CN100467425C - Low-cost durable blast furnace residue channel material - Google Patents
Low-cost durable blast furnace residue channel material Download PDFInfo
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- CN100467425C CN100467425C CNB2006100284761A CN200610028476A CN100467425C CN 100467425 C CN100467425 C CN 100467425C CN B2006100284761 A CNB2006100284761 A CN B2006100284761A CN 200610028476 A CN200610028476 A CN 200610028476A CN 100467425 C CN100467425 C CN 100467425C
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- blast furnace
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- channel material
- slag runner
- slag
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Abstract
The invention discloses a low-cost durable blast furnace slag runner material, which comprises the following parts: 25-75% used slag runner material as raw material, 0-40% used main runner material, base, disperser and other aggregates, wherein the used runner material is composed of 68-75% Al2O3, 8-14% SiC, 5-10% SiO2, 0.5-1.5% C; the used main runner material contains 55-70% Al2O3, 20-30% SiC and 2-4% C; the adding quantity of total used material is 25-75%; the base is 10-15% carborundum powder, 3-7% alumina powder, 2-3% silica powder less than 3% pure calcium-aluminate cement, 0.5-1.5% metal silicon powder and 0.5-2% tar; the disperser is beta-naphthalenesulfonate formaldehyde condensate; the other aggregate is one of brown fused alumina or special grade alumina. The regenerative slag runner material reduces the cost of slug runner material greatly without decreasing the erosion resistance, which is fit for slag runner and iron runner.
Description
Technical field
The present invention relates to the casting house mould material, particularly a kind of low-cost durable blast furnace residue channel material.
Background technology
Casting house is the passage that high temperature liquid iron and slag are flowed through, and the direct motion of daily blast furnace ironmaking is played important effect.The blast furnace casting field system by tap drain (comprising tap drain slag line and tap drain iron wire), iron runner, slag runner, cover the slag device and pour into ditch and form.
The slag runner of large blast furnace though the antiscour eating condition does not have tap drain so harsh, is subjected to the strong erosion of high-temperature slag and the rapid heat cycle of temperature and changes.So the slag runner mould material adopts Al
2O
3Low cement of-SiC-C matter or ultra-low cement deposit material, its main raw material generally adopts brown corundum, and sometimes, aggregate also adds some high grade bauxite.
The blast furnace iron outlet groove refractory materials is the subsidiary material in the Iron and Steel Production, is again running stores simultaneously, has occupied certain ratio in the Iron and Steel Production cost.Prolong the work-ing life of refractory materials, reduce the consumption and the manufacturing cost of refractory materials, be the direction that iron and steel enterprise makes great efforts always.And about the technology of main channel material always at Continual Improvement, its performance improves constantly, one time iron influx has reached 120,000 tons or higher, therefore, the slag runner material must be caught up with the development of main channel material, needs to reduce the cost of slag runner material simultaneously.
Summary of the invention
The purpose of this invention is to provide one and low-cost durable blast furnace residue channel material; main employing is a main raw material with back slag runner material (hereinafter to be referred as expecting with the back); compare with the slag runner material with existing; has lower cost; good slag resistance, and for saving the refractory raw material resource, reduce discharging with back anti-material, improving environment and recycling economy has very positive meaning.
To achieve these goals, the invention provides a kind of low-cost durable blast furnace residue channel material, its composition weight percent is:
Main raw material:
With back slag runner material: 25-75%;
With back main channel material: 0-40%;
The matrix material:
Carbide fine powder: 10-15%;
Alumina powder: 3-7%;
Ultrafine silica powder: 2-3%;
Metallic silicon power: 0.5-1.5%;
Pitch: 0.5-2%;
Pure calcium aluminate cement :≤3%;
Dispersion agent adds: 0.1-0.3%;
All the other are aggregate, and aggregate is a kind of in brown corundum or the high grade bauxite.
Preferably, above-mentioned is 25-75% with back slag runner material with the total add-on of back main channel material.
Preferable, above-mentionedly be classified into 8-5,5-3,3-1,1-0 shelves according to its globule size with back slag runner material with the back main channel material, wherein the 1-0 shelves are controlled at below 15% with the weight percent of afterwards expecting.
Below be the effect and the qualification explanation thereof of main component of the present invention:
With back slag runner material: 25-75%; With back main channel material: 0-40%
With back slag runner material with the total add-on of back main channel material is 25-75%.
