iron oxide pellets purchase price+Quality testing
How much do you know about iron oxide and direct reduction iron oxide pellets in factories around the world?
iron oxide pellets price
There are different types of this product on the market, each serving its own purpose.
But you might think that today iron has nothing to do with metals like gold.
Of course, you are right.
But you must know that in ancient times iron was so rare that it was more expensive than gold.
As the science of iron extraction has developed, so has it.
The ore from which iron is obtained is usually in the form of oxides called iron oxides.
This material is converted into pure iron through a furnace.
If you have a question, what is iron oxide and what atoms is it made of? We must say that this material is made of iron and oxygen combined.
But wait! It's not that simple.
What matters is how these two atoms combine; for by changing how they combine, the color of the iron oxide and its properties also change.
In other words, the molecular formula of the substance varies according to the color of the substance.
Now you want to know what color iron oxide is?
This substance is a mixture of iron and oxygen, of which there are 16 today.
This material is divided into two types, mineral and synthetic, and its mineral types include hematite, magnetite, and ferrite.
These rocks are used to extract iron.
Synthetic iron oxide is an iron pigment with many uses due to its color stability and high purity.
After mining, the iron oxide is converted into oxygen and pure iron by adding carbon in a hot furnace.
Important uses of iron oxide:
- color production
- Make a corrosion-resistant coating
- Production of printing inks
- tile manufacturing
- Remove pollutants from the water
- medical science
- coal washing
- make cosmetics
- separation of dense minerals
- steel production
- Cast and prevent parts from streaking, carbon reduction, Macsuzi and cause defects
- Rubber manufacturing
- tape
- Concrete and cement production
- Corrosion inhibitor
Production method for iron oxide
Since the mineral iron oxide cannot meet the industrial needs due to the limitation of mines, synthetic methods and laboratory methods are promoted to produce this product.
There are different types of iron oxide production methods.
Controlling size, morphology, porosity, etc.
in these methods is associated with challenges.
These structural properties affect electrical, mechanical, optical and magnetic properties, and by changing the parameters and thus the properties, different iron oxides can be produced for different applications.
* Rain
In the precipitation method, ferrous sulfate is dissolved in water with a pH of less than 3.
The pH was then raised to 7 by adding sodium hydroxide to it and aerating it.
Over time, the color of iron hydroxide turns yellow.
After filtering this product, called limonite, the ferric hydroxide is heated to dryness.
As the temperature gradually increases, the color of the product changes to orange, red, brown and then black.
* chemical deposition
The method is used for the synthesis of iron oxide nanoparticles using ferric chloride, hydrochloric acid, ammonia water and other raw materials.
iron oxide pellets supplier
In this method, iron nanoparticles are chemically introduced into the silica medium.
The sol-gel method reduces the particle size and gives better performance.
Because of this, this method is used more often.
* Thermal degradation
In this method, when a substance reaches a certain temperature, its structure changes and oxides are produced.
In this method, oxides are prepared by reducing aromatic products with antimony or iron.
What color is iron oxide?
The material is available in green, blue, ochre, yellow and black.
These materials are inexpensive pigments that have many uses in the production of paints, coatings and more.
Even in the food industry these materials are used and they are called food colors.
The color of iron oxide depends on the arrangement of the iron and oxygen atoms together, and the color of this substance changes when the arrangement of these atoms changes.
* Green (west)
Green iron oxide with the chemical formula FeO is one of the rarer types of this product, also known as iron oxide ii.
In other words, the oxidation number of iron is two.
This green oxide should be stored in a dry, cool environment away from moisture; it absorbs moisture.
This oxide is widely used in the rubber industry, cosmetics, and paints.
* Ochre (hematite)
This type of oxide exists as a red or dark brown powder.
The oxidation number of iron in this compound is three, and the chemical formula is Fe2O3.
Iron oxide iii refers to this compound, which is also widely used in the manufacture of magnetic tapes.
This material is also used to purify metals from ores.
Heavy metal contamination can also be removed with this product.
* Yellow (limonite)
The color of this oxide is pale yellow-green, and it is also called limonite.
The main use of this product is in the production of cosmetics.
* black (magnetite)
The chemical formula of this substance is Fe3O4 and the color is black.
