WO2019192074A1 - High-efficient long-life pre-perforating pipe cast iron cooling wall and manufacturing process therefor - Google Patents

High-efficient long-life pre-perforating pipe cast iron cooling wall and manufacturing process therefor Download PDF

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Publication number
WO2019192074A1
WO2019192074A1 PCT/CN2018/091195 CN2018091195W WO2019192074A1 WO 2019192074 A1 WO2019192074 A1 WO 2019192074A1 CN 2018091195 W CN2018091195 W CN 2018091195W WO 2019192074 A1 WO2019192074 A1 WO 2019192074A1
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WIPO (PCT)
Prior art keywords
water pipe
pipe
cast iron
steel pipe
cooling wall
Prior art date
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PCT/CN2018/091195
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French (fr)
Chinese (zh)
Inventor
于国华
朱天喜
亓玉敏
张向国
韩喜峰
辛虹霓
Original Assignee
莱芜市天铭冶金设备有限公司
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Publication of WO2019192074A1 publication Critical patent/WO2019192074A1/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4646—Cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/24—Cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/0045—Cooling of furnaces the cooling medium passing a block, e.g. metallic

Definitions

  • the invention relates to the technical field of metallurgical equipment, in particular to a manufacturing process of an efficient and long-life pre-pierced cast iron stave.
  • the cast iron stave that is used at home and abroad is often damaged by water leaking from the cooling wall, which causes the cooling wall to lose cooling capacity and affect the production safety of the blast furnace.
  • the thin-walled metal bellows can be remedied in the damaged stave pipe to ensure the water-cooling capacity of the pipe and restore the function of the stave.
  • the metal bellows after remediation has a poor cooling effect, and the service life is generally 1-5 months, and the water flow resistance is large, the energy consumption is increased, and the on-site operation is difficult and the construction cost is high.
  • the water pipe that can be taken through the thin-walled metal bellows is limited to the simple shape of the U-shaped pipe, and the cast-in water pipe is a complex serpentine tube because the metal can not be worn. Corrugated pipe measures are directly discarded, affecting the safe production of ironmaking blast furnaces.
  • the existing cast iron stave used at home and abroad is to ensure that the elongation of the cast steel pipe is not reduced, and a ceramic anti-carburizing coating of about 0.2 mm must be applied on the surface of the water pipe to cause a coating thermal barrier. Because of the existence of ceramic anti-seepage carbon coating, during the solidification process of molten iron, a 0.3 mm air gap layer is formed between the cooling wall body and the water pipe to form an air gap thermal barrier, which seriously reduces the thermal conductivity of the cooling wall and enables cooling.
  • the wall body is in a high temperature state for a long time in use, because the cast iron stave has poor thermal shock resistance, especially at high temperatures, the high temperature mechanical properties of the cast iron drop sharply, causing premature cracking, spalling, erosion and damage of the stave body.
  • the water pipe loses the cooling function, causing the cooling wall to fail and affecting the normal and safe production of the blast furnace.
  • the invention aims at the deficiencies of the prior art, and provides an efficient and long-life pre-wearing tube cast iron stave and a manufacturing process thereof, to solve the problem that the cast iron cooling wall cast water pipe in the background art is damaged after being used in the blast furnace, or because the metal pipe cannot be remedy
  • the stave is directly scrapped, or the service life is too short due to penetration into the thin-walled metal bellows, which does not extend the service life of the cast iron stave.
  • the main body of the stave is too high in temperature, and the substrate cracks, falls off, and is eroded by the blast furnace slag.
  • the present invention provides an efficient long-life pre-pierced cast iron stave comprising a cast iron stave body and a pre-pierced water pipe, the pre-passing pipe comprising an outer steel pipe cast into the stave body and pre-exposed in the outer steel pipe
  • An inner water pipe that is penetrated, and the inner water pipe is a seamless steel pipe or a copper pipe or a stainless steel pipe.
  • the outer steel pipe cast into the stave body of the present application is inserted into the inner water pipe before the elbow, and the inner water pipe is a smooth steel pipe or a copper pipe or a stainless steel pipe. Since the pre-passing water pipe has a two-layer structure, even if the outer wall water pipe is damaged under the long-term high temperature condition of the cooling wall, the inner water pipe maintains the normal cooling function, and the service life of the cooling wall is prolonged.
  • the utility model overcomes the defects that the conventional cooling wall re-insers the thin-walled metal bellows in the damaged water pipe after the cooling water pipe is broken, has the advantages of poor cooling effect, short life, high cost and difficulty in operation, and wears a thin wall after the damage of the cooling wall is used.
  • the metal bellows remedy the cooling wall provided by the present application in the outer steel pipe before the casting into the smooth seamless pipe, improves the reliability of the cooling wall and prolongs the service life of the cooling wall.
  • the arrangement of the present application also eliminates the damage that the serpentine water pipe in the cooling wall can no longer penetrate into the thin-walled metal bellows, thereby causing the cooling wall to be directly scrapped, which seriously affects the disadvantages of the safe production of the blast furnace.
  • the pre-through water pipe provided by the present application is pre-punched into the inner water pipe in the outer steel pipe and then bent according to the requirements of the cooling wall.
  • the outer surface of the outer steel tube is provided with a metal nano-transition layer, and the metal nano-transition layer has a thickness of 5 to 50 ⁇ m.
  • the metal nano-transition layer comprises the following components by mass: nano nickel: 70-80 parts, nano copper: 20-30 parts, nano boron: 1-2 parts, nano silicon: 1-2 parts, Nano rare earth lanthanum: 0.05-0.1 parts.
  • the arrangement of the metal nano-transition layer can prevent the carbon of the cast iron body from penetrating into the outer steel tube on the one hand, and can form a metallurgical bond between the cast iron body and the outer tube of the pre-piercing tube on the other hand, and eliminate the coating formed by the ceramic coating of the conventional stave.
  • the thermal barrier formed by the thermal barrier and the air gap layer increases the overall thermal conductivity of the cooling wall of the present application by more than three times than that of the conventional cooling wall.
  • the present invention provides a manufacturing process for an efficient and long-life pre-pierced cast iron stave for manufacturing the above-described high-efficiency long-life pre-pierced cast iron stave, the manufacturing process comprising the following steps:
  • the solid cooling medium comprising the following components by mass: 70-60 mesh ore sand 70-90 parts, lime powder 5-10 parts, vermiculite powder 5- 10 parts; the addition of the solid cooling medium serves as a cooling function to prevent the pre-through water pipe from melting.
  • the solid cooling medium fills the interior of the pre-filled water pipe to prevent deformation of the pre-through water pipe.
  • a metal nano-transition layer is sprayed or brushed on the outer surface of the outer steel tube.
  • the ceramic coating on the outer surface of the conventional conventional stave pipe is usually 0.2 mm, the carburized layer is on the surface of the water pipe, and the thickness of the carburized layer is usually 0.1 mm. Due to the arrangement of the ceramic coating, there is a gap between the water pipe and the stave body. An air gap layer is formed, and the thickness of the air gap layer is generally 0.3 mm.
  • the high-efficiency long-life pre-pierced cast iron cooling wall manufactured by the method of the present application has a metal nano-coating of 5-50 ⁇ m on the outer surface of the outer steel tube, and the metal nano-coating layer is provided so that the outer steel pipe surface has no carburized layer.
  • the inner water pipe is a smooth water pipe
  • the smooth water pipe is a seamless steel pipe or a copper pipe or a stainless steel pipe.
  • the outer tube of the pre-through pipe is a steel pipe
  • the inner pipe is a steel pipe
  • the outer pipe is a steel pipe
  • the inner pipe is a copper pipe
  • the outer pipe is a steel pipe
  • the inner pipe is a stainless steel pipe.
  • the outer tube of the pre-through water pipe has a wall thickness of 1-10 mm
  • the inner layer water pipe has a wall thickness of 1-10 mm.
  • the casting temperature is 1280-1370 °C.
  • the wall thickness of the pre-filled water pipe and the casting temperature in the present application are synergistic and synergistic, and the casting temperature is very important for the formation of the cooling wall.
  • the present application has been subjected to multiple optimization experiments, using the pre-wearing pipe of the above thickness and When the above temperature is cast, the obtained pre-through tube stave has the best performance.
  • the high-efficiency long-life pre-pierced cast iron stave provided by the present application maintains the normal cooling function of the inner water pipe even if the outer wall of the stave is damaged under the long-term high temperature condition, so that the service life of the stave is prolonged.
  • the present application uses a pre-filled water pipe, and the outer surface of the outer steel pipe pre-passing the water pipe is coated with a nano metal coating, which prevents the carbon of the cast iron body from penetrating the outer surface of the steel pipe and the nano metal coating at a high temperature.
