CN101020932A - Laminated cooling walls - Google Patents
Laminated cooling walls Download PDFInfo
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- CN101020932A CN101020932A CN 200710026292 CN200710026292A CN101020932A CN 101020932 A CN101020932 A CN 101020932A CN 200710026292 CN200710026292 CN 200710026292 CN 200710026292 A CN200710026292 A CN 200710026292A CN 101020932 A CN101020932 A CN 101020932A
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Abstract
The laminated cooling wall includes one base wall body layer, one laminated wall layer and one water pipe. The base wall body layer and the laminated wall layer have separate base wall body layer cooling channel U and laminated wall layer cooling channel The with separate water inlets and water outlets. The technological scheme of the present invention has raised cooling effect, saving in copper material, low cost and other beneficial effects.
Description
One, technical field
The invention belongs to blast furnace and high temperature wall body cooling apparatus field, particularly relate to a kind of superposed type cooling stave.
Two, background technology
Long Campaign Blast Furnace body cooling apparatus must satisfy the blast furnace inwall under smelting condition, can hang up slag crust securely, forms the purpose of permanent furnace lining.For this reason, the cooling stave that blast furnace uses is brought in constant renewal in and is regenerated, and from using material, develops into the very high copper cooling wall of thermal conductivity from cast-iron cooling wall and cast steel (or steel plate boring) cooling stave.The cast-iron cooling wall poor heat stability can not form the permanent type furnace lining, has a strong impact on blast furnace campaign.Cast steel cooling wall teeming temperature height, the liquefaction of water pipe surface causes additional prestressing, and water pipe is cracked, though the defective that steel plate boring cooling stave does not exist pouring technology to cause because of the material thermal conductivity is low, can not form the permanent type furnace lining.And the full copper cooling wall that extensively adopts at present, it is processed by cast copper manufacturing or copper coin boring, uses the high-temperature area at blast-furnace body usually, can satisfy the condition that forms the permanent type furnace lining; But because copper material intensity is lower, for guaranteeing cooling stave enough physical strengths are arranged, copper cooling wall must keep corresponding thickness, so amount of copper consuming is bigger, costs an arm and a leg.
Utility model patent 03232865.6 discloses a kind of " blast furnace cooling stave of copper and iron containing alloy combination ".This cooling stave is the blast furnace cooling stave that is combined by huyashi-chuuka (cold chinese-style noodles) layer and hot-face layer, hot-face layer adopts copper material, the huyashi-chuuka (cold chinese-style noodles) layer adopts the steel or the pig iron, the huyashi-chuuka (cold chinese-style noodles) layer is combined by bolt 3 with hot-face layer and is fastening, all carry out sealing between two-layer on the contact surface, two-layer between not the formed cavity in contact surface position be the passage of water coolant.Though this cooling stave can reduce the consumption of copper material, but, its cooling channel structure forms back the merging because being slotted respectively by hot and cold surface layer, and seal with sealing member, this structure is in blast furnace under the pyritous environment, owing to reasons such as inevitable thermal distortions, occur drainage easily, have potential safety hazard.
Utility model patent 02229151.2 discloses a kind of combined cooling stave.This cooling stave connects combination by inside and outside cooling wall body by fastening piece, and its water-cooled tube is embedded in the groove.This cooling stave can reduce the consumption of copper material equally, but because its cooling channel is to adopt the pipe laying structure, unavoidably has contact gap, and refrigerating function is greatly affected.The bonding surface of its inside and outside cooling wall body is the mechanical engagement face simultaneously, because cooling stave can produce distortion under hot environment, therefore occurs the defective of leaking easily.
Three, summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, particularly solve full copper cooling wall good cooling results but cost an arm and a leg, existing built-up type cooling stave exists security hidden trouble such as leak, and a kind of novel structure, superposed type cooling stave safe in utilization are provided.
