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Skateboard of converter slag technology development and innovation

Word:[Big][Middle][Small] 2015/11/14    Viewed:771    

One、An overview, 

With the development of national economy, user requirement for steel quality and the price is higher and higher, how to clean steel is a high efficiency and low cost production of iron and steel enterprise development, strives for the survival. And the converter steel slag with seriously affect the production cost of steel and steel cleanliness, therefore, developed a variety of the steel slag at home and abroad of the technology and facilities, but the application effect is not satisfactory, in recent years, new development and application of the skateboard slag technology is widely considered slag effect is more ideal, have created favorable conditions for high quality steel production. 
Ladle slide gate of casting steel converter tapping how to apply the technology, in the last century 60 ~ 70 s of the world's major developed countries tried iron and steel enterprise, but because of high input, replacement time is long, many factors affect the operation efficiency and high cost and suspended, but Germany saltz, special steel factory of 3 210 t converter in 1997 formally put into production. (it is said that the plant product is for Benz, BMW automobile manufacturers supply automobile steel plate). 

Arrived at the beginning of this century, China's metallurgical discovered the technology when the delegation visit to Germany, fujian three mount maanshan steel group in 2005, invited the rain skateboard metallurgy new material co., LTD in slag scientific research subject research. On January 1, 2006, maanshan rain metallurgy new material co., LTD. Production of the domestic first set of skateboarding slag, three steel in fujian on the 4 # 40 t converter heat test and succeed. Due to skateboard method of slag and slag dart ratio has obvious advantages, maanshan rain metallurgy new material co., LTD. Product quickly on November 1, 2006 in fujian province three steel 1 # 80 t converter is widely used. Fujian three steel group in 2007 as the domestic first slide block of converter slag technology successful application example, by the fujian provincial department of expert group, Chinese society for metals wen-xiu li, director of the committee of experts coalesced, on-site inspection appraisal, it has won third prize of scientific and technological progress in fujian province. 

On January 1, 2006, fujian three 4 # 40 t converter steel slag institutions with domestic first set of skateboard on November 1, 2006, fujian three steel 1 # 80 t converter slag with skateboard 

Fujian three successful application of converter steel group skateboard slag technology in the domestic metallurgical industry spread, and after many steel companies want to try, have to fujian three steel to visit guidance. In September 2008, baoshan iron and steel co., LTD., was carried out on the slide block of converter slag technology after full investigation, demonstration, test, invite maanshan rain metallurgy new materials co., LTD., together with their research and development, one after another in baosteel, one, two 300 t converter steelworks six on popularization and application, especially on the orientation of silicon steel smelting has made significant effect. To increase the rate of oriented silicon steel smelting, slag tapping the unused skateboard method using iron slag cap block before the slag, slag slag after dart block, still less used for steel operation to ensure the ladle slag. While using the slide method after steel slag, slag before close the slide block, for the converter steel slag after tapping hole area (converter tilting to 75 ~ 80 °) open a skateboard out of steel, can be all slag before plugging in the converter; When the finished steel slag under infrared detected close skateboard after steel slag, due to the fast speed, about 0.5 seconds can be fully closed, will be after slag in converter. After leaving no steel tapping, 5 t steel, more to a less against the 5 t hot metal, has a certain economic benefits. 

Maanshan Yushan New Metallic Materials Co., Ltd with baosteel skateboard slag tapping technology cooperation, the two sides in slag gate mechanism and application of continuous improvement innovation, offline replacement equipment and refractories many aspects has carried on the technological improvement, make the slide block of converter slag technology constantly improving, mature, has realized the automatic judgment slag and slag, promoted the smelting of steel the automation level of operation. Due to baosteel's successful application of the technology of slide block of converter slag, and created a remarkable economic benefits, which makes the converter slag tapping skateboard method technology is widely used in home, soon to become the converter steel slag of innovation and technology of China and the important method. 
Second, now the current situation of converter slag tapping skateboard method 

Currently, Maanshan Yushan New Metallic Materials Co., Ltd for 28 domestic steel 300 tons of 40 ~ 49 converter slag tapping transformed skateboard method, the total installed capacity of 9250 t performance (see table), combined with domestic brothers unit of generic popularization about 21 steel mills of the 37 converters, installed capacity of 5325 t, total about 49 mills, 86 converter, with a total installed capacity of 14757 t. Skateboarding in addition to domestic products, foreign converter slag plant products in the domestic application is less, only Interstop company shougang qianan region in China 2 210 t converter applied CG120 type quick change, four steel mill of masteel 300 t converter application type CG160 skateboard slag on the device. Now, China has become the global popularization and application of converter slag technology is the most common skateboard laws, also proved that the slide block of converter slag tapping technology has matured, become a slag of steel mills to accept the latest technology. 

Three main parameters and institutions 

Maanshan Yushan New Metallic Materials Co., Ltd., has developed several series of converter slag tapping device and skateboard method of refractory materials, applicable to all converter. 

Type

unit

ZZF-4ZHseries

ZZF-7F series

ZZF-7J series

YZL-3GY series

Institutional dimension

mm

1150×767×350

1365×854×400

1365×854×400

1285×882×365

Sluice brick size 
(length * width * thickness)

mm

600×310×50/75

710×350×50/80105

710×350×50/80105

660×360×60

Tapping hole size (D)

mm

120150

140150

140180

140160

Sliding distance(L

mm

230

230

270

230250

Spring number

number

8×2=16

8×2=16

8×2=16

8×2=16

Spring specifications

mm

63×81×13

63×82×14

63×82×14

63×82×13

Cold face pressure

t

11

14

14

13

Sluice brick replacement form

Offline change

Offline change

Offline change

Offline change

Apply converter

t

60150

150300

150350

120300

Four、Skateboards method of converter slag tapping reached level 

Type

unit

ZZF-4 series

ZZF-7 series

Apply converter

t

50150

150300

The success rate of slag

%

100

100

Change the time

second

10

15

Skateboards brick life behind (curtains)

stove

12

12

Closing time

minite

0.5

0.5

The converter steel slag to ladle slag thickness on average

40

40

Institutional life expectancy

tate

4000

4000


Five, the converter slag tapping skateboard method of technology innovation 

Domestic steel enterprises board method of converter slag tapping technology applications, the skateboard about 12 furnace service life time, so the slag gate mechanism about per shift change at a time. In order to improve the rhythm of the steel, reduce cost of per ton steel consumption, reduce the labor intensity of workers, the future of the slide block of converter slag technology still need to continue to innovate. 

Skateboard in the existing converter slag of refractory material, composite inlay zircon board are test-manufacturing research skateboards brick, while the production cost is higher, but still in gradually promote the use, also have achieved a certain benefits. See below: 

We believe that with the mature production technology, will in future to reduce the production cost, zirconium panels and further improve life inlay zircon plate composite skateboards brick, make price to rise, thereby the service life of existing common skateboard furnace 12 times up to 18 times, decrease The Times of slag gate institutions change to meet the needs of the fast rhythm of converter steelmaking, further reduce the cost of per ton steel consumption, to create greater economic benefits for our users to contribute. 


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