  • the atomic diffusion forms a metallurgical bond between the stave body and the outer water pipe, eliminating the thermal barrier formed by the ceramic coating of the conventional stave and the air gap thermal barrier formed by the air gap layer, so that the stave of the present application is more conventional than the stave
  • the thermal conductivity is improved by more than 3 times, the hot surface temperature of the stave is lowered, the corrosion resistance is improved, and the service life of the stave is prolonged.
  • the inner water pipe is the cooling wall of the copper pipe. After the outer wall of the cooling wall is damaged, since the inner pure copper pipe elongation is more than three times that of the steel pipe, crack damage is extremely difficult, and because the thermal conductivity of pure copper is steel. More than 10 times, even if the copper tube is exposed in the slag iron environment, the copper tube slag skin is extremely strong in regenerating ability, and it is easy to hang the slag. The inner layer copper tube is extremely difficult to be broken due to the melt loss under the protection of the slag skin.
  • the inner water pipe is the cooling wall of the stainless steel pipe. After the outer steel pipe of the cooling wall is damaged, the inner stainless steel pipe continues to exert cooling effect, and after the hot water is removed from the hot surface of the cooling wall body, the chemical resistance of the stainless steel is much higher. Yupu carbon steel, so the longer life of the carbon steel pipe, continue to play the cooling function.
  • the inner water pipe is the cooling wall of the steel pipe. After the outer steel pipe of the cooling wall is damaged, the inner steel pipe continues to exert cooling effect, which prolongs the life of the cooling wall by more than one time, and avoids unreliable on-site pipe-piercing operation after the cooling water pipe is damaged. Or because the shape of the water pipe is complicated and cannot be piped, the cooling wall is scrapped.
  • FIG. 1 is a schematic view showing the overall structure of an efficient and long-life pre-pierced cast iron cooling wall according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a water pipe for an efficient and long-life pre-pierced cast iron cooling wall according to an embodiment of the present invention.
  • the stave body 1 Shown in the figure: the stave body 1, the water pipe 2, the outer steel pipe 21, and the inner water pipe 22.
  • the conventional conventional cast iron stave has a heat flow intensity of 65.83 (Kw/m 2 ), a hot surface temperature of 960 ° C, and a cold surface temperature of 213 ° C when the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s.
  • the total heat transfer resistance between the stave body and the cooling water is 4.22*10 -3 (m 2 ° C)/W.
  • An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the cooling wall body 1 and an inner water pipe 22 which is inserted into the outer steel pipe 21 in advance.
  • the inner water pipe 22 in this embodiment is a smooth water pipe, specifically a seamless steel pipe.
  • the outer wall pipe 21 of the pre-through water pipe has a pipe wall thickness of 1 mm, and the inner layer water pipe 22 has a pipe wall thickness of 6 mm.
  • the inner water pipe 22 in the outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is inserted in advance is a smooth water pipe, specifically a seamless steel pipe; after the pipe is finished, according to the requirements of the cooling wall drawing, Pre-wearing of the water pipe;
  • solid cooling medium comprising the following components by mass: 70 parts of 40-60 mesh orbs, 10 parts of lime powder, and 5 parts of vermiculite powder;
  • the high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace.
  • the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s
  • the hot runner strength of the cast iron stave of this embodiment is 114 (Kw/m). 2 )
  • the hot surface temperature is 789 ° C
  • the cold surface temperature is 87 ° C
  • the total heat transfer resistance between the stave body and the cooling water is 6.86 * 10 -4 (m 2 ° C) / W.
  • the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.7 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave.
  • the comprehensive thermal conductivity has increased by about 3 times.
  • An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a copper pipe, the outer steel pipe
  • the wall thickness of 21 is 10 mm
  • the wall thickness of the inner water tube 22 is 1 mm.
  • the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-inserted is a smooth water pipe, specifically a copper pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. Bending of a water pipe;
  • cooling medium comprising the following parts by mass: 90 parts of 40-60 mesh orbs, 5 parts of lime powder, 10 parts of vermiculite powder;
  • the high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace, the furnace temperature is about 1150 ° C, the cooling water speed is about 1.15 m / s, and the heat flow intensity of the cast iron stave of this embodiment is 142.5 (Kw / m 2 The hot surface temperature is 657 ° C, the cold surface temperature is 57 ° C, and the total heat transfer resistance between the stave body and the cooling water is 2.81 * 10 -4 (m 2 ° C) / W.
  • the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 2.16 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave.
  • the comprehensive thermal conductivity has increased by about 4 times.
  • An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a stainless steel pipe, the outer steel pipe
  • the wall thickness of 21 is 5 mm
  • the wall thickness of the inner water tube 22 is 5 mm.
  • the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-pierced is a smooth water pipe, specifically a stainless steel pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. Bending of the water pipe 2;
  • cooling medium comprising the following parts by mass: 80 parts of 40-60 mesh orbs, 8 parts of lime powder, and 8 parts of vermiculite powder;
  • the high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace.
  • the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s
  • the hot runner strength of the cast iron stave of this embodiment is 115 (Kw/m). 2 )
  • the hot surface temperature is 786 ° C
  • the cold surface temperature is 86 ° C
  • the total heat transfer resistance between the stave body and the cooling water is 6.85 * 10 -4 (m 2 ° C) / W.
  • the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.7 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave.
  • the comprehensive thermal conductivity has increased by about 3 times.
  • An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the cooling wall body 1 and an inner water pipe 22 which is inserted into the outer steel pipe 21 in advance.
  • the inner water pipe 22 in this embodiment is a smooth water pipe, specifically a seamless steel pipe.
  • the outer wall steel pipe 21 of the pre-through water pipe has a pipe wall thickness of 4 mm, and the inner layer water pipe 22 has a pipe wall thickness of 10 mm.
  • the inner water pipe 22 in the outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is inserted in advance is a smooth water pipe, specifically a seamless steel pipe; after the pipe is finished, according to the requirements of the cooling wall drawing, Pre-wearing the pipe.
  • S03 filling the pre-filled water pipe with a solid cooling medium, the solid cooling medium comprising the following components by mass: 70 parts of 40-60 mesh orbs, 10 parts of lime powder, 5 parts of vermiculite powder;
  • the outer surface of the outer steel tube 22 is coated with a metal nano-transition layer having a thickness of 5 ⁇ m, and the metal nano-transition layer comprises the following parts by mass: nano-scale nickel: 75 parts, copper: 25 parts, boron: 1.5 parts , silicon: 1.5 parts, rare earth lanthanum: 0.08 parts.
  • the high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace.
  • the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s
  • the hot runner strength of the cast iron stave of this embodiment is 123 (Kw/m). 2 )
  • the hot surface temperature is 762 ° C
  • the cold surface temperature is 81 ° C
  • the total heat transfer resistance between the stave body and the cooling water is 6.72 * 10 -4 (m 2 ° C) / W.
  • the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.87 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave.
  • the comprehensive thermal conductivity has increased by about 3 times.
  • An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a copper pipe, the outer steel pipe
  • the wall thickness of 21 is 10 mm
  • the wall thickness of the inner water pipe 22 is 3 mm.
  • the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-inserted is a smooth water pipe, specifically a copper pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. Bending the water pipe.
  • the cooling medium comprising the following parts by mass: 40 parts of 40-60 mesh orbolite, 5 parts of lime powder, 10 parts of vermiculite powder;
  • the outer surface of the water pipe is sprayed with a metal nano-transition layer having a thickness of 25 ⁇ m, and the metal nano-transition layer includes the following parts by mass: nano-scale nickel: 70 parts, copper: 30 parts, boron: 1 part, silicon: 2 Parts, rare earth lanthanum: 0.05 parts.
  • the high-efficiency long-life pre-pierced cast iron cooling wall provided by the embodiment is used in a blast furnace, the furnace temperature is about 1150 ° C, and the cooling water speed is about 1.15 m/s.
  • the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave of the present embodiment is 156.5 (Kw/m 2 ), the hot surface temperature is 634 ° C, the cold surface temperature is 52 ° C, and the total heat transfer resistance between the stave body and the cooling water is 2.72*10 -4 (m 2 ° C)/W .
  • the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 2.37 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave.
  • the comprehensive thermal conductivity has increased by about 4 times.
  • An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a stainless steel pipe, the outer steel pipe
  • the wall thickness of 21 is 4 mm
  • the wall thickness of the inner water pipe 22 is 4 mm.
  • the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-pierced is a smooth water pipe, specifically a stainless steel pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. The bending of the water pipe 2 is made.
