CN105272316A - Spinel ladle brick and preparation method thereof - Google Patents
Spinel ladle brick and preparation method thereof Download PDFInfo
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- CN105272316A CN105272316A CN201510788600.3A CN201510788600A CN105272316A CN 105272316 A CN105272316 A CN 105272316A CN 201510788600 A CN201510788600 A CN 201510788600A CN 105272316 A CN105272316 A CN 105272316A
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- ladle brick
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Abstract
The invention discloses a spinel ladle brick in the field of refractory materials and a preparation method thereof. The ladle brick is mainly used for smelting ladles of vanadium titanium magnetite. The ladle brick is characterized in that the ladle brick is prepared from, by mass, 30-40% of refractory aggregate, 23-30% of sub-white corundum powder, 10-15% of alumina micro powder, 8-10% of fused magnesia powder, 3-6% of phosphate, 2-5% of silica powder, 1-3% of silicon melt glue, 1-3% of sulfurous acid and 1-3% of solid resin. Chemical components of the spinel ladle brick comprise, by weight, 68-73% of MgO, 12-17% of Al2O3, 6-10% of C and the balance Si and inevitable impurities. According to the spinel ladle brick, the production technology is simple, harmful smelting impurities such as S and P are not contained, chemical activity is good, the spinel ladle brick can be widely used for meeting smelting requirements of electrical steel, special steel, clean steel, mild steel, ordinary steel and various types of steel, the service life of the ladle brick can be substantially prolonged, and economic value is obvious.
Description
Technical field
The present invention relates to fire resisting material field, ladle sharp brilliant refractory brick and preparation method thereof when being specifically related to a kind of v-bearing titanomagnetite smelting.
Background technology
Ladle is that it is made up of steel construction, refractory materials, slide mechanism, the lower mouth of a river, is mainly used in steelworks, foundry and before open hearth, electric furnace or converter, accepts molten steel, carries out pouring practice for splendid attire after stove and the container carrying molten steel, external refining.As the important raw and processed materials refractory brick of ladle, the main raw material such as carbon, corundum and electrosmelted magnesite clinker is generally adopted to form, with special reagent and a small amount of solid resin for bonding agent is made.Be mainly used in, at the bottom of ladle inner wall and tank, pollution during smelting molten steel can being reduced.
The ore of Panxi Diqu mostly is high-titanium type vanadium-titanium magnetite, and vanadium iron magnetite is the complex ore of the multielement symbiosis such as a kind of iron, vanadium, titanium, chromium, cobalt, nickel, and associated element is extremely many, is also a kind of main blast-furnace smelting raw material.This ore grade is lower, and wherein TFe content is 52% ~ 54%, SiO
2be 3.2%, TiO
2be 12% ~ 13%, and granularity is thicker.Vanadium iron magnetite smelt time molten steel in V
2o
5, TiO
2higher, to the melting loss index of refractory materials up to 42.9%, depth of penetration is 1.5 times of common ore.Very serious to refractory corrosion, common refractory cannot be applicable to the smelting of vanadium titano-magnetite at all.As most important starting material refractory brick in smelting, work-ing life is extremely low, smelting requirements cannot be reached, mainly there is the problems such as combining form is simple, aggregate is poor with powder associativity, molten steel is easily separated under impacting, cause ladle shorter for work-ing life, thus limit development and the application of Clean Steel production technology.
Summary of the invention
Corrode seriously in the smelting of vanadium iron magnetite for overcoming existing refractory brick, work-ing life, short grade was not enough, and technical problem to be solved by this invention is: provide a kind of structure more stable, the brilliant refractory brick of the point that corrosion resistance is stronger.
The technical solution adopted for the present invention to solve the technical problems is:
The brilliant refractory brick of point of the present invention, is characterized in that:
The brilliant refractory brick of described point comprises and being made up of the component of following weight per-cent: refractory aggregate: 30 ~ 40%, sub-white corundum powder: 23 ~ 30%, alumina powder: 10 ~ 15%, electrofusion magnesia powder: 8 ~ 10%, phosphoric acid salt: 3 ~ 6%, silicon powder: 2 ~ 5%, silicon melten gel: 1 ~ 3%, sulfurous acid: 1 ~ 3%, solid resin: 1 ~ 3%;
The chemical component weight per-cent of the brilliant refractory brick of described point is: MgO:68 ~ 73%, Al
2o
3: 12 ~ 17%, C:6 ~ 10%, surplus is Si and inevitable impurity.
Preferred scheme is: the brilliant refractory brick of described point is made up of the component of following weight per-cent: refractory aggregate: 38%, sub-white corundum powder: 27%, alumina powder: 11%, electrofusion magnesia powder: 8.5%, phosphoric acid salt: 5.5%, silicon powder: 4%, silicon melten gel: 2%, sulfurous acid: 2%, solid resin: 2%.
