CN103896607A - Alkaline anhydrous tamping plug for ore-smelting electric furnace - Google Patents
Alkaline anhydrous tamping plug for ore-smelting electric furnace Download PDFInfo
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- CN103896607A CN103896607A CN201410074594.0A CN201410074594A CN103896607A CN 103896607 A CN103896607 A CN 103896607A CN 201410074594 A CN201410074594 A CN 201410074594A CN 103896607 A CN103896607 A CN 103896607A
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Abstract
The invention relates to an alkaline anhydrous tamping plug for an ore-smelting electric furnace. The alkaline anhydrous tamping plug for the ore-smelting electric furnace is prepared from the following raw materials in parts by weight: 33-49 parts of fused magnesite with the particle size of 16-200 meshes, 13-16 parts of graphite scrap with the particle size less than 3mm, 4-6 parts of asphalt powder with the particle size less than or equal to 1mm, 9-16 parts of spinel with the particle size of 200 meshes, 1-6 parts of rare earth oxide, 0.6 part of cellulose, 0.4 part of dextrin and 10-13 parts of compound oil. The alkaline anhydrous tamping plug for the ore-smelting electric furnace has the advantages that alkaline refractory materials which are magnesium materials mainly are adopted, graphite scrap and asphalt powder can increase carbon content of the tamping plug finished product, slag invading resistance of the tamping plug finished product is improved, the graphite scrap also can cause the tamping plug finished product to be easily opened after being sintered in an iron notch, and the asphalt powder can cause the tamping plug product to be smooth and extruded easily; spinel and chromium sand are added, so that sintering hardness of the tamping plug product can be improved, and washing resistance of the tamping plug product can be enhanced; the rare earth oxide is added, so that sintering of the tamping plug finished product can be promoted; cellulose, detrixin and compound oil are bonding agents of the tamping plug product, so that the tamping plug product can meet viscosity and plasticity requirements.
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 be used stemming in the time 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 aluminium carbonaceous anhydrous stemming to process iron mouth.Along with further becoming more meticulous and the power consumption control requirement of energy-saving and emission-reduction of smelting technology, adopt the steel alloy such as ferronickel, silicomanganese of blast-furnace smelting to change gradually ore-smelting furnace into before and smelt.While adopting ore-smelting furnace alloy smelting steel, many producers still adopt the aluminium carbonaceous anhydrous stemming of using on blast furnace to process iron mouth.The liner of ore-smelting furnace is generally built by laying bricks or stones by magnesia or magnesia carbon refractory, iron notch is also corresponding magnesia or magnesium carbonaceous basic refractory, because the material of aluminium carbonaceous anhydrous stemming is not identical with the main material at ore-smelting furnace iron notch place, can produce not merging of storeroom and even occur rejection, cause having occurred in production process many problems: as stemming is pressed into difficulty or compression distance is inadequate, between the refractory brick at iron notch place and stemming, occur oozing iron phenomenon, the serious stemming that even occurs 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 parts proportioning 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 orders, 33 ~ 49 parts;
Graphite bits: granularity < 3mm, 13 ~ 16 parts;
Asphalt powder: granularity≤1mm, 4 ~ 6 parts;
Spinel: granularity 200 orders, 9 ~ 16 parts;
Rare earth oxide: 1 ~ 6 part;
0.6 part of Mierocrystalline cellulose;
0.4 part, dextrin.
Compounded oil: 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 4 ~ 11 parts of the electrosmelted magnesite clinkers of granularity 1 ~ 3mm; 1 ~ 7 part, the chromium sand of granularity < 1mm.
Described granularity 16 order ~ 200 orders, in the electrosmelted magnesite clinker of 33 ~ 49 parts, granularity 200 object electrofusion magnesia powders are 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 that employing possesses heating function mixes, first mixing pan is cleaned out and is heated to design temperature (>=45 ℃), then add successively in order dried raw material: first add particulate material more than granularity 1mm to be dry mixed 2 minutes, add again dextrin, the particulate material of Mierocrystalline cellulose and 1mm left and right is dry mixed 3 minutes, then add 1/2 compounded oil, wet stone roller after 10 minutes, all residue powders are added, rewetting is ground 5 minutes, finally remaining 1/2 compounded oil is added wet stone roller of rear continuation within 10 minutes, to become pug, send into mud extruder from mixing pan pug out through handling equipment, extrude and meet the mud post that volume density requires, mud post cuts off by specification, can obtain anhydrous stemming finished product, packing warehouse-in.
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 ℃ × 3h, MPa | ≥12 |
| Folding strength CMOR, 1450 ℃ × 3h, MPa | ≥2 |
| Application | Large, medium and small ore-smelting furnace |
The invention has the advantages that and adopt take magnesian as main basic refractory, reach an agreement with the material of ore-smelting furnace liner, more affine with iron mouth place refractory brick, graphite bits and asphalt powder have increased the carbon content of stemming finished product, the product opposing slag ability of invading is improved, simultaneously graphite bits can also make product easy opening after sintering in iron mouth, and asphalt powder can make the smooth mud that easily squeezes 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; The bonding agent that Mierocrystalline cellulose, dextrin, compounded oil are product, makes product possess the requirement of stickiness and plasticity.
