The iron and steel making

For making iron-most, are the essential features of coke ovens and the blast furnace, where coke is produced from coal and iron ore is melted (reduced) to produce pig iron, respectively. The furnace is charged from the top with iron ore, coke and limestone; A hot air, frequently enriched with oxygen, blown in from the bottom; and the carbon produced from the coke transforms the iron ore into pig iron containing carbon, with the generation of carbon monoxide and carbon dioxide. The limestone acts as a flux. At a temperature of 1,600 ° C, the pig iron melts and collects at the bottom of the furnace. The furnace is tapped (ie the pig iron is removed) periodically, and pig iron is cast into pigs for later use (eg in foundries), or is poured into ladles where it is transferred, still molten, to the steel making plant. The waste gas from the blast furnace, which is rich in carbon monoxide, burned in blast furnace stoves to heat the air blown into the furnace and may be used as a fuel elsewhere in the steel plant.

Some pig iron is also produced in foundry cupola furnaces. Various processes exist or are under development for producing iron through the direct reduction of iron ore, using reducing gases. Such processes may be more important in the future.
The purpose of operations aa steel refine the pig iron which contains large amounts of carbon and other impurities. The need to reduce carbon content, the impurities oxidized and removed, and the iron converted into a highly elastic metal that can be forged and fabricated. Alloying agents may be added at this stage. Different types of melting furnace used in this process.

Some steel is produced directly from scrap or other materials containing iron, most often in electric arc furnaces, without the need for iron ore or coke.

Steel is cast into slabs, billets, bars, ingots and other shapes. A scarfing, pickling, annealing, hot and cold rolling, extrusion, galvanizing, surface coating, cutting and slitting, and other operations designed to produce a variety of steel products including subsequent steps.


Our Iron Foundry Manufacturing

iron foundry manufacturing is very common in foundry industry manufacturing. We often see scenes like molten iron pouring. There is also sand mold we use for the iron foundry. There are many kinds of sand we can use in iron foundry process such as green sand, resin sand or other sand. Different sand we use will have different advantages in iron foundry manufacturing.

iron foundry (1)In iron foundry process, there will be different size and shape mold. The mold has a hollow cavity we will use it for pouring the iron liquid into it. Also we use the hollow cavity to solidify the iron liquid in iron foundry process. Our iron foundry finished products has a high quality and excellent performing properties in many industries.

Iron foundry method can make many kinds of difficult and non standard finished casting products. We manufacture many kinds of complicated shape and different size iron foundry finished products. By using the commonly adopted iron foundry method, we can manufacture different kinds of stable casting products. Our iron foundry is also durable and wearable to use. During our iron foundry manufacturing process, we control and calculate many kinds of situations. We control the process of mold filling very well to make high quality iron foundry.


Factors Influencing of Quality of Iron Foundry

iron foundry usually made by using metal casting, due to the influence of various factors, there are holes, pinholes, slag, cracks and other defects.

The quality of iron foundry mainly includes appearance quality, internal quality and service quality. First, appearance quality refers to the casting surface roughness, surface defect, dimensions, shape, and weight deviation;

Second, when we said the inner quality of iron foundry we get at the chemical compositions, physical properties, mechanical properties, microstructure and hole, crack, inclusion, segregation that exists in the interior of the iron foundry;

At last, the endurance ability in different working conditions, for instance, wear resistance, corrosion resistance, spall resistance, fatigue, shock absorbing properties and remotion ability and weld ability of process performance, we call all these properties as iron foundry’s service quality.

iron foundry (1)Factors influencing the quality of iron foundry as follow:

The design process of iron foundry, reasonable casting process, the quality of material used for iron foundry, And the operation of the process-make reasonable process operation procedures, improve the technical level of workers, make sure the process procedures was implemented correctly.

Finally, control and inspect quality of iron foundrys during the entire process.
General appearance quality of the specialty of iron foundry can be acquired by below methods: comparison specimens to determine the casting surface roughness; surface crack coloring method, magnetic particle inspection method and so on.