The 'Factory of the Future' by the Bohai Sea

On September 10, the 1^#360m² sintering machine in the sintering District of HBIS Group Tang Steel New District, which was contracted by TSIC, was officially put into operation. Li Baozhong, Deputy General Manager of HBIS Tang steel New District, Zhang Honghai, Director of Ironmaking Division, and Dong Wenjin, General Manager of TSIC, attended the commissioning ceremony.

Group photo of TSIC participating in

the commissioning ceremony

HBIS Tang Steel New District is a landmark project of HBIS Group’s transformation, upgrading and structural adjustment. TSIC as the “technical think tank” of HBIS Group, has adopted a forward-looking approach from the overall planning of the new district to the successive commissioning of various projects. TSIC’s design concept, advanced process technology, and low-carbon economical manufacturing process provide effective technical support for building HBIS Group Tang Steel New District into a model of Chinese green steel enterprises in the new era and a world-class new generation process steel manufacturing base.

Panoramic view of sintering District in Tang Steel New District

1#360m² sintering machine in Tang Steel New District

The sintering District is one of TSIC’s turnkey construction projects. In the design process, TSIC uses advanced technological processes and intelligent manufacturing, energy saving and consumption reduction, pollutant reduction Emission indicators have reached the leading level of domestic sintering plants of the same type.

Intelligent sintering technology

Main control room of sintering District in Tang Steel New District

The project uses the self-developed intelligent sintering expert system, which combines basic control and expert systems with a high degree of integration, smooth connection, reasonable sharing of functions, and realizes the self-diagnosis, self-repair and remote assistance of the intelligent system. Through the intelligent terminal model, intelligent water adding model, The coordination of multiple functional modules such as batching model and ignition energy-saving control forms the cornerstone of 'one-key sintering'.

High-efficiency water seal ring cooler technology

Ring cooler of sintering District in Tang Steel New District

The upper and lower parts of the high-efficiency and energy-saving water-sealed ring cooler is all sealed with water, and the air leakage rate is ≤5%. The air supply system with a large wind box structure can not only reduce the wind resistance, but also make the wind speed more reasonable, the wind pressure more uniform, and the sinter cooling effect is better. Therefore, the installed capacity of the cooling fan can be greatly reduced, and the energy saving effect is very obvious. Electricity is only 35%-40% of traditional sintering ring cooler.

Patented technology 'an integrated system for comprehensive utilization of sintering waste heat'

Outdoor scene of flue gas circulation of sintering machine in Tang Steel New District

Indoor scene of flue gas circulation of sintering machine in Tang Steel New District

The project applies the patented technology 'An integrated system for comprehensive utilization of sintering waste heat' independently developed by TSIC to comprehensively utilize the sintering waste heat. The sintering ignition furnace is used as combustion air to participate in the ignition to reduce fuel consumption, and the other part is used as the air for the flue gas circulation to increase the flue gas temperature and oxygen content. The sintering flue takes a total of 7 wind boxes from the head and the tail to circulate the flue gas, returning the flue gas to the sintering material surface to participate in the sintering process, achieving the goals of energy saving, emission reduction, consumption reduction, and production increase.

Advanced flue gas treatment technology

The flue gas purification system of the sintering machine adopts the activated coke flue gas treatment process. The activated carbon can realize the coordinated removal of multiple pollutants without secondary pollution such as desulfurization ash. The adsorbed sulfur dioxide and the produced crushed coke can be used as resources.

Silo Technology

Silo Technology of sintering District in Tang Steel New District

Considering the environmental protection policy in Tangshan District in winter, the sintering machine has a short-term suspension of production. In order to ensure the production of the blast furnace, it is necessary to build a large storage finished product silo. The finished product silo adopts silo technology, with 10 silos with a diameter of 21m and a total storage capacity of 70,000 tons. The silo is equipped with 2 mobile unloading car belts, which have the function of automatic searching and loading. A 50mm thick cast stone liner is set in the warehouse to ensure that the warehouse body is not worn.

Buffer hopper technology of fly ash batching scale

Quicklime batching scale of sinter batching room in Tang Steel New District

In order to prevent the ash material from spraying, the impeller feeder under the quicklime, light burned dolomite, and dust removal ash bin is set to frequency conversion, and a buffer hopper is set under the impeller feeder, and is equipped with a weighing sensor. The ash is fed to the drag belt scale through the gate under the hopper. It not only ensures the uniform material feeding, but also solves the problem of material splashing.

Efficient and wear-resistant pneumatic conveying technology

Both the pneumatic conveying elbow and the vertical discharge nozzle adopt ceramic fusion casting structure, which greatly improves the service life of the wear-resistant elbow. In addition to the conventional use for conveying quicklime, dust removal ash and other light materials, it can also be used for conveying limestone powder, dolomite powder, etc. Materials with large specific gravity and high hardness. The service life of ordinary wear-resistant pipelines is 2 to 3 months, and the service life of ceramic fusion-cast structure can reach 12 to 18 months.

The application of new processes and new technologies has reduced the overall energy consumption of the sintering process of the project by about 3.1kg/t of sintered ore, which can create economic benefits of about 13.4 million yuan per year; the maximum emission reduction of sintering flue gas is 25%; the emission of CO from sintering flue gas is reduced 9.7%, NOx reduction by 18.4%; NOx reduction by 212t/year, SO₂ reduction by 172t/year, and savings of 1.83 million yuan/year (solid fuel consumption is reduced by 3.1kg/t of sinter); flue gas circulation system The commissioning increased the output of the sintering machine by about 7%.

TSIC has fully adopted 3D BIM technology in the project design of the HBIS Tang Steel New District, during innovating in process and technology, truly realizing 3D digital factory design.