Embodiment
embodiment 1
The alkaline anhydrous stemming that RPNM-35 type ore-smelting furnace is used 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 is cleaned out and is heated to design temperature (>=45 ℃), first add one-level magnesia, graphite bits particulate material is dry mixed 2 minutes, add again dextrin, Mierocrystalline cellulose and electrosmelted magnesite clinker particulate material, thinner graphite bits particulate material is dry mixed 3 minutes, then add 1/2 compounded oil, wet stone roller after 10 minutes, remaining all powders are added, wet stone roller after 5 minutes adds remaining 1/2 compounded oil, wet stone roller makes it become pug for 10 minutes, pug is delivered in RJN-21 mud extruder, be extruded into the mud post of diameter 160mm ~ 220mm, be cut into again the anhydrous stemming finished product of length 250 mm ~ 320 mm, packing warehouse-in.
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 ℃ × 3h)>=12MPa; Folding strength CMOR(1450 ℃ × 3h)>=2 MPa.
Experimental results show that on ore-smelting furnace through smeltery: this alkalescence anhydrous stemming meets the service requirements of ore-smelting furnace iron notch completely.Because this anhydrous stemming is easily clamp-oned, hobbing depth can reach 1300mm; Easily opening, the 120 minutes time of tapping a blast furnace there will not be reaming phenomenon.
embodiment 2:
The alkaline anhydrous stemming that RPNM-38 type ore-smelting furnace is used 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 is cleaned out and is heated to design temperature (>=45 ℃), first add one-level magnesia, electrosmelted magnesite clinker particulate material, graphite bits particulate material is dry mixed 2 minutes, add again dextrin, the particulate material that Mierocrystalline cellulose and electrosmelted magnesite clinker are thinner, thinner graphite bits particulate material, thicker chromium sand particulate material is dry mixed 3 minutes, then add 1/2 compounded oil, wet stone roller after 10 minutes, remaining all powders are added, wet stone roller after 5 minutes adds remaining 1/2 compounded oil, wet stone roller makes it become pug for 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, packing warehouse-in.
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 ℃ × 3h)>=15MPa; Folding strength CMOR(1450 ℃ × 3h)>=2.5 MPa.
Experimental results show that on ore-smelting furnace through smeltery: this alkalescence anhydrous stemming meets the service requirements of ore-smelting furnace iron notch completely.Because this anhydrous stemming is easily clamp-oned, hobbing depth can reach 1300mm; Easily opening, the 120 minutes time of tapping a blast furnace there will not be reaming phenomenon.
embodiment 3:
The alkaline anhydrous stemming that RPNM-42 type ore-smelting furnace is used 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 is cleaned out and is heated to design temperature (>=45 ℃), first add one-level magnesia, electrosmelted magnesite clinker particulate material, graphite bits particulate material is dry mixed 2 minutes, add again dextrin, the particulate material that Mierocrystalline cellulose and electrosmelted magnesite clinker are thinner, thinner graphite bits particulate material, thicker chromium sand particulate material is dry mixed 3 minutes, then add 1/2 compounded oil, wet stone roller after 10 minutes, remaining all powders are added, wet stone roller after 5 minutes adds remaining 1/2 compounded oil, wet stone roller makes it become pug for 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, packing warehouse-in.
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 ℃ × 3h)>=18MPa; Folding strength CMOR(1450 ℃ × 3h)>=2.8 MPa.
Experimental results show that on ore-smelting furnace through smeltery: this alkalescence anhydrous stemming meets the service requirements of ore-smelting furnace iron notch completely.Because this anhydrous stemming is easily clamp-oned, hobbing depth can reach 1300mm; Easily opening, the 120 minutes time of tapping a blast furnace there will not be reaming phenomenon.
Claims (6)
1. the alkaline anhydrous stemming of ore-smelting furnace, is characterized in that: it is formulated by following weight parts proportioning 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 orders, 33 ~ 49 parts;
Graphite bits: granularity < 3mm, 13 ~ 16 parts;
Asphalt powder: granularity≤1mm, 4 ~ 6 parts;
Spinel: granularity 200 orders, 9 ~ 16 parts;
Rare earth oxide: 1 ~ 6 part;
0.6 part of Mierocrystalline cellulose;
0.4 part, dextrin;
Compounded oil: 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 that also comprises granularity 1 ~ 3mm in described raw material.
3. the alkaline anhydrous stemming of ore-smelting furnace according to claim 1, is characterized in that: 4 ~ 11 parts of electrosmelted magnesite clinkers that also comprise 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 orders, in the electrosmelted magnesite clinker of 33 ~ 49 parts, granularity 200 object electrofusion magnesia powders are 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, the ratio of the two is resin: tar=20% ~ 35%:65% ~ 80%.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105732058A (en) * | 2016-02-02 | 2016-07-06 | 江西稀有稀土金属钨业集团有限公司 | Fire-resistant material used for plugging copper outlet |
| CN105819877A (en) * | 2014-07-16 | 2016-08-03 | 山国强 | Novel environment-friendly blast furnace stemming |
| CN106927799A (en) * | 2017-04-06 | 2017-07-07 | 江苏江能新材料科技有限公司 | A kind of special chromium mud of mineral hot furnace and preparation method |
| CN111995375A (en) * | 2020-08-07 | 2020-11-27 | 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN105732058A (en) * | 2016-02-02 | 2016-07-06 | 江西稀有稀土金属钨业集团有限公司 | Fire-resistant material used for plugging copper outlet |
| CN106927799A (en) * | 2017-04-06 | 2017-07-07 | 江苏江能新材料科技有限公司 | A kind of special chromium mud of mineral hot furnace and preparation method |
| 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 |
| CN111995375A (en) * | 2020-08-07 | 2020-11-27 | 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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