CN103896607B - The alkaline anhydrous stemming of ore-smelting furnace - Google Patents
The alkaline anhydrous stemming of ore-smelting furnace Download PDFInfo
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- CN103896607B CN103896607B CN201410074594.0A CN201410074594A CN103896607B CN 103896607 B CN103896607 B CN 103896607B CN 201410074594 A CN201410074594 A CN 201410074594A CN 103896607 B CN103896607 B CN 103896607B
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Abstract
The invention discloses the alkaline anhydrous stemming of a kind of ore-smelting furnace, it is by raw material electrosmelted magnesite clinker: granularity 16 order ~ 200 order, 33 ~ 49 parts; Graphite is considered to be worth doing: granularity < 3mm, 13 ~ 16 parts; Asphalt powder: granularity≤1mm, 4 ~ 6 parts; Spinel: granularity 200 order, 9 ~ 16 parts; Rare earth oxide: 1 ~ 6 part; Mierocrystalline cellulose 0.6 part; 0.4 part, dextrin; Compounded oil: 10 ~ 13 parts formulated.The invention has the advantages that the basic refractory adopted based on magnesian, graphite bits and asphalt powder add the carbon content of stemming finished product, make product resist slag ability of invading to improve, easy opening after simultaneously graphite bits also can make product sinter in iron mouth, asphalt powder can make the smooth easily crowded mud of product; Spinel and chromium sand add the sintered material hardness that can improve product, the erosion wear resistance of improving product; Rare earth oxide add the sintering that can promote product; Mierocrystalline cellulose, dextrin, compounded oil are the bonding agent of product, make product possess the requirement of stickiness and plasticity.
Description
Technical field
The present invention relates to refractory materials, especially relate to the alkaline anhydrous stemming of a kind of ore-smelting furnace.
Background technology
Blast furnace can use stemming when processing iron mouth, because the refractory materials at blast furnace iron notch place is generally made up of carbon brick+corundum ceramic cup brick or pure carbon brick etc., so all adopt Al_2O_3-C based anhydrous stemming process iron mouth.Along with becoming more meticulous further and the power consumption control overflow of energy-saving and emission-reduction of smelting technology, adopt the steel alloys such as the ferronickel of blast-furnace smelting, silicomanganese to change ore-smelting furnace gradually into before and smelt.When adopting ore-smelting furnace alloy smelting steel, many producers still adopt the Al_2O_3-C based anhydrous stemming process iron mouth on blast furnace.The liner of ore-smelting furnace is generally built by laying bricks or stones by magnesia or magnesia carbon refractory, iron notch is also magnesia or magnesium carbonaceous basic refractory accordingly, because the material of Al_2O_3-C based anhydrous stemming is not identical with the main material at ore-smelting furnace iron notch place, not merging of storeroom can be produced and even occur rejection, cause in production process, having occurred many problems: as stemming press-in difficulty or compression distance inadequate, occur between the refractory brick at iron notch place and stemming oozing iron phenomenon, serious even occurs that stemming skids off serious accidents such as causing the large stream of race.
Summary of the invention
The object of the present invention is to provide a kind of alkaline anhydrous stemming of ore-smelting furnace that can adapt to the resistance to material of ore-smelting furnace lining body.
For achieving the above object, the present invention can take following technical proposals:
The alkaline anhydrous stemming of ore-smelting furnace of the present invention, it is formulated by following weight by raw material electrosmelted magnesite clinker, graphite bits, asphalt powder, spinel, rare earth oxide, Mierocrystalline cellulose, dextrin and compounded oil:
Electrosmelted magnesite clinker: granularity 16 order ~ 200 order, 33 ~ 49 parts;
Graphite is considered to be worth doing: granularity < 3mm, 13 ~ 16 parts;
Asphalt powder: granularity≤1mm, 4 ~ 6 parts;
Spinel: granularity 200 order, 9 ~ 16 parts;
Rare earth oxide: 1 ~ 6 part;
Mierocrystalline cellulose 0.6 part;
0.4 part, dextrin;
The compounded oil of resin and tar composition: 10 ~ 13 parts.
For meeting the use of middle-size and small-size ore-smelting furnace, in described raw material, also comprise 4 ~ 11 parts, the one-level magnesia of granularity 1 ~ 3mm.
For meeting the use of big-and-middle-sized ore-smelting furnace, in described raw material, also comprise the electrosmelted magnesite clinker 4 ~ 11 parts of granularity 1 ~ 3mm; 1 ~ 7 part, the chromium sand of granularity < 1mm.
Described granularity 16 order ~ 200 order, in the electrosmelted magnesite clinker of 33 ~ 49 parts, granularity 200 object electrofusion magnesia powder is 18 ~ 25 parts.
