, Zhejiang, Huzhou, Zhejiang Province Jincheng refractory material Co., Ltd. Patentee before: Zhejiang Jincheng Refractories Co., Ltd. |