This material is also known as iron oxide ii iii or black iron oxide.
Four methods of steel and direct iron reduction DRI in factories around the world:
- Oxygen removal from O-steel
- Sulfur removal from S-steel
- Bring the melt temperature to the temperature when the melt comes out of the furnace
- Determination of steel elements and alloys
- Sulfur and oxygen can cause steel to break when parts are used.
- Elements that absorb oxygen from steel are: Si, Mn, Cr
Oxides that produce slag:
These formulas are called reducing interactions [FeO]+[Si]→SiO2.
[FeO]+C→[Fe]+CO
CaO calcium oxide, silicon oxide SiO2, manganese oxide, MnO magnesium oxide, MgO iron oxide FeO, phosphorus oxide P2O5, aluminum oxide Al2O3
What is white slag? How is it prepared?
The following materials must be prepared for each ton of steel:
- CaO 3 to 5 kg, CaF2 1 to 3 kg, FeSi 5 to 8 kg, C coke 1 to 1.
- 5 kg
- The explanation is that all these materials must be in powder form.
- We mix all this together and add it to the stove little by little.
- Formula for white slag: 2CaO.
- SiO2
- For melts of 0.
- 20-0.
- 10 SiO2, FeO, ≤0.
- 07 FeO; MnO≤0.
- 04, MnO≤0.
- 05-MgO 0.
- 01;
- Carbon and silicon were chosen as reducing agents.
- After adding coke powder and ferrosilicon to the slag, the slag becomes thinner and more playable (recycle mode does a good job).
- [FeS]+[MnO]→[MnS]+[FeO]
- If the steel has more sulfur than mild steel, we add Co3CaCaFe and heat the steel to reduce the sulfur, or add some Mn to the melt, resulting in manganese sulfur (MnS).
iron oxide pellets for sale
How is carbide slag obtained?
When the ferrosilicon content of the steel is low, the process is called slag carbide.
The following ferroalloys have higher melting points than steel:
- Get more than 2000°C
- Foam 1550-1630 °C
- Surface 1660-1700 degrees Celsius
- gas in steel
- Hydrogen, Nitrogen, Oxygen
hydrogen
Hydrogen enters the melt by filling wet iron alloys and some with air.
If the melting temperature is high, this gas will dissolve earlier, and if the melting temperature is low, it will be released from the melt as the steel is welded.
Nitrogen
This gas enters the furnace through the air.
There is NO next to the electrode and N below the electrode.
It makes steel brittle.
In some types of steel, nitrogen is used for nitrogen melting due to the hardness of the steel.
Typically, these melts are produced in induction furnaces.
But nitrogen is harmful in other melts.
oxygen
This gas is naturally present in steel through ferroalloys through air and is removed from melting by restoring the steel.
Another way to eliminate this gas is to use argon, which is blown by special melting devices, instead of nitrogen.
and other molten gases.
During steel regeneration, powdered lime should not be added to the melt because it contains Ca(OH)2.
Control of steelmaking technology - Regeneration time
Steel must have melt control.
First, it had to be revival.
Second, make sure that the temperature of the steel does not rise.
At the third level, he adjusts the chemical properties of the steel by taking samples and receiving answers from the laboratory, based on the required grade of steel, the percentage of elements provided by the laboratory.
Steel regeneration is known when a steelmaker pours a spoonful of melt into a sampling cup.
If the sample swells, it is not recycled steel.
Steel regenerates well if you smoke in a beaker.
Pour molten steel from the furnace into a crucible for casting
When the melt is ready in every way, i.
e.
set the temperature according to the mark and set the percentage of the elements, we empty it through the melt outlet valve in the pan and pour it into the desired shape.
bottle for pouring melt
We have two types of bottles: overflow bottle and step bottle
1.
Patil spillway
In this pan, we lead the melt through the edge of the pan into the mold.
When casting, if the experts at Isfahan Foundry are not careful, it is possible that the slag enters the mold with the metal from the edge of the pot, and as a result, holes will be formed in the mold.
And the part will be damaged ie.
it will be cream colored or have a mace.
2.
Patil with steppes
The advantage of this type of crucible is that both the melt control and the crucible are in the hands of the caster during the pouring of the melt.
