James G. Speight Ph.D., D.Sc., in Natural Gas (Second Edition), 2019. 8.5.1 Iron sponge process. An example of a hydrogen sulfide scavenger process is the iron sponge process (also called the dry box process), which is the oldest and still the most widely used batch process for sweetening of natural gas and natural gas liquids (Anerousis and Whitman, 1984).
Get Price
Input iron ore: Input iron ore is in form of cooked pellet in this process and high grade hematite iron ore can be used to a certain extent depending on its condition. Reducing agent: Natural gas is broken after the reforming process. In the Midrex process, carbon monoxide gas has a larger share than hydrogen gas in the reducing gas mixture.
Get Price
DRI, also known as sponge iron, is the product of reducing iron oxide in the form of iron ore and steel plant wastes into metallic iron, below the melting point of iron and typically in the range of 800–1200 °C. Iron oxide is charged into shaft furnace, rotary kiln, or fluidized beds in the form of pellet, iron ore lumps, or fines. The reduction takes place using gaseous reductants (CO + H ...
Get Price
30000 tpaTons per Annum capacity was set up with.Process Description of Sponge Iron Plant. The coal based direct reduction process is more commercially viable and is currently in use in India. sponge iron plant process Rotary Kiln Unit.and Sunflag Iron Steel Ltd4. The first gas based sponge iron …
Get Price
cooling tower capacity is reduced by 37.2%. Due to 27.8% less profit for Case-1 in comparison to Case-2 ... Coal-based sponge iron process ... gas throughout the process is generated by an induced draft (ID) fan located near the chimney.
Get Price
The iron-sponge process generally uses a single vessel to contain the hydrated ferric oxide wood shavings. A drawing of an iron-sponge unit showing typical provisions for internal and external design requirements was presented in Figure 7-3.
Get Price
The process of sponge iron making aims to remove the oxygen from iron ore. The quality of sponge iron is primarily ascertained by the percentage of metallization (removal of oxygen), which is the ratio of metallic iron to the total iron present in the product. Sponge iron manufacture is highly sensitive to raw material characteristics.
Get Price
7. Sponge Iron units do not use the pollution control equipment. Source: WBPCB,2011. 33 34. West Midnapore, CSE Report • People’s movement very strong against the sponge iron industry especially Rashmi Cement/ Ispat in 2009, in West Midnapore. • Maoist politics emerged solely due to pollution from sponge iron plants in West Midnapore.
Get Price
The process of direct reduction . The process of direct reduction is carried out in a rotary kiln where the operating temperatures are maintained in a range from 1,000 deg C to 1,100 deg C. The product of the kiln (DRI and char mix) is then cooled in a rotary cooler with external water cooling system.
Get Price
and coal gas refined in coal gasifiers, as well as widely-used natural gas, may be used as reducing gases. u NSENGI, Tenova-HYL and Danieli concluded a strategic alliance agreement for the joint development of DRI steel production plant and expansion of the market of DRI in September 2013. Direct Reduced Iron (DRI) Production Plant
Get Price30000 tpaTons per Annum capacity was set up with.Process Description of Sponge Iron Plant. The coal based direct reduction process is more commercially viable and is currently in use in India. sponge iron plant process Rotary Kiln Unit.and Sunflag Iron Steel Ltd4. The first gas based sponge iron …
Get Priceand coal gas refined in coal gasifiers, as well as widely-used natural gas, may be used as reducing gases. u NSENGI, Tenova-HYL and Danieli concluded a strategic alliance agreement for the joint development of DRI steel production plant and expansion of the market of DRI in September 2013. Direct Reduced Iron (DRI) Production Plant
Get Price
This product is known as direct reduced iron (DRI) or sponge iron. ... DR processes can be broadly classified into two groups: (1) coal-based DR process and (2) gas-based DR process.
Get Price
Thus, Case-2 is selected as best proposed design.Highlights Present work deals with two design modifications proposed for sponge iron plant. First design accounts for preheating of kiln air using waste gas exiting from ESP. For second design water is heated using hot sponge iron to preheat rotary kiln air. A model is developed to compute coal demand of process based on different factors. For ...
Get Price
Originally developed to remove sulfur compounds from coke-oven gas, Connelly-GPM, Inc. Iron Sponge is now used around the world to treat natural gas, sewer gas, landfill gas, methane manufactured from biogas digesters, and a variety of other air and gas sources.
