CN102757240B - Heating panel used in steel ingot head heat insulation - Google Patents
Heating panel used in steel ingot head heat insulation Download PDFInfo
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- CN102757240B CN102757240B CN 201110104291 CN201110104291A CN102757240B CN 102757240 B CN102757240 B CN 102757240B CN 201110104291 CN201110104291 CN 201110104291 CN 201110104291 A CN201110104291 A CN 201110104291A CN 102757240 B CN102757240 B CN 102757240B
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Abstract
The invention discloses a heating panel used in steel ingot head heat insulation. The steel ingot head heat insulation heating panel is composed of the components of, by weight: 2-6 parts of expanded perlite, 25-35 parts of crushed aluminum powder, 2-6 parts of fluorite, 3-8 parts of metallurgical coke, 3-8 parts of iron ore, 4-9 parts of wheat flour, 3-5 parts of sodium nitrate, 6-10 parts of expandable graphite, 10-15 parts of sawdust, and 3-6 parts of an industrial adhesive. The steel ingot head heat insulation heating panel provided by the invention is advantaged in high calorific value, high maximum temperature after combustion, and long high temperature duration. Therefore, requirements by steel ingot head solidification heat supplementary can be satisfied.
Description
Technical field
The present invention relates to a kind of heating board, relate in particular to a kind of ingot head insulation heating board.
Background technology
Annotate in the steel ingot production process of production line at mould, because the peculiar characteristic of molten steel solidification process, such as dividing the effect of crystallization to produce component segregation owing to choosing, follow the volumetric shrinkage of ingot solidification generation etc., make the head of steel ingot second-rate, in order to improve the head quality of steel ingot, general employing uses the ingot head insulation with heating board steel ingot to be incubated at the head of steel ingot, and then reduces the calorific loss of ingot head.
Ingot head insulation is a kind ofly at high temperature can burn with heating board, and sends the plate object of enough heats after burning.
Yet the conventional ingot head that uses is incubated the curdled appearance that can not guarantee ingot head with heating board at present, and its major cause is: the one, and ingot head is incubated the thermal value deficiency with heating board, and thermal value is less than 1100J/g; The 2nd, the top temperature after the ingot head insulation is burnt with heating board is low, and temperature is less than 1760 ℃; The 3rd, high-temperature duration is short, and the time kept at most 40 minutes, just because of above-mentioned 3 former thereby cause having influenced the molten steel solidification of ingot head to the shortage of heat of steel ingot delivered inside, thereby cause ingot head to have serious segregation and shrinkage cavity loose.
In order to overcome above ingot head insulation with the thermal value deficiency of heating board, the shortcoming that top temperature is low, high-temperature duration is short after the burning, press for a kind of new ingot head insulation of research and development heating board.
Summary of the invention
Topic provides a kind of ingot head insulation heating board between technology to be solved by this invention, and this ingot head insulation is big with the thermal value of heating board, top temperature height, high-temperature duration after burning are long.
The present invention is achieved through the following technical solutions:
Heating board is used in a kind of ingot head insulation, is made up of by weight following component:
Pearlstone 2-6 part;
Pulverize aluminium powder 25-35 part;
Fluorite 2-6 part;
Metallurgical coke 3-8 part;
Iron ore 3-8 part;
Wheat-flour 4-9 part;
SODIUMNITRATE 3-5 part;
Expansible black lead 6-10 part;
Wood chip 10-15 part;
Industry caking agent 3-6 part.
Preferably, heating board is used in a kind of ingot head insulation, is made up of by weight following component:
2 parts of pearlstones;
Pulverize 25 parts of aluminium powders;
6 parts in fluorite;
8 parts of metallurgical cokes;
3 parts of iron ores;
9 parts of wheat-flours;
3 parts of SODIUMNITRATE;
10 parts of expansible black leads;
15 parts of wood chips;
3 parts of industry caking agents.