Main inventive point of the present invention adds exactly with the back material makes the regeneration iron runner material, has not only reduced the manufacturing cost of iron runner material, and has helped environment protection, realizes recycling economy.If less with back material add-on, be lower than 25%, it is not obvious then to reduce cost; Surpass 75% as add-on, the amount of water of reworked material also can continue to increase, and because the adding of matrix material (carbide fine powder, alumina powder etc.) is restricted, is difficult to make reworked material to have good resistance to fouling.
At first, will with after the slag runner material pulled down handle.Because have carbon and silicon carbide in the slag runner material, slag iron is poor to the wettability of mould material, seldom there are infiltration of slag iron and slag iron to adhere to the back material, so do not need handling especially with the back material, this is very favourable to waste disposal.Slag iron is adherent can manually be implemented to separate with back material piece for obviously having, and bulk is adopted the jaw crusher fragmentation with the back material, become small-particle with roll crusher or cone crushing again, sieve then and deironing, be classified into 8-5,5-3,3-1,1-0 fourth gear raw material.Employing with quadrat method to the back main channel material handle.
In order to make cost of the present invention low, have good performance again, 1-0 will be restricted with the add-on of back material.1-0 contains more SiC and C with in the back material, and they are relatively poor with the wetting ability of water, can increase the amount of water that contains the mould material (hereinafter to be referred as reworked material) of expecting useful back.Therefore be necessary suitably to control the ratio of 1-0, be controlled at 15% below better, preferably be controlled at below 10% with the back material.
The slag runner material adopts low cement or ultra-low cement combination technology, has densification, advantages of high strength.With after expect that near the working face particularly mould material through secular high temperature action, has formed ceramic post sintering, have higher intensity, therefore expect unavoidably can contain some false particles after the fragmentation with the back, these false particles matrix and particle often combine.Though these false particles have enough intensity, allocate as raw material that mould material produces into can be broken again when stirring, there is the amount of water that can increase mould material in false particulate.Both cost was low in order to make regeneration slag runner material (hereinafter to be referred as reworked material), had good performance again, and the present invention has taked multiple measure.
Dispersion agent: 0.1-0.3%
With efficient organic dispersion agent beta-naphthalenesulfonic-acid salt formaldehyde condensation products is dispersion agent, helps controlling amount of water.If add-on is lower than 0.1%, then water-reducing effect is not obvious, if add-on surpasses 0.2%, not only water-reducing effect can not have clear improvement, and can increase cost.
Carbide fine powder: 10-15%;
Add carbide fine powder, purpose is the SiC content that increases reworked material, improves resistance to fouling and oxidation-resistance.This is because more when expecting with the back when adding, and unavoidably can improve amount of water, and the performance that makes reworked material particularly resistance to fouling is subjected to obvious influence.Therefore, the present invention suitably increases the SiC content of reworked material, to remedy the negative impact that the amount of water increase brings, makes the resistance to fouling of reworked material maintain level preferably.If add-on is lower than 10%, then SiC improves the DeGrain of resistance to fouling and oxidation-resistance, surpasses 15% as add-on, then can increase the cost of reworked material.
Alumina powder: 3-7%
Matrix adds enough alumina powders, and purpose is to improve density and hot strength, has enough normal temperature, hot strength and good resistance to fouling to guarantee reworked material.It is better that alumina powder adds 3-7%, is lower than 3%, obvious inadequately with the effect that improves high-temperature behavior to improving density, as surpassing 7%, unfavorable to the cost of control reworked material.
Ultrafine silica powder: 2-3%
Ultrafine silica powder plays diminishing and nodulizing, and matrix adds enough ultrafine silica powders, has enough normal temperature, hot strength and good resistance to fouling to guarantee reworked material.It is better that ultrafine silica powder adds 2-3%, is lower than 2%, diminishing and enhanced DeGrain, and as surpassing 3%, it is unfavorable to resistance to fouling too much to introduce silicon oxide.
Metallic silicon power: 0.5-1.5%
Metallic silicon power can play antioxygenation, and the reaction of silicon and carbon generates silicon carbide under the high temperature, can play enhancing (promptly improving the intensity of mould material) effect.Silica flour adds 0.5-1.5%, is lower than 0.5%, and is anti-oxidant not obvious with enhancement, surpasses 1.5%, unfavorable to controlling cost.
Pitch: 0.5-2%
It is to improve resistance to fouling that matrix adds the pitch purpose, because the pitch carbon containing, and slag iron does not produce the profit effect of invading to carbon, can improve resistance to fouling so add pitch.Be lower than 0.5% as add-on, then improve the DeGrain of resistance to fouling, surpass 2%, ftracture when then the pitch of more content causes the mould material baking easily as add-on.
