Nut Coke means coke otherwise meeting the quality specifications in Schedule A and of a size equal to or greater than 3/8 inch and less than 3/4 inch.
What is nut coke used for?
In the blast furnace route of ironmaking, metallurgical coke are used for four main purposes: first to act as a reducing agent, second to fulfil the energy demand of the endothermic reduction reactions, third to maintain the structure and permeability inside the furnace and fourth to act as a carburiser for freshly
Why nut coke is use in blast furnace?
Nut coke (size < 40 mm) is charged in mixture with the ferrous burden in the blast furnace to take advantage of better permeability, enhanced reduction kinetics and to lower the expensive regular coke requirement during smelting. Nut coke is charged in wide range of size 10 – 40 mm and concentration from 2 – 35 %.
What is coke breeze?
Definition of coke breeze
: a fine coke separated by screening from the larger sizes before or after crushing.
What is metallurgical coke?
Metallurgical coke is produced by destructive distillation of coal in coke ovens. Prepared coal is “coked”, or heated in an oxygen-free atmosphere until all volatile components in the coal evaporate. The material remaining is called coke.
Why limestone is used in blast furnace?
Limestone is also used to remove impurities from the blast furnace when making iron. The impurities are mostly silicon dioxide (also known as sand). The calcium carbonate in the limestone reacts with the silicon dioxide to form calcium silicate (also known as slag).
How the quality of coke does effects the reaction of a blast furnace?
A high quality BF coke is able to support a smooth descent of the blast furnace burden with as little degradation as possible while providing the lowest amount of impurities, highest thermal energy, highest metal reduction, and optimum permeability for the flow of gaseous and molten products.
What is the difference between coal and coke?
Coal is a lustrous, black fossil fuel that includes impurities, generates smoke, and generates less heat than coke when burned. Coke is a dingy, black coal waste that burns hotter and cleaner.
What is coke Energy coal?
Coke (coal): A solid carbonaceous residue derived from low-ash, low-sulfur bituminous coal from which the volatile constituents are driven off by baking in an oven at temperatures as high as 2,000 degrees Fahrenheit so that the fixed carbon and residual ash are fused together.
Where is coke fuel from?
Coke is a fuel with few impurities and a high carbon content, usually made from coal. It is the solid carbonaceous material derived from destructive distillation of low-ash, low-sulfur bituminous coal. Cokes made from coal are grey, hard, and porous.
What is Otto Hoffman Process?
Manufacture Of METALLURGICAL COKE By Otto-Hoffmann’s By Product Oven Process:- The process of preparing coke from coal is known as carbonization of coal. When bituminous coal is heated strongly in the absence of air, the dense strong, porous mass obtained is called metallurgical coke.
What is the difference between petcoke and met coke?
Petcoke has a significantly high heating value compared to metallurgical coke (metcoke) and bituminous coals (see Table 2). The higher heating value comes at the cost of higher sulfur and nitrogen content, however. Ash content is relatively low, compared to coal, but much of it is in the form of heavy metals.
What is the difference between Met coal and thermal coal?
Met coal typically contains more carbon, less ash and less moisture than thermal coal, which is used for electricity generation. Coal is formed from prehistoric vegetation that has been heated and compressed over millions of years.
What is in pig iron?
Pig iron is the product of smelting iron ore (also ilmenite) with a high-carbon fuel and reductant such as coke, usually with limestone as a flux. Charcoal and anthracite are also used as fuel and reductant. Pig iron is produced by smelting or iron ore in blast furnaces or by smelting ilmenite in electric furnaces.
Is limestone used in toothpaste?
Calcium carbonate is good for strong, healthy teeth. Many toothpaste manufacturers use limestone in their toothpaste. Most toothpaste includes abrasives, binders, foaming agents, detergents, including limestone. The limestone content in toothpaste functions as a moderate abrasive, filler, and as a thickening agent.
Is dolomite a mineral?
Dolomite is a common rock-forming mineral. It is a calcium magnesium carbonate with a chemical composition of CaMg(CO3)2. It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble.
Why is steel needed for coke?
Coke is used as a fuel and a reducing agent in melting iron ore. It is produced by baking coal until it becomes carbon by burning off impurities without burning up the coal itself. When coke is consumed it generates intense heat but little smoke, making it ideal for smelting iron and steel.
Why is coke needed to make zinc?
Zinc can promote production and incorporation of coke pores in the gasification reaction process. Zinc attributes to accelerating the decomposition of the ketone group in coke.
Why is coke so important?
Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.
Who invented coke from coal?
A study of the records of the Coalbrookdale Company enabled Professor Ashton to show that the invention must be credited to Abraham Darby I, who died in 1717, and that all the evidence pointed to the year 1709 as the date of its first use. This opinion has since been confirmed by Dr. Raistrick. 3 More recently, Dr.
What is the difference between coke and anthracite?
Anthracite is not porous like coke and is difficult to burn. It takes much longer to reach a suitable forge temperature, but if it’s all you can find in your area, it will work. Ideally, you’ll want bituminous coal for your forge.
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