The present invention seeks to realize like this, described superposed type cooling stave, comprise base layer wall body 2, superimposed overlapping layers wall body 1 and water inlet pipe and water outlet pipe 7 on base layer wall body 2 hot sides, described overlapping layers wall body 1 and base layer wall body 2 are respectively arranged with the cooling channel T4 of overlapping layers wall body 1 and the cooling channel U10 of base layer wall body 2, respectively offer the paddle hole 5 that is connected cooling channel T4 and cooling channel U10 on the huyashi-chuuka (cold chinese-style noodles) of overlapping layers wall body 1 and base layer wall body 2, described water inlet pipe and water outlet pipe 7 is connected with paddle hole 5, with offer the through hole 6 that can pass on the paddle hole 5 pairing base layer wall bodies 2 of overlapping layers wall body 1 for the water inlet pipe and water outlet pipe 7 of overlapping layers wall body 1, described through hole 6 is spaced from each other with the cooling channel 10 of base layer wall body 2, guarantees reasonable safe distance between the two.
One side towards the stove heart when base layer wall body 2 of this superposed type cooling stave uses is hot side, is huyashi-chuuka (cold chinese-style noodles) towards the one side of furnace wall, and its hot side can be with dovetail-indent, also can be the light face; Described base layer wall body 2 is made by cast iron, cast steel or steel plate, and by the base layer wall body 2 that cast iron or cast steel are made, it is round or oblate pass or polygon pass that its cooling channel U10 becomes cross-sectional shape W12 by casting processing; By the base layer wall body 2 that steel plate is made, to be processed into cross-sectional shape W12 be round to its cooling channel U10 or justify overlapped pass more by boring.
One side towards the stove heart when overlapping layers wall body 1 of this superposed type cooling stave uses is hot side, and the one side superimposed with base layer wall body 2 is huyashi-chuuka (cold chinese-style noodles), and its hot side both can be with dovetail-indent, also can be the light face; Described overlapping layers wall body 1 is made by cast copper or fine copper plate, and by the overlapping layers wall body 1 that cast copper is made, it is round or oblate pass or polygon pass that its cooling channel T4 becomes cross-sectional shape V11 by casting processing; By the overlapping layers wall body 1 that copper coin is made, to be processed into cross-sectional shape V11 be round to its cooling channel T4 or justify overlapped pass more by boring.
The superimposed mode of described superposed type cooling stave can be that the hot side integral body of base layer wall body 2 is superimposed with overlapping layers wall body 1, or the part is superimposed with overlapping layers wall body 1, or the multi-section position is superimposed with overlapping layers wall body 1, and superimposed mode is versatile and flexible, can determine by design as required.
Described base layer wall body 2 is fixedlyed connected by bolt 3 or dovetail-indent with overlapping layers wall body 1; For eliminating the stress-difference that differing materials produces because of high temperature deformation, be provided with pad 8 between base layer wall body 2 and the overlapping layers wall body 1, described pad 8 is individual layer pad or multi-layer gasket, the gap between each layer of multi-layer gasket is filled with high heat conduction stopping composition 9.
The overlapping layers wall body 1 and the base layer wall body 2 of this superposed type cooling stave all have separately independently cooling channel, exceed with the thickness that is not less than water inlet pipe and water outlet pipe 7 to the distance of each laminar surface in each cooling channel, cooling channel quantity and shape can be determined as required, require both to have guaranteed the whole cooling performance of superposed type cooling stave, make things convenient for bolt 3 between each layer of superposed type cooling stave to connect again and the installation of water inlet pipe and water outlet pipe 7, can adopt the water pipe series connection between each layer cooling channel, also can be by independently water pipe connection separately; The overlapping layers wall body 1 of superposed type cooling stave has the cooling performance of full copper cooling wall, and base layer wall body 2 can guarantee the physical strength of superposed type cooling stave; Because overlapping layers wall body 1 and base layer wall body 2 all have separately independently cooling channel, so just in case when having indivedual cooling channels to break down, by strengthening the flow rate of other cooling channels, make superposed type cooling stave integral body can also play cooling effect, therefore can increase substantially superposed type cooling stave safety in utilization; The present invention also can be applicable to multiple high temperature wall body cooling apparatus field except that can be applicable to iron-smelting blast furnace cooling apparatus field.
Beneficial effect analysis of the present invention:
(1) in the cooling performance and physical strength that guarantee cooling stave, reduces copper material consumption significantly.The high major cause of the full copper cooling wall copper material consumption of Cai Yonging now is, because the intensity of copper material is less, and the further attenuate of the thickness of full copper cooling wall under the condition of proof strength.And cast iron or hardness of steel are bigger, and with its base layer wall body 2 of doing cooling stave, copper material is done overlapping layers wall body 1, has both guaranteed the requirement of strength of cooling stave, can utilize the good advantage of copper material thermal conduction effect again.The intensity support of base layer wall body 2 has been arranged, just the remarkable attenuate of the copper plate thickness of overlapping layers wall body 1 can have been reduced copper material consumption significantly, reduced cost.