  • the high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace.
  • the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s
  • the heat flow intensity of the cast iron stave of the present embodiment is 112 (Kw/m). 2 )
  • the hot surface temperature is 783 ° C
  • the cold surface temperature is 84 ° C
  • the total heat transfer resistance between the stave body and the cooling water is 6.71 * 10 -4 (m 2 ° C) / W.
  • the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.7 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave.
  • the comprehensive thermal conductivity has increased by about 3 times.

Abstract

A pre-perforating pipe cast iron cooling wall and a manufacturing method. Said cooling wall comprises a cast iron cooling wall body (1) and a pre-perforating water pipe (2); the pre-perforating water pipe (2) comprises an outer-layer steel pipe (21) casted into the cooling wall body, and an inner-layer water pipe (22) pre-perforated into the outer-layer steel pipe; and the inner-layer water pipe (22) is a seamless steel pipe or a copper pipe or a stainless steel pipe. The providing of the pre-perforating water pipe (2) overcomes the defects of poor cooling effect, short service life, high cost and difficulty in operation caused after a cooling water pipe is damaged on a conventional cooling wall and a thin-wall metal corrugated pipe is re-perforated into the damaged water pipe; and overcomes the defects that the cooling wall is directly scraped and the safety production of a blast furnace is severely influenced since the thin-wall metal corrugated pipe cannot be perforated into the damaged S-shaped water pipe in the cooling wall. The cooling wall body (1) and the outer-layer steel pipe (21) form a metallurgical structure, eliminating an air gap heat barrier, improving the comprehensive heating-conducting property, prolonging the service life of the cooling wall.

Description

一种高效长寿预穿管铸铁冷却壁及其制造工艺High-efficiency long-life pre-wearing tube cast iron stave and manufacturing process thereof 技术领域Technical field
本发明涉及冶金设备技术领域，尤其涉及一种高效长寿预穿管铸铁冷却壁的制造工艺。The invention relates to the technical field of metallurgical equipment, in particular to a manufacturing process of an efficient and long-life pre-pierced cast iron stave.
背景技术Background technique
现有国内外使用的铸铁冷却壁，时常因冷却壁铸入水管损坏漏水，造成冷却壁失去冷却能力而影响高炉的生产安全。为了挽救损坏的冷却壁，在铸铁冷却壁水管损坏后，只能现场在损坏的冷却壁水管中再穿入薄壁金属波纹管补救，以保持水管的通水冷却能力，恢复冷却壁的使用功能。但补救后的金属波纹管冷却效果较差，寿命一般在1-5个月，而且水流阻力大，增加能源消耗，且现场操作困难、施工费用高。并且，能采取穿薄壁金属波纹管补救措施的，仅限于冷却壁中铸入的水管是形状简单的“U”型管，对铸入水管是结构复杂的蛇形管，因无法采取穿金属波纹管措施而直接废弃，影响炼铁高炉的安全生产。The cast iron stave that is used at home and abroad is often damaged by water leaking from the cooling wall, which causes the cooling wall to lose cooling capacity and affect the production safety of the blast furnace. In order to save the damaged stave, after the cast iron stave pipe is damaged, only the thin-walled metal bellows can be remedied in the damaged stave pipe to ensure the water-cooling capacity of the pipe and restore the function of the stave. . However, the metal bellows after remediation has a poor cooling effect, and the service life is generally 1-5 months, and the water flow resistance is large, the energy consumption is increased, and the on-site operation is difficult and the construction cost is high. Moreover, the water pipe that can be taken through the thin-walled metal bellows is limited to the simple shape of the U-shaped pipe, and the cast-in water pipe is a complex serpentine tube because the metal can not be worn. Corrugated pipe measures are directly discarded, affecting the safe production of ironmaking blast furnaces.
现有国内外使用的铸铁冷却壁为保证铸入钢管延伸率不降低，必须在水管表面涂刷约0.2mm的陶瓷防渗碳涂层，造成涂层热障。因为陶瓷防渗碳涂层的存在，在铁水凝固过程中，冷却壁本体与水管之间会形成0.3mm的气隙层，形成气隙热障，严重的降低了冷却壁的导热性能，使冷却壁本体在使用过程中长期处于高温状态，因为铸铁冷却壁抗热震能力较差，尤其在高温下，铸铁高温力学性能急剧下降，造成冷却壁本体过早产生裂纹、剥落、熔蚀，进而损坏水管，失去冷却功能，造成冷却壁失效，影响高炉正常安全生产。The existing cast iron stave used at home and abroad is to ensure that the elongation of the cast steel pipe is not reduced, and a ceramic anti-carburizing coating of about 0.2 mm must be applied on the surface of the water pipe to cause a coating thermal barrier. Because of the existence of ceramic anti-seepage carbon coating, during the solidification process of molten iron, a 0.3 mm air gap layer is formed between the cooling wall body and the water pipe to form an air gap thermal barrier, which seriously reduces the thermal conductivity of the cooling wall and enables cooling. The wall body is in a high temperature state for a long time in use, because the cast iron stave has poor thermal shock resistance, especially at high temperatures, the high temperature mechanical properties of the cast iron drop sharply, causing premature cracking, spalling, erosion and damage of the stave body. The water pipe loses the cooling function, causing the cooling wall to fail and affecting the normal and safe production of the blast furnace.
发明内容Summary of the invention
本发明针对现有技术的不足，提供一种高效长寿预穿管铸铁冷却壁及其 制造工艺，以解决背景技术中铸铁冷却壁铸入水管在高炉使用破损后，或者因无法穿金属管补救造成冷却壁直接报废，或者因穿入薄壁金属波纹管后寿命过短，达不到延长铸铁冷却壁使用寿命的目的。以及因为铸入水管外表面存在涂层热障和气隙热障，造成冷却壁本体因温度过高，过早出现基体裂纹、脱落、被高炉渣铁侵蚀的问题。The invention aims at the deficiencies of the prior art, and provides an efficient and long-life pre-wearing tube cast iron stave and a manufacturing process thereof, to solve the problem that the cast iron cooling wall cast water pipe in the background art is damaged after being used in the blast furnace, or because the metal pipe cannot be remedy The stave is directly scrapped, or the service life is too short due to penetration into the thin-walled metal bellows, which does not extend the service life of the cast iron stave. And because there is a coating thermal barrier and an air gap thermal barrier on the outer surface of the cast pipe, the main body of the stave is too high in temperature, and the substrate cracks, falls off, and is eroded by the blast furnace slag.
本发明是通过如下技术方案实现的：The invention is achieved by the following technical solutions:
第一方面，本发明提供一种高效长寿预穿管铸铁冷却壁，包括铸铁冷却壁本体和预穿水管，所述预穿水管包括铸入冷却壁本体的外层钢管，以及在外层钢管中预先穿入的内层水管，所述内层水管为无缝钢管或铜管或不锈钢管。In a first aspect, the present invention provides an efficient long-life pre-pierced cast iron stave comprising a cast iron stave body and a pre-pierced water pipe, the pre-passing pipe comprising an outer steel pipe cast into the stave body and pre-exposed in the outer steel pipe An inner water pipe that is penetrated, and the inner water pipe is a seamless steel pipe or a copper pipe or a stainless steel pipe.
本申请的铸入冷却壁本体的外层钢管，在弯管前预先穿入内层水管，内层水管为光面钢管或铜管或不锈钢管。由于预穿水管为两层结构，即使冷却壁在长期高温情况下外层水管损坏，内层水管仍然保持正常冷却功能，使冷却壁使用寿命延长。克服了常规冷却壁在冷却水管破损后，在破损水管中重新穿入薄壁金属波纹管，冷却效果差、寿命短、成本高及操作困难的缺点，相对于冷却壁在使用损坏后穿薄壁金属波纹管补救，本申请提供的在铸造前在外层钢管内预先穿入光面无缝管的冷却壁，提高了冷却壁的可靠性，延长了冷却壁的使用寿命。本申请的设置还消除了损坏冷却壁中蛇形水管无法再穿入薄壁金属波纹管，从而造成了冷却壁直接报废，严重影响高炉安全生产的弊端。The outer steel pipe cast into the stave body of the present application is inserted into the inner water pipe before the elbow, and the inner water pipe is a smooth steel pipe or a copper pipe or a stainless steel pipe. Since the pre-passing water pipe has a two-layer structure, even if the outer wall water pipe is damaged under the long-term high temperature condition of the cooling wall, the inner water pipe maintains the normal cooling function, and the service life of the cooling wall is prolonged. The utility model overcomes the defects that the conventional cooling wall re-insers the thin-walled metal bellows in the damaged water pipe after the cooling water pipe is broken, has the advantages of poor cooling effect, short life, high cost and difficulty in operation, and wears a thin wall after the damage of the cooling wall is used. The metal bellows remedy, the cooling wall provided by the present application in the outer steel pipe before the casting into the smooth seamless pipe, improves the reliability of the cooling wall and prolongs the service life of the cooling wall. The arrangement of the present application also eliminates the damage that the serpentine water pipe in the cooling wall can no longer penetrate into the thin-walled metal bellows, thereby causing the cooling wall to be directly scrapped, which seriously affects the disadvantages of the safe production of the blast furnace.
