CN103664212A - Castable refractory for tundish permanent layer and preparation method of permanent layer - Google Patents
Castable refractory for tundish permanent layer and preparation method of permanent layer Download PDFInfo
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- CN103664212A CN103664212A CN201310683155.5A CN201310683155A CN103664212A CN 103664212 A CN103664212 A CN 103664212A CN 201310683155 A CN201310683155 A CN 201310683155A CN 103664212 A CN103664212 A CN 103664212A
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- granularity
- permanent layer
- ferrovanadium slag
- tundish
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Abstract
The invention belongs to the technical field of refractory materials, and particularly relates to a castable refractory for a tundish permanent layer and a preparation method of the tundish permanent layer. The raw materials of the castable refractory comprise the following components in percentage by weight: 75-90% of ferrovanadium slag, 2-10% of silicon dioxide, 3-20% of aluminium oxide and sodium hexametaphosphate of which the weight accounts for 0.15-0.30% of total weight of the three raw materials. The invention further provides a preparation method of the permanent layer. The preparation method comprises the following steps: uniformly mixing the four raw materials, adding water for uniform mixing, then pouring the mixed material into a die for natural drying and drying, so as to obtain the product. The castable refractory has the erosion resistance and use performance superior to a conventional castable for the tundish permanent layer and lower production cost, can effectively reduce the consumption of tundish refractory material in steelmaking, and develops a new application approach on comprehensive utilization of waste resources of ferrovanadium slag at the same time.
Description
Technical field
The invention belongs to technical field of refractory materials, be specifically related to the preparation method of a kind of tundish permanent layer refractory castable and permanent layer.
Background technology
Pan Gangfan industry company produces in the process of high vanadium ferroalloy in thermite process, for by the barium oxide reduction in vanadium slag, needs to add a certain amount of metallic aluminium and lime in smelting process; In order to improve the recovery rate of vanadium, smelt in later stage refining or winding-up process and also need to add a certain amount of lime to carry out slag making; What smelt that the electric furnace liner of vanadium titanium adopts is that the direct ramming of magnesia forms simultaneously, unavoidably has partial oxidation magnesium to be at high temperature fused in high temperature sludge liquid during smelting.Smelting complete vanadium iron cooling after, the calcium oxide that oxidized metallic aluminium, the magnesium oxide of fusing are used with slag making and vanadium iron are common cooling and separated, form the ferrovanadium slag cake of heavily approximately 3 tons, approximately 1.5 ten thousand tons every year, main component is Al
2o
3(its content is up to more than 60%), separately has a certain amount of calcium and magnesium oxides and other material.
At present the processing application mode of this ferrovanadium slag has two kinds: the one, ferrovanadium slag cake is directly broken into the particle of 0～15mm, and during for the production of high vanadium ferroalloy, as the refractory materials of furnace bottom, but its consumption is little; Second method is exactly that ferrovanadium slag is taken out, and by buyer, extracts residual vanadium wherein, and the ferrovanadium slag after vanadium extraction is stacked as waste.These two kinds for the treatment of processs all can not be from solving the problem that ferrovanadium slag amount is large substantially, and because vanadium iron price glides, adopt second method to process ferrovanadium slag profitless, therefore a large amount of ferrovanadium slags is stacked in a large number as trade waste, not only need a large amount of stacking places, also pollute environment, caused the wasting of resources.Because the melting through 1-2 hour under 1900 ℃ of conditions of this slag forms, its refractoriness is higher, in high-grade refractory materials direction, develops and utilizes, and walks the route of resource circulation utilization, will have good economic benefit and social benefit.
Current domestic steel-making by refractory castable general requirement is: high temperature resistant, resistance to erosion, resistance to erosion, impermeabilisation.Wherein tundish permanent layer mould material is mainly high alumina castable, and its main raw material is that bauxite chamotte is with addition of aluminous cement, SiO
2micro mist, Al
2o
3the composition such as micro mist and dispersion agent, wherein Al
2o
3content is conventionally in more than 60% left and right.Owing to adopting raw ore bauxites aggregate, its price is generally all higher 3000 yuan/ton of left and right.And ferrovanadium slag is produced the by product after high vanadium ferroalloy as Pan Gangfan industry company, it is cheap, and better performances can effectively replace general bauxites aggregate and high-alumina cement etc. and as main raw material, carry out the high-quality raw material of resistance to material and study.