(2) the superposed type cooling stave with independent cooling structure has the safety in utilization of more rational cooling performance and Geng Gao.The overlapping layers wall body 1 of superposed type cooling stave adopts cooling performance copper material manufacturing preferably, and have a plurality of independently cooling structures on the whole, increased the heat interchanging area of cooling stave, therefore had the more cooling performance of reasonably optimizing than the copper cooling wall that has only single cooling structure.
(3) the superposed type cooling stave with independent cooling structure can solve the cooling difficult problem of the special aspect of blast-furnace body.As the high-temperature area that the cupola well tuyere zone is in blast furnace gas, solid, liquid three-phase and deposits, this cooling stave top, zone is the air port band that circles round, and cast-iron cooling wall is easily damaged at this position; Soak and deposit the district and should cooling stave bottom, zone be in the slag molten iron, but because of the refractory materials protection is arranged, cast-iron cooling wall can adapt to the long-lived requirement of blast furnace.Therefore adopt overlapping layers wall body 1 local superimposed superposed type cooling stave in the blast-furnace tuyere district, promptly the ultra-thin copper overlapping layers wall body 1 of superimposed part on cast iron matrix layer wall body 2 both can solve the local rapid wear difficult problem of traditional cast-iron cooling wall, can reduce investment outlay again.
(4) the superposed type cooling stave with independent cooling structure can be realized the technique effect that heat flow rate per unit area is complementary in local cooling intensity of cooling stave and the blast furnace.To the top zone of transition, heat flow rate per unit area changes greatly as the blast furnace stack middle part, if adopt full copper cooling wall, then investment is too big, causes waste, if adopt cast iron, cast steel or steel plate boring cooling stave, then, damage easily in the high regional cooling power deficiency of localized heat intensity of flow.Employing has the superposed type cooling stave of independent cooling structure, can change according to heat flow rate per unit area,, both satisfy blast furnace refrigerative needs at the stronger copper overlapping layers wall body 1 of the higher regional superimposed cooling power of heat flow rate per unit area, realize the purpose of blast furnace longevity, can reduce cost of investment again.
(5) adopt the described superposed type cooling stave of technical solution of the present invention can make the blast furnace held stationary type of furnace smoothly.The equipping rules of blast-furnace body cooling apparatus is the cooling apparatus by the different cooling performances of size configure of heat flow rate per unit area in the stove, the mixed configuration structure that objectively has copper cooling wall and cast iron, cast steel or steel plate boring cooling stave and deposit.But copper cooling wall thickness with respect to cast iron or cast steel cooling wall thin thickness many, therefore, keeping under the conforming condition of cooling stave hot side, can there be the uneven gap of size between the huyashi-chuuka (cold chinese-style noodles) of existing copper cooling wall and the shell of blast furnace, be easy to generate huyashi-chuuka (cold chinese-style noodles) and scurry gas fluid in blast furnace, damage the cooling stave base member, cause the cooling stave distortion, the safety in utilization that threatens cooling stave.Adopt superposed type cooling stave of the present invention owing on total thickness, can be consistent with cast iron or cast steel cooling wall, therefore can eliminate above-mentioned drawback, because overlapping layers wall body 1 reduced thickness can be made camber by the shell of blast furnace shape, constitute the blast furnace design of steady and smooth simultaneously.
In sum, owing to adopt technical solutions according to the invention, particularly adopt base layer wall body 2 and overlapping layers wall body 1 respectively to offer this novel concepts of separate cooling channel, make the present invention have good cooling results, save copper material, cost is low, and is safe and reliable waits beneficial effect.