优选的，本申请提供的预穿水管在外层钢管内预先穿入内层水管后再根据冷却壁要求进行弯制。Preferably, the pre-through water pipe provided by the present application is pre-punched into the inner water pipe in the outer steel pipe and then bent according to the requirements of the cooling wall.
优选的，所述外层钢管的外表面设有金属纳米过渡层，所述金属纳米过 渡层的厚度为5-50μm。Preferably, the outer surface of the outer steel tube is provided with a metal nano-transition layer, and the metal nano-transition layer has a thickness of 5 to 50 μm.
优选的，所述金属纳米过渡层包括如下质量份数的组分：纳米镍：70-80份，纳米铜：20-30份，纳米硼：1-2份，纳米硅：1-2份，纳米稀土钇：0.05-0.1份。Preferably, the metal nano-transition layer comprises the following components by mass: nano nickel: 70-80 parts, nano copper: 20-30 parts, nano boron: 1-2 parts, nano silicon: 1-2 parts, Nano rare earth lanthanum: 0.05-0.1 parts.
金属纳米过渡层的设置一方面可以防止铸铁本体的碳向外层钢管渗透，另一方面可以使铸铁本体与预穿管的外层管形成冶金结合，消除常规冷却壁的陶瓷涂层形成的涂层热障和气隙层形成的气隙热障，使本申请的冷却壁比常规冷却壁的综合导热性能提高3倍以上。The arrangement of the metal nano-transition layer can prevent the carbon of the cast iron body from penetrating into the outer steel tube on the one hand, and can form a metallurgical bond between the cast iron body and the outer tube of the pre-piercing tube on the other hand, and eliminate the coating formed by the ceramic coating of the conventional stave. The thermal barrier formed by the thermal barrier and the air gap layer increases the overall thermal conductivity of the cooling wall of the present application by more than three times than that of the conventional cooling wall.
第二方面，本发明提供一种高效长寿预穿管铸铁冷却壁的制造工艺，用于制造上述的高效长寿预穿管铸铁冷却壁，该制造工艺包括如下步骤：In a second aspect, the present invention provides a manufacturing process for an efficient and long-life pre-pierced cast iron stave for manufacturing the above-described high-efficiency long-life pre-pierced cast iron stave, the manufacturing process comprising the following steps:
S01：在备好的外层钢管中预先穿入内层水管，完成穿管后按照图纸要求对预穿水管进行弯制；S01: pre-passing the inner layer water pipe in the prepared outer steel pipe, and bending the pre-piercing water pipe according to the drawing requirements after completing the pipe threading;
S02：将所述预穿水管植入铸型内部，使所述预穿水管的出口和入口均位于所述铸型外部；S02: implanting the pre-through water pipe into the interior of the mold, so that the outlet and the inlet of the pre-through water pipe are located outside the mold;
S03：向所述预穿水管内填充固体冷却介质，所述固体冷却介质包括如下质量份数的组分：40-60目宝珠砂70-90份、石灰粉5-10份、蛭石粉5-10份；固体冷却介质的加入一方面起到冷却作用，防止预穿水管熔化，另一方面，固体冷却介质将预穿水管内部填充满，防止预穿水管发生变形。S03: filling the pre-through water pipe with a solid cooling medium, the solid cooling medium comprising the following components by mass: 70-60 mesh ore sand 70-90 parts, lime powder 5-10 parts, vermiculite powder 5- 10 parts; the addition of the solid cooling medium serves as a cooling function to prevent the pre-through water pipe from melting. On the other hand, the solid cooling medium fills the interior of the pre-filled water pipe to prevent deformation of the pre-through water pipe.
S04：向所述铸型内注入合格的灰铁、耐热铸铁或球墨铸铁铁水进行浇铸，浇铸过程中通入纯净的二氧化碳、氮气或氩气，浇铸成型得到高效长寿预穿管铸铁冷却壁。S04: injecting qualified gray iron, heat-resistant cast iron or ductile iron molten iron into the mold for casting, and adopting pure carbon dioxide, nitrogen or argon gas during the casting process, and casting to obtain a high-efficiency and long-life pre-wearing cast iron cooling wall.
优选的，所述步骤S01中，在所述外层钢管的外表面还喷涂或刷涂金属纳米过渡层。Preferably, in the step S01, a metal nano-transition layer is sprayed or brushed on the outer surface of the outer steel tube.
现有的常规冷却壁水管外表面的陶瓷涂层通常为0.2mm，水管表面有渗碳层，渗碳层厚度通常为0.1mm，由于陶瓷涂层的设置，水管和冷却壁本体之间存在间隙，形成气隙层，气隙层厚度一般为0.3mm。而采用本申请的方法制造的高效长寿预穿管铸铁冷却壁，外层钢管的外表面还设置5-50μm的金属纳米涂层，金属纳米涂层的设置使外层钢管表面无渗碳层，预穿水管和冷却壁本体之间没有气隙层，形成冶金结合，导热性能相比现有的常规冷却壁提高3倍以上。冷却壁在外层水管失效后，内层预穿水管继续发挥冷却作用，延长使用寿命1倍以上。The ceramic coating on the outer surface of the conventional conventional stave pipe is usually 0.2 mm, the carburized layer is on the surface of the water pipe, and the thickness of the carburized layer is usually 0.1 mm. Due to the arrangement of the ceramic coating, there is a gap between the water pipe and the stave body. An air gap layer is formed, and the thickness of the air gap layer is generally 0.3 mm. The high-efficiency long-life pre-pierced cast iron cooling wall manufactured by the method of the present application has a metal nano-coating of 5-50 μm on the outer surface of the outer steel tube, and the metal nano-coating layer is provided so that the outer steel pipe surface has no carburized layer. There is no air gap layer between the pre-through water pipe and the stave body to form a metallurgical bond, and the thermal conductivity is improved by more than three times compared with the conventional conventional stave. After the cooling wall fails in the outer water pipe, the inner layer pre-passing water pipe continues to exert cooling effect, prolonging the service life by more than one time.
优选的，所述内层水管为光面水管，所述光面水管为无缝钢管或铜管或不锈钢管。即所述预穿水管的外层管为钢管，内层管为钢管；或外层管为钢管，内层管为铜管；或外层管为钢管，内层管为不锈钢管。Preferably, the inner water pipe is a smooth water pipe, and the smooth water pipe is a seamless steel pipe or a copper pipe or a stainless steel pipe. That is, the outer tube of the pre-through pipe is a steel pipe, the inner pipe is a steel pipe; the outer pipe is a steel pipe, the inner pipe is a copper pipe; or the outer pipe is a steel pipe, and the inner pipe is a stainless steel pipe.
优选的，所述预穿水管的外层钢管的壁厚为1-10mm，内层水管的壁厚为1-10mm。Preferably, the outer tube of the pre-through water pipe has a wall thickness of 1-10 mm, and the inner layer water pipe has a wall thickness of 1-10 mm.
优选的，所述浇铸温度为1280-1370℃。Preferably, the casting temperature is 1280-1370 °C.
本申请中的预穿水管的壁厚与浇铸温度是相互配合、协同作用的，而浇铸温度对冷却壁的成型是非常重要的，本申请经过多次优化实验，采用上述厚度的预穿水管和上述温度进行浇铸时，得到的预穿管冷却壁的性能最好。The wall thickness of the pre-filled water pipe and the casting temperature in the present application are synergistic and synergistic, and the casting temperature is very important for the formation of the cooling wall. The present application has been subjected to multiple optimization experiments, using the pre-wearing pipe of the above thickness and When the above temperature is cast, the obtained pre-through tube stave has the best performance.
本发明实施例提供的技术方案可以包含以下有益效果：The technical solution provided by the embodiment of the present invention may include the following beneficial effects:
本申请提供的高效长寿预穿管铸铁冷却壁，即使冷却壁在长期高温情况下外层水管损坏，内层水管仍然保持正常冷却功能，使冷却壁使用寿命延长。The high-efficiency long-life pre-pierced cast iron stave provided by the present application maintains the normal cooling function of the inner water pipe even if the outer wall of the stave is damaged under the long-term high temperature condition, so that the service life of the stave is prolonged.
