CN1869568A - Low thermal resistance cast-iron cooling wall and manufacturing method thereof - Google Patents
Low thermal resistance cast-iron cooling wall and manufacturing method thereof Download PDFInfo
- Publication number
- CN1869568A CN1869568A CN 200610039213 CN200610039213A CN1869568A CN 1869568 A CN1869568 A CN 1869568A CN 200610039213 CN200610039213 CN 200610039213 CN 200610039213 A CN200610039213 A CN 200610039213A CN 1869568 A CN1869568 A CN 1869568A
- Authority
- CN
- China
- Prior art keywords
- cooling
- cooling wall
- cast
- iron
- pure copper
- 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
Images
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Blast Furnaces (AREA)
Abstract
The invention relates to a new type low thermal resistance cast iron cooling wall. The feature is that the identity material of cooling wall is nodular cast iron or gray cast iron and the cooling water channel in cooling wall is made up from pure copper. The clearance between the cooling wall identity and the outer wall of pure copper pipeline is below 0.1mm. The manufacture method includes the following steps: fixing the molded pure copper pipeline into the sand box; casting by molten iron of nodular cast iron or gray cast iron, and taking inertia vapor cooling to copper pipeline to molding. The invention eliminates the thermal resistance caused by anti seepage carbon coating layer to make the heat exchange efficiency sharply increase and prolong the useful life of cooling wall.
Description
Technical field
Technical field under the present invention is the body of heater cooling technology of high temperature stoves such as blast furnace and other metallurgical furnaces, heating furnace, combustion furnace, relates to a kind of novel low thermal resistance cast-iron cooling wall of new construction, and the manufacture method of this cooling wall.
Background technology
The body of heater of high temperature stoves such as blast furnace and other metallurgical furnaces, heating furnace, combustion furnace all needs cooling technology, and cooling wall (device) promptly is set in the furnace wall.The material of traditional cooling wall (device) mainly contains spheroidal graphite cast-iron, casting pig, mild steel and fine copper cooling wall, all cooling-water duct will be set in the cooling wall of any material (device).Except the fine copper cooling wall, the cooling-water duct in the cooling wall of other material all uses the seamless steel pipe of low-carbon steel material.
1. cast-iron cooling wall
Cast-iron cooling wall in order to prevent the carburizing to cooling water pipe, must be coated anti-carburization coating at the outer surface of seamless steel pipe on the manufacturing process of cooling wall in manufacture process, and then carries out the cast of foundry goods; Because of the difference of two kinds of material thermal coefficient of expansions, cooling water pipe and cooling wall body must leave the air gap simultaneously.Since the air gap between the coating between cooling water pipe and the cast iron and coating and cast iron (or claiming air cleft) thus existence reduced the heat transfer and the cooling effect of cooling wall significantly, accelerated the damage process of cooling wall.
2. cast steel cooling wall
Cast steel cooling wall is because its body material is a mild steel, therefore cooling water pipe can not removed the anti-carburization coating of low heat conduction by carburizing in manufacture process, simultaneously because cooling wall body material is identical with the cooling water pipe material, need not specially leave the expansion clearance, therefore improve the overall thermal conductivity energy of cooling wall.But the material of cooling water pipe still is a mild steel, and steel pipe inwall ratio is easier to generate incrustation scale.
3. cooling water pipe
Except the fine copper cooling wall, the cooling water pipe in the cooling wall all is the mild steel seamless pipe.The cooling medium that is used for cooling wall mainly is the circulation of open circuit cooling water, the circulation of preliminary treatment cooling water, soft water inclosed recirculated cooling water, pure water sealing and circulating.Cooling water quality is good, and is just slow at the scale velocity of cooling water pipe inwall.But no matter use which type of cooling medium inevitably will produce fouling at the cooling water pipe inwall.Use open circuit recirculated water to be: A3 steel＞20 steel＞brass＞fine copper＞stainless steel＞aluminium to the scale velocity of unlike material; Use the scale velocity of preliminary treatment recirculated water unlike material to be: 20 steel＞A3 steel＞aluminium＞fine copper＞brass＞stainless steel.The thermal conductivity factor of incrustation scale is 1.6～1.8W/mk, only is 1/24～1/30 of original material, and the cooling water pipe interior wall construction causes cooling water heat exchange amount to reduce significantly with the cooling wall body temperature rising significantly, finally quicken the damage process of cooling wall.