It can decrease or increase the melting pressure by treading.
These types of pots should be made with clinker because the clinker transfers less heat than it does on its own.
The crucible must be heated to 600 degrees before melting.
Heated by gas burners.
electrode consumption
The normal consumption of one ton of electric melting furnace electrodes is 15 kg.
Elements that do not oxidize during heating or slag extraction from steel.
Mo, Ni, and Cu can also be added to the furnace since it has no fuel.
They only evaporate when they are charged under the electrodes.
steel construction
1- Ferrite: Ferrite refers to relatively pure iron with some carbon dissolved in it.
2-Pearlite: If we gradually add the amount of carbon in iron, in addition to the ferrite phase, a black-white thread-like structure can be observed as a fingerprint in iron, which exists in the form of discontinuities and discontinuities.
The iron has staggered lines on its cross-section, which are called pearlite.
iron oxide pellets properties
The higher the carbon content of iron, the higher the pearlite content, which becomes stronger but more brittle.
Description of steelmaking technology, markings in the form of alternating lines on the cross-section of iron, called pearlite.
The higher the carbon content of iron, the higher the pearlite content, which becomes stronger but more brittle.
Technical description of steel production with brand 38 X3 MPA
In an electric arc furnace, the melt flow consists of the following steps:
- Clean the oven
- Loading
- melt
- Oxidation
- recovery
- melt discharge
- casting
1- Oven cleaning (maintenance)
The reason why these points are mentioned in this description is that the repair of the furnace after each melting is of special importance to the furnace and its durability and life for masonry; due to the oven not being properly cleaned and repaired, the magnesium powder is not cleaned underneath.
the melting process is removed in the melting process and requires unnecessary repairs, which causes many problems in the melting process.
To do this, after the metal has been emptied from the furnace, visit the furnace with a metal bar If there is slag or metal in the bottom or slag line, or in the grooves and cavities around the furnace, to clean the metal and slag, Then clean up with powder.
Mix 85% magnesite and 15% liquid glass well, pour it on the bottom of the furnace, slag lines and depressions to repair, then our furnace can be melted.
2- Load
Charges must be filled in special containers called baskets in the following order:
- 10%~15% or less load, including parts with size 100x150x200mm
- 25% Large Scrap Alloy Material 250 x 350 x 600 mm
- 25% to 35% medium scrap size 150x250x400 mm
- 15% ~ 25% of small charge material of 100x150x200mm size
3- Materials and materials necessary for charging
Cast iron ingot, carbon steel brand workshop return steel includes: (external melting, channel steel, feed, return), standard scrap includes: (iron beam rolled ingot head and bottom).
It must be remembered that a return flight exceeding one third of the total weight of the cargo is not permitted.
To give some of the necessary carbon to this mark, a small electrode or coarse coke may be used.
In order to oxidize carbon, in addition to the minimum requirements, a 0.
3C charge should be considered.
The answer for the first molten carbon sample should be C = 0.
63.
Additionally, the orientation of the carbon fuel as it melts and turns solids into liquids should be considered at 0.
30% to 0.
25%.
Therefore, the calculated carbon content should not be less than 0.
83 per read.
For immediate slag formation and to prevent carbon fuel from absorbing less molten gas and to prevent excessive oxidation of carbon by melting at the bottom of the furnace before charging, add limestone CaCO3 1% of the total weight and then add it to the basket, we pours it with a faucet into the stove.
Care must be taken not to pour the charge in front of the working valve, so that the furnace can better control the melting process of the charge in the furnace.
Before starting melting and opening the furnace, the steelworks should check the condition of the hydraulic system and the furnace, as well as water coolers and economizers around the furnace.
Once confirmed, start melting.
When starting to melt, it must be done in the first stage of the furnace's 6 stages with the maximum power of the transformer.
After opening the oven for 1 hour, use a special tool to pass the charge around the oven to the electrode.
tool.
80% of the charge is melted per ton of charge, and 25 to 30 kg of lime ore must be added to the furnace after the charge and lime have completely melted, which usually takes 10 minutes.
We take the first sample from the center of the furnace and send it to the laboratory to determine the percentages of the following elements.
How useful is this article to you?
Average Score
5
/
Number of votes:
1