The analysis of table 1 ferrovanadium slag
| Title | SiO 2，% | Al 2O 3，% | Fe 2O 3，% | CaO，% | MgO，% | Refractoriness, ℃ | Volume density, gcm -3 | TV，% |
| Ferrovanadium slag | ≤0.50 | 60～75 | ≤1.0 | 5～10 | 20～25 | ＞1790 | ＞3.0 | 1～2 |
As known from Table 1, ferrovanadium slag is with Al
2o
3with MgO be main component, total amount is greater than 85%, take CaO as time composition, its content is 5.0～10.0%, the total content of these three kinds of compositions is more than 90%, other is impurity component, wherein the impurity F e harmful to refractory materials
2o
3content, below 1.0%, should belong to lower foreign matter content, can meet the service requirements of high-quality tundish permanent layer mould material completely.
Summary of the invention
First technical problem to be solved by this invention is to provide a kind of tundish permanent layer refractory castable.This tundish permanent layer refractory castable raw material is comprised of the component of following weight per-cent: ferrovanadium slag 75～90%, and silicon-dioxide 2～10%, aluminum oxide 3～20%, accounts for the Sodium hexametaphosphate 99 that first three plants raw material gross weight 0.15～0.30%.
Preferably, above-mentioned tundish permanent layer refractory castable, described ferrovanadium slag is comprised of 5 < granularity≤10mm, 2 < granularity≤5mm, 0.1 < granularity≤2mm and tetra-kinds of specifications of granularity≤0.045mm; Mould material raw material is comprised of the component of following weight per-cent: the ferrovanadium slag 15～30% of 5 < granularity≤10mm, the ferrovanadium slag 10～35% of 2 < granularity≤5mm, the ferrovanadium slag 10～35% of 0.1 < granularity≤2mm, the ferrovanadium slag 10～30% of granularity≤0.045mm, silicon-dioxide 2～10%, aluminum oxide 3～20%, accounts for the Sodium hexametaphosphate 99 that the first six plants raw material gross weight 0.15～0.30%.
Concrete, above-mentioned tundish permanent layer refractory castable, the granularity≤0.075mm of described silicon-dioxide, the granularity≤0.075mm of described aluminum oxide.
Concrete, above-mentioned tundish permanent layer refractory castable, described ferrovanadium slag main component is Al
2o
360～75%, MgO20～25%, CaO5～10%.
Concrete, above-mentioned tundish permanent layer refractory castable, Al in described aluminum oxide
2o
3> 99%.
Concrete, above-mentioned tundish permanent layer refractory castable, SiO in described silicon-dioxide
2> 90%.
Second technical problem that the present invention solves has been to provide the preparation method of tundish permanent layer.The method comprises the following steps: raw material is mixed in proportion, then add the water that accounts for raw material gross weight 5～8% to mix, obtain compound; Compound is put into mould seasoning, the demoulding, then at 150～250 ℃, be incubated at 20～30h, 750～850 ℃, to be incubated at 40～50h, 1100～1400 ℃ and be incubated 90～100h.
Adopt the prepared tundish permanent layer stable performance of raw material of the present invention and method, can reach 800 heats in steel-making use procedure more than, than existing 600 heats, improved manyly, simultaneously can reduce the resistance to material wastage in bulk or weight in STEELMAKING PRODUCTION, met demand of industrial production completely.In addition, owing to adopting cheap ferrovanadium slag, be that main raw material can make mould material raw materials cost per ton use more at present 300 yuan of left and right of mould material cost, there is obvious economic benefit; Simultaneously also for new application approach has been opened up in the comprehensive utilization of ferrovanadium slag secondary resource.
Embodiment
A tundish permanent layer refractory castable, raw material is comprised of the component of following weight per-cent: ferrovanadium slag 75～90%, silicon-dioxide 2～10%, aluminum oxide 3～20%, accounts for the Sodium hexametaphosphate 99 that first three plants raw material gross weight 0.15～0.30%.