Summary of the invention
At above-mentioned three deficiencies of conventional art, the novel low thermal resistance cast-iron cooling wall that the purpose of this invention is to provide a kind of new construction substitutes above cooling wall (device), and this new type cooling stave is made of spheroidal graphite cast-iron or casting pig; The cooling water pipe material is selected fine copper material seamless pipe, and therefore the cooling water pipe outer surface does not need to spray anti-carburization coating when making, and has eliminated the thermal resistance that anti-carburization coating brought; And the cooling duct material in the cooling wall is the pure copper tube of high thermal conductivity material, increased considerably the overall thermal conductivity energy of cooling wall, thereby be the efficient cooling wall of a kind of brand-new low thermal resistance, all can adopt this novel cast-iron cooling wall (device) to replace traditional cooling wall at blast-furnace shaft and other kiln all sites, prolong the life of the blast furnace and improve the blast furnace productivity effect.The present invention simultaneously will provide the manufacture method of this new construction cooling wall.
The technical scheme of finishing the foregoing invention task is: novel low thermal resistance cast-iron cooling wall is characterized in that: cooling wall body material is the spheroidal graphite cast-iron or the casting pig of high-melting-point (〉=1200 ℃), cooling-water duct in the cooling wall is made of low melting point (1080 ℃) pure copper tube, and key problem in technology will guarantee that low-melting pure copper tube is not by burn through and fusing when the cast cooling wall.
1. described cooling water pipe is the pure copper tube of impervious carbon, high thermal conductivity (340 kilocalories/meter time ℃), high-elongation (〉=30);
2. the gap between cooling wall body and the pure copper tube outer wall is less than 0.1mm;
3. described pure copper tube is selected the pure copper tube of 6～8mm wall thickness for use.
Because the molten iron temperature of spheroidal graphite cast-iron and casting pig is at 1300～1380 ℃, and 1083 ℃ of the fusing points of fine copper, if adopt traditional casting method, pure copper tube will water fashionable the thawing at molten iron, can't produce cooling wall of the present invention.The application provides following technology,
The manufacture method of novel low thermal resistance cast-iron cooling wall:
It is fixing that the pure copper tube of typing is put into the sandbox that need make according to the cooling wall external form;
When pouring into a mould, the pure copper tube of being poured into a mould is carried out the cooling of inerting steam, cast molding with the molten iron of spheroidal graphite cast-iron or casting pig.
Above-described " pure copper tube is carried out the cooling of inerting steam " can adopt following method:
1. the molten iron heat was evenly distributed when cast gate was also noted that casting as rising head except considering the feeding effect;
2. at the chill of the arranged around some that is cast into copper pipe, reduce the wash away fusing effect of high temperature liquid iron to pure copper tube;
3. in casting process, the pure copper tube that is cast into is passed to low amounts of water, make it in the copper pipe that is heated by high temperature liquid iron, produce a large amount of heats of vapor absorption and reduce the resulting heat of copper pipes, reduce the temperature of copper pipe and prevent the copper pipe fusing;
According to the copper pipe cross section water yield is controlled at 0.5～2.0kg/min; The water yield of this patent is controlled at 0.8kg/min;
4. for all parts to the even cooling copper tube of steam of water flowing generation in the copper pipe, must feed inert gas in water flowing, one can prevent that steam from accumulating in pure copper tube, and two can prevent the oxidation of casting process high temperature to copper pipe;
The inert gas that this patent is recommended to adopt is a nitrogen; The flow velocity of inert gas is controlled at 8～15m/s.
Novel low thermal resistance cast-iron cooling wall provided by the invention and manufacture method thereof have been improved the structure and the casting technique of traditional blast furnace cooling stave, and the pure copper tube that is cast into impervious carbon, high thermal conductivity (340 kilocalories/meter time ℃), high-elongation (〉=30), slow fouling in cast iron quality is as the cooling water water pipe; Eliminated the thermal resistance that anti-carburization coating brings, thereby cooling water is increased the heat exchange efficiency of cooling wall body; Use its encrustation of fine copper cooling water pipe to slow down simultaneously, further improve the overall thermal conductivity energy of cast-iron cooling wall, prolong the life-span of cast-iron cooling wall.