Four, description of drawings:
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is the A face view of Fig. 1;
Fig. 3 is the B face view of Fig. 1;
Fig. 4 is the C face view of Fig. 1;
Fig. 5 is the D-D sectional view of Fig. 1;
Fig. 6 is the E-E part sectioned view of Fig. 2;
Fig. 7 is the structural representation of the embodiment of the invention 2;
Fig. 8 is the F face view of Fig. 7;
Fig. 9 is the G face view of Fig. 7;
Figure 10 is the H-H sectional view of Fig. 7;
Figure 11 is the structural representation of the embodiment of the invention 3;
Figure 12 is the I face view of Figure 11;
Figure 13 is the J face view of Figure 11;
Figure 14 is the K-K sectional view of Figure 11;
Among the figure: 1, overlapping layers wall body; 2, base layer wall body; 3, bolt; 4, cooling channel T; 5, paddle hole; 6, through hole; 7, water inlet pipe and water outlet pipe; 8, pad; 9, high heat conduction stopping composition; 10, cooling channel U; 11, cross-sectional shape V; 12, cross-sectional shape W;
Embodiment:
Five, embodiment;
Embodiment 1: referring to figs. 1 through Fig. 6, in the embodiment of the invention 1, extremely shown in Figure 6 as Fig. 1, described superposed type cooling stave comprises base layer wall body 2 and overlapping layers wall body 1, both superposed surfaces length and width sizes are consistent, adopt complete superimposed mode, are fastenedly connected by joint bolt 3.Overlapping layers wall body 1 is by copper coin boring processing and manufacturing, and the cross-sectional shape V11 of its cooling channel T4 is compound hole shape or other passes.Base layer wall body 2 is by the cast iron manufacturing, and its inside has cooling channel U10, and its cross-sectional shape W12 is circular or other passes.Be lined with pad 8 between overlapping layers wall body 1 and the base layer wall body 2, described pad 8 is double-deck pad, and the gap between the double-deck pad is filled with high heat conduction stopping composition 9.Cooling channel T4 and cooling channel U10 exceed with the thickness that is not less than water inlet pipe and water outlet pipe 7 to the distance on wall body surface separately.Because overlapping layers wall body 1 and base layer wall body 2 have independently cooling structure separately, guaranteed the security that the superposed type cooling stave uses.Simultaneously owing to there is the high strength of base layer wall body 2 to support, the thickness that makes overlapping layers wall body 1 is attenuate greatly.Present embodiment can be used for blast furnace cooling stave or other high temperature wall body cooling apparatuss.
Fig. 2 is an A face view among Fig. 1, has represented distribution and the shape of the cooling channel U10 of base layer wall body 2, and the position of joint bolt 3.
Fig. 3 is a B face view among Fig. 1, has represented distribution and the shape of the cooling channel T4 of overlapping layers wall body 1, and the position of joint bolt 3.
Fig. 4 is a C face view among Fig. 1, has represented the connection state of overlapping layers wall body 1 with base layer wall body 2.
Fig. 5 is the D-D sectional view of Fig. 1, has represented the cross-sectional shape V11 of the cooling channel T4 of overlapping layers wall body 1.
Fig. 6 is the E-E part sectioned view of Fig. 2, has represented the cross-sectional shape W12 of the cooling channel U10 of base layer wall body 2.
Embodiment 2: with reference to Fig. 7, Fig. 8, Fig. 9, Figure 10, in the embodiment of the invention 2, as shown in Figure 7, described superposed type cooling stave comprises an overlapping layers wall body 1 and a base layer wall body 2, adopts the superimposed mode of part, and overlapping layers wall body 1 is superimposed with base layer wall body 2 tops, because blast-furnace tuyere district temperature is higher, if adopt complete cast-iron cooling wall, then cooling stave top is damaged easily because of being in the air port band that circles round, and the requirement of blast furnace longevity can be satisfied because of refractory masses protection is arranged in the bottom; Now adopt the local superimposed superposed type cooling stave of independent cooling structure, both can improve tuyere zone cooling stave safety in utilization, again can attenuate copper cooling wall thickness, reduce cost, embodiment 2 can be used for blast-furnace tuyere district cooling stave or other high temperature wall body cooling apparatuss; The embodiment of the invention 2 all the other conditions and effect are with embodiment 1.
