Title

50-MPS IN COOLING BED TO ENHANCE PROFITABILITY IN REBAR PRODUCTION

50-MPS IN COOLING BED TO ENHANCE PROFITABILITY IN REBAR PRODUCTION

Authorship

Taurino, Andrea; Tambosco, Luigi

Taurino, Andrea

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Tambosco, Luigi

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DOI

10.5151/2594-5297-20729

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Abstract

Very high production rate for the smaller bars size range, in order to fully exploit the reheating furnace capacity, has always been a common goal for bar producers, worldwide. But, one of the most common way to reach this goal is to use the well-known Multi-strand Slit Rolling system, a combination of dedicated roll pass design and dedicated guiding equipment to shape and longitudinally separate the rolled stock into 2, 3 or 4 individual strands, rolled together as one single bar down to the final finished size. The alternative technology that will result in a real break-through innovation for the panorama of steel producers worldwide will be the ultra-high speed bar finishing rolling and delivery into the cooling bed through the Danieli HTC “High-speed Twin Channel”. This system, originally invented and patented by Danieli in the early 70’s of the past century, operates successfully worldwide since then with speeds that, from the original top speed of 20 mps of those years, has now reached the record speed of 50 mps in cooling bed. The HTC perfectly suits the latest generation high-production bar mills where smaller-size bars are slit at the pre-finishing continuous mill stands and are finished on two independent strands through two Delta-type high speed blocks. This paper introduces the technical characteristics of the ultra-high speed bar finishing rolling and delivery system as well as its main highlight and benefits (...among the most significant....the possibility of producing down to 6-mm-dia rebars at very high output rates).

Very high production rate for the smaller bars size range, in order to fully exploit the reheating furnace capacity, has always been a common goal for bar producers, worldwide. But, one of the most common way to reach this goal is to use the well-known Multi-strand Slit Rolling system, a combination of dedicated roll pass design and dedicated guiding equipment to shape and longitudinally separate the rolled stock into 2, 3 or 4 individual strands, rolled together as one single bar down to the final finished size. The alternative technology that will result in a real break-through innovation for the panorama of steel producers worldwide will be the ultra-high speed bar finishing rolling and delivery into the cooling bed through the Danieli HTC “High-speed Twin Channel”. This system, originally invented and patented by Danieli in the early 70’s of the past century, operates successfully worldwide since then with speeds that, from the original top speed of 20 mps of those years, has now reached the record speed of 50 mps in cooling bed. The HTC perfectly suits the latest generation high-production bar mills where smaller-size bars are slit at the pre-finishing continuous mill stands and are finished on two independent strands through two Delta-type high speed blocks. This paper introduces the technical characteristics of the ultra-high speed bar finishing rolling and delivery system as well as its main highlight and benefits (...among the most significant....the possibility of producing down to 6-mm-dia rebars at very high output rates).

Keywords

Cooling bed; Rebar production; Profitability.

Cooling bed; Rebar production; Profitability.