AUMUND to Supply DRI Hot Transport Conveyor to JSW in India
09/18/2013 - AUMUND Fördertechnik GmbH is supplying a hot transport conveyor (HTC) for the direct charging of hot DRI into the electric arc furnace at JSW Toranagallu in Karnataka Province, India.
At the steel works, the HTC connects a Midrex DR shaft with the EAF. The primary link is a sealed gas atmosphere which enables hot DRI charging with very low loss of temperature and metallization. Compared with traditional charging methods, significant energy savings and productivity increases can be expected.
The HTC from AUMUND is comprised of a bucket apron conveyor type BZB-H-I 400/400 (axial distance:140m, lift: 58.5m), with a heat-insulated hood and an AUMUND seal gas system and drive. Delivery to India will take place in the third quarter of 2013. The conveyor is designed for the transport of HDRI up to 750°C with a conveying capacity of 165 t/h.
The AUMUND HTC conveyor links the direct reduction shaft furnace, in which the iron ore is reduced to iron, with the EAF. Through the direct connection of shaft furnace and EAF, productivity of the plant can be significantly increased. The opening of the EAF hood as well as charging with traditional buckets is dispensed with. With each smelting process several minutes are saved – which is considerable given the production process has been optimized over decades.
By dispensing with the hood opening, no further heat can escape in this time period. Compared with traditional material transport in buckets or tubs, temperature loss during transport is very low with the AUMUND conveyor.
The AUMUND HTC has been systematically optimized over the last few years with a focus on the requirements demanded by the harsh operating environments: The significantly improved seal in the buckets guarantees gentle transport under sealed gas. Thanks to the reduced ingress of false air, the danger of re-oxidation tends to zero. At the same time the operator can better optimize the proportion of carbon in the iron and as a result the metallization can be enhanced. The improved heat insulation leads to heat loss reduction during material transport. In the described case study the advantages of a hot material conveyor can be seen: All kinds of HDRI can be transported, ranging from very fine-grained material to very lumpy material. As there is no relative movement during transport in contrast to that of pneumatic conveyors, no additional fines are generated. The AUMUND HTC can be employed in any location where a direct link between direct reduction and EAF is possible.
Since the end of the 1990s, direct reduction has gained increased prominence as the process employed to produce pig iron from iron ore, to the exclusion of the traditional blast-furnace process. As a general rule, the direct proximity of pig iron production to steelworks offers a range of economic advantages: At the end of direct reduction the pig iron exhibits a high degree of metallization in solid form either as a bulk material (fines or lumpy), as a briquette (HBI) or compacted as non-uniform disks/plates (HCI). The hot DRI can be forwarded immediately for further processing in the steelworks. At JSW the bucket apron conveyor transports the hot DRI from the shaft furnace to the steel plant.
Similar conveying installations were also supplied to, among others, Posco in South Korea and Hadeed in Saudi Arabia; further installations are in the planning stages.
The AUMUND Group is active worldwide in the conveying and storage of raw materials and solid fuels. With technically sophisticated and innovative products the AUMUND Group is recognized as a market leader in continuous process applications demanding absolute reliability and availability. The manufacturing companies AUMUND Fördertechnik GmbH (Rheinberg, Germany), SCHADE Lagertechnik GmbH (Herne, Germany), SAMSON Materials Handling Ltd. (Ely, England), as well as AUMUND Logistic GmbH (Rheinberg, Germany) are consolidated under the umbrella of the AUMUND Group. In conjunction with the headquarters of the manufacturing companies, the global business is effectively supported through a total of eight dedicated sales/support locations in Asia, Europe, North and South America plus representatives and agents in over other 100 countries.
The HTC from AUMUND is comprised of a bucket apron conveyor type BZB-H-I 400/400 (axial distance:140m, lift: 58.5m), with a heat-insulated hood and an AUMUND seal gas system and drive. Delivery to India will take place in the third quarter of 2013. The conveyor is designed for the transport of HDRI up to 750°C with a conveying capacity of 165 t/h.
The AUMUND HTC conveyor links the direct reduction shaft furnace, in which the iron ore is reduced to iron, with the EAF. Through the direct connection of shaft furnace and EAF, productivity of the plant can be significantly increased. The opening of the EAF hood as well as charging with traditional buckets is dispensed with. With each smelting process several minutes are saved – which is considerable given the production process has been optimized over decades.
By dispensing with the hood opening, no further heat can escape in this time period. Compared with traditional material transport in buckets or tubs, temperature loss during transport is very low with the AUMUND conveyor.
The AUMUND HTC has been systematically optimized over the last few years with a focus on the requirements demanded by the harsh operating environments: The significantly improved seal in the buckets guarantees gentle transport under sealed gas. Thanks to the reduced ingress of false air, the danger of re-oxidation tends to zero. At the same time the operator can better optimize the proportion of carbon in the iron and as a result the metallization can be enhanced. The improved heat insulation leads to heat loss reduction during material transport. In the described case study the advantages of a hot material conveyor can be seen: All kinds of HDRI can be transported, ranging from very fine-grained material to very lumpy material. As there is no relative movement during transport in contrast to that of pneumatic conveyors, no additional fines are generated. The AUMUND HTC can be employed in any location where a direct link between direct reduction and EAF is possible.
Since the end of the 1990s, direct reduction has gained increased prominence as the process employed to produce pig iron from iron ore, to the exclusion of the traditional blast-furnace process. As a general rule, the direct proximity of pig iron production to steelworks offers a range of economic advantages: At the end of direct reduction the pig iron exhibits a high degree of metallization in solid form either as a bulk material (fines or lumpy), as a briquette (HBI) or compacted as non-uniform disks/plates (HCI). The hot DRI can be forwarded immediately for further processing in the steelworks. At JSW the bucket apron conveyor transports the hot DRI from the shaft furnace to the steel plant.
Similar conveying installations were also supplied to, among others, Posco in South Korea and Hadeed in Saudi Arabia; further installations are in the planning stages.
The AUMUND Group is active worldwide in the conveying and storage of raw materials and solid fuels. With technically sophisticated and innovative products the AUMUND Group is recognized as a market leader in continuous process applications demanding absolute reliability and availability. The manufacturing companies AUMUND Fördertechnik GmbH (Rheinberg, Germany), SCHADE Lagertechnik GmbH (Herne, Germany), SAMSON Materials Handling Ltd. (Ely, England), as well as AUMUND Logistic GmbH (Rheinberg, Germany) are consolidated under the umbrella of the AUMUND Group. In conjunction with the headquarters of the manufacturing companies, the global business is effectively supported through a total of eight dedicated sales/support locations in Asia, Europe, North and South America plus representatives and agents in over other 100 countries.
