Iron ore pellets with particles from 0 to 100 microns are available worldwide as pellet feed for pelleting. The price is always per ton or kg and in the case of additional grinding in a short time, this raw material is considered suitable for feeding direct processing plants equipped with granulation plants like our company.
Green and hardened green pellets are also used in some direct regeneration processes. Raw materials for the production and manufacture of iron ore pellets
Commercial iron ore with a particle size of less than 10 mm (typically 6 mm) is supplied in bulk to blast furnaces and direct reduction plants worldwide.
These materials are added directly to the blast furnace for the direct regeneration process when the sintering machine is first charged and can also be added after the initial charge of pellets has been ground.
In direct regeneration plants equipped with pelleting units, block feed is also suitable for pelleting, especially since this material is easier to transport than pelleted feed and its relative loss during transport is less, in addition, special transport equipment is not required.
natural particles
Ironstones in sizes 6 to 7 mm are also available on the international market. If the stone has a 15mm grit, it is sold as natural grit. The material is cooled before use and can be used in DRI ovens after softening.
The particular surface of these stones, especially the sharp corners of the grains and their lower hardness compared to the cooked grains, makes them softer in the oven.
Natural particles can also be added to the initial charge of agglomerates after crushing and milling.
Iron pellets are the raw material for the production of pig iron. Granules are small particles of hardened or roasted iron ore and other additives.
Compared to blast furnace pellets, pellets from the direct regeneration process have higher iron quality and fewer impurities.
The mass used in the blast furnace must be larger and stronger, also depending on the size of the blast furnace. The degree of regeneration also depends on the degree of porosity, interface and gas-solid contact.
Soft iron ore is used in the beneficiation process, containing 91% 45 micron size additives. To obtain a round shape, the resulting material is mixed with water and centrifuged in a grinder to grind pig iron.
Additives and binders such as calcium hydroxide can be added to improve the quality and metallurgical properties during mash production.
At this stage, grains of the desired size and sufficient hardness are made and sent to the oven and curing.
For hardening in an oxidizing atmosphere, it is gently heated in a machine to the softening point of iron ore, first dried and then fired so that its porosity does not decrease. Finally, after cooking, the raw balls need to cool so that cracks don’t form in them.
The raw materials for iron ore pellets include:
bentonite
limestone
organic material
cement
water
Pellet production by the disc method
It is used industrially in granulating discs with a diameter of 6 to 7.5 meters and a production capacity of 90 to 120 t/h.
In this process, raw materials are processed into granules by placing them on the surface of a special rotating disk. The disk rotates at about 6 to 8 revolutions per minute and is angled at 45 degrees from the horizon.
About 70% of the disk surface is effectively used for pellet production. The speed of rotation of the disk, the angle of deviation from horizontal, and the duration of movement of the disk are among the factors affecting the properties of the particles produced by this process.
In the turntable, the particles have the same size and their mechanical properties can be adjusted.
Iron ore price per ton
Iron ore is one of the most important minerals in the world and is considered a raw material for steel production.
In today’s industry, the price is calculated in tons and kg, and many different metals are used in the manufacture of products. The most important of these metals is undoubtedly steel, obtained by mining iron ore and processing and refining it.
Today’s modern industries and civilizations require steel and cast iron structures made largely from this ore.
Iron (Fe) is a metallic element that makes up about 5% of the earth’s crust and is the fourth most abundant element in the earth’s crust.
The main iron ore reserves are located in sedimentary rocks. Iron ore is a rock from which metallic iron can be mined economically.
How iron ore is mined
The first step in characterizing iron ore is to identify ore-rich mines created by experienced engineers and experts.
After experts identify potential mines, iron ore extraction begins, and it is cleaned and can be mined as pure metal.
Pure iron extracted from ore is dark in color and very sensitive to oxidation and shock. In order for iron to be used in applications such as metal construction and various steel industries, it must be combined with elements such as carbon, nickel and chromium to form an alloy of iron to eliminate its weaknesses and increase its strength.
Australia and Brazil are the world’s largest iron ore producers. China is also the world’s largest importer and consumer of this mineral.
Because minerals of different sizes and sizes are obtained in the extraction stage, the crushing process in the first stage requires the coarse stones to be separated, and this physical separation is known as sieving by size of the stones.
Iron ore must be crushed and pulverized to increase concentration and quality. The work is carried out in several stages by a stone crusher and then ground depending on the type and hardness of the stone. There are different types of stone crushers.
Iron ore from mines is of low quality and needs to be cleaned. After the iron ore has been mined, it is first prepared for processing and passes through several stages into the blast furnace.
These steps include pulverizing, grinding, filtering and washing. Eventually they increased their quality to 65-65% using the flotation process or the use of a magnetic separator.
The resulting stones are then cut into sizes ranging from 6 to 25mm to fit in the kiln. In smelting furnaces, called blast furnaces, concentrated iron ore, known as iron concentrate, is subjected to intense heat along with limestone and coke.
Then the desired metal is melted due to the heat and gas flow from the coke fuel. Molten iron and slag from stone impurities are gradually discharged from the furnace.
In this system, the furnace is constantly being filled with new metal ore and used to produce liquid iron. The product of this furnace is cast iron, which is used in certain industries. But most metal structures and industries that engage in metalworking require a very durable form called steel. Cast iron is therefore reworked and the necessary steel is obtained from it.
