Factors affecting dioxin emissions from iron ore sintering machines have been investigated by means of sinter pot tests (Nakano et al., 2009). The bed height, coke content, gas velocity, and afterburner were found to have insignificant effects. However, dioxin emissions were found to increase as the hearth layer increased and the distance of ...
1 Introduction The purpose of the sintering process is to prepare qualified feed for blast furnace ironmaking, and the sintering efficiency and product quality are the focus of sintering process research.
Among the machine learning techniques, the [2] Mróz Jan, Skowronek Ryszard and Francik Przemysław, Random Forest model prediction algorithm was found to Investigations on the Influence of Return Sinter Fines on the Iron Ores Sintering Process and on the Properties of Iron Ore have a good fit with actual values.
Prior to dispatch of sinter to the blast furnace for hot metal production, the sinter product from the sinter cooler is screened to remove smaller/finer particles. The undersize so generated is called internal return fines, which are generally recirculated into the sintering machine. A very high level of internal return fines generation limits the use of ore for sintering which may ...
Iron ore sintering is a material preparation process employed worldwide in the production of iron and steel. According to statistical data on pollution, sintering plants rank second in terms of toxic emissions, after the incineration of municipal solid waste (Menad et al., 2006; Remus et al., 2013 ).
The basic hightemperature properties of iron ore play a crucial role in optimizing sintering and ore blending, but the testing process for these properties is complex and has significant lag time, which cannot meet the actual needs of ore blending. A prediction model for the basic hightemperature properties of iron ore fines was thus proposed based on a combination of machine learning ...
Sintering combines iron ore fines in the size range .1510 mm along with fluxes, solid fuel and various steel plant reverts to form iron ore sinter in the size range of 540 mm that can be charged into the blast furnace for production of pig iron. The quality of sinter has a strong influence on the productivity and fuel rate of the blast furnace.
This section describes sintering process, analyzes its characteristics, and introduces the carbon efficiency and thermal state parameters. Iron Ore Sintering Process. DwightLloyd sintering machine is adopted in sintering process, as shown in Fig. qualified sinter produced by the sintering process is utilized in the blast furnace process [].
According to the Environmental Protection Agency, the sintering process converts finesized raw materials, including iron ore, coke breeze, limestone, mill scale, and flue dust, into an agglomerated product, sinter, of suitable size for charging into the blast furnace.
The iron ore sintering process is the second largest energy consuming process next to the blast furnace in overall integrated steel plant value chain. Sintering consists of two moving beds, namely a sintering machine, and an annular cooler. Once the sintering is completed, hot sinter is discharged on the annular cooler and air is blown from the bottom with blowers for cooling the sinter to ...
Sintering is the most economic and widely used agglomeration process to prepare iron ore fines for blast furnace use. In this chapter, the sintering process is first described to identify the key steps of the process, that is, granulation and thermal densification.
Hydrogenrich gas and steam are widely regarded to be of great potential to mitigate CO 2 emissions in iron ore sintering, these gases can regulate heat distribution in the sintering machines by replacing fossil fuels. However, most sintering machines only use one of the gases as the injecting medium, the potential of this technology has not been developed.
In this case, the iron ore sintering process serves as the first step in the ironmaking process and provides the main raw material for the blast furnace. The sintering process consists of the following three phases (Er et al., 2000). First, the raw materials including iron ore, coke, coal, quick lime, returned sinter, and other additives are ...
References (69) ... 6,7) Iron ore sintering is an agglomeration process of a mixture of ore fines mainly consisting of iron ores, fluxes and fuel, which produces sinters with suitable chemical and ...
Fig. lR. L. Lloyd charging the first successful continuous sintering machine. Development of the DwightLloyd Sintering Process by H. E. Rowen As high grade iron ore deposits dwindle and costs rise, sin tering becomes more and more important. The steel indus try is now faced with beneficiation problems once peculiar
materials used in sintering are Iron ore fines, Coke breeze, Limestone, Dolomite, Sand, Metallurgical waste and Lime. Physical properties: Iron ore fines used for sintering should be of the size of 010 mm. More of ñ1 mm fraction will reduce bed permeability and will reduce the vertical speed of sintering reducing machine productivity.
The iron ore fines (− 10 mm) are agglomerated using Dwight Lloyed sintering machine. The iron ore fines and coke breeze fines mix with moisture is fed on the sinter bed which is ignited by a gas burner to initiate sintering process. The hot sintered ore is discharged at the end of the machine.
sintering, the welding together of small particles of metal by applying heat below the melting process may be used in steel manufacturing—to form complex shapes, to produce alloys, or to work in metals with very high melting a steelsintering plant a bed of powdered iron ore, mixed with coke or anthracite, is ignited by a gas burner and then moved along a traveling grate.
Superhigh bed sintering process is an important development direction of iron ore sintering for its lower emission and higher yield. However, there is a lack of deep understanding of the uneven quality of superhigh bed sintering products, and the deterioration of reduction disintegration performance, the thickening of hearth layer and the reduction in energysaving effect are perplexing ...
At the sintering machine only about 50 kg of fossil fuel per ton of sinter are used. Thus, new technologies are welcome with the focus of neutralizing the carbon emissions. The iron ore sinter process is an important operation unit in the integrated steel plant.
The iron ore pellet enters the shaft furnace from the top, through the stream M1 at ambient temperature. Impurities have an adverse impact on the reaction kinetics and should be limited to less than 5%. The iron ore pellets react with the hydrogen gas, which enters the shaft furnace from the bottom of the furnace at 1173 K, represented by M4.
In iron and steel industry, sintering process releases large amount and different kinds of pollutants. Most sintering plants had applied the dust removal system and the flue gas desulfurization (FGD) system for exhaust treatment in China. Previous studies of FGD systems were focused on the removal of air pollutants from coalfired boiler, rather than in the iron ore sintering process. In this ...
For the ferrous burden of blast furnaces in China, sinter generally accounts for more than 70% and the sintering process accounts for approximately 610% of the total energy consumption of the iron and steel enterprise. Therefore, saving energy during the sintering process is important to reduce the energy consumption in the iron and steel industry. This paper aims to illustrate recent ...
© DZCrusher - كل الحقوق محفوظة