Preferably, in order to improve use properties, above-mentioned tundish permanent layer refractory castable, described ferrovanadium slag is comprised of 5 < granularity≤10mm, 2 < granularity≤5mm, 0.1 < granularity≤2mm and tetra-kinds of specifications of granularity≤0.045mm; Mould material raw material is comprised of the component of following weight per-cent: the ferrovanadium slag 15～30% of 5 < granularity≤10mm, the ferrovanadium slag 10～35% of 2 < granularity≤5mm, the ferrovanadium slag 10～35% of 0.1 < granularity≤2mm, the ferrovanadium slag 10～30% of granularity≤0.045mm, silicon-dioxide 2～10%, aluminum oxide 3～20%, accounts for the Sodium hexametaphosphate 99 that the first six plants raw material gross weight 0.15～0.30%.
Concrete, above-mentioned tundish permanent layer refractory castable, described ferrovanadium slag main component is Al
2o
360～75%, MgO20～25%, CaO5～10%; Al in described aluminum oxide
2o
3> 99%, granularity≤0.075mm; SiO in described silicon-dioxide
2> 90%, granularity≤0.075mm.
The preparation method of above-mentioned tundish permanent layer, comprises the following steps: raw material is mixed in proportion, then add the water that accounts for raw material gross weight 5～8% to mix, obtain compound; Compound is put into mould seasoning, the demoulding, then at 150～250 ℃, be incubated at 20～30h, 750～850 ℃, to be incubated at 40～50h, 1100～1400 ℃ and be incubated 90～100h.
The high temperature resistant thing phases such as the aluminum oxide that the ferrovanadium slag that raw material of the present invention is used contains larger proportion and magnesium oxide, according to its chemical composition scope, determined the ferrovanadium slag that adds different mass scope in tundish permanent layer mould material, can effectively reduce the steel-making cost of resistance to material, and use properties is good.
The inventive method be take cheap ferrovanadium slag as main raw material, fluctuation due to ferrovanadium slag chemical composition content, the adding proportion scope of having determined its suitable grain size proportion and different material through a large amount of campaigns can reach it as the optimum performance requirement of tundish permanent layer mould material, also take full advantage of ferrovanadium slag secondary resource, its value is embodied simultaneously.
Mould material of the present invention is prepared into 160mm * 40mm * 40mm size, and performance index requirement is: 110 ℃ * 24h volume density>=2.3g/cm
3, 110 ℃ * 24h compressive strength>=20Mpa, 1500 ℃ * 3h compressive strength>=40Mpa; 110 ℃ * 24h folding strength>=4Mpa, 1500 ℃ * 3h folding strength>=8Mpa; Wherein, the detection of outward appearance adopts range estimation, Al
2o
3measuring method press GB/T6900, the measuring method of refractoriness is pressed GB/T7322, the measuring method of volume density is pressed YB/T5200, the measuring method of cold crushing strength is pressed YB/T5201.
Embodiment 1
Raw material: 90% ferrovanadium slag: mainly contain Al
2o
360%, MgO22%, CaO5%; The ferrovanadium slag that the ferrovanadium slag that 5 < granularity≤10mm ferrovanadium slags account for 30%, 2 < granularity≤5mm accounts for 35%, 0.1 < granularity≤2mm accounts for 15%, and granularity≤0.045mm ferrovanadium slag accounts for 10%; 2% silicon-dioxide: SiO
2> 90%, granularity≤0.075mm; 8% aluminum oxide: Al
2o
3> 99%, granularity≤0.075mm; Account for the Sodium hexametaphosphate 99 of ferrovanadium slag, silicon-dioxide and aluminum oxide gross weight 0.30%;
The preparation of permanent layer: above-mentioned various raw materials are first prepared burden in described ratio, and then agitating-bagging in stirrer, adds water again and stir during use; Described amount of water accounts for 5% of material gross weight; The material being uniformly mixed is poured in the mould of tundish, by vibrating head, to mould material, applies the object that vibration reaches flowing forming; The demoulding after air-set is dry of this mould material, and can come into operation after on-the-spot 250 ℃ * 30h, 750 ℃ * 40h, the baking of 1400 ℃ * 90h;
The mould material that each proportioning raw materials of the present embodiment becomes is made 160mm * 40mm * 40mm size as stated above, and after testing, gained physicochemical property is: 110 ℃ * 24h volume density is 2.5g/cm
3, 110 ℃ * 24h compressive strength 25.12Mpa, 1500 ℃ * 3h compressive strength 55.28Mpa; 110 ℃ * 24h folding strength 5.23Mpa, 1500 ℃ * 3h folding strength 11.20Mpa.