Description of drawings
Fig. 1, Fig. 2 are respectively the cutaway view and the vertical view of structural representation of the present invention;
Fig. 3 casts sandbox and cast gate schematic diagram for the present invention.
The specific embodiment
Embodiment 1,
Novel low thermal resistance cast-iron cooling wall, and its manufacturing process (control intensity of cooling casting technique), referring to Fig. 1～Fig. 3:
Novel low thermal resistance cast-iron cooling wall: cooling wall body 1 material is the spheroidal graphite cast-iron or the casting pig of high-melting-point (〉=1200 ℃), and the cooling-water duct 2 in the cooling wall is made of low melting point (1080 ℃) pure copper tube.Cooling water pipe is the pure copper tube of impervious carbon, high thermal conductivity (340 kilocalories/meter time ℃), high-elongation (〉=30); Gap between cooling wall body and the pure copper tube outer wall is less than 0.1mm; Pure copper tube is selected the pure copper tube of 6～8mm wall thickness for use.
Preparation method's step of above structure is as follows:
It is fixing that the pure copper tube of typing is put into the sandbox 3 that need make according to the cooling wall external form;
When pouring into a mould, the pure copper tube of being poured into a mould is carried out the cooling of inerting steam, cast molding with the molten iron of spheroidal graphite cast-iron or casting pig.
Above-described " pure copper tube is carried out the cooling of inerting steam " adopts following method:
Employing drenches with rain and casts cast gate, is dispersed in the both sides that are cast into copper pipe length.The molten iron heat was evenly distributed when cast gate was also noted that casting as rising head except considering the feeding effect.
In order to prevent that pure copper tube is melted in the casting process, so at first will reduce the wash away fusing effect of high temperature liquid iron at the chill of the arranged around some that is cast into copper pipe to pure copper tube.
In cast with the inert gas and the water flowing that feed copper pipe, water enters in the copper pipe that is heated by molten iron in the casting process back and produces steam and absorb the heat that high temperature liquid iron is transmitted to copper pipe with this and prevent that copper pipe is melted, and according to the copper pipe cross section water yield is controlled at 0.5～2.0kg/min.The present embodiment water yield is controlled at 0.8kg/min.
According to the temperature of when casting pouring molten iron, before beginning cast, pass to inert gas (as nitrogen) in to copper pipe, the flow velocity of inert gas is controlled at 8～15m/s.
Behind casting finished product excision cast gate, the rising head, to the copper pipe inner surface treatment.
The principle of novel low thermal resistance cast-iron cooling wall casting technique and points for attention:
1, the key of casting technique is must the copper pipe that be cast into be cooled off, when not taking any measure casting-cooling wall, because the liquid steel temperature of cast is much larger than the fusion temperature that is cast into copper pipe, even the thermal capacity of its molten iron also is enough to melt the fine copper cooling water pipe that is cast into behind the molten steel solidification.Therefore in casting process, must pass to low amounts of water, make it in the copper pipe that is heated by high temperature liquid iron, produce a large amount of heats of vapor absorption and reduce the resulting heat of copper pipes, that is to say the temperature that reduces copper pipe and prevent that copper pipe from melting the pure copper tube that is cast into.
2, simultaneously for all parts to the even cooling copper tube of steam of water flowing generation in the copper pipe, in water flowing, must feed inert gas, the inert gas that this patent uses is a nitrogen, and logical together inert gas also prevents the oxidation of copper pipe inwall in casting process in the time of to the copper pipe water flowing in the casting process.
At the logical simultaneously inert gas of an end and the water of copper pipe, the other end of copper pipe must guarantee the mist discharging of inert gas and water vapour without any obstruction when 3, casting, and prevents that the mixed cooling gas body from accumulating in the inner security incident that produces of copper pipe.
Claims (7)
1, a kind of novel low thermal resistance cast-iron cooling wall is characterized in that, cooling wall body material is made of spheroidal graphite cast-iron or casting pig, and the cooling-water duct in the cooling wall is made of pure copper tube.
According to the described novel low thermal resistance cast-iron cooling wall of claim 1, it is characterized in that 2, described pure copper tube is the pure copper tube that adopts impervious carbon, high thermal conductivity, high-elongation, slow fouling.
