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The secret of oven doors CPEX Blue Sky Technology introduction
Record of Russian Trip; Mr. Furukawa, General Manager, CPEX
Joining the DHOWA TECHNOS Group
CPEX Co., Ltd. joined the DHOWA TECHNOS Group in January 2015. DHOWA TECHNOS CO., LTD. has a history of trading with enterprises in Chelyabinsk, and has a local subsidiary in Russia. CPEX General Manager Mr. Furukawa and members of the DHOWA TECHNOS Overseas Sales Promotion Department had been pondering how DHOWA TECHNOS sales channels could be used to sell the CPEX Blue Sky coke oven doors to the Russian steel industry. "There are many steel works in Russia, and many of the oven doors that are used in these places are due to be upgraded because of aging. We felt that this was an opportunity to make them aware of the benefits of the CPEX Blue Sky coke oven doors, which have superior gas sealing properties and are environmentally friendly," says Mr. Furukawa.
Taking up the challenge of the Russian market
In September 2016, in extreme temperatures 20° below freezing, CPEX's Mr. Furukawa accompanied a team from DHOWA TECHNOS headed by Mr. Fujita, manager of the Overseas Sales Promotion Department, to eastern Russia to visit Magnitogorsk. Flying via Moscow, the journey from Japan to Magnitogorsk took approximately 22 hours, including airport waiting times. Due to the harsh environment which is below freezing point throughout the year, as well as jet lag, even making their way to the destination was by no means an easy trip. "This was our second trip to Magnitogorsk, as we had been there once before for Blue Sky PR. I was delighted to have the opportunity to meet them a second time," explains Mr. Furukawa.
First order from Russia
In October 2016, Mr. Furukawa's efforts came to fruition and Magnitogorsk placed an order for oven doors. As an initial trial, six sets have been created, and are to be delivered then put to use at the actual Magnitogorsk site. It is expected that if there are no problems, the remaining oven doors will also be replaced with Blue Sky in sequential order. The completed oven doors are currently being transported to Magnitogorsk. The company remains focused. "Blue Sky is like our child. We want our child to shine, so once the doors arrive, we will take responsibility for providing full support, including installation and ongoing maintenance." The challenge for Mr. Furukawa and DHOWA TECHNOS continues.
① Coke Oven Door "Blue Sky"
The origin of the naming of the Blue Sky coke oven doors The sky above steel works is always black from the smoke rising up. After switching the oven doors to Blue Sky, the sky returned to its natural color. Clear the clouds with Blue Sky.
② Features of the Blue Sky door
③ Protective parts around coke ovens and oven doors
Sample (spring)
No. Product name Specifications
1 Coil spring for adjusting SWOSC-B 7Φ x 30D x 152H x 12.5N
2 Coil spring for latch device SUP10 10T x 200φ x 92φ x 15.6H
3 Coil spring for lever door High-strength spring TM30 x 50
Springs have a significant influence on the performance of ovens. Use of inappropriate springs results in gas leaks.
Recommended replacement standard
Free length Replacement standard Decreased spring strength Standard useful life
Coil spring for adjusting 152mm -7mm -35.5kg 3 years
Coil spring for latch device (15 pieces) 234mm -3.5mm -1,000kg 10 years
Coil spring for lever door 50mm -3mm -34kg 3 years
 
Sample (cast product)
No. Product name Specifications
1 Brick holder Heat-resistant cast iron (FCH) 5.6 mH
2 Arm for lever door Nodular graphite cast iron (FCD450) 26 kg
3 Frame for lever door Heat-resistant cast iron (FCH) 82kg
 
Manufactured under strict quality management.
Heat-resistant cast iron Component analysis (%) Mechanical properties
FCH Component C Si Mn P S Ni Cr Mo Tensile strength Hardness/??
Min. 3.30 1.50 0.40 0.50 N/㎟ Brinel
Charge Max. 3.70 2.50 0.80 0.20 0.12 1.20 250.00 < 260
④ CPEX Co., Ltd. Company profile
Establishment CPEX succeeded in developing a superior technique for manufacturing Yamasaki coke oven doors, and began the design and manufacture of the Blue Sky door in 2008. Dhowa Technos purchased all stocks of CPEX in 2015. CPEX is active as a member of the Dhowa Technos Group.

1. Design and manufacture of coke oven door

1 ) For a new coke oven or extension 2 ) Replacement due to deterioration 3 ) To lower incidence of gas leakage

2. Supply of spare parts

1 ) Seal plate 2 ) Door jamb 3 ) Miscellaneous parts

3. Technical assistance

1 ) To solve gas leaks 2 ) Inspection of ? 3 ) Training in operation & maintenance

4. Development business


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