Pure calcium aluminate cement :≤3%
It is raising intensity that matrix adds the pure calcium aluminate cement purpose, improves the over-all properties of reworked material, guarantees that particularly reworked material has good resistance to fouling, control cement add-on, and to reduce the negative impact that CaO produces resistance to fouling, cement is better below 2.5%.
Compared with prior art, the invention has the advantages that: the present invention adds a part back slag runner material or main channel material when producing iron runner material, can reduce the cost of slag runner material significantly, simultaneously, by meticulous adjustment prescription, the amount of water of control mould material makes the slag runner material that is made into have enough intensity and good resistance to fouling, can satisfy the service requirements of slag runner material slag corrosion resistance.Like this, not only reduced the manufacturing cost and the ton iron refractory materials cost of slag runner material, and saved limited refractory raw material resource,, had very positive meaning recycling economy and environment protection.
Embodiment
Below be specifying of the embodiment of the invention 1-4.
Table 1 has been listed proportioning of the present invention.The aggregate employing of numbering 1,2 is a part of with back slag runner material, slag runner material after the aggregate of numbering 3 all adopts and uses, and a part of aggregate of numbering 4,5 is by alternative with the back main channel material.
Table 1 unit: wt%
Table 2 has been listed the performance of example and comparative example.Numbering 0 is existing performance with the slag runner material.Though the aggregate of example (numbering 1-3) has adopted a lot with back material (numbering 3,4,5 all is with the back material), but owing to adopted good matrix composition, ultra-low cement combination technology and efficient organic dispersion agent, effectively controlled the amount of water of reworked material, make reworked material densification intensity height again, the overall performance of reworked material is better than existing materials.
Table 2
Table 3 has been listed the index of proof invention effect.Adopt erosion index and cost index can reflect the quality of iron runner material simultaneously.With the comparative example is benchmark, and erosion index is big more relatively, illustrates that resistance to fouling is poor more; The relative cost index is low more, and the cost of illustrative material is low more.As can be seen, the resistance to fouling of reworked material is better than existing materials, mainly is that the present invention has adopted good matrix and ultra-low cement combination technology, by meticulous adjusting prescription, the amount of water of reworked material is under control.Reworked material embodies the rodent while of good resistance, greatly reduces manufacturing cost.The part aggregate adopts with numbering 4 its resistance to foulings of back main channel material best, mainly is all to be higher than with back slag runner material because of SiC and C content with the back main channel material.
Table 3
Remarks: the mensuration of above-mentioned traditional performance is carried out according to GB, and resistance to fouling adopts crucible method, and each crucible adds the 15g blast furnace slag, measures after 1500 ℃ of burnings to corrode area.
Claims (3)
1. blast furnace residue channel material, its composition weight percent is:
Main raw material:
With back slag runner material: 25-75%;
With back main channel material: 0-40%;
The matrix material:
Carbide fine powder: 10-15%;
Alumina powder: 3-7%;
Ultrafine silica powder: 2-3%;
Metallic silicon power: 0.5-1.5%;
Pitch: 0.5-2%;
Pure calcium aluminate cement :≤3%;
Dispersion agent adds: 0.1-0.3%;
All the other are aggregate, and aggregate is a kind of in brown corundum or the high grade bauxite.
2. blast furnace residue channel material according to claim 1 is characterized in that, described is 25-75% with back slag runner material with the total add-on of back main channel material.
3. blast furnace residue channel material according to claim 1 and 2 is characterized in that, describedly is classified into 8-5,5-3,3-1,1-0 shelves with back slag runner material with the back main channel material according to its globule size, and wherein the 1-0 shelves are controlled at below 15% with the weight percent of afterwards expecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100284761A CN100467425C (en) | 2006-06-30 | 2006-06-30 | Low-cost durable blast furnace residue channel material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100284761A CN100467425C (en) | 2006-06-30 | 2006-06-30 | Low-cost durable blast furnace residue channel material |
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| CN101096313A CN101096313A (en) | 2008-01-02 |
| CN100467425C true CN100467425C (en) | 2009-03-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104557070A (en) * | 2013-10-22 | 2015-04-29 | 河北联合大学 | Application method of reworked material of used alumina-magnesia-carbon ladle lining bricks |
| CN110615688B (en) * | 2018-06-19 | 2022-01-14 | 宝山钢铁股份有限公司 | Low-cost long-life blast furnace taphole mud sleeve and preparation method thereof |
| CN115093238B (en) * | 2022-08-22 | 2022-11-29 | 湖南立达高新材料有限公司 | Refractory castable for tapping channel of submerged arc furnace and preparation method thereof |
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