本申请使用了预穿水管，预穿水管的外层钢管的外表面涂有纳米金属涂层，该涂层防止了铸铁本体的碳向外层钢管表面渗透，以及纳米金属涂层在高温下的原子扩散，使冷却壁本体与外层水管形成冶金结合，消除了常规冷 却壁的陶瓷涂层形成的涂层热障和气隙层形成的气隙热障，使本申请的冷却壁比常规冷却壁的导热性能提高3倍以上，降低了冷却壁热面温度，提高了抗侵蚀能力，延长了冷却壁使用寿命。The present application uses a pre-filled water pipe, and the outer surface of the outer steel pipe pre-passing the water pipe is coated with a nano metal coating, which prevents the carbon of the cast iron body from penetrating the outer surface of the steel pipe and the nano metal coating at a high temperature. The atomic diffusion forms a metallurgical bond between the stave body and the outer water pipe, eliminating the thermal barrier formed by the ceramic coating of the conventional stave and the air gap thermal barrier formed by the air gap layer, so that the stave of the present application is more conventional than the stave The thermal conductivity is improved by more than 3 times, the hot surface temperature of the stave is lowered, the corrosion resistance is improved, and the service life of the stave is prolonged.
内层水管为铜管的冷却壁，在冷却壁外层钢管损坏后，因为内层纯铜管延伸率是钢管的3倍以上，极难产生裂纹损坏，并且，因为纯铜的导热性能是钢的10倍以上，即使铜管裸露在渣铁环境中，因铜管渣皮再生能力极强，极易挂渣，内层铜管在渣皮的保护下也极难因熔损造成失效。The inner water pipe is the cooling wall of the copper pipe. After the outer wall of the cooling wall is damaged, since the inner pure copper pipe elongation is more than three times that of the steel pipe, crack damage is extremely difficult, and because the thermal conductivity of pure copper is steel. More than 10 times, even if the copper tube is exposed in the slag iron environment, the copper tube slag skin is extremely strong in regenerating ability, and it is easy to hang the slag. The inner layer copper tube is extremely difficult to be broken due to the melt loss under the protection of the slag skin.
内层水管为不锈钢管的冷却壁，在冷却壁外层钢管损坏后，内层不锈钢管继续发挥冷却作用，并且，在冷却壁本体热面剥离裸露水管后，因不锈钢的抗化学侵蚀能力远高于普碳钢，所以获得比普碳钢管更长的使用寿命，继续发挥冷却功能。The inner water pipe is the cooling wall of the stainless steel pipe. After the outer steel pipe of the cooling wall is damaged, the inner stainless steel pipe continues to exert cooling effect, and after the hot water is removed from the hot surface of the cooling wall body, the chemical resistance of the stainless steel is much higher. Yupu carbon steel, so the longer life of the carbon steel pipe, continue to play the cooling function.
内层水管为钢管的冷却壁，在冷却壁外层钢管损坏后，内层钢管继续发挥冷却作用，使冷却壁寿命延长1倍以上，避免了在冷却壁水管损坏后不可靠的现场穿管作业，或者因水管形状复杂无法穿管直接造成冷却壁报废。The inner water pipe is the cooling wall of the steel pipe. After the outer steel pipe of the cooling wall is damaged, the inner steel pipe continues to exert cooling effect, which prolongs the life of the cooling wall by more than one time, and avoids unreliable on-site pipe-piercing operation after the cooling water pipe is damaged. Or because the shape of the water pipe is complicated and cannot be piped, the cooling wall is scrapped.
附图说明DRAWINGS
图1是本发明实施例提供的一种高效长寿预穿管铸铁冷却壁的整体结构示意图。1 is a schematic view showing the overall structure of an efficient and long-life pre-pierced cast iron cooling wall according to an embodiment of the present invention.
图2是本发明实施例提供的一种高效长寿预穿管铸铁冷却壁的水管的结构示意图。2 is a schematic structural view of a water pipe for an efficient and long-life pre-pierced cast iron cooling wall according to an embodiment of the present invention.
图中所示：冷却壁本体1、水管2、外层钢管21、内层水管22。Shown in the figure: the stave body 1, the water pipe 2, the outer steel pipe 21, and the inner water pipe 22.
具体实施方式detailed description
为了使本技术领域的人员更好地理解本发明中的技术方案,下面对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅 是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明的保护范围。The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and Not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
现有的常规铸铁冷却壁，在炉温1150℃左右，冷却水速1.15m/s左右时，热流强度为65.83(Kw/m 2)，热面温度为960℃，冷面温度为213℃，冷却壁本体与冷却水之间总的传热热阻为4.22*10 -3(m 2.℃)/W。 The conventional conventional cast iron stave has a heat flow intensity of 65.83 (Kw/m 2 ), a hot surface temperature of 960 ° C, and a cold surface temperature of 213 ° C when the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s. The total heat transfer resistance between the stave body and the cooling water is 4.22*10 -3 (m 2 ° C)/W.
实施例1Example 1
本发明实施例提供一种高效长寿预穿管铸铁冷却壁及其制造方法，所述高效长寿预穿管铸铁冷却壁包括铸铁冷却壁本体1及其内部的预穿水管2，所述预穿水管2包括铸入冷却壁本体1的外层钢管21，以及在外层钢管21中预先穿入的内层水管22，本实施例中的内层水管22为光面水管，具体为无缝钢管，所述预穿水管的外层钢管21的管壁厚为1mm，内层水管22的管壁厚为6mm。An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the cooling wall body 1 and an inner water pipe 22 which is inserted into the outer steel pipe 21 in advance. The inner water pipe 22 in this embodiment is a smooth water pipe, specifically a seamless steel pipe. The outer wall pipe 21 of the pre-through water pipe has a pipe wall thickness of 1 mm, and the inner layer water pipe 22 has a pipe wall thickness of 6 mm.
本实施例提供的高效长寿预穿管铸铁冷却壁由以下方法制造：The high efficiency long life pre-wearing tube cast iron stave provided by this embodiment is manufactured by the following method:
S01：在所述外层钢管21中，预先穿入内层水管22，预先穿入的内层水管22为光面水管，具体为无缝钢管；在完成穿管后，按照冷却壁图纸要求完成对预穿水管的弯制；S01: in the outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is inserted in advance is a smooth water pipe, specifically a seamless steel pipe; after the pipe is finished, according to the requirements of the cooling wall drawing, Pre-wearing of the water pipe;
S02：将所述预穿水管植入铸型内部，使所述预穿水管的出口和入口均位于所述铸型外部；S02: implanting the pre-through water pipe into the interior of the mold, so that the outlet and the inlet of the pre-through water pipe are located outside the mold;
S03：向所述预穿水管内填充固体冷却介质，所述固体冷却介质包括如下质量份数的组分：40-60目宝珠砂70份、石灰粉10份、蛭石粉5份；S03: filling the pre-filled water pipe with a solid cooling medium, the solid cooling medium comprising the following components by mass: 70 parts of 40-60 mesh orbs, 10 parts of lime powder, and 5 parts of vermiculite powder;
S04：向所述铸型内注入合格的灰铁铁水进行浇铸，浇铸过程中通入纯净的二氧化碳气体，浇铸温度为1280℃，浇铸成型得到高效长寿预穿管铸铁冷 却壁。S04: Injecting qualified gray iron iron water into the mold for casting, the pure carbon dioxide gas is introduced into the casting process, the casting temperature is 1280 ° C, and the casting is molded to obtain a high-efficiency long-life pre-wearing cast iron cooling wall.
本实施例提供的高效长寿预穿管铸铁冷却壁用于高炉中，在炉温1150℃左右，冷却水速1.15m/s左右时，本实施例的铸铁冷却壁热流强度为114(Kw/m 2)，热面温度为789℃，冷面温度为87℃，冷却壁本体与冷却水之间总的传热热阻为6.86*10 -4(m 2.℃)/W。 The high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace. When the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s, the hot runner strength of the cast iron stave of this embodiment is 114 (Kw/m). 2 ), the hot surface temperature is 789 ° C, the cold surface temperature is 87 ° C, and the total heat transfer resistance between the stave body and the cooling water is 6.86 * 10 -4 (m 2 ° C) / W.
由上可知，本实施例提供的高效长寿预穿管铸铁冷却壁热流强度是普通铸铁冷却壁的1.7倍左右，冷却本体与冷却水之间总的传热热阻是普通铸铁冷却壁的1/6左右，综合导热能力提高了约3倍。It can be seen from the above that the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.7 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave. Around 6, the comprehensive thermal conductivity has increased by about 3 times.
