|Seed weight:||4 g|
|Grain size:||1 cm|
Iron gems are the most important raw materials for the production of pellets. Pellets; ie pellets made of iron ore and other additives that are first raw and then cooked and hardened and used to restore the traditional method of producing iron in a furnace or a variety of direct recovery methods. The pellets are the raw material for the production of raw iron and should have a favorable chemical and thermal properties in the furnaces of rebuilding. For the production of crude pellets, iron ore fines contain additives, 90% of which are below 325 mesh (45 microns), with rotating solutions such as water to spherical shape, to be rotated in pelletizing machines to produce raw pellets. During the production of raw pellets, additives and sticky substances such as calcium hydroxide may be added to increase the quality and metallurgical properties of the pellets. At this stage, the pellet is produced with the desired dimensions and mechanical strength and is shipped for transportation to a hardening or baking machine. In the second step, the raw pellets are heated to a device in order to harden in the oxidizing atmosphere, so that they are first dried and then baked, so that their degree of porosity does not decrease. At this stage, the bond between the particles of iron ore and other material of the pellet, the crystalline structure of the rock changes, and reactions between the slag and iron oxides are also carried out. At this first stage, materials are exchanged together and neutral compounds or games are formed between the grains of iron oxides. At the end of the baking step, cooling the hot pellets should be done in such a way that no cracks are made. The pellets have the following characteristics: uniform distribution of dimensions ranging from 9 to 16 mm, uniform porosity of 25 to 30%, homogeneous homogeneous composition in the form of hematite or reconstituted hematite compounds, high mechanical strength, uniformity, wear resistance, adequate mechanical strength In the case of heat stress in reducing environment and low adhesion. In order to convert iron concentrate to the pellet, various steps should be taken, such as transferring raw materials, milling and crushing raw materials, mixing raw materials, producing raw pellets, pellets, dripping, cooling water supply, final product transfer, water purification systems, production of compressed air and Laboratory to be done.
The pelletizing plant of Opal Parsian Sangan has a capacity of 5 million tons of pellets per year.