Low FeO content has long been used as an index of good reducibility, since FeO reacts with silica to form the difficult to reduce phase fayalite. Silica alumina ratio in the sinter is to be less than 0.5. The lower it is better. The ratio between CaO and SiO2 determines the sinter basicity.
What are the two grades of iron ore?
However, for classification and evaluation of quality, the raw iron ores can be divided into three basic classes depending on the total Fe content: (i) high-grade iron ores with a total Fe content above 65%, (ii) medium- or average-grade ores with varied Fe contents in the range between 62–64%, and (iii) low-grade ores …
What is 98% of iron ore turned into?
The primary use of iron ore (98%) is to make steel. The remaining 2% is used in various other applications, such as: powdered iron—for certain types of steels, magnets, auto parts and catalysts.
Which iron ore has highest iron content?
Magnetite
Magnetite is the finest ore among all the ores of Iron. Magnetite ore comprises of seventy per cent of iron. The magnetic properties in this ore are appreciable.
What happens during sintering?
What is Sintering? Sintering is the process of fusing particles together into one solid mass by using a combination of pressure and heat without melting the materials. Common particles that are sintered together include metal, ceramic, plastic, and other various materials.
What is sinter in steel plant?
The sinter plant turns iron ore into sinter, which is the optimal product for the blast furnace. Sinter is made by burning a mix of iron ore powder, fluxes and recycled substances from the steel plant to create an open-grained, consistent substance. The sinter is then crushed, cooled and screened for dust.
What are the 4 types of iron ore?
Iron ores are rocks and minerals from which metallic iron can be extracted. There are four main types of iron ore deposit: massive hematite, which is the most commonly mined, magnetite, titanomagnetite, and pisolitic ironstone. These ores vary in colour from dark grey, bright yellow, or deep purple to rusty red.
Which state is the highest producer of iron ore?
Orissa
Orissa is the largest producer of Iron ore in India. Orissa accounts for over half of India’s iron ore production, produced 120 million tonnes during the 2019/2020 year.
How is the tumbler index of iron ore determined?
(ii) Abrasion Index: It is a relative measure the degradation of iron ore by abrasion. The Tumbler Index and Aibrasion Index are determined in a tumbler test apparatus as per the Bureau of Indian Standard No. IS:6495 .
What is the method of Tumbler test for iron oxides?
IS 6495 (1984): Method of Tumbler Test for Iron Oxides: Lump Ores, Sinter and Pellets Disclosure to Promote the Right To Information
How are tumbler index and abrasion index related?
A removable stainless steel tray is provided to collect the material from the drum. Ref. The Tumbler Index is a relative measure of the resistance of the material to breakage or degradation by impact. (ii) Abrasion Index: It is a relative measure the degradation of iron ore by abrasion.
Which is the best description of the tumbler index?
The Tumbler Index is a relative measure of the resistance of the material to breakage or degradation by impact.
