CISDI’s intelligent blast furnace energy conservation technology has been awarded the only accreditation given to steel industrial technology in 2017 by the National Development and Reform Commission.

It was listed in the National Key Energy-saving and Low-carbon Technological Promotion Directory 2017. The directory began in 2009 and has featured 32 steel-related technologies.

CISDI applied for five related core technologies, all of which are based on the bosh gas volume index:

High-efficiency and low-consumption theoretical system

Optimised blast furnace profile design by simulation

Structural technology for the optimised profile of a large blast furnace

Systematic energy conservation technology for a large blast furnace

Intelligent production management system for a large blast furnace,

These technologies are world leaders in terms of high efficiency and low consumption. They are capable of achieving an ideal fuel ratio of no more than 485kg/t and a gas utilisation efficiency of no less than 52% for a large blast furnace.

The composite package of energy conservation technology has been granted 19 patents for national-level inventions and 67 utility model patents.

They have been applied to 21 large blast furnaces with volumes of over 4,000m3 and 24 medium-sized blast furnaces with volumes range from 2,000m3 to 4,000m3. Remarkable economic and social returns have been produced.

Baosteel’s Blast Furnace 3 is a strong example. Its one-generation campaign service life is 19 years and the hot metal output is 15,700t per unit of volume.

During that service life, the average coke ratio is 302kg/t, coal ratio is 196kg/t and the fuel ratio 498kg/t - world-class high efficiency and low consumption targets.

CISDI’s technologies have also been applied to two blast furnaces at FHS, which each has a volume of 4,350m3 and at India’s TATA KPO blast furnace 2 (with a volume of 5,870m3).

CISDI expects to boost steel energy efficiency development around the globe with its blast furnace energy-saving advancements.

It predicts that in the next five years, 23% of blast furnace ironmaking production will opt to use this package in order to comply with green and intelligent upgrading trends.

The resulting energy savings would be vast - and would also lead to significant environmental benefits as a result of reductions in emissions.

Blast furnaces consume 60% of the energy used by the steel industry. A future investment of 5.37 billion USD in energy conservation technologies would save 3.24 million tce energies a year and reduce carbon dioxide emissions by 8.55 million tonnes a year.

Typical projects

Baosteel Zhanjiang 2x5,050m³ blast furnaces

Production capacity: 8Mt/a hot metal

Main equipment: blast furnace proper, no-bell top, high-temperature top-combustion stove, all made in China

Construction period: 30 months

Results: an annual energy saving of 396,000 tce, a reduction of carbon emission by 1.045Mt CO2, and an annual economic benefit of 50 million USD from saving energy

Anyang Steel No.3 blast furnace with a volume of 4,747m³

Production capacity: 3.8Mt/a hot metal

Main equipment: blast furnace proper, high-temperature top-combustion stove, blast furnace intelligent production management system

Construction period: 24 months

Results: an annual energy conservation of 137,000 tce, a reduction of carbon emission by 362,000t CO2 and an annual economic benefit of 17 million USD from saving energy