Embodiment 2
Raw material: 85% ferrovanadium slag: mainly contain Al
2o
365%, MgO25%, CaO8%; The ferrovanadium slag that the ferrovanadium slag that 5 < granularity≤10mm ferrovanadium slags account for 20%, 2 < granularity≤5mm accounts for 20%, 0.1 < granularity≤2mm accounts for 30%; Granularity≤0.045mm ferrovanadium slag accounts for 15%; 5% silicon-dioxide: SiO
2> 90%, granularity≤0.075mm; 10% aluminum oxide: Al
2o
3> 99%, granularity≤0.075mm; Account for the Sodium hexametaphosphate 99 of ferrovanadium slag, silicon-dioxide and aluminum oxide gross weight 0.20%;
The preparation of permanent layer: above-mentioned various raw materials are first prepared burden in ratio of the present invention, and then agitating-bagging in stirrer, adds water again and fully stir during use; Described amount of water accounts for 7% of material gross weight; The material being uniformly mixed is poured in the mould of tundish, by vibrating head, to mould material, applies the object that vibration reaches flowing forming; The demoulding after air-set is dry of this mould material, and can come into operation after on-the-spot 200 ℃ * 24h, 800 ℃ * 48h, the baking of 1250 ℃ * 96h;
The mould material that each proportioning raw materials of the present embodiment becomes is made 160mm * 40mm * 40mm size as stated above, and after testing, gained physicochemical property is: 110 ℃ * 24h volume density is 2.6g/cm
3, 110 ℃ * 24h compressive strength 22.12Mpa, 1500 ℃ * 3h compressive strength 60.25Mpa; 110 ℃ * 24h folding strength 5.48Mpa, 1500 ℃ * 3h folding strength 9.86Mpa.
Embodiment 3
Raw material: 75% ferrovanadium slag: Al
2o
3content 75%, MgO20%, CaO9%; The ferrovanadium slag that the ferrovanadium slag that 5 < granularity≤10mm ferrovanadium slags account for 15%, 2 < granularity≤5mm accounts for 10%, 0.1 < granularity≤2mm accounts for 35%; Granularity≤0.045mm ferrovanadium slag accounts for 15%; 7% silicon-dioxide: SiO
2> 90%, granularity≤0.075mm; 18% aluminum oxide: Al
2o
3> 99%, granularity≤0.075mm; Account for the Sodium hexametaphosphate 99 of ferrovanadium slag, silicon-dioxide and aluminum oxide gross weight 0.20%;
The preparation of permanent layer: above-mentioned various raw materials are first prepared burden in ratio of the present invention, and then agitating-bagging in stirrer, adds water again and stir more than 5 minutes during use; Described amount of water accounts for 8% of total material; ; The material being uniformly mixed is poured in the mould of tundish, by vibrating head, to mould material, applies the object that vibration reaches flowing forming; The demoulding after air-set is dry of this mould material, and can come into operation after on-the-spot 150 ℃ * 20h, 850 ℃ * 50h, the baking of 1100 ℃ * 100h;
The mould material that each proportioning raw materials of the present embodiment becomes is made 160mm * 40mm * 40mm size as stated above, and after testing, gained physicochemical property is: 110 ℃ * 24h volume density is 2.58g/cm
3, 110 ℃ * 24h compressive strength 28.18Mpa, 1500 ℃ * 3h compressive strength 60.23Mpa; 110 ℃ * 24h folding strength 6.28Mpa, 1500 ℃ * 3h folding strength 12.36Mpa.
It is 160mm * 40mm * 40mm that existing basket pouring material is prepared sample standard, and after testing, its sample physicochemical property detects and is: 110 ℃ * 24h volume density is 2.35g/cm
3, 110 ℃ * 24h compressive strength 22.5Mpa, 1500 ℃ * 3h compressive strength 48.69Mpa; 110 ℃ * 24h folding strength 4.85Mpa, 1500 ℃ * 3h folding strength 8.42Mpa.
From the indices of embodiment 1,2,3 and existing permanent layer, can find out, the present invention has not only realized the comprehensive utilization of waste resource ferrovanadium slag, and by the permanent layer of preparing after special proportioning, there is erosion-resisting characteristics and the use properties that is better than conventional tundish permanent layer, can effectively reduce the consumption of steel-making tundish refractory materials, there is lower production cost simultaneously, obtained good technique effect.