According to the described novel low thermal resistance cast-iron cooling wall of claim 1, it is characterized in that 3, the gap between described cooling wall body and the pure copper tube outer wall is less than 0.1mm.
4, according to claim 1 or 2 or 3 described blast furnace low thermal resistance cast-iron cooling walls, it is characterized in that described pure copper tube is selected the pure copper tube of 6～8mm wall thickness for use.
5, the manufacture method of the described novel low thermal resistance cast-iron cooling wall of a kind of claim 1 the steps include:
It is fixing that the pure copper tube of typing is put into the sandbox that need make according to the cooling wall external form;
When pouring into a mould, the pure copper tube of being poured into a mould is carried out the cooling of inerting steam, cast molding with the molten iron of spheroidal graphite cast-iron or casting pig.
According to the manufacture method of the low thermal resistance cast-iron cooling wall of the described blast furnace of claim 5, it is characterized in that 6, described " pure copper tube is carried out the cooling of inerting steam " is meant one or more in the following method:
The molten iron heat was evenly distributed when cast gate was also noted that casting as rising head except considering the feeding effect;
At the chill of the arranged around some that is cast into copper pipe, reduce the wash away fusing effect of high temperature liquid iron to pure copper tube;
In casting process, the pure copper tube that is cast into is passed to low amounts of water, make the water generation steam that is heated;
In water flowing vaporization cooling, feed inert gas and prevent that the copper pipe inwall is by high-temperature oxydation.
7, according to the manufacture method of the described novel low thermal resistance cast-iron cooling wall of claim 6, it is characterized in that:
The flow velocity of inert gas is controlled at 8～15m/s;
The water yield is controlled at 0.5～2.0kg/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100392130A CN100457923C (en) | 2006-03-31 | 2006-03-31 | Low thermal resistance cast-iron cooling wall and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100392130A CN100457923C (en) | 2006-03-31 | 2006-03-31 | Low thermal resistance cast-iron cooling wall and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1869568A true CN1869568A (en) | 2006-11-29 |
| CN100457923C CN100457923C (en) | 2009-02-04 |
Family
ID=37443298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100392130A Expired - Fee Related CN100457923C (en) | 2006-03-31 | 2006-03-31 | Low thermal resistance cast-iron cooling wall and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100457923C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465290C (en) * | 2007-01-12 | 2009-03-04 | 汕头华兴冶金备件厂有限公司 | Laminated cooling walls |
| CN102021257A (en) * | 2010-12-30 | 2011-04-20 | 安阳钢铁股份有限公司 | Casting method of nodular cast iron cooling wall with thick cross section and high elongation |
| CN102109278A (en) * | 2010-12-15 | 2011-06-29 | 中国瑞林工程技术有限公司 | Method for manufacturing cooling water jacket and cooling water jacket for high temperature furnace |
| CN102367498A (en) * | 2011-11-15 | 2012-03-07 | 攀枝花钢铁有限责任公司机械制造分公司 | Anti-carburizing construction process for casting cooling water pipe in blast furnace cooling wall |
| CN102407318A (en) * | 2011-10-13 | 2012-04-11 | 金川集团有限公司 | Buried pipe type copper water jacket casting process |
| CN102909346A (en) * | 2012-11-02 | 2013-02-06 | 徐宏亮 | Casting method of casting imbedded with special-shaped pipeline |
| CN107254559A (en) * | 2017-06-30 | 2017-10-17 | 马鞍山市润通冶金材料有限公司 | A kind of cooling wall and its processing method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107083A (en) * | 1994-11-02 | 1995-08-23 | 本溪钢铁公司 | Casting method of casting steel cooling wall in blast furnace |
| CN1190503C (en) * | 2000-06-14 | 2005-02-23 | 鞍山钢铁集团公司 | Cooling wall of blast furnace and its making technology |
| CN2479025Y (en) * | 2001-01-05 | 2002-02-27 | 张勇 | Copper core composite cooling wall for blast furnace |
| CN2611385Y (en) * | 2003-03-14 | 2004-04-14 | 漯河中贯冶金机械有限公司 | Copper cooling wall of water paper |
-
2006
