Global first achieved: intensive thin, ultra-high-strength strip heat treatment line is outperforming the world in output and quality

A CISDI-Baosteel co-developed intensive heat treatment line broke through the following sectoral performance indicators for the processing of 2,050mm-specification thin, ultra-high-strength strips:

Monthly production of 7,199 tonnes of strips;

Line yield of 98.5%.

This global first at Baosteel has showcased superior quality and output, outshining China’s conventional lines.

“This powerful heat treatment line has created new profits for us, particularly from products thinner than 3 mm. It is outperforming in quality, profile, energy conservation and efficiency,” said a Baosteel spokesperson.

Since startup in 2022, the line’s output has doubled that of similar conventional lines (production is even greater for thin specifications in a range of 2-6mm) and has reduced carbon dioxide emissions by at least 30 per cent.

The line has achieved an annual production of 100,000 tonnes of thin, ultra-high-strength strips featuring thicknesses of 2- 6mm, widths of 900-1,700mm and a maximum tensile strength of 1,800 megapascals.

Its ultra-high-strength structural, wear-resistant, protective and low-stress tempered steel products are widely used by sectors producing machinery, tripper cars, heavy-duty trucks and armoured cars.

Smart small-calibre special tube rolling line is reaping huge dividends for Changqiang Steel

China’s first smart seamless tube manufacturing system at China’s Changqiang Steel is smashing steel records, thanks to CISDI.

All processes, from the tube rolling to pre-finishing, are under remote, centralised control and smart operation, based on a unified data platform.

CISDI built the Jiangsu Province company's smart seamless steel tube rolling line to an EPC mode.

The outer diameter 127mm tube rolling line was hot commissioned in June 2024 and features fully-centralised control.

Already, a variety of special steel tubes have been produced for sectors manufacturing petroleum casing, ultra-high-temperature and ultra-high-pressure critical boilers, corrosion-free pipelines and high-precision machinery.

Products boast the widest specifications in China, with outer diameters ranging from 32.0 to 114.3 (140.0) mm, wall thicknesses of 3.5 to 12 (16) mm and lengths of 6.0 to 13.0m.

The Changqiang line was designed to be ultra-competitive on cost and efficiency. Its ability to create multiple-length products to the maximum possible lengths significantly reduces metal wastage.

This method takes the mill’s annual production capacity to 280,000 tonnes, way beyond its designed 200,000-tonne capacity, and slashes manufacturing costs per tonne of tube by at least US$ 27.45, compared with similar mills.

The core tech and equipment developed and supplied by CISDI for the line comprises:

●       High-precision vertical Piercer Mill

●       High-quality 3-roll Mandrel Mill

●       Low-cutting-loss, large-tension Reducing Mill

●       High-rigidity 6-roll Straightening Mill

●       Fast-response equipment structures at the Mandrel Mill and the Straightening Mill

●       Hydraulic servo system

●       High-precision automation control system.

Innovative environmental-protection tech and equipment reduces energy consumption and lowers ignition loss by at least 0.5 per cent. It includes:

Blast furnace gas-based dual-regenerative reheating furnace;

Smart combustion model.

CISDI smashed records to build world-beating heavy plate rolling line in record time

——— Zhoukou’s production will be the world’s largest and widest-ranging

CISDI broke construction records to build the largest heavy plate rolling line in the world at Henan Steel’s Zhoukou plant in just 16 months.

This massive achievement enabled hot commissioning from the reheating furnace to the cooling bed in November 2024.

Stable slab reheating quality, strong descaling results, smooth mill rolling and cooling bed delivery have all been achieved.

The 1,376 metre-long plate rolling line is designed with two stands of mill trains, comprising of a 5,600mm Roughing Mill and a 5,500mm Finishing Mill.

Its entire length has a linear arrangement and features a direct connection between the rolling and finishing lines.

Built by CISDI on an EPC basis, it will have the largest production capacity in the world and produce the most complete range of specifications for a line of its kind.

The addition of the CISDigital^® industrial internet platform makes it China’s first such line to operate with digital and intelligent manufacturing methods.

CISDI equipment applied:

●       Smart slab reheating furnace

●       High-performance descaling box with an extra-large opening

●       Powerful hot segmented shear

●       Composite heavy-duty stepping cooling bed

●       Scratch-proof cross transfer conveyor.

CISDI’s smart ECIA-C stockyard increased HPG Dung Quất’s green, smart credentials

CISDI celebrated the successful completion of its largest ever smart stockyard project outside of China.

With a total length of 24 kilometres, the now operational stockyard was designed, supplied and technically-assisted by CISDI for Vietnam’s Dung Quất plant, which operates under the Hoa Phat Group.

The stockyard is playing an important part of the first step in Hoa Phat’s phase II programme.

It is operating with CISDI’s latest ECIA-C and digital technology and features an overpass scraper reclaimer and a light-weight triangular head frame.

Process and equipment standards are demonstrating high levels of reliability, energy conservation, environmental protection and smart production.

An annual receiving capacity of around 17.25 million tonnes is progressively being reached, accommodating ironmaking production demands of around 5Mtpy.