实施例2Example 2
本发明实施例提供一种高效长寿预穿管铸铁冷却壁及其制造方法，所述高效长寿预穿管铸铁冷却壁包括铸铁冷却壁本体1及其内部的预穿水管2，所述预穿水管2包括铸入冷却壁本体1的外层钢管21，以及在外层钢管21中预先穿入的内层水管22，所述内层水管22为光面水管，具体为铜管，所述外层钢管21的壁厚为10mm，内层水管22的壁厚为1mm。An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a copper pipe, the outer steel pipe The wall thickness of 21 is 10 mm, and the wall thickness of the inner water tube 22 is 1 mm.
本实施例提供的高效长寿预穿管铸铁冷却壁由以下方法制造：The high efficiency long life pre-wearing tube cast iron stave provided by this embodiment is manufactured by the following method:
S01：在备好的外层钢管21中，预先穿入内层水管22，预先穿入的内层水管22为光面水管，具体为铜管；在完成穿管后，按照冷却壁图纸要求完成预穿水管的弯制；S01: In the prepared outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-inserted is a smooth water pipe, specifically a copper pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. Bending of a water pipe;
S02：将所述预穿水管植入铸型内部，使所述预穿水管的出口和入口均位于所述铸型外部；S02: implanting the pre-through water pipe into the interior of the mold, so that the outlet and the inlet of the pre-through water pipe are located outside the mold;
S03：向预穿铜管内填充固体冷却介质，所述冷却介质包括如下质量份数的组分：40-60目宝珠砂90份、石灰粉5份、蛭石粉10份；S03: filling the pre-through copper tube with a solid cooling medium, the cooling medium comprising the following parts by mass: 90 parts of 40-60 mesh orbs, 5 parts of lime powder, 10 parts of vermiculite powder;
S04：向所述铸型内注入合格的耐热铸铁铁水进行浇铸，浇铸温度为 1370℃，浇铸过程中通入纯净的氮气，浇铸成型后得到高效长寿预穿管铸铁冷却壁。S04: Injecting qualified heat-resistant cast iron hot water into the mold for casting, the casting temperature is 1370 ° C, and pure nitrogen gas is introduced into the casting process, and the high-efficiency and long-life pre-pierced cast iron cooling wall is obtained after casting.
本实施例提供的高效长寿预穿管铸铁冷却壁用于高炉中，在炉温1150℃左右，冷却水速1.15m/s左右，本实施例的铸铁冷却壁热流强度为142.5(Kw/m 2)，热面温度为657℃，冷面温度为57℃，冷却壁本体与冷却水之间总的传热热阻为2.81*10 -4(m 2.℃)/W。 The high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace, the furnace temperature is about 1150 ° C, the cooling water speed is about 1.15 m / s, and the heat flow intensity of the cast iron stave of this embodiment is 142.5 (Kw / m 2 The hot surface temperature is 657 ° C, the cold surface temperature is 57 ° C, and the total heat transfer resistance between the stave body and the cooling water is 2.81 * 10 -4 (m 2 ° C) / W.
由上可知，本实施例提供的高效长寿预穿管铸铁冷却壁热流强度是普通铸铁冷却壁的2.16倍左右，冷却本体与冷却水之间总的传热热阻是普通铸铁冷却壁的1/15左右，综合导热能力提高了约4倍。It can be seen from the above that the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 2.16 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave. Around 15, the comprehensive thermal conductivity has increased by about 4 times.
实施例3Example 3
本发明实施例提供一种高效长寿预穿管铸铁冷却壁及其制造方法，所述高效长寿预穿管铸铁冷却壁包括铸铁冷却壁本体1及其内部的预穿水管2，所述预穿水管2包括铸入冷却壁本体1的外层钢管21，以及在外层钢管21中预先穿入的内层水管22，所述内层水管22为光面水管，具体为不锈钢管，所述外层钢管21的壁厚为5mm，内层水管22的壁厚为5mm。An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a stainless steel pipe, the outer steel pipe The wall thickness of 21 is 5 mm, and the wall thickness of the inner water tube 22 is 5 mm.
本实施例提供的高效长寿预穿管铸铁冷却壁由以下方法制造：The high efficiency long life pre-wearing tube cast iron stave provided by this embodiment is manufactured by the following method:
S01：在备好的外层钢管21中，预先穿入内层水管22，预先穿入的内层水管22为光面水管，具体为不锈钢管；在完成穿管后，按照冷却壁图纸要求完成预穿水管2的弯制；S01: In the prepared outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-pierced is a smooth water pipe, specifically a stainless steel pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. Bending of the water pipe 2;
S02：将所述预穿水管植入铸型内部，使所述预穿水管的出口和入口均位于所述铸型外部；S02: implanting the pre-through water pipe into the interior of the mold, so that the outlet and the inlet of the pre-through water pipe are located outside the mold;
S03：向预穿管内填充固体冷却介质，所述冷却介质包括如下质量份数的组分：40-60目宝珠砂80份、石灰粉8份、蛭石粉8份；S03: filling the pre-piercing tube with a solid cooling medium, the cooling medium comprising the following parts by mass: 80 parts of 40-60 mesh orbs, 8 parts of lime powder, and 8 parts of vermiculite powder;
S04：向所述铸型内注入合格的球墨铸铁铁水进行浇铸，浇铸温度为1320℃，浇铸过程中通入纯净的氩气，浇铸成型得到高效长寿预穿管铸铁冷却壁。S04: Injecting qualified ductile iron molten iron into the mold for casting, the casting temperature is 1320 ° C, pure argon gas is introduced into the casting process, and casting is performed to obtain a high-efficiency and long-life pre-wearing cast iron cooling wall.
本实施例提供的高效长寿预穿管铸铁冷却壁用于高炉中，在炉温1150℃左右，冷却水速1.15m/s左右时，本实施例的铸铁冷却壁热流强度为115(Kw/m 2)，热面温度为786℃，冷面温度为86℃，冷却壁本体与冷却水之间总的传热热阻为6.85*10 -4(m 2.℃)/W。 The high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace. When the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s, the hot runner strength of the cast iron stave of this embodiment is 115 (Kw/m). 2 ), the hot surface temperature is 786 ° C, the cold surface temperature is 86 ° C, and the total heat transfer resistance between the stave body and the cooling water is 6.85 * 10 -4 (m 2 ° C) / W.
由上可知，本实施例提供的高效长寿预穿管铸铁冷却壁热流强度是普通铸铁冷却壁的1.7倍左右，冷却本体与冷却水之间总的传热热阻是普通铸铁冷却壁的1/6左右，综合导热能力提高了约3倍。It can be seen from the above that the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.7 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave. Around 6, the comprehensive thermal conductivity has increased by about 3 times.
实施例4Example 4
本发明实施例提供一种高效长寿预穿管铸铁冷却壁及其制造方法，所述高效长寿预穿管铸铁冷却壁包括铸铁冷却壁本体1及其内部的预穿水管2，所述预穿水管2包括铸入冷却壁本体1的外层钢管21，以及在外层钢管21中预先穿入的内层水管22，本实施例中的内层水管22为光面水管，具体为无缝钢管，所述预穿水管的外层钢管21的管壁厚为4mm，内层水管22的管壁厚为10mm。An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the cooling wall body 1 and an inner water pipe 22 which is inserted into the outer steel pipe 21 in advance. The inner water pipe 22 in this embodiment is a smooth water pipe, specifically a seamless steel pipe. The outer wall steel pipe 21 of the pre-through water pipe has a pipe wall thickness of 4 mm, and the inner layer water pipe 22 has a pipe wall thickness of 10 mm.
本实施例提供的高效长寿预穿管铸铁冷却壁由以下方法制造：The high efficiency long life pre-wearing tube cast iron stave provided by this embodiment is manufactured by the following method:
S01：在所述外层钢管21中，预先穿入内层水管22，预先穿入的内层水管22为光面水管，具体为无缝钢管；在完成穿管后，按照冷却壁图纸要求完成对预穿水管的弯制。S01: in the outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is inserted in advance is a smooth water pipe, specifically a seamless steel pipe; after the pipe is finished, according to the requirements of the cooling wall drawing, Pre-wearing the pipe.
S02：将所述预穿水管植入铸型内部，使所述预穿水管的出口和入口均位于所述铸型外部。S02: implanting the pre-through water pipe into the interior of the mold such that the outlet and the inlet of the pre-through water pipe are located outside the mold.