- 2006-03-31 CN CNB2006100392130A patent/CN100457923C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100465290C (en) * | 2007-01-12 | 2009-03-04 | 汕头华兴冶金备件厂有限公司 | Laminated cooling walls |
| CN102109278A (en) * | 2010-12-15 | 2011-06-29 | 中国瑞林工程技术有限公司 | Method for manufacturing cooling water jacket and cooling water jacket for high temperature furnace |
| CN102021257A (en) * | 2010-12-30 | 2011-04-20 | 安阳钢铁股份有限公司 | Casting method of nodular cast iron cooling wall with thick cross section and high elongation |
| CN102407318A (en) * | 2011-10-13 | 2012-04-11 | 金川集团有限公司 | Buried pipe type copper water jacket casting process |
| CN102367498A (en) * | 2011-11-15 | 2012-03-07 | 攀枝花钢铁有限责任公司机械制造分公司 | Anti-carburizing construction process for casting cooling water pipe in blast furnace cooling wall |
| CN102367498B (en) * | 2011-11-15 | 2013-05-15 | 四川鸿舰重型机械制造有限责任公司 | Anti-carburizing construction process for casting cooling water pipe in blast furnace cooling wall |
| CN102909346A (en) * | 2012-11-02 | 2013-02-06 | 徐宏亮 | Casting method of casting imbedded with special-shaped pipeline |
| CN107254559A (en) * | 2017-06-30 | 2017-10-17 | 马鞍山市润通冶金材料有限公司 | A kind of cooling wall and its processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100457923C (en) | 2009-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1869568A (en) | Low thermal resistance cast-iron cooling wall and manufacturing method thereof | |
| CN101634520B (en) | Casting method of cast steel cooling plate | |
| CN103320554B (en) | Device and method for dry-method treatment for and sensible heat recovery of high-temperature molten slag | |
| KR890004532B1 (en) | Stave cooler and its manufacturing method | |
| CN108866427A (en) | The manufacturing method of large section low-temperature high-toughness Ferrite nodular iron casting | |
| CN105598389A (en) | Process for casting seal rainproof complex flanges | |
| KR20010101877A (en) | Casting mould for manufacturing a cooling element and cooling element made in said mould | |
| CN101348846A (en) | Blast furnace-intermediate frequency furnace duplexing smelting short process production technology | |
| CN103615901B (en) | The production method of slag runner cooler | |
| CN102618732B (en) | Continuous multistage refining and degassing keeping furnace for molten aluminum | |
| CN110508758A (en) | The block cast method of more sealing air flue inner casing casting | |
| CN114182161A (en) | Method for producing high-nitrogen high-manganese steel by quickly solidifying molten steel and inhibiting nitrogen from escaping | |
| CN206286499U (en) | Composite graphite chill | |
| CN1190503C (en) | Cooling wall of blast furnace and its making technology | |
| CN200996792Y (en) | Low-thermal resistance cast-iron cooling wall | |
| CN102776433A (en) | Reinforced composite post inoculation technology for short-flow smelting | |
| CN106735039B (en) | A kind of bimetal centrifugal is cast the control method of compound inner tube layer stress | |
| CN1544185A (en) | Manufacturing method of buried pipe type copper cooling part | |
| CN201545856U (en) | Cast steel slag trench cooler with water cooling | |
| CN115351258A (en) | Cooling water pipe embedded type chilling block and casting method and application thereof | |
| CN114682751B (en) | Horizontal continuous casting device and casting process based on high silicon aluminum alloy | |
| CN106001469A (en) | Horizontal continuous casting crystallizer of cast iron and preparing method of cast iron proximate matter | |
| CN201421266Y (en) | Cast steel cooling plate | |
| CN116274861A (en) | Riser-free casting process of large-tonnage mold clamping force thick large-section injection molding machine template casting | |
| CN221797584U (en) | Blast furnace ironmaking tuyere device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NANJING NANGANG INDUSTRY DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: NANJING UNITE STEEL CO., LTD. Effective date: 20091120 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091120 Address after: Liuhe District of Nanjing City, Jiangsu Province, xiejiadian Patentee after: Nanjing Iron & Steel United Co., Ltd. Address before: Jiangsu city of Nanjing province Dachang xiejiadian Patentee before: Nanjing Iron & Steel United Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 Termination date: 20140331 |