Described rare earth oxide is Y2O
3+ La
2o
3+ Nd
2o
3.
Described compounded oil is mixed by resin and tar, and the ratio of the two is resin: tar=20% ~ 35%:65% ~ 80%.
When ore-smelting furnace of the present invention is produced with alkaline anhydrous stemming, the mixing pan possessing heating function is adopted to mix, first mixing pan cleaned out and be heated to design temperature (>=45 DEG C), then dried raw material is added successively in order: the particulate material first adding more than granularity 1mm is dry mixed 2 minutes, add dextrin again, the particulate material of Mierocrystalline cellulose and about 1mm is dry mixed 3 minutes, then the compounded oil of 1/2 is added, wet stone roller is after 10 minutes, all for residue powders are added, rewetting grinds 5 minutes, finally remaining 1/2 compounded oil is added wet stone roller 10 minutes of rear continuation and become pug, mud extruder is sent into through handling equipment from mixing pan pug out, extrude the mud post meeting volume density and require, mud post cuts off by specification, anhydrous stemming finished product can be obtained, packaging is put in storage.
The physical and chemical index of alkaline anhydrous stemming finished product of the present invention is as follows:
| Project Item | |
| MgO, % | ≥35 |
| Cr 2O 3 % | ≥2 |
| C, % | ≥11 |
| Volume density BD, g/cm 3 | ≥1.7 |
| Compressive strength CS, 1450 DEG C × 3h, MPa | ≥12 |
| Folding strength CMOR, 1450 DEG C × 3h, MPa | ≥2 |
| Application | Large, medium and small ore-smelting furnace |
The invention has the advantages that the basic refractory adopted based on magnesian, reach an agreement with the material of ore-smelting furnace liner, more affine with iron mouth place refractory brick, graphite bits and asphalt powder add the carbon content of stemming finished product, make product resist slag ability of invading to improve, easy opening after simultaneously graphite bits can also make product sinter in iron mouth, asphalt powder can make the smooth easily crowded mud of product; Spinel and chromium sand add the sintered material hardness that can improve product, the erosion wear resistance of improving product; Rare earth oxide add the sintering that can promote product; Mierocrystalline cellulose, dextrin, compounded oil are the bonding agent of product, make product possess the requirement of stickiness and plasticity.
Embodiment
embodiment 1
The alkaline anhydrous stemming of RPNM-35 type ore-smelting furnace is by raw material one-level magnesia, electrosmelted magnesite clinker, graphite bits, asphalt powder, spinel, Y2O
3+ La
2o
3+ Nd
2o
3, Mierocrystalline cellulose, dextrin and compounded oil (resin 20% ~ 35%, tar 65% ~ 80%) formulated according to following weight per-cent:
The one-level magnesia 8 ~ 11% of granularity 1 ~ 3mm,
200 order < granularity≤16 object electrosmelted magnesite clinker 42 ~ 49%(wherein 200 object electrofusion magnesia powders account for 21 ~ 25%),
The graphite bits 14 ~ 16% of granularity < 3mm,
The asphalt powder 4 ~ 6% of granularity≤1mm,
200 object spinel powders 9 ~ 11%,
Y2O
3+La
2O
3+Nd
2O
3 1~4%，
Mierocrystalline cellulose 0.6%,
Dextrin 0.4%,
Compounded oil 11 ~ 13%.
First the mixing pan of LNX-1600 type cleaned out and be heated to design temperature (>=45 DEG C), first add one-level magnesia, graphite bits particulate material is dry mixed 2 minutes, add dextrin again, Mierocrystalline cellulose and electrosmelted magnesite clinker particulate material, thinner graphite bits particulate material is dry mixed 3 minutes, then the compounded oil of 1/2 is added, wet stone roller is after 10 minutes, remaining all powders are added, remaining 1/2 compounded oil added after 5 minutes by wet stone roller, wet stone roller makes it become pug in 10 minutes, pug is delivered in RJN-21 mud extruder, be extruded into the mud post of diameter 160mm ~ 220mm, be cut into the anhydrous stemming finished product of length 250 mm ~ 320 mm again, packaging is put in storage.
After tested, the technical parameter of finished product stemming is as follows:
MgO>=35%; C>=12%; Volume density BD>=1.7 g/cm
3; Compressive strength CS(1450 DEG C × 3h)>=12MPa; Folding strength CMOR(1450 DEG C × 3h)>=2 MPa.
