CN1683280A - High heat conductivity carbon brick for blast furnace and its producing method - Google Patents
High heat conductivity carbon brick for blast furnace and its producing method Download PDFInfo
- Publication number
- CN1683280A CN1683280A CN 200410026100 CN200410026100A CN1683280A CN 1683280 A CN1683280 A CN 1683280A CN 200410026100 CN200410026100 CN 200410026100 CN 200410026100 A CN200410026100 A CN 200410026100A CN 1683280 A CN1683280 A CN 1683280A
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- China
- Prior art keywords
- blast furnace
- high heat
- broken
- heat conduction
- roasting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011449 brick Substances 0.000 title claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims description 36
- 229910052799 carbon Inorganic materials 0.000 title abstract description 20
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 21
- 239000010439 graphite Substances 0.000 claims abstract description 21
- 238000001354 calcination Methods 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000654 additive Substances 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 13
- 238000005087 graphitization Methods 0.000 claims description 12
- 239000011294 coal tar pitch Substances 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 14
- 238000001816 cooling Methods 0.000 abstract description 7
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 238000005728 strengthening Methods 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000006227 byproduct Substances 0.000 abstract 1
- 239000003575 carbonaceous material Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Ceramic Products (AREA)
Abstract
The present invention relates to refractory carbon material for iron smelting blast furnace, and is especially high heat conductivity carbon brick for blast furnace lining and its production process. The high heat conductivity carbon brick for furnace lining has material comprising adhesive 20-24 wt%, crushed graphite 40-50 wt%, roasted segment 25-37 wt% and non-carbon additive 1-3 wt%. The main materials are side products from carbon plant, needs no calcining, and results in low cost. Using great amount of crushed graphite makes the carbon brick possess heat conducting coefficient up to 30 W/m.K, and is favorable to strengthening the furnace bottom cooling effect and prolonging blast furnace life.
Description
Technical field:
The present invention relates generally to a kind of iron-smelting blast furnace with carbon refractory and manufacture method thereof, relates in particular to a kind of highly-conductive hot carbon brick and manufacture method thereof that is fit to be used as the blast furnace bottom lining.
Background technology:
Blast furnace is to utilize iron ore-coke reduction method to produce the main equipment of molten iron in the TECHNIQUE TO LARGE INTEGRATED STEEL WORKS.Brick fuel because have that good high-temperature intensity, excellent slag resistance, alkali resistance are good, good heat conductivity and be used as the inner lining material at blast furnace hearth and furnace bottom position.Closely for decades, because the hot repair technology rapid development, hot repair can be realized in the blast furnace stack position, and shaft position properties of refractories no longer determines campaign life.Blast furnace hearth can't realize hot repair, thereby the capability and performance of carbon line is determining campaign life owing to storing red-hot molten iron.Along with modern blast furnace maximizes day by day and realizes the strengthening smelting technology, the blast furnace overhaul expense is improved, prolong blast furnace campaign and become iron work and reduce cost, increase the major objective of benefit, thereby the brick fuel quality has been proposed more and more higher requirement.
Blast furnace whole body from top to bottom all has cooling stave or cooling water tank closely to surround, and furnace bottom has water-cooled tube, the water flowing cooling.If there is not water coolant, blast furnace can not be kept ordinary production in one day, therefore, required to have very high thermal conductivity as the blast furnace carbon brick of blast furnace hearth and bottom lining material, strengthened the refrigerative requirement to satisfy blast furnace.Analyze from the bricking cause for erosion, strengthen cooling, reducing the bricking temperature all has mitigation to multiple cause for erosion.For example alkali-metal enrichment temperature is 900～1200 ℃, if the bricking temperature is reduced to below 900 ℃, basic metal does not just corrode bricking.The erosion of slag, molten iron all is to reduce along with temperature reduces erosive velocity, is to reduce the bricking temperature and improve thermal conductivity, reduces bricking and corrodes valid approach.
The blast furnace carbon brick kind of using has ordinary blast brick fuel, semi-graphite blast furnace carbon brick and blast furnace microporous carbon brick at present, the not enough 14W/m.K of thermal conductivity.