Preferably, heating board is used in a kind of ingot head insulation, is made up of by weight following component:
6 parts of pearlstones;
Pulverize 35 parts of aluminium powders;
2 parts in fluorite;
3 parts of metallurgical cokes;
8 parts of iron ores;
4 parts of wheat-flours;
5 parts of SODIUMNITRATE;
6 parts of expansible black leads;
10 parts of wood chips;
6 parts of industry caking agents.
Preferably, heating board is used in a kind of ingot head insulation, is made up of by weight following component:
4 parts of pearlstones;
Pulverize 30 parts of aluminium powders;
4 parts in fluorite;
5 parts of metallurgical cokes;
5 parts of iron ores;
7 parts of wheat-flours;
4 parts of SODIUMNITRATE;
8 parts of expansible black leads;
12 parts of wood chips;
5 parts of industry caking agents.
Preferably, described industrial caking agent is epoxy resin glue or resol glue.
In the present invention, the basic introduction of each component and act on as follows:
Pearlstone (SiO
2): meet JC 209-92 pearlstone standard, preferably control SiO
2Mass percentage content is more than 65%.Its apparent density of pearlstone is light, thermal conductivity is low, chemical stability good, wettability power is little, and nontoxic, tasteless, and the ingot head insulation that it is made is light with heating board unit weight, intensity height, good heat insulating.
Pulverize aluminium powder (Al): meet GB/T 2085.3-2009 aluminium powder the 3rd part: pulverize the aluminium powder standard.Pulverizing aluminium powder and airborne oxygen and react, emit a large amount of heats, is that the ingot head insulation one of is originated with the main heating of heating board.
Fluorite (CaF
2): meet YB/T 5217-2005 fluorite standard.Fluorite is as the solvent of compound in the present invention.
Metallurgical coke (C): meet GB/T 1996-2003 metallurgical coke standard.Metallurgical coke one side combustion heating provides heat in the present invention, prolongs fever time simultaneously.
Iron ore (Fe
2O
3): meet GB/T 1361-2008 iron ore analytical procedure general provisions and general provision standard, Fe in the preferred iron ore
2O
3Mass content＞55%.Iron ore is as oxygenant in the present invention.
Wheat-flour: meet GB 1355-1986 wheat-flour standard.Wheat-flour is as the binding agent of compound in the present invention.
SODIUMNITRATE (NaNO
3): meet GB/T 4553-2002 industrial sodium nitrate standard.SODIUMNITRATE is as priming mixture in the present invention.
Expansible black lead (C): meet GB10698-1989 expansible black lead standard, the expansible black lead of preferred national standard trade mark KP500-V.Expansible black lead one side combustion heating provides heat in the present invention, increases the volume of compound simultaneously, makes the ingot head insulation become fluffy with heating board, and internal porosity increases, the performance heat insulating function.
Wood chip: preferably use particle diameter to be the particle wood chip of Φ 0.5-8mm.In being pressed into the process of plate, wood chip plays the effect of the intensity that increases plate, prevents the plate fragmentation.
The industry caking agent: select industry general-purpose industrial caking agent for use, preferred heat curing-type caking agent can be selected commercially available epoxy resin glue, resol glue etc. especially for use.Industrial caking agent plays the bond effect of strengthening compound in the present invention.
Ingot head insulation of the present invention can adopt industry ordinary method to be prepared from heating board, for example takes by weighing above-mentioned each component, mixes, and again through being pressed into plate, can make ingot head insulation heating board of the present invention.
The ingot head insulation heating board that the present invention is made, molten steel smelt finish after, behind header cap oral area position, add when ingot steel casting to the cast operation, ingot head is incubated the effect that is subjected to the molten steel heat with heating board, oxidizing reaction takes place rapidly, additional heat in the ingot mold.Ingot head insulation is also expanded rapidly with heating board itself, forms thermal insulation layer, stops heat to transmit in air, make heat maximum utility that the ingot head insulation sends with heating board to the ingot head transmission.The present invention simultaneously is tabular, and than other powder heating materials, ash content obviously reduces during its burning, has alleviated the pollution to air.