Further: described refractory aggregate is the aggregate that one or more in sub-white corundum or Brown Alundum system refractory raw material make critical particle size 5mm.
Present invention also offers the preparation method of this sharp brilliant refractory brick, obtain according to following steps, first raw material good for proportioning is carried out mix and blend, ageing mixture is after 10 ~ 30 minutes, use pressing machine compression moulding, then heat-treat, utilize refractory product particle and the inconsistent characteristic of thermal expansion coefficient, make to produce hair line in goods.
Further, the intensity of described pressing machine compacting is not less than 40MPa.
The invention has the beneficial effects as follows:
1, the brilliant refractory brick production technique of the present invention's point is simple, and do not contain S, P etc. and smelt detrimental impurity, chemically reactive is good, does not need to dry, without sewage discharge during use, without noxious gas emission, is mixed in proportion coldmoulding drying after stirring.
2, processability is excellent, once shaped rate up to 90%, Stability Analysis of Structures, 2m is high fall not broken, do not fall apart.
3, the brilliant refractory brick of the present invention's point is applied widely, and can be widely used in all kinds of shaped steel clock such as electrical steel, special steel, Clean Steel, soft steel, ordinary steel and smelt demand, economic worth is obvious, and to smelting ore as without particular requirement, highly versatile.
Embodiment
Below by way of embodiment, the invention will be further described, but should not be understood as restriction of the present invention.Those of ordinary skill in the art, according to such scheme, can also make various forms of amendment, replacement, change.Every amendment, replacement and change done based on above-mentioned technological thought all belongs to scope of the present invention.
The brilliant refractory brick of point of the present invention, is characterized in that:
The brilliant refractory brick of described point comprises and being made up of the component of following weight per-cent: refractory aggregate: 30 ~ 40%, sub-white corundum powder: 23 ~ 30%, alumina powder: 10 ~ 15%, electrofusion magnesia powder: 8 ~ 10%, phosphoric acid salt: 3 ~ 6%, silicon powder: 2 ~ 5%, silicon melten gel: 1 ~ 3%, sulfurous acid: 1 ~ 3%, solid resin: 1 ~ 3%;
The chemical component weight per-cent of the brilliant refractory brick of described point is: MgO:68 ~ 73%, Al
2o
3: 12 ~ 17%, C:6 ~ 10%, surplus is Si and inevitable impurity.
The scheme of choosing is: the brilliant refractory brick of described point is made up of the component of following weight per-cent: refractory aggregate: 38%, sub-white corundum powder: 27%, alumina powder: 11%, electrofusion magnesia powder: 8.5%, phosphoric acid salt: 5.5%, silicon powder: 4%, silicon melten gel: 2%, sulfurous acid: 2%, solid resin: 2%.
Further, described refractory aggregate is the aggregate that one or more in sub-white corundum or Brown Alundum system refractory raw material make critical particle size 5mm.
In aggregate proportioning, corundum system raw material, as fused corundom, compact alumina, plate diamond spar etc., but by test, sub-white corundum and Brown Alundum are more suitable for the smelting for vanadium titano-magnetite, the size of aggregate is not more than 5mm, to make itself and other material mixing even, more stable in one-piece construction.Silicon melten gel and sulfurous acid play tackiness agent, for mixing bonded metal powder and aggregate, improve the abrasion resistance of this refractory brick.
The preparation method of the brilliant refractory brick of the present invention's point, obtain according to following steps, first raw material good for proportioning is carried out mix and blend, ageing mixture is after 10 ~ 30 minutes, use pressing machine compression moulding, then heat-treat, utilize refractory product particle and the inconsistent characteristic of thermal expansion coefficient, make to produce hair line in goods.Thermal treatment just carries out suitable Baking out to the brilliant refractory brick of shaping point, remove moisture, or being directly placed on dry place makes it dry voluntarily, object is the characteristic in order to utilize the thermal expansion coefficient of refractory aggregate particle and other powdery inconsistent, make its inner generation hair line, this crackle is expanded in quasistatic mode, to improve the thermal shock resistance of sharp brilliant refractory brick.The brilliant refractory brick of point is formed by compacting, does not carry out high temperature baking, therefore in carrying, packaging, transport and building process, need keep certain intensity, be security consideration, cold crushing strength should be greater than 40MPa, so when suppressing with pressing machine, the pressure of at least 40MP need be adopted.