On ore-smelting furnace, proof is tested: this alkaline anhydrous stemming meets the service requirements of ore-smelting furnace iron notch completely through smeltery.Because this anhydrous stemming is easily clamp-oned, hobbing depth can reach 1300mm; Easy opening, tapping duration there will not be reaming phenomenon in 120 minutes.
embodiment 2:
The alkaline anhydrous stemming of RPNM-38 type ore-smelting furnace is by raw material one-level magnesia, electrosmelted magnesite clinker, graphite bits, asphalt powder, spinel, chromium sand, Y2O
3+ La
2o
3+ Nd
2o
3, Mierocrystalline cellulose, dextrin, compounded oil (resin 28% ~ 35%, tar 65% ~ 80%) be formulated according to following weight per-cent:
The one-level magnesia 4 ~ 5% of granularity 1 ~ 3mm,
The electrosmelted magnesite clinker 4 ~ 6% of granularity 1 ~ 3mm,
200 order < granularity≤16 object electrosmelted magnesite clinker 42 ~ 49%(wherein 200 object electrofusion magnesia powders account for 21 ~ 25%),
The graphite bits 13 ~ 15% of granularity < 3mm,
The asphalt powder 4 ~ 6% of granularity≤1mm,
200 object spinel powders 12 ~ 14%,
The chromium sand 1 ~ 4% of granularity < 1mm,
Y2O
3+La
2O
3+Nd
2O
3 2~5%，
Mierocrystalline cellulose 0.6%,
Dextrin 0.4%,
Resin and tar compounded oil 11 ~ 13%.
First LNX-1600 type mixing pan cleaned out and be heated to design temperature (>=45 DEG C), first add one-level magnesia, electrosmelted magnesite clinker particulate material, graphite bits particulate material is dry mixed 2 minutes, add dextrin again, Mierocrystalline cellulose and the thinner particulate material of electrosmelted magnesite clinker, thinner graphite bits particulate material, thicker chromium sand particulate material is dry mixed 3 minutes, then the compounded oil of 1/2 is added, wet stone roller is after 10 minutes, remaining all powders are added, remaining 1/2 compounded oil added after 5 minutes by wet stone roller, wet stone roller makes it become pug in 10 minutes, pug is delivered in RJN-21 mud extruder, be extruded into the mud post of diameter 180mm ~ 240mm, and then be cut into the anhydrous stemming finished product of length 280mm ~ 360m, packaging is put in storage.
After tested, the technical parameter of finished product stemming is as follows:
MgO>=38%; Cr
2o
3>=2%; C>=12%; Volume density BD>=1.75 g/cm
3; Compressive strength CS(1450 DEG C × 3h)>=15MPa; Folding strength CMOR(1450 DEG C × 3h)>=2.5 MPa.
On ore-smelting furnace, proof is tested: this alkaline anhydrous stemming meets the service requirements of ore-smelting furnace iron notch completely through smeltery.Because this anhydrous stemming is easily clamp-oned, hobbing depth can reach 1300mm; Easy opening, tapping duration there will not be reaming phenomenon in 120 minutes.
embodiment 3:
The alkaline anhydrous stemming of RPNM-42 type ore-smelting furnace is by raw material electrosmelted magnesite clinker, graphite bits, asphalt powder, spinel, chromium sand, Y2O
3+ La
2o
3+ Nd
2o
3, Mierocrystalline cellulose, dextrin, compounded oil (resin 28% ~ 35%, tar 65% ~ 80%) be formulated according to following weight per-cent:
The electrosmelted magnesite clinker 8 ~ 11% of granularity 1 ~ 3mm,
200 order < granularity≤16 object electrosmelted magnesite clinker 33 ~ 38%(wherein 200 object electrofusion magnesia powders account for 18 ~ 20%);
The graphite bits 13 ~ 15% of granularity < 3mm;
The asphalt powder 4% of granularity≤1mm,
200 object spinel powders 13 ~ 16%,
The chromium sand 5 ~ 7% of granularity < 1mm;
Y2O
3+La
2O
3+Nd
2O
3 3~6%，
Mierocrystalline cellulose 0.6%,
Dextrin 0.4%,
Resin and tar compounded oil 10 ~ 13%.
First LNX-1600 type mixing pan cleaned out and be heated to design temperature (>=45 DEG C), first add one-level magnesia, electrosmelted magnesite clinker particulate material, graphite bits particulate material is dry mixed 2 minutes, add dextrin again, Mierocrystalline cellulose and the thinner particulate material of electrosmelted magnesite clinker, thinner graphite bits particulate material, thicker chromium sand particulate material is dry mixed 3 minutes, then the compounded oil of 1/2 is added, wet stone roller is after 10 minutes, remaining all powders are added, remaining 1/2 compounded oil added after 5 minutes by wet stone roller, wet stone roller makes it become pug in 10 minutes, pug is delivered in RJN-21 mud extruder, be extruded into the mud post of diameter 200mm ~ 260mm, and then be cut into the anhydrous stemming finished product of length 320mm ~ 450mm, packaging is put in storage.