Ingot head insulation heating board of the present invention, utilize the exothermic oxidation reaction of aluminium element and carbon to obtain heat, rational proportion by aluminium element and carbon increases high temperature hold-time and heating total amount simultaneously, be mixed together moulding by in raw material, adding properly mixed metallic aluminium and metallurgical coke and oxygenant iron ore, caking agent etc.During use, under the effect of oxygenant iron ore, metallic aluminium and metallurgical coke generation oxidizing reaction are emitted heat, and ingot head is carried out heat supplement, guarantee the ingot head final set, and the defective that reduces ingot head takes place.
The ingot head insulation that the present invention makes reached more than 40 minutes with the combustion time of heating board, and high-temperature duration reached more than 50 minutes, and top temperature reaches more than 1830 ℃, and thermal value has reached 1900J/g.Ingot head of the present invention insulation is big with the thermal value of heating board, top temperature height, high-temperature duration after the burning are long, can satisfy the needs that ingot head solidifies heat supplement fully.
Embodiment
Further describe the present invention below in conjunction with the present invention of embodiment.
Material choice:
Pearlstone (SiO
2): meet JC 209-92 pearlstone standard, wherein SiO
2Mass percentage content is more than 65%.
Pulverize aluminium powder (Al): meet GB/T 2085.3-2009 aluminium powder the 3rd part: pulverize the aluminium powder standard.
Fluorite (CaF
2): meet YB/T 5217-2005 fluorite standard.
Metallurgical coke (C): meet GB/T 1996-2003 metallurgical coke standard.
Iron ore (Fe
2O
3): meet GB/T 1361-2008 iron ore analytical procedure general provisions and general provision standard, Fe in the iron ore
2O
3Mass content＞55%.
Wheat-flour: meet GB 1355-1986 wheat-flour standard.
SODIUMNITRATE (NaNO
3): meet GB/T 4553-2002 industrial sodium nitrate standard.
Expansible black lead (C): meet GB10698-1989 expansible black lead standard, select the expansible black lead of national standard trade mark KP500-V for use.
Wood chip: selecting particle diameter for use is the particle wood chip of Φ 0.5-8mm.
Industry caking agent: select commercially available epoxy resin glue or resol glue for use.
Embodiment 1
Proportioning raw materials according to table 1 a corresponding embodiment 1 takes by weighing each raw material.Above-mentioned raw materials is mixed, again through being pressed into plate, can make ingot head insulation heating board of the present invention.
Insulation is tested with combustion time, high-temperature duration, top temperature, the thermal value of heating board to the present embodiment ingot head, and concrete data see Table 2.
Embodiment 2
Proportioning raw materials according to table 1 a corresponding embodiment 2 takes by weighing each raw material.Above-mentioned raw materials is mixed, again through being pressed into plate, can make ingot head insulation heating board of the present invention.
Insulation is tested with combustion time, high-temperature duration, top temperature, the thermal value of heating board to the present embodiment ingot head, and concrete data see Table 2.
Embodiment 3
Proportioning raw materials according to table 1 a corresponding embodiment 3 takes by weighing each raw material.Above-mentioned raw materials is mixed, again through being pressed into plate, can make ingot head insulation heating board of the present invention.
Insulation is tested with combustion time, high-temperature duration, top temperature, the thermal value of heating board to the present embodiment ingot head, and concrete data see Table 2.
