Completion for JSW Steel Dolvi No.1 Blast Furnace Revamping

Press Release December 1, 2016

NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.

Marubeni Corporation

Completion for JSW Steel Dolvi No.1 Blast Furnace Revamping Project

NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD. (Representative Director and President: Mr.

Shinichi Fujiwara) Plant & Machinery Division (“NSENGI”) and Marubeni Corporation (President and

CEO: Mr. Fumiya Kokubu), together with NSENGI’s Indian Subsidiary, NIPPON STEEL & SUMIKIN

ENGINEERING INDIA Pvt. Ltd. (“NSEI”(※1)) have successfully completed the Dolvi No.1 Blast Furnace

Revamping Project awarded by JSW Steel Limited (※2), the largest private steel producer in India. The

Dolvi No.1 blast furnace achieved a successful blow-in on March 7 2016, and reached a production

output of 9,500t/d in September 2016. The Dolvi No.1 blast furnace is currently fully operational.

For many years NSENGI has developed blast furnace relining technology from “Strip Method” to “Block

Method” in order to minimize the shutdown period of the blast furnace. However, in this new project,

NSENGI has applied the world’s first “Single Block Method” in order to achieve the possibility of further

shutdown period minimization. This Single Block Method enables the upgrading of blast furnace from the

2,000 ㎥ class to the 4,000 ㎥ class by the simple replacement of the furnace body linked with the

tower structure as ‘a single block’, which has a weight of approximately 9,000 t, and a size of 20mL x

20mW x 45mH – about the same as a 15-storey building.

This Single Block Method enables the shortening of the most critical phase of the blast furnace relining,

which involves dismantling the existing blast furnace and installing the new blast furnace, to only 4 days

of pull-in and pull-out as a single block, unlike the conventional Block Method which requires 15 days. In

addition, the conventional blast furnace relining work normally reuses the tower structure which

constrains the size of the new blast furnace body. However, this new method enables the expansion of

blast furnace volume without any restriction from the tower structure, thus providing further possibilities

in comparison to the conventional methods.

NSENGI has a track record of more than 75 blast furnace revamping/upgrading projects. We aim to

meet the requirements of our customers by reducing the time required for blast furnace relining and by

further evolving our relining method. We are dedicated to play a world leading role in the technology

development for the industry.

Strip-Method: Relining with dividing the furnace body into strip-shaped pieces

(New BF will be constructed after completion of dismantling existing BF)

Block Method: Relining with dividing the furnace body into blocks

(Minimize schedule by pre-assembled four pieces of BF blocks)

Single Block Method: Relining with BF and tower structure as ‘a single block’ without dividing the

furnace body

(Minimize schedule and expand without restriction of tower structure)

[Project Summary]

BF Capacity: Before relining : 2,581 ㎥  current capacity : 4,323 ㎥

Scope: Design and engineering

Main equipment supply (Top Charging & Cast House Equipment, etc.), fabrication and

erection (fabrication and construction of new blast furnace, dismantling of existing blast

furnace, roof elevation of existing cast house.)

※1. NIPPON STEEL & SUMIKIN ENGINEERING INDIA Pvt. Ltd. [Summary]

Established: July 2010

Location: Delhi

Capital: 75 Lacs Indian Rupee

Capital contribution ratio: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD. 99%

NS PLANT DESIGNING CORPORATION 1%

President: Mr. Takashi TAKEUCHI (assigned from NSENGI)

※2. JSW Steel Limited [Summary]

Location: Headquarters / Mumbai

Works / Vidyanagar, Dolvi, Salem, Vasind, Tarapurm, Kalmeshwar

Production: 12.56 million ton (2015FY)

Net Turnover: 36,202 Cr Indian Rupee (2015FY)

Product: Hot rolled, cold rolled, color coated products, galvanized, galvalume, etc.

Block Method

Single Block Method

Shell

Staves

3 ~ 4 Blocks

Shell

Refractory

Center Hole Jack

Existing

Tower

Structure

New

Tower

Structure

Existing

Existing BF pull out ：58m

New

New BF 1

Pull in

：35m

New BF

Pull in

：30m