After tested, the technical parameter of finished product stemming is as follows:
MgO>=42%; Cr
2o
3>=4%; C>=11%; Volume density BD>=1.8 g/cm
3; Compressive strength CS(1450 DEG C × 3h)>=18MPa; Folding strength CMOR(1450 DEG C × 3h)>=2.8 MPa.
On ore-smelting furnace, proof is tested: this alkaline anhydrous stemming meets the service requirements of ore-smelting furnace iron notch completely through smeltery.Because this anhydrous stemming is easily clamp-oned, hobbing depth can reach 1300mm; Easy opening, tapping duration there will not be reaming phenomenon in 120 minutes.
Claims (6)
1. the alkaline anhydrous stemming of ore-smelting furnace, is characterized in that: it is formulated by following weight by raw material electrosmelted magnesite clinker, graphite bits, asphalt powder, spinel, rare earth oxide, Mierocrystalline cellulose, dextrin and compounded oil:
Electrosmelted magnesite clinker: granularity 16 order ~ 200 order, 33 ~ 49 parts;
Graphite is considered to be worth doing: granularity < 3mm, 13 ~ 16 parts;
Asphalt powder: granularity≤1mm, 4 ~ 6 parts;
Spinel: granularity 200 order, 9 ~ 16 parts;
Rare earth oxide: 1 ~ 6 part;
Mierocrystalline cellulose 0.6 part;
0.4 part, dextrin;
The compounded oil of resin and tar composition: 10 ~ 13 parts.
2. the alkaline anhydrous stemming of ore-smelting furnace according to claim 1, is characterized in that: 4 ~ 11 parts, the one-level magnesia also comprising granularity 1 ~ 3mm in described raw material.
3. the alkaline anhydrous stemming of ore-smelting furnace according to claim 1, is characterized in that: the electrosmelted magnesite clinker 4 ~ 11 parts also comprising granularity 1 ~ 3mm in described raw material; 1 ~ 7 part, the chromium sand of granularity < 1mm.
4. the alkaline anhydrous stemming of ore-smelting furnace according to claim 1, is characterized in that: described granularity 16 order ~ 200 order, and in the electrosmelted magnesite clinker of 33 ~ 49 parts, granularity 200 object electrofusion magnesia powder is 18 ~ 25 parts.
5. the alkaline anhydrous stemming of ore-smelting furnace according to claim 1, is characterized in that: described rare earth oxide is Y2O
3+ La
2o
3+ Nd
2o
3.
6. the alkaline anhydrous stemming of ore-smelting furnace according to claim 1, is characterized in that: described compounded oil is mixed by resin and tar, and the ratio of the two is resin: tar=20% ~ 35%:65% ~ 80%.
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| CN105819877A (en) * | 2014-07-16 | 2016-08-03 | 山国强 | Novel environment-friendly blast furnace stemming |
| CN105732058B (en) * | 2016-02-02 | 2018-08-10 | 赣州江钨新型合金材料有限公司 | A kind of refractory material blocked for copper outlet |
| CN106927799B (en) * | 2017-04-06 | 2020-03-24 | 江苏江能新材料科技有限公司 | Chromium mud special for submerged arc furnace and preparation method thereof |
| CN111995375B (en) * | 2020-08-07 | 2022-02-01 | 湖南鑫玺新材料有限公司 | Magnesium environment-friendly stemming for submerged arc furnace and preparation method thereof |
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| CN101407399A (en) * | 2007-11-30 | 2009-04-15 | 北京冶建新技术公司 | Magnesium micro-expansion stemming for blast furnace |
| CN101723685B (en) * | 2008-10-17 | 2012-06-06 | 北京冶建新技术公司 | Magnesia-alumina spinel stemming |
| CN102225867B (en) * | 2011-05-24 | 2013-04-17 | 河南益丰高温材料股份有限公司 | Silicon carbide furnace door brick for ore-smelting electric furnace and preparation method thereof |
| CN102432320A (en) * | 2011-09-22 | 2012-05-02 | 云南文山斗南锰业股份有限公司 | Hole-blocking refractory material for taphole of ore smelting electric furnace and manufacturing method thereof |
| CN202329196U (en) * | 2011-12-20 | 2012-07-11 | 叶乐 | Groove carbon block for molten iron flow groove of ore-smelting electric furnace |
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