Summary of the invention:
The objective of the invention is to avoid the deficiencies in the prior art part and provide a kind of blast furnace with high heat conduction brick fuel and manufacture method thereof, improve the thermal conductivity of brick fuel, it is reached more than the 30W/m.K.This brick fuel especially is suitable as the blast furnace bottom lining, improves the furnace bottom cooling performance, stablizes blast furnace operating, reaches the purpose that prolongs blast furnace campaign.
Purpose of the present invention can be by realizing by the following technical solutions: a kind of blast furnace is with high heat conduction brick fuel, its proportioning raw materials (weight percent) includes cakingagent 20～24%, broken 25～37%, the non-carbonaceous additive 1～3% of the roasting that the graphite that produces through graphitization process is broken 40～50%, calcining process produces.
Described blast furnace is with high heat conduction brick fuel, and it is characterized in that siccative size composition (weight percent) is: 16～4mm is 20～30%; 4～1mm is 20～30%; 1～0.15mm is 5～10%; ≤ 0.15mm is 40～45%.Siccative is not for comprising other raw material of binding agent.
Described blast furnace is SiC with the non-carbonaceous additive of high heat conduction brick fuel.Cakingagent is a coal-tar pitch.
Blast furnace of the present invention includes with the manufacture method of high heat conduction brick fuel:
(1). will be broken, the broken separated pulverizing of roasting that produces through calcining process through the graphite that graphitization process produces;
(2). screening: by its sizing;
(3). batching:
Broken 25～37%, the non-carbonaceous additive 1～3% of the roasting that the graphite that A produces by its proportioning raw materials (weight percent) cakingagent 20～24%, through graphitization process is broken 40～50%, calcining process produces.
B. by siccative size composition (weight percent) be: 16～4mm is 20～30%; 4～1mm is 20～30%; 1～0.15mm is 5～10%; ≤ 0.15mm is 40～45%.
(4). mix and pinch;
(5). cool material;
(6). extrusion molding or vibratory compaction;
(7). roasting: top temperature is between 1360-1420 ℃, and the residence time is 10-20 hour;
(8). mechanical workout.
The present invention is raw materials used can use Graphite Electrodes (preferably ultra-high power graphite electrode) produce in the broken and blast furnace carbon brick (preferably microporous carbon brick) of the graphite that produces of graphitization process and manufacturing procedure produce in the roasting of calcining process and manufacturing procedure generation broken, raw material is without calcining, with the coal-tar pitch is cakingagent, add a small amount of non-carbonaceous additive SiC, through pulverize, screening, batching, mix pinch, behind the cool material, adopt the method for extrusion molding or vibratory compaction to carry out moulding, under 1360-1420 ℃ of temperature, carry out roasting then, finish through the mechanical workout operation again.
The invention has the beneficial effects as follows,
1. main raw material can use the operation substandard goods of charcoal ink factory, need not calcine, and has saved the raw material calcination process, helps the carbon element factory and makes rational use of resources, and save energy reduces cost.
2. owing to used a large amount of graphite broken in the aggregate, the thermal conductivity of brick fuel has been brought up to more than the 30W/m.K (600 ℃), helps strengthening the furnace bottom cooling performance, prolongs blast furnace campaign.
3. used the macrobead siccative granularity of 16～4mm, the siccative size composition of less use 1～0.5mm has been avoided criticizing useless problem because of the high roasting that may occur of content of graphite in the batching.
4. use the broken and a small amount of non-carbonaceous additive of roasting, improved the hot strength and the dimensional stability under use temperature of brick fuel.
5. blast furnace is better than in the market ordinary blast brick fuel, semi-graphite blast furnace carbon brick and blast furnace microporous carbon brick with the alkali resistance of high heat conduction brick fuel.
Embodiment:
Be described in further detail in conjunction with embodiment shown below:
Embodiment 1:
Blast furnace is as follows with the proportioning raw materials (weight percent) of high heat conduction brick fuel:
Broken through the graphite of graphitization process generation is 40%; The roasting that calcining process produces is broken to be 37%; SiC is 3%; Coal-tar pitch 20%.
Siccative size composition (weight percent) is as follows:
16～4mm is 20%; 4～1mm is 30%; 1～0.15mm is 5%; ≤ 0.15mm is 45%.
Embodiment 2:
Blast furnace is as follows with the proportioning raw materials (weight percent) of high heat conduction brick fuel:
Broken through the graphite of graphitization process generation is 50%; The roasting that calcining process produces is broken to be 25%; SiC is 1%; Coal-tar pitch 24%.
Siccative size composition (weight percent) is as follows:
16～4mm is 30%; 4～1mm is 20%; 1～0.15mm is 10%; ≤ 0.15mm is 40%.
Embodiment 3:
Blast furnace is as follows with the proportioning raw materials (weight percent) of high heat conduction brick fuel:
Graphite broken 45% through the graphitization process generation; The roasting that calcining process produces is broken to be 30%; SiC is 2%; Coal-tar pitch 23%.
Siccative size composition (weight percent) is as follows:
16～4mm is 25%; 4～1mm is 25%; 1～0.15mm is 7%; ≤ 0.15mm is 43%.
Embodiment 4:
Blast furnace of the present invention includes with the manufacture method of high heat conduction brick fuel:
(1). will be broken, the broken separated pulverizing of roasting that produces through calcining process through the graphite that graphitization process produces;
(2). screening: by its sizing;
(3). batching:
A. broken 25～37%, the non-carbonaceous additive 1～3% of the graphite that produces by its proportioning raw materials (weight percent) coal-tar pitch 20～24%, through graphitization process roasting broken 40～50%, that calcining process produces.
B. by its size composition (weight percent) be: 16～4mm is 20～30%; 4～1mm is 20～30%; 1～0.15mm is 5～10%; ≤ 0.15mm is 40～45%.
(4). mix and pinch;
(5). cool material;
(6). extrusion molding or vibratory compaction;
(7). roasting: top temperature between 1360-1420 ℃, residence time 10-20 hour;
(8). mechanical workout.
The present invention is through implementing the tabulation of its physical and chemical index and like product contrast situation
| Sequence number | Index name | Unit | The ordinary blast brick fuel | The semi-graphite blast furnace carbon brick | The blast furnace microporous carbon brick | Blast furnace is with high heat conduction brick fuel |
| 1 | Ash content | ％ | ≤8 | ≤8 | ≤8 | |
| 2 | True density | g/cm 3 | ≥1.90 | ≥1.90 | ≥1.90 | |
| 3 | Volume density | g/cm 3 | ≥1.50 | ≥1.50 | ≥1.54 | ≥1.6 |
| 4 | Apparent porosity | ％ | ≤18.0 | ≤18 | ||
| 5 | True porosity | ％ | ≤20 | ≤20 | ||
| 6 | Compressive strength | MPa | ≥35 | ≥30 | ≥36.0 | ≥30 |
| 7 | Folding strength | MPa | ≥7.8 | ≥8 | ||
| 8 | Air penetrability | mDa | ≤11.0 | ≤70 | ||
| 9 | Oxidation ratio | ％ | ≤16.0 | ≤20 | ||
| 10 | Alkali-resistivity | Estimate | Very (LC) | Excellent (U) or good (LC) | Excellent (U) or good (LC) | Excellent (U) |
| 11 | Molten iron corrosion rate | ％ | 28 | |||
| 12 | Thermal conductivity room temperature 300 600 800 900 | W/m.K | ? ? ? ? ? ≥5.0 | ? ? ? ? ≥7 | ? ? ≥7.0 ≥9.0 ≥10.0 ≥12.0 | ? ? ≥25 ? ≥30 |
From table, can find out that the thermal conductivity of brick fuel brought up to more than the 30W/m.K (600 ℃), help strengthening the furnace bottom cooling performance, prolong blast furnace campaign.
Claims (5)
1. a blast furnace is with high heat conduction brick fuel, broken 25～37%, the non-carbonaceous additive 1～3% of the roasting that the graphite that its proportioning raw materials (weight percent) includes cakingagent 20～24%, produce through graphitization process is broken 40～50%, calcining process produces.
2. blast furnace as claimed in claim 1 is with high heat conduction brick fuel, and it is characterized in that siccative size composition (weight percent) is: 16～4mm is 20～30%; 4～1mm is 20～30%; 1～0.15mm is 5～10%; ≤ 0.15mm is 40～45%.
As claim 1,2 described blast furnaces with high heat conduction brick fuel, it is characterized in that non-carbonaceous additive is SiC.
4. blast furnace as claimed in claim 3 is characterized in that with high heat conduction brick fuel cakingagent is a coal-tar pitch.
