from publication: Enhancement of Coking Properties of Coal by Differential Screening | Coke plays major role in blast furnace operation. Quality of coke mainly depends upon coal used in...
from publication: Enhancement of Coking Properties of Coal by Differential Screening | Coke plays major role in blast furnace operation