Get Price
The process reduces iron ore using a reforming gas made from natural gas. The DRI is used mainly as the raw material for electric arc furnaces (EAFs), as a clean iron source substitute for scrap iron. Pores are left behind in the DRI after oxygen has been removed. These pores, if filled with water, for example, can cause the iron to reoxidize with
Get Price
Iron Sponge Process. The iron sponge process uses the chemical reaction of ferric oxide with H2S to sweeten gas streams. This process is applied to gases with low H2S concentrations (300 ppm) operating at low to moderate pressures (50-500 psig). Carbon dioxide is not removed by this process.
Get Price
10.Auto control of operation of cooling tower fan with sponge temperature. ... Indirect cooling of product from 1050°C to 100°C. 17 17 ... FLUE GAS POWER SPONGE IRON PIG IRON C C M Rolling Mill FINISHED Products Mill Scale BF Flue Dust LD Sludge Coke Fines Binders Iron Ore Fines POWER
Get Price
The process operates continuously and only requires a periodical inspection and cleaning of some internal components to ensure optimum efficiency and performance. Dry Scrubbing Catalyst (DSC) Process. The DSC process is based on the property of iron sponge to convert to iron pyrite in the presence of hydrogen sulfide.
Get Price
SulfaTreat process is similar to the iron sponge process. It uses a patented proprietary mixture of ferric oxide and triferric oxide to react with H2O to sweeten gas streams. In SulfaTreat process the iron oxides are supported on the surface of an inert, inorganic substrate forming a granular material, while in the iron sponge process the ferric oxide is impregnated on wood chips.
Get PriceSulfaTreat process is similar to the iron sponge process. It uses a patented proprietary mixture of ferric oxide and triferric oxide to react with H2O to sweeten gas streams. In SulfaTreat process the iron oxides are supported on the surface of an inert, inorganic substrate forming a granular material, while in the iron sponge process the ferric oxide is impregnated on wood chips.
Get PriceOriginally developed to remove sulfur compounds from coke-oven gas, Connelly-GPM, Inc. Iron Sponge is now used around the world to treat natural gas, sewer gas, landfill gas, methane manufactured from biogas digesters, and a variety of other air and gas sources.
Get Price10.Auto control of operation of cooling tower fan with sponge temperature. ... Indirect cooling of product from 1050°C to 100°C. 17 17 ... FLUE GAS POWER SPONGE IRON PIG IRON C C M Rolling Mill FINISHED Products Mill Scale BF Flue Dust LD Sludge Coke Fines Binders Iron Ore Fines POWER
Get Price
Flue gas Fly ash Fines of iron ore 108.94 t/h Kiln Feeding Iron ore: 30 t/h Feed coal: 14.297 t/h Dolomite (Lime stone): 0.5 t/h All at 300C 0 Rotary Cooler At 1200C Sponge iron: 20.83 t/h Char: 2.8 t/h Spent lime: 0.175 t/h Ash : 1.617 t/h Water: 750 m3/h at 300C (30 m3/h water evaporates) 720 m3/h water goes to cooling tower at 34.90C DSC
Get Price
Design Procedures For Iron Sponge Unit. The iron-sponge process generally uses a single vessel to contain the hydrated ferric oxide wood shavings. A drawing of an iron-sponge unit showing typical provisions for internal and external design requirements was presented in Figure 7-3. The inlet gas line … Continue reading → 19.
Get Price
The sponge iron process, ... into large ceramic tubes and passing these through a gas-fired tunnel kiln on a... >> Get Quotation. Tunnel Kiln Technology for Sponge Iron Company ... CASE Cooling Tower |CASE ..... equipment for coal gasification projects, cooling tower construction, DRI tunnel kiln, iron …
Get Price
Keywords: Inhibition of Reoxidation, Waxing Process, Sponge Iron, Metallization, Fines 1. Introduction The industry of direct reduced iron (DRI) is appeared at ... through cooling towers by using cold nitrogen gas . The disadvantages of this process are ,sodium silicate which coated the pellets is soluble in water ,thus when DRI exposed
Get Price
The direct reduction process. HBI is the product of reducing iron ore with natural gas. This is called the direct reduction process and is an environmentally-friendly production process; a DRI plant uses natural gas which is more environmentally sound than coke. The reduction process takes place in the reduction tower.
Get Price
Midrex Process for Direct Reduction of Iron Ore. Midrex is an ironmaking process, developed for the production of direct reduced iron (DRI). It is a gas-based shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.
Get Price
Within the acid range (pH <4), the iron oxide film is continually dissolved. In cooling water, the potential for calcium carbonate precipitation increases with higher pH and alkalinity; thus the corrosion rate decreases slightly as pH is increased from 4 to 10. Above pH 10, iron becomes increasingly passive.
Get Price