Claims (5)
1. a tundish permanent layer refractory castable, it is characterized in that: raw material is comprised of the component of following weight per-cent: ferrovanadium slag 75～90%, silicon-dioxide 2～10%, aluminum oxide 3～20%, accounts for the Sodium hexametaphosphate 99 that first three plants raw material gross weight 0.15～0.30%.
2. tundish permanent layer refractory castable according to claim 1, is characterized in that: described ferrovanadium slag is comprised of 5 < granularity≤10mm, 2 < granularity≤5mm, 0.1 < granularity≤2mm and tetra-kinds of specifications of granularity≤0.045mm; Mould material raw material is comprised of the component of following weight per-cent: the ferrovanadium slag 15～30% of 5 < granularity≤10mm, the ferrovanadium slag 10～35% of 2 < granularity≤5mm, the ferrovanadium slag 10～35% of 0.1 < granularity≤2mm, the ferrovanadium slag 10～30% of granularity≤0.045mm, silicon-dioxide 2～10%, aluminum oxide 3～20%, accounts for the Sodium hexametaphosphate 99 that the first six plants raw material gross weight 0.15～0.30%.
3. tundish permanent layer refractory castable according to claim 1 and 2, is characterized in that: the granularity≤0.075mm of described silicon-dioxide, the granularity≤0.075mm of described aluminum oxide.
4. according to the tundish permanent layer refractory castable described in claim 1～3 any one, it is characterized in that: in described ferrovanadium slag, main component is Al
2o
360～75%, MgO20～25%, CaO5～10%.
5. the preparation method of tundish permanent layer, is characterized in that: each raw material of the mould material described in claim 1～4 any one is mixed, then add the water that accounts for raw material gross weight 5～8% to mix, obtain compound; Compound is put into mould seasoning, the demoulding, then at 150～250 ℃, be incubated at 20～30h, 750～850 ℃, to be incubated at 40～50h, 1100～1400 ℃ and be incubated 90～100h.
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|---|---|---|---|
| CN201310683155.5A CN103664212B (en) | 2013-12-12 | 2013-12-12 | Castable refractory for tundish permanent layer and preparation method of permanent layer |
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| CN103664212A true CN103664212A (en) | 2014-03-26 |
| CN103664212B CN103664212B (en) | 2015-05-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130480A (en) * | 2015-10-23 | 2015-12-09 | 攀枝花钢城集团有限公司 | High alumina refractory castable for rotary kiln |
| CN112979329A (en) * | 2021-03-11 | 2021-06-18 | 马鞍山钢铁股份有限公司 | Slag pot trunnion anti-sticking steel sheath formula and manufacturing method thereof |
| CN114315330A (en) * | 2022-02-17 | 2022-04-12 | 攀枝花市银江金勇工贸有限责任公司 | Novel hot-metal bottle permanent layer castable and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367662A (en) * | 2008-09-19 | 2009-02-18 | 攀钢集团研究院有限公司 | Flame-proof pouring material formulated with ferrovanadium slag |
| CN103145435A (en) * | 2013-04-09 | 2013-06-12 | 长兴云峰炉料有限公司 | Vanadium iron slag runner castable |
-
2013
- 2013-12-12 CN CN201310683155.5A patent/CN103664212B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367662A (en) * | 2008-09-19 | 2009-02-18 | 攀钢集团研究院有限公司 | Flame-proof pouring material formulated with ferrovanadium slag |
| CN103145435A (en) * | 2013-04-09 | 2013-06-12 | 长兴云峰炉料有限公司 | Vanadium iron slag runner castable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130480A (en) * | 2015-10-23 | 2015-12-09 | 攀枝花钢城集团有限公司 | High alumina refractory castable for rotary kiln |
| CN112979329A (en) * | 2021-03-11 | 2021-06-18 | 马鞍山钢铁股份有限公司 | Slag pot trunnion anti-sticking steel sheath formula and manufacturing method thereof |
| CN114315330A (en) * | 2022-02-17 | 2022-04-12 | 攀枝花市银江金勇工贸有限责任公司 | Novel hot-metal bottle permanent layer castable and preparation method thereof |
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| CN103664212B (en) | 2015-05-20 |
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