5. as claim 1,2 described blast furnaces manufacture method, include with high heat conduction brick fuel:
(1). will be broken, the broken separated pulverizing of roasting that produces through calcining process through the graphite that graphitization process produces;
(2). screening: by its sizing;
(3). batching:
A. broken 25～37%, the non-carbonaceous additive 1～3% of the graphite that produces by its proportioning raw materials (weight percent) cakingagent 20～24%, through graphitization process roasting broken 40～50%, that calcining process produces.
B. by siccative size composition (weight percent) be: 16～4mm is 20～30%; 4～1mm is 20～30%; 1～0.15mm is 5～10%; ≤ 0.15mm is 40～45%.
(4). mix and pinch;
(5). cool material;
(6). extrusion molding or vibratory compaction;
(7). roasting: the top temperature scope is between 1360-1420 ℃, and the residence time is 10-20 hour;
(8). mechanical workout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100261008A CN1304329C (en) | 2004-04-15 | 2004-04-15 | High heat conductivity carbon brick for blast furnace and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100261008A CN1304329C (en) | 2004-04-15 | 2004-04-15 | High heat conductivity carbon brick for blast furnace and its producing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1683280A true CN1683280A (en) | 2005-10-19 |
| CN1304329C CN1304329C (en) | 2007-03-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100261008A Expired - Fee Related CN1304329C (en) | 2004-04-15 | 2004-04-15 | High heat conductivity carbon brick for blast furnace and its producing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1304329C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293207C (en) * | 2005-11-03 | 2007-01-03 | 巩义市神龙耐火材料有限公司 | Heat pressing burnt carbon brick for lining and hearth of iron smelting blast furnace |
| CN102364988A (en) * | 2011-06-09 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Manufacturing method of graphite electrode with phi 700mm ultra high power used in alternating-current (ac) electric arc furnace |
| CN102503483A (en) * | 2011-11-03 | 2012-06-20 | 三门峡三键炭材料科技有限公司 | Carbon brick |
| CN112794724A (en) * | 2021-02-20 | 2021-05-14 | 中冶武汉冶金建筑研究院有限公司 | Directional heat-conducting carbon ramming mass and preparation method thereof |
| CN114380597A (en) * | 2022-01-18 | 2022-04-22 | 中冶南方邯郸武彭炉衬新材料有限公司 | Environment-friendly high-strength carbon brick for blast furnace and preparation method thereof |
| CN120535330A (en) * | 2025-07-25 | 2025-08-26 | 宁德烯铖科技有限公司 | Carbon brick and preparation method thereof, and graphitization furnace |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5532676B2 (en) * | 1974-10-03 | 1980-08-26 | ||
| JPH03205362A (en) * | 1989-12-28 | 1991-09-06 | Kawasaki Refract Co Ltd | Graphite-silicon carbide refractory brick and production thereof |
| CN1143898C (en) * | 2000-10-18 | 2004-03-31 | 叶乐 | High corrosion resistant porous baked carbon brick for lining of blast furnace |
-
2004
- 2004-04-15 CN CNB2004100261008A patent/CN1304329C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1293207C (en) * | 2005-11-03 | 2007-01-03 | 巩义市神龙耐火材料有限公司 | Heat pressing burnt carbon brick for lining and hearth of iron smelting blast furnace |
| CN102364988A (en) * | 2011-06-09 | 2012-02-29 | 中平能化集团开封炭素有限公司 | Manufacturing method of graphite electrode with phi 700mm ultra high power used in alternating-current (ac) electric arc furnace |
| CN102503483A (en) * | 2011-11-03 | 2012-06-20 | 三门峡三键炭材料科技有限公司 | Carbon brick |
| CN112794724A (en) * | 2021-02-20 | 2021-05-14 | 中冶武汉冶金建筑研究院有限公司 | Directional heat-conducting carbon ramming mass and preparation method thereof |
| CN114380597A (en) * | 2022-01-18 | 2022-04-22 | 中冶南方邯郸武彭炉衬新材料有限公司 | Environment-friendly high-strength carbon brick for blast furnace and preparation method thereof |
| CN120535330A (en) * | 2025-07-25 | 2025-08-26 | 宁德烯铖科技有限公司 | Carbon brick and preparation method thereof, and graphitization furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1304329C (en) | 2007-03-14 |
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