Table 1: ingot head insulation heating board formula table unit: kilogram
| Raw material | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Pearlstone | 2 | 6 | 4 |
| Pulverize aluminium powder | 25 | 35 | 30 |
| Fluorite | 6 | 2 | 4 |
| Metallurgical coke | 8 | 3 | 5 |
| Iron ore | 3 | 8 | 5 |
| Wheat-flour | 9 | 4 | 7 |
| SODIUMNITRATE | 3 | 5 | 4 |
| Expansible black lead | 10 | 6 | 8 |
| Wood chip | 15 | 10 | 12 |
| Resol glue | 3 | - | 5 |
| Epoxy resin glue | - | 6 | - |
Table 2: ingot head insulation heating board test data table
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative Examples | |
| Combustion time, min | 40 | 45 | 40 | 30 |
| High-temperature duration, min | 55 | 53 | 50 | 38 |
| Top temperature, ℃ | 1870 | 1835 | 1830 | 1750 |
| Thermal value, J/g | 2050 | 1995 | 1900 | 1050 |
Comparative Examples
The commercial ingot head insulation that Baoshan Iron ﹠ Steel Co., Ltd uses is at present tested with combustion time, high-temperature duration, top temperature, the thermal value of heating board, and concrete data see Table 2.
Ingot head insulation of the present invention mainly relies on pulverizing aluminium powder oxidation and metallurgical coke and expansible black lead burning with the combustion heating of heating board, selecting SODIUMNITRATE for use is priming mixture, metallurgical coke and expansible black lead are mainly in the heating in early stage, pulverize the omnidistance heating of aluminium powder, use iron ore to participate in reaction control speed of response, thereby keep high-temperature duration.The increase of pulverizing the aluminium powder amount can guarantee that total calorific value strengthens, and the appropriate proportioning of pulverizing aluminium powder amount, metallurgical coke and expansible black lead guarantees that maximum combustion temperature raises.Ingot head insulation by embodiment 1～3 also can significantly draw with the heating board test data, and with respect to the test data of Comparative Examples, the present invention has long combustion time and high-temperature duration, has higher top temperature and thermal value.
In a word, the present invention can also have multiple conversion and remodeling, is not limited to the concrete structure of above-mentioned embodiment, and protection scope of the present invention should comprise those apparent conversion or alternative and remodeling to those skilled in the art.
Claims (5)
1. heating board is used in an ingot head insulation, it is characterized in that, is made up of by weight following component:
Wherein, Fe in the described iron ore
2O
3Mass content〉55%.
2. heating board is used in ingot head insulation as claimed in claim 1, it is characterized in that, is made up of by weight following component:
3. heating board is used in ingot head insulation as claimed in claim 1, it is characterized in that, is made up of by weight following component:
4. heating board is used in ingot head insulation as claimed in claim 1, it is characterized in that, is made up of by weight following component:
5. use heating board as each described ingot head insulation in the claim 1～4, it is characterized in that: described industrial caking agent is epoxy resin glue or resol glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110104291 CN102757240B (en) | 2011-04-25 | 2011-04-25 | Heating panel used in steel ingot head heat insulation |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN 201110104291 CN102757240B (en) | 2011-04-25 | 2011-04-25 | Heating panel used in steel ingot head heat insulation |
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| CN102757240A CN102757240A (en) | 2012-10-31 |
| CN102757240B true CN102757240B (en) | 2013-09-04 |
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| CN106180599B (en) * | 2016-08-20 | 2018-10-19 | 靖江市周浦新材料有限公司 | A kind of preparation process of molding composite heating plate |
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|---|---|---|---|---|
| CN1007044B (en) * | 1986-02-03 | 1990-03-07 | 中国科学院化工冶金研究所 | Melted metal surface heat-generating isolation agent |
| CN86106654A (en) * | 1986-10-08 | 1988-04-20 | 长春市有色合金厂 | Combined shrinkage cavity-proof plate |
| CN1008798B (en) * | 1987-11-04 | 1990-07-18 | 唐国进 | Exothermic, slag trapping and insulating covering agent |
| CN1327994C (en) * | 2005-03-22 | 2007-07-25 | 浙江湖州红鹰企业集团有限公司 | Heat preservation agent in use for molded casting, and producing technique |
| CN101642799B (en) * | 2009-08-19 | 2012-12-05 | 西峡县鑫龙保温材料有限公司 | Molded cap ball composite heating agent and production process thereof |
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