iron ore and pellet are made of iron ore and other additives that are first raw and then cooked and hardened; And it is used to revive the traditional method of iron production in blast furnaces or various direct reduction methods. To make the desired pellets. Its analysis includes metal oxides such as silicon, calcium, aluminum, magnesium, vanadium, titanium, manganese. Phosphorus and sulfur are also harmful in the analysis. if you want to know about iron ore fines, and iron ore pellet grades; read on.
Iron ore and pellet different grades
Pellet is a raw material for the production of crude iron and must have good mechanical, chemical and thermal properties in regenerative furnaces. To produce raw pellets, iron ore softeners contain additives, 90% of which are below 325 mesh (equivalent to 45 microns), with rotating solutions such as water to achieve spherical shape, rotated in pelletizing machines to produce raw pellets.
During the production of raw pellets, additives and adhesives such as calcium hydroxide may be added to increase the quality and mechanical metallurgical properties of pellets. At this stage, the pellets are produced with desirable dimensions and sufficient mechanical strength and are sent to the hardening or cooking machine for transportation. In the second stage, the raw pellets are carefully heated in a device to harden to the softening temperature of the iron ore in order to harden and then dry, so that their porosity does not decrease.
At this stage, by bonding between iron ore particles and other pellet load materials, the crystalline structure of the rock changes and reactions occur between slag-forming materials and iron oxides. In this first step, the materials are exchanged and neutral compounds or games are formed between the grains of iron oxides. At the end of the cooking process, the hot pellets should be cooled so that they do not crack.
Processing methods for iron ore and pellet
Pellets have the following characteristics: uniform distribution of dimensions mainly from 9 to 16 mm, high and uniform porosity of 25 to 30%, uniform mineral composition in the form of regenerative hematite or hematite compounds, sufficient mechanical strength and even mechanical strength, abrasion resistance, Against thermal stress in reducing environments and low adhesion. To convert iron concentrate to pellets, various steps such as raw material transfer, grinding and crushing of raw materials, mixing of raw materials, production of raw pellets, pellet kiln, dusting, cooling water supply, final product transfer, water purification system, compressed air production and Lab to be done.Iron ore molds are mixed with 325 mesh or dimensions (45 microns) along with water and additives such as: calcium hydroxide or lime milk, lime, bentonite, and various organic and mineral adhesives (starch, cement…) and rotated by a pelletizing machine.
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