The target basicity of iron ore sinter is set by blast furnace slag composition requirements, and therefore varies with the proportion of acid burden such as lump iron ore and pellets. Increasing the lump proportion of the burden will increase the target sinter basicity. The mineralogy of sinter produced with a range of basicity between and was analysed using optical point counting ...
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. Discussion is then focused on the effect of the chemical, physical, and ...
Raw materials for iron ore sintering comprise iron ore nes, uxes, and several other types of raw materials. Based upon the dierent characteristics of iron ore nes, a raw material mix optimization model as shown in Fig. 2 is used for blending raw materials in respective (wt.%) for making feed for the sintering process. The raw material mix ...
An iron ore blend was prepared by mixing the iron ore nes with the required proportion of pellet nes. A small pile was prepared by layering the iron ore blend, coke breeze, ux and return nes on a weight basis, according to the propor tions mentioned in Table 1. After proper mixing, these raw materials were transferred to the granulation drum.
Sinter quality begins with the mined iron ore and the proper selection and mixing of the raw materials. Inhomogeneous raw mix can affect permeability and cause an increase in fuel consumption. During the iron ore sintering process in iron and steel manufacturing, an online analyzer can be used to determine the elemental composition of the bulk ...
Ironbearing byproducts are rich in iron and carbon and are often reused in the iron ore sintering process. However, there are fewer studies on the effect of them on sintering flue gas pollutants.
This process allows the direct utilization of fine iron ores and coal instead of sinter and coke. The fluidized bed reactor system is fed with iron ore fines of a particle size smaller than 8 × 10 −3 m (Ahn et al., 2010) and additives such as limestone or dolomite. To heat up the raw iron ores in the last fluidized bed reactor (fluidized bed ...
The sintering process can be defined as a thermal agglomeration process that is applied to a mixture of iron ore fines, recycled ironmaking products, fluxes, slagforming agents, and solid fuel (coke) with the objective of obtaining a product with the suitable characteristics (thermal, mechanical, physical, and chemical) to be fed to the blast furnace.
A Novel Sintering Process for Porous Iron Ore Sintering with Enhanced Productivity Satendra Kumar1 · Arvind Jaiswal1 · M. Siddaraju1 · Rameshwar Sah1 Received: 10 December 2021 / Accepted: 9 February 2022 ... 1 RD and SS Department, JSW Steel Ltd., Vijayanagar Works, Bellary, Karnataka 583275, India
Sinter is the primary feed material for making iron in a blast furnace. During the iron ore sintering process in iron and steel manufacturing, sinter is created by mixing iron ore concentrate with several additives such as limestone and silica to control the chemistry and then igniting it at 1200°C in a continuous beltfed furnace. The production of highquality sinter is crucial for assuring ...
The liquid phase fluidity of iron ore is a vital index of fundamental sintering characteristics. In this paper, FactSage software and a visible microsintering test device were used to research the ...
A systematic analysis of industrial iron ore sinter product and associated sinter returns was undertaken. The samples were characterised through identification of the major macro and microstructural types present in these materials. Examination of the breakage surfaces of the particles indicates a strong correlation between mechanical sinter strength and sinter microstructure. Preferential ...
The present work proposes a novel process to sinter porous iron ore (porosity ~2324%) with enhanced productivity and quality. The iron ore is preprocessed in the presence of calcined lime for the temporary closure of pores, which further prevents water absorption during the granulation process in drum in the presence of water. The calcined lime coated iron ore provides surface coating on ...
A Review of Calcium Ferrite in Sintering of Iron Ore and The Effect of Gangue Composition on Its Formation February 2023 Academic Journal of Science and Technology 5(1):2531
The iron ore sintering process is one of the most energyintensive and pollutantemitting processes in . the steel process, with significantly higher SO 2, NO x, CO, CO 2 and dioxin emissions and ...
The iron and steel industry has made an important contribution to China's economic development, and sinter accounts for 7080% of the blast furnace feed charge. However, the average grade of domestic iron ore is low, and imported iron ore is easily affected by transportation and price. The intelligent ore blending model with an intelligent algorithm as the core is studied.
Granulation and sintering are the two most important steps of the iron ore agglomeration process to produce sintered ore. Since granulation takes place at room temperature and is mainly characterized by physical and interfacial phenomena, while sintering is a thermal densification process involving extensive chemical reactions, the characteristics of the ore blends during these processes are ...
In the iron ore sintering process, the resistance to air flow is a major factor in deciding the flame front speed, which influences the sinter productivity and quality.
The coke breeze consumption in the JSW Steel Limited sinter plant was high compared to many other sinter plants in the world, and as there was a local shortage, optimisation in the sinter plants was necessary. FeO is an indicator of the thermal state of the sintering process and is employed as a quality control tool at many plants.
Lump iron ore, fluxed/superfluxed sinter and acid/basic pellets are the major iron bearing materials. Because of high SiO 2 and Al 2 O 3 content in iron bearing materials, limestone and dolomite as fluxes are added in sintering process to promote the formation of low melting slag which helps in achieving the desired sinter properties.
Abstract. Iron ore granulation is an indispensable process in the production of sinter that can influence and regulate the yield, efficiency and quality. Although a great deal of research has been done on the granulation process over the past decades, we still need to think about the current and future development of this process, as sinter is ...
Intensification of the iron ore sintering process was approached by injecting hydrogenrich gas into the sinter bed. The location of the injection was critical to the pyrolysis of the solid fuel, and the SOx and NOx emissions. After installing the injection system in the most appropriate zone, the process intensified, and the emissions were ...
The mill scale contains high amounts of Fe and low amounts of silica and alumina. Thus, recycling it through the sintering process helps in the saving of raw materials like iron ore and limestone. This paper presents preliminary findings of a study that investigates the potential for recycling steel mill scale in the sintering process.
Biomass is a renewable and sustainable energy source, and it has now become an increasingly important alternative energy source in the iron ore sintering process [3, 4]. As compared with the usage of conventional solid fuel (coke breeze and anthracite coal) in the sintering process, biomass is carbon neutral and it has lower CO 2, NOx, and SO ...
ore. Iron ore sinter accounts 60% to 80% of the iron ore raw materials of blast furnace in China and has a great impact on the cost of molten ) Under the premise of ensuring the quality of iron ore sinter, improving the sintering productivity is an important way to achieve low energy consumption and high efficiency in sintering.
Sintering facilitates feed of iron ore fines in blast furnace, blended with fluxes and coking coal / coke. The depletion of iron ore quality poses new challenges to steel makers. There is a need to find alternate solutions maintaining optimal composition and metallurgical properties of the sinter to enable the production of highquality hot ...
© DZCrusher - كل الحقوق محفوظة