Embodiment:
Carry out proportioning with preferred sharp brilliant refractory brick mass component, comprise following component: refractory aggregate 38%, sub-white corundum powder 27%, alumina powder 11%, electrofusion magnesia powder 8.5%, phosphoric acid salt 5.5%, silicon powder 4%, silicon melten gel 2%, sulfurous acid 2%, solid resin 2%.Said components is entered stirrer to stir, mix rear discharging, ageing mixture 30 minutes, then by pressing machine compression moulding, enter dry kiln 200 DEG C of dryings and obtain product in 24 hours.From finished product, arbitrarily extract 6 groups analyze, show that average data is as follows:
Then used and actual production, draw and reach 99.5 times/tank labour the mean life of this sharp brilliant refractory brick, maximum life span reaches 108 times/tank labour, significantly promotes work-ing life, can meet steel mill's Production requirement completely compared to traditional refractory brick.And this sharp brilliant refractory brick steady quality, anti-oxidant, antistripping ability is strong, and wear and tear speed fluctuation is between 0.8 ~ 1.1mm/ time, and average out to 0.95mm/ time, when ladle stops overhaul, residual brick thickness fluctuation is between 55 ~ 100mm, average out to 75.5mm.
As can be seen from the above-described embodiment, use that the brilliant refractory brick of the point of coldmoulding of the present invention is anti-oxidant, antistripping ability strong, high life, remarkable in economical benefits.Can according to ladle type and processing requirement, designed, designed refractory brick shape.Can adjust in scope disclosed by the invention the mass fraction of each component in the brilliant refractory brick of point, the proportioning after adjustment coordinates cold compression molding method gained refractory brick of the present invention all can reach smelting requirements.
Claims (5)
1. sharp brilliant refractory brick, is characterized in that:
The brilliant refractory brick of described point comprises and being made up of the component of following weight per-cent: refractory aggregate: 30 ~ 40%, sub-white corundum powder: 23 ~ 30%, alumina powder: 10 ~ 15%, electrofusion magnesia powder: 8 ~ 10%, phosphoric acid salt: 3 ~ 6%, silicon powder: 2 ~ 5%, silicon melten gel: 1 ~ 3%, sulfurous acid: 1 ~ 3%, solid resin: 1 ~ 3%;
The chemical component weight per-cent of the brilliant refractory brick of described point is: MgO:68 ~ 73%, Al
2o
3: 12 ~ 17%, C:6 ~ 10%, surplus is Si and inevitable impurity.
2. sharp brilliant refractory brick as claimed in claim 1, is characterized in that: the brilliant refractory brick of described point is made up of the component of following weight per-cent: refractory aggregate: 38%, sub-white corundum powder: 27%, alumina powder: 11%, electrofusion magnesia powder: 8.5%, phosphoric acid salt: 5.5%, silicon powder: 4%, silicon melten gel: 2%, sulfurous acid: 2%, solid resin: 2%.
3. sharp brilliant refractory brick as claimed in claim 1, is characterized in that: described refractory aggregate is the aggregate that one or more in sub-white corundum or Brown Alundum system refractory raw material make critical particle size 5mm.
4. the preparation method of the brilliant refractory brick of point according to claim 1, it is characterized in that: obtain according to following steps, first raw material good for proportioning is carried out mix and blend, ageing mixture is after 10 ~ 30 minutes, use pressing machine compression moulding, then heat-treat, utilize refractory product particle and the inconsistent characteristic of thermal expansion coefficient, make to produce hair line in goods.
5. the preparation method of sharp brilliant refractory brick as claimed in claim 4, is characterized in that: the intensity of described pressing machine compacting is not less than 40MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510788600.3A CN105272316A (en) | 2015-11-17 | 2015-11-17 | Spinel ladle brick and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510788600.3A CN105272316A (en) | 2015-11-17 | 2015-11-17 | Spinel ladle brick and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105272316A true CN105272316A (en) | 2016-01-27 |
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|---|---|---|---|
| CN201510788600.3A Pending CN105272316A (en) | 2015-11-17 | 2015-11-17 | Spinel ladle brick and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113104A (en) * | 2007-07-11 | 2008-01-30 | 重庆钢铁(集团)有限责任公司 | Production of composite corundum carbon brick for ladle |
| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
| CN103044041A (en) * | 2012-12-27 | 2013-04-17 | 内蒙古包钢利尔高温材料有限公司 | Alumina-magnesia brick for refined steel ladle wall |
| CN103539467A (en) * | 2013-10-16 | 2014-01-29 | 马鞍山利尔开元新材料有限公司 | Mechanically-pressed carbon-free corundum spinel ladle brick as well as preparation method thereof |
-
2015
- 2015-11-17 CN CN201510788600.3A patent/CN105272316A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113104A (en) * | 2007-07-11 | 2008-01-30 | 重庆钢铁(集团)有限责任公司 | Production of composite corundum carbon brick for ladle |
| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
| CN103044041A (en) * | 2012-12-27 | 2013-04-17 | 内蒙古包钢利尔高温材料有限公司 | Alumina-magnesia brick for refined steel ladle wall |
| CN103539467A (en) * | 2013-10-16 | 2014-01-29 | 马鞍山利尔开元新材料有限公司 | Mechanically-pressed carbon-free corundum spinel ladle brick as well as preparation method thereof |
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Effective date of abandoning: 20181019 |