S03：向所述预穿水管内填充固体冷却介质，所述固体冷却介质包括如下质量份数的组分：40-60目宝珠砂70份、石灰粉10份、蛭石粉5份；同时在所述外层钢管22的外表面刷涂5μm厚度的金属纳米过渡层，所述金属纳米过渡层包括如下质量份数的组分：纳米级的镍：75份，铜：25份，硼：1.5份，硅：1.5份，稀土钇：0.08份。S03: filling the pre-filled water pipe with a solid cooling medium, the solid cooling medium comprising the following components by mass: 70 parts of 40-60 mesh orbs, 10 parts of lime powder, 5 parts of vermiculite powder; The outer surface of the outer steel tube 22 is coated with a metal nano-transition layer having a thickness of 5 μm, and the metal nano-transition layer comprises the following parts by mass: nano-scale nickel: 75 parts, copper: 25 parts, boron: 1.5 parts , silicon: 1.5 parts, rare earth lanthanum: 0.08 parts.
S04：向所述铸型内注入合格的灰铁铁水进行浇铸，浇铸过程中通入纯净的二氧化碳气体，浇铸温度为1280℃，浇铸成型得到高效长寿预穿管铸铁冷却壁。S04: Injecting qualified gray iron iron water into the mold for casting, and introducing pure carbon dioxide gas into the casting process, the casting temperature is 1280 ° C, and casting and forming a high-efficiency long-life pre-wearing cast iron cooling wall.
本实施例提供的高效长寿预穿管铸铁冷却壁用于高炉中，在炉温1150℃左右，冷却水速1.15m/s左右时，本实施例的铸铁冷却壁热流强度为123(Kw/m 2)，热面温度为762℃，冷面温度为81℃，冷却壁本体与冷却水之间总的传热热阻为6.72*10 -4(m 2.℃)/W。 The high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace. When the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s, the hot runner strength of the cast iron stave of this embodiment is 123 (Kw/m). 2 ), the hot surface temperature is 762 ° C, the cold surface temperature is 81 ° C, and the total heat transfer resistance between the stave body and the cooling water is 6.72 * 10 -4 (m 2 ° C) / W.
由上可知，本实施例提供的高效长寿预穿管铸铁冷却壁热流强度是普通铸铁冷却壁的1.87倍左右，冷却本体与冷却水之间总的传热热阻是普通铸铁冷却壁的1/6.3左右，综合导热能力提高了约3倍。It can be seen from the above that the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.87 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave. Around 6.3, the comprehensive thermal conductivity has increased by about 3 times.
实施例5Example 5
本发明实施例提供一种高效长寿预穿管铸铁冷却壁及其制造方法，所述高效长寿预穿管铸铁冷却壁包括铸铁冷却壁本体1及其内部的预穿水管2，所述预穿水管2包括铸入冷却壁本体1的外层钢管21，以及在外层钢管21中预先穿入的内层水管22，所述内层水管22为光面水管，具体为铜管，所述外层钢管21的壁厚为10mm，内层水管22的壁厚为3mm。An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a copper pipe, the outer steel pipe The wall thickness of 21 is 10 mm, and the wall thickness of the inner water pipe 22 is 3 mm.
本实施例提供的高效长寿预穿管铸铁冷却壁由以下方法制造：The high efficiency long life pre-wearing tube cast iron stave provided by this embodiment is manufactured by the following method:
S01：在备好的外层钢管21中，预先穿入内层水管22，预先穿入的内层 水管22为光面水管，具体为铜管；在完成穿管后，按照冷却壁图纸要求完成预穿水管的弯制。S01: In the prepared outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-inserted is a smooth water pipe, specifically a copper pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. Bending the water pipe.
S02：将所述预穿水管植入铸型内部，使所述预穿水管的出口和入口均位于所述铸型外部。S02: implanting the pre-through water pipe into the interior of the mold such that the outlet and the inlet of the pre-through water pipe are located outside the mold.
S03：向预穿铜管内填充固体冷却介质，所述冷却介质包括如下质量份数的组分：40-60目宝珠砂90份、石灰粉5份、蛭石粉10份；同时在所述复合水管的外表面喷涂厚度为25μm的金属纳米过渡层，所述金属纳米过渡层包括如下质量份数的组分：纳米级的镍：70份，铜：30份，硼：1份，硅：2份，稀土钇：0.05份。S03: filling the pre-through copper tube with a solid cooling medium, the cooling medium comprising the following parts by mass: 40 parts of 40-60 mesh orbolite, 5 parts of lime powder, 10 parts of vermiculite powder; The outer surface of the water pipe is sprayed with a metal nano-transition layer having a thickness of 25 μm, and the metal nano-transition layer includes the following parts by mass: nano-scale nickel: 70 parts, copper: 30 parts, boron: 1 part, silicon: 2 Parts, rare earth lanthanum: 0.05 parts.
S04：向所述铸型内注入合格的耐热铸铁铁水进行浇铸，浇铸温度为1370℃，浇铸过程中通入纯净的氮气，浇铸成型后得到高效长寿预穿管铸铁冷却壁。S04: Injecting qualified hot-melt cast iron into the mold for casting, the casting temperature is 1370 ° C, pure nitrogen is introduced into the casting process, and the high-efficiency long-life pre-wearing cast iron stave is obtained after casting.
本实施例提供的高效长寿预穿管铸铁冷却壁用于高炉中，在炉温1150℃左右，冷却水速1.15m/s左右，本实施例的高效长寿预穿管铸铁冷却壁的热流强度为156.5(Kw/m 2)，热面温度为634℃，冷面温度为52℃，冷却壁本体与冷却水之间总的传热热阻为2.72*10 -4(m 2.℃)/W。 The high-efficiency long-life pre-pierced cast iron cooling wall provided by the embodiment is used in a blast furnace, the furnace temperature is about 1150 ° C, and the cooling water speed is about 1.15 m/s. The heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave of the present embodiment is 156.5 (Kw/m 2 ), the hot surface temperature is 634 ° C, the cold surface temperature is 52 ° C, and the total heat transfer resistance between the stave body and the cooling water is 2.72*10 -4 (m 2 ° C)/W .
由上可知，本实施例提供的高效长寿预穿管铸铁冷却壁热流强度是普通铸铁冷却壁的2.37倍左右，冷却本体与冷却水之间总的传热热阻是普通铸铁冷却壁的1/15左右，综合导热能力提高了约4倍。It can be seen from the above that the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 2.37 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave. Around 15, the comprehensive thermal conductivity has increased by about 4 times.
实施例6Example 6
本发明实施例提供一种高效长寿预穿管铸铁冷却壁及其制造方法，所述高效长寿预穿管铸铁冷却壁包括铸铁冷却壁本体1及其内部的预穿水管2，所述预穿水管2包括铸入冷却壁本体1的外层钢管21，以及在外层钢管21 中预先穿入的内层水管22，所述内层水管22为光面水管，具体为不锈钢管，所述外层钢管21的壁厚为4mm，内层水管22的壁厚为4mm。An embodiment of the present invention provides a high-efficiency long-life pre-piercing cast iron cooling wall comprising a cast iron stave body 1 and a pre-through water pipe 2 therein, and a pre-wearing water pipe 2 includes an outer steel pipe 21 cast into the stave body 1 and an inner water pipe 22 pre-penetrated in the outer steel pipe 21, the inner water pipe 22 being a smooth water pipe, specifically a stainless steel pipe, the outer steel pipe The wall thickness of 21 is 4 mm, and the wall thickness of the inner water pipe 22 is 4 mm.
本实施例提供的高效长寿预穿管铸铁冷却壁由以下方法制造：The high efficiency long life pre-wearing tube cast iron stave provided by this embodiment is manufactured by the following method:
S01：在备好的外层钢管21中，预先穿入内层水管22，预先穿入的内层水管22为光面水管，具体为不锈钢管；在完成穿管后，按照冷却壁图纸要求完成预穿水管2的弯制。S01: In the prepared outer steel pipe 21, the inner water pipe 22 is pre-inserted, and the inner water pipe 22 that is pre-pierced is a smooth water pipe, specifically a stainless steel pipe; after the pipe is finished, the preheating is completed according to the requirements of the cooling wall drawing. The bending of the water pipe 2 is made.
S02：将所述预穿水管植入铸型内部，使所述预穿水管的出口和入口均位于所述铸型外部。S02: implanting the pre-through water pipe into the interior of the mold such that the outlet and the inlet of the pre-through water pipe are located outside the mold.
S03：向预穿管内填充固体冷却介质，所述冷却介质包括如下质量份数的组分：40-60目宝珠砂80份、石灰粉8份、蛭石粉8份；同时在所述复合水管的外表面喷涂厚度为50μm的金属纳米过渡层，所述金属纳米过渡层包括如下质量份数的组分：纳米级的镍：80份，铜：20份，硼：2份，硅：1份，稀土钇：0.1份。S03: filling the pre-piercing tube with a solid cooling medium, the cooling medium comprising the following parts by mass: 80 parts of 40-60 mesh orbs, 8 parts of lime powder, 8 parts of vermiculite powder; and simultaneously in the composite water pipe The outer surface is sprayed with a metal nano-transition layer having a thickness of 50 μm, the metal nano-transition layer comprising the following components by mass: nano-scale nickel: 80 parts, copper: 20 parts, boron: 2 parts, silicon: 1 part, Rare earth lanthanum: 0.1 part.
S04：向所述铸型内注入合格的球墨铸铁铁水进行浇铸，浇铸温度为1320℃，浇铸过程中通入纯净的氩气，浇铸成型得到高效长寿预穿管铸铁冷却壁。S04: Injecting qualified ductile iron molten iron into the mold for casting, the casting temperature is 1320 ° C, pure argon gas is introduced into the casting process, and casting is performed to obtain a high-efficiency and long-life pre-wearing cast iron cooling wall.
本实施例提供的高效长寿预穿管铸铁冷却壁用于高炉中，在炉温1150℃左右，冷却水速1.15m/s左右时，本实施例的铸铁冷却壁热流强度为112(Kw/m 2)，热面温度为783℃，冷面温度为84℃，冷却壁本体与冷却水之间总的传热热阻为6.71*10 -4(m 2.℃)/W。 The high-efficiency long-life pre-pierced cast iron cooling wall provided in this embodiment is used in a blast furnace. When the furnace temperature is about 1150 ° C and the cooling water speed is about 1.15 m/s, the heat flow intensity of the cast iron stave of the present embodiment is 112 (Kw/m). 2 ), the hot surface temperature is 783 ° C, the cold surface temperature is 84 ° C, and the total heat transfer resistance between the stave body and the cooling water is 6.71 * 10 -4 (m 2 ° C) / W.
由上可知，本实施例提供的高效长寿预穿管铸铁冷却壁热流强度是普通铸铁冷却壁的1.7倍左右，冷却本体与冷却水之间总的传热热阻是普通铸铁冷却壁的1/6左右，综合导热能力提高了约3倍。It can be seen from the above that the heat flow intensity of the high-efficiency long-life pre-pierced cast iron stave cooling wall provided by the embodiment is about 1.7 times that of the ordinary cast iron stave, and the total heat transfer resistance between the cooling body and the cooling water is 1/1 of the ordinary cast iron stave. Around 6, the comprehensive thermal conductivity has increased by about 3 times.
当然，上述说明也并不仅限于上述举例，本发明未经描述的技术特征可以通过或采用现有技术实现，在此不再赘述；以上实施例仅用于说明本发明的技术方案并非是对本发明的限制，参照优选的实施方式对本发明进行了详细说明，本领域的普通技术人员应当理解，本技术领域的普通技术人员在本发明的实质范围内所做出的变化、改型、添加或替换都不脱离本发明的宗旨，也应属于本发明的权利要求保护范围。Of course, the above description is not limited to the above examples, and the technical features that are not described in the present invention may be implemented by using or adopting the prior art, and are not described herein again; the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be the present invention. The present invention has been described in detail with reference to the preferred embodiments thereof, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the scope of the invention. It is also within the scope of the claims of the invention, without departing from the spirit of the invention.

Claims (8)

  1. 一种高效长寿预穿管铸铁冷却壁，其特征在于，包括铸铁冷却壁本体(1)和预穿水管(2)，所述预穿水管(2)包括铸入冷却壁本体(1)的外层钢管(21)，以及在外层钢管(21)中预先穿入的内层水管(22)，所述内层水管(22)为无缝钢管、铜管或不锈钢管。An efficient long-life pre-piercing cast iron stave comprising a cast iron stave body (1) and a pre-passing water pipe (2), the pre-through water pipe (2) comprising an outer wall of the stave body (1) a layer of steel pipe (21), and an inner water pipe (22) pre-penetrated in the outer steel pipe (21), the inner water pipe (22) being a seamless steel pipe, a copper pipe or a stainless steel pipe.
  2. 根据权利要求1所述的一种高效长寿预穿管铸铁冷却壁，其特征在于，所述外层钢管(21)的外表面设有金属纳米过渡层，所述金属纳米过渡层的厚度为5-50μm。The high-efficiency long-life pre-piercing tube cast iron stave according to claim 1, wherein the outer surface of the outer steel pipe (21) is provided with a metal nano-transition layer, and the thickness of the metal nano-transition layer is 5 -50 μm.
  3. 根据权利要求2所述的一种高效长寿预穿管铸铁冷却壁，其特征在于，所述金属纳米过渡层包括如下质量份数的组分：纳米镍：70-80份，纳米铜：20-30份，纳米硼：1-2份，纳米硅：1-2份，纳米稀土钇：0.05-0.1份。The high-efficiency long-life pre-piercing tube cast iron stave according to claim 2, wherein the metal nano-transition layer comprises the following components by mass: nano nickel: 70-80 parts, nano copper: 20- 30 parts, nano boron: 1-2 parts, nano silicon: 1-2 parts, nano rare earth lanthanum: 0.05-0.1 parts.
  4. 一种如权利要求1所述的高效长寿预穿管铸铁冷却壁的制造工艺，其特征在于，包括如下步骤：A manufacturing process for an efficient long-life pre-pierced cast iron stave according to claim 1, comprising the steps of:
    S01：在外层钢管(21)中预先穿入内层水管(22)，完成穿管后按照要求对预穿水管(2)进行弯制；S01: pre-passing the inner water pipe (22) in the outer steel pipe (21), and bending the pre-piercing water pipe (2) as required after the pipe is completed;
    S02：将所述预穿水管(2)植入铸型内部，使所述预穿水管(2)的出口和入口均位于所述铸型外部；S02: implanting the pre-through water pipe (2) into the interior of the mold such that the outlet and the inlet of the pre-through water pipe (2) are located outside the mold;
    S03：向所述预穿水管(2)内填充固体冷却介质，所述固体冷却介质包括如下质量份数的组分：40-60目宝珠砂70-90份、石灰粉5-10份、蛭石粉5-10份；S03: filling the pre-through water pipe (2) with a solid cooling medium, the solid cooling medium comprising the following components by mass: 70-60 mesh ore sand 70-90 parts, lime powder 5-10 parts, 蛭5-10 parts of stone powder;
    S04：向所述铸型内注入合格的灰铁、耐热铸铁或球墨铸铁铁水进行浇铸，浇铸过程中通入纯净的二氧化碳、氮气或氩气。S04: Injecting qualified gray iron, heat-resistant cast iron or ductile iron molten iron into the mold for casting, and introducing pure carbon dioxide, nitrogen or argon into the casting process.
  5. 根据权利要求4所述的一种高效长寿预穿管铸铁冷却壁的制造工艺，其特征在于，所述步骤S01中，所述内层水管(22)为无缝钢管或铜管或不锈钢 管。The manufacturing process of a high-efficiency long-life pre-pierced cast iron stave according to claim 4, wherein in the step S01, the inner water pipe (22) is a seamless steel pipe or a copper pipe or a stainless steel pipe.
  6. 根据权利要求4所述的一种高效长寿预穿管铸铁冷却壁的制造工艺，其特征在于，所述步骤S01中，在所述外层钢管(21)的外表面还喷涂或刷涂金属纳米过渡层。The manufacturing process of a high-efficiency long-life pre-pierced cast iron stave according to claim 4, wherein in the step S01, the outer surface of the outer steel pipe (21) is further sprayed or brushed with metal nanometers. Transition layer.
  7. 根据权利要求6所述的一种高效长寿预穿管铸铁冷却壁的制造工艺，其特征在于，所述外层钢管(21)的水管壁厚为1-10mm，所述内层水管(22)的壁厚为1-10mm。The manufacturing process of a high-efficiency long-life pre-pierced cast iron stave according to claim 6, wherein the outer steel pipe (21) has a water pipe wall thickness of 1-10 mm, and the inner water pipe (22) The wall thickness is 1-10 mm.
  8. 根据权利要求7所述的一种高效长寿预穿管铸铁冷却壁的制造工艺，其特征在于，所述浇铸温度为1280-1370℃。The invention relates to a process for manufacturing a high-efficiency long-life pre-pierced cast iron stave according to claim 7, wherein the casting temperature is 1280-1370 °C.
PCT/CN2018/091195 2018-04-03 2018-06-14 High-efficient long-life pre-perforating pipe cast iron cooling wall and manufacturing process therefor WO2019192074A1 (en)

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