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Eastern Asia

Eastern Asia

  • Sinter Plant Heat Recovery (Steam Recovery from Sinter Cooler Waste Heat)

    Type: 
    Product
    Objective: 

    This device recovers the sensible heat in the hot air with temperature of 250 C to 450 C from a sinter cooler. It comprises mainly; a)boiler/economizer, b)pure water feed device, c)deaerator, d)steam drum, etc.
    After heat exchange with sintered ore of 500 C to 700 C in the cooler, the exhaust gas is introduced to the boiler/economizer to generate steam and is recycled to the cooler.

  • Coke Dry Quenching (CDQ)

    Type: 
    Product
    Objective: 

    The heat recovered by inert gas is used to produce steam, which may be used on-site or to generate electricity. Hot coke from the coke oven is cooled in specially designed refractory lined steel cooling chambers by counter-currently circulating an inert gas media in a closed circuit consisting of 1) cooling chamber, 2) dust collecting bunker, 3) waste heat boiler, 4) dust cyclones, 5) mill fan, 6) blowing device (to introduce the cold air from the bottom), 7) circulating ducts.

  • Sinter Plant Heat Recovery (Power Generation from Sinter Cooler Waste Heat)

    Type: 
    Product
    Objective: 

    This is a waste gas sensible heat recovery system from sinter cooler to generate electric energy. The system is composed of dust collector, waste heat recovery boiler as steam, circulation fan and power generator by steam turbine.
    The values of cost and effect are obtained from a system configuration of two identical sintering machines, coolers each equipped with waste heat recovery boiler and one unit of electric power generator, to which the steam from two boilers is led.

  • Top Pressure Recovery Turbine (TRT)

    Type: 
    Product
    Objective: 

    This system generates electric power by employing the heat and pressure of blast furnace top gas to drive a turbine generator. After the blast furnace gas is used in power generation, it is used as a fuel in iron and steel manufacturing processes. Blast fumace gas (BFG) has a pressure of 0.2-0.236 MPa (2-2.41 kg/cm2) and temperature of approx. 200 C at the fumace top.

  • Reverse osmosis membrane technology

    Type: 
    Product
    Objective: 

    Membrane which permeates solvent (water) but does not permeate solute (salt). In desalination, pressure up to 10MPa is applied to seawater which enables water to pass through the revere osmosis membrane, while the salt is excluded.

    Currently, two types of material are used: bridged aromatic polyamides, and cellulose acetate. Membranes must withstand high pressure and also be resistant to fouling.

  • Converter Gas Recovery Device

    Type: 
    Product
    Objective: 

    Molten steel is produced by the converter process. This device recovers and uses the high temperature waste gas generated in large quantity during blowing in the converter (basic oxygen furnace: equipment used to produce crude steel from pig iron, steel scrap, etc.). Accompanying this process, about 100Nm3 of high temperature gas (CO) with a heating value of approximately 2,000 kcal/Nm3 is generated.

  • Ecological and Economical Arc Furnace

    Type: 
    Product
    Objective: 

    Because the preheating shaft and melting chamber are directly and rigidly connected, the scraps are continually present from the steel to preheating areas. This enables high-temperature preheating of the scraps, resulting in a significant reduction of power consumption.
    The melting chamber is sealed off from outside air, to prevent the excess air inlet. It prevents over oxidation of scrap under high temperature preheating. As this equipment keeps always flat bath operation, electrode consumption is significantly improved.

  • Regenerative Burner Total System for reheating furnace

    Type: 
    Product
    Objective: 
    Technology: 

    An unit, Burner with Regenerator, ensures highly efficient, selectable thermal storage:

  • Vertical roller mill for raw materials

    Type: 
    Product
    Objective: 
    Technology: 

    The power consumption level of vertical roller mill is lower than that of tube (ball) mill. The feed is ground between the disc table and the rollers which are hydraulically pressed against a disc table. The remaining time of raw materials in vertical roller mill is much shorter than that in tube (ball) mill; therefore, the crushing process and mixing process became more harmonized and this contributes to quality control.

  • The new suspension preheaters burning system

    Type: 
    Product
    Objective: 
    Technology: 

    Although the suspension pre-heater (SP) system has good thermal efficiency, there were the problems about long time operation or capacity expansion because of the damage to the refractory inside. Then, the new suspension preheater (NSP) system equipped with a pre-calciner was developed in Japan.

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