Embodiment 3: with reference to Figure 11, Figure 12, Figure 13, Figure 14, in the embodiment of the invention 3, as shown in figure 11, described superposed type cooling stave comprises a plurality of overlapping layers wall bodies 1 and a base layer wall body 2, adopt the superimposed mode in multi-section position, be fastenedly connected by joint bolt 3.Adopt present embodiment can realize the technique effect that heat flow rate per unit area is complementary in local cooling intensity of cooling stave and the blast furnace, change according to heat flow rate per unit area, at the high strong copper cooling wall of regional superimposed cooling power of heat flow rate per unit area, blast furnace refrigerative needs had both been satisfied, realize the purpose of blast furnace longevity, can reduce cost of investment again; Embodiment 3 can be used for blast furnace stack middle part cooling stave or other high temperature wall body cooling apparatuss.The embodiment of the invention 3 all the other conditions and effect are with embodiment 1 or embodiment 2.
The present invention includes but be not limited to the described embodiment of the foregoing description, also can design other embodiments in conjunction with concrete applicable cases according to technical solutions according to the invention.
Claims (7)
1. superposed type cooling stave, comprise base layer wall body (2), superimposed overlapping layers wall body (1) and water inlet pipe and water outlet pipe (7) on base layer wall body (2) hot side, it is characterized in that: described overlapping layers wall body (1) and base layer wall body (2) are respectively arranged with the cooling channel T (4) of overlapping layers wall body (1) and the cooling channel U (10) of base layer wall body (2), respectively offer the paddle hole (5) that is connected cooling channel T (4) and cooling channel U (10) on the huyashi-chuuka (cold chinese-style noodles) of overlapping layers wall body (1) and base layer wall body (2), described water inlet pipe and water outlet pipe (7) is connected with paddle hole (5), with offer the through hole (6) that can pass on the pairing base layer wall body of paddle hole (5) (2) of overlapping layers wall body (1) for the water inlet pipe and water outlet pipe (7) of overlapping layers wall body (1), described through hole (6) is spaced from each other with the cooling channel U (10) of base layer wall body (2), guarantees reasonable safe distance between the two.
2. superposed type cooling stave according to claim 1, it is characterized in that: described base layer wall body (2) is made by cast iron, cast steel or steel plate, by the base layer wall body (2) that cast iron or cast steel are made, it is round or oblate pass or polygon pass that its cooling channel U (10) becomes cross-sectional shape W (12) by casting processing; By the base layer wall body (2) that steel plate is made, its cooling channel U (10) is processed into cross-sectional shape W (12) for round or justify overlapped pass by boring more.
3. superposed type cooling stave according to claim 1, it is characterized in that: described overlapping layers wall body (1) is made by cast copper or fine copper plate, by the overlapping layers wall body (1) that cast copper is made, it is round or oblate pass or polygon pass that its cooling channel T (4) becomes cross-sectional shape V (11) by casting processing; By the overlapping layers wall body (1) that copper coin is made, its cooling channel T (4) is processed into cross-sectional shape V (11) for round or justify overlapped pass by boring more.
4. superposed type cooling stave according to claim 1 is characterized in that: described base layer wall body (2) is fixedlyed connected by bolt (3) or flute profile with overlapping layers wall body (1).
5. superposed type cooling stave according to claim 1 is characterized in that: the hot side integral body of described base layer wall body (2) is superimposed with overlapping layers wall body (1), or the part is superimposed with overlapping layers wall body (1) or the multi-section position is superimposed with overlapping layers wall body (1).
6. superposed type cooling stave according to claim 1 is characterized in that: be provided with pad (8) between described base layer wall body (2) and the overlapping layers wall body (1).
7. superposed type cooling stave according to claim 6 is characterized in that: described pad (8) is the single or multiple lift pad, and the gap between each layer of multi-layer gasket is filled with high heat conduction stopping composition (9).
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| CNB2007100262926A CN100465290C (en) | 2007-01-12 | 2007-01-12 | Laminated cooling walls |
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| CNB2007100262926A CN100465290C (en) | 2007-01-12 | 2007-01-12 | Laminated cooling walls |
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| CN101020932A true CN101020932A (en) | 2007-08-22 |
| CN100465290C CN100465290C (en) | 2009-03-04 |
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Cited By (7)
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| CN104789722A (en) * | 2015-04-14 | 2015-07-22 | 江阴兴澄特种钢铁有限公司 | Blast furnace body structure for facilitating lining making through grouting |
| CN104789723A (en) * | 2015-04-14 | 2015-07-22 | 江阴兴澄特种钢铁有限公司 | Blast furnace body structure and grouting liner-repairing method thereof |
| CN105486087A (en) * | 2015-10-13 | 2016-04-13 | 常州市武进顶峰铜业有限公司 | Metallurgical high-temperature kiln casting copper cooling wall |
| CN106065424A (en) * | 2016-08-25 | 2016-11-02 | 陈学红 | A kind of blast furnace cooling stave |
| CN108588314A (en) * | 2018-04-03 | 2018-09-28 | 莱芜市天铭冶金设备有限公司 | A kind of pre- poling cast-iron cooling wall of high-efficiency long-life and its manufacturing process |
| CN111334629A (en) * | 2020-01-03 | 2020-06-26 | 中冶华天工程技术有限公司 | Cooling wall structure for improving cooling strength of blast furnace |
| CN112143842A (en) * | 2020-10-10 | 2020-12-29 | 上海宝钢铸造有限公司 | Movable fixing device for second-layer cooling pipe of cooling wall |
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| KR100327191B1 (en) * | 1996-07-09 | 2002-03-13 | 아사무라 타카싯 | Stave for cooling of blast furnace walls and method of manufacturing same |
| JP4495330B2 (en) * | 2000-10-27 | 2010-07-07 | 新日鉄エンジニアリング株式会社 | Cooling panel for blast furnace wall |
| CN1164771C (en) * | 2002-01-23 | 2004-09-01 | 张昭贵 | Bimetal cooling wall and its production method |
| CN2542674Y (en) * | 2002-04-18 | 2003-04-02 | 何汝生 | Combined composite cooling wall |
| EP1391521A1 (en) * | 2002-08-20 | 2004-02-25 | Voest-Alpine Industrieanlagenbau GmbH & Co. | Cooling plate for metallurgical furnace |
| JP3686642B2 (en) * | 2002-09-05 | 2005-08-24 | 新日本製鐵株式会社 | Cast copper stave cooler structure |
| CN1517444A (en) * | 2003-01-16 | 2004-08-04 | 周南夫 | Blast furnace cooling wall composed of copper and iron-containing alloy |
| CN2848861Y (en) * | 2005-09-16 | 2006-12-20 | 张殿有 | Composite cooling wall |
| CN100457923C (en) * | 2006-03-31 | 2009-02-04 | 南京钢铁联合有限公司 | Low thermal resistance cast-iron cooling wall and manufacturing method thereof |
| CN201010658Y (en) * | 2007-01-12 | 2008-01-23 | 汕头华兴冶金备件厂有限公司 | Overlapping cooling wall |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789722A (en) * | 2015-04-14 | 2015-07-22 | 江阴兴澄特种钢铁有限公司 | Blast furnace body structure for facilitating lining making through grouting |
| CN104789723A (en) * | 2015-04-14 | 2015-07-22 | 江阴兴澄特种钢铁有限公司 | Blast furnace body structure and grouting liner-repairing method thereof |
| CN105486087A (en) * | 2015-10-13 | 2016-04-13 | 常州市武进顶峰铜业有限公司 | Metallurgical high-temperature kiln casting copper cooling wall |
| CN106065424A (en) * | 2016-08-25 | 2016-11-02 | 陈学红 | A kind of blast furnace cooling stave |
| CN108588314A (en) * | 2018-04-03 | 2018-09-28 | 莱芜市天铭冶金设备有限公司 | A kind of pre- poling cast-iron cooling wall of high-efficiency long-life and its manufacturing process |
| CN111334629A (en) * | 2020-01-03 | 2020-06-26 | 中冶华天工程技术有限公司 | Cooling wall structure for improving cooling strength of blast furnace |
| CN112143842A (en) * | 2020-10-10 | 2020-12-29 | 上海宝钢铸造有限公司 | Movable fixing device for second-layer cooling pipe of cooling wall |
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| CN100465290C (en) | 2009-03-04 |
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Owner name: SHANTOU HUAXING METALLURGICAL EQUIPMENT CO., LTD. Free format text: FORMER NAME: SHANTOU HUAXING METALLURGIC PART CO., LTD. |
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Address after: 515063 Lu Rongsheng Science Park, Jinping University, Guangdong, Shantou Patentee after: Shantou Huaxing Metallurgical Equipment Co., Ltd. Address before: 515000 Huaxing metallurgical spare parts factory Co., Ltd. of Shantou science and Technology University of Guangdong Patentee before: Shantou Huaxing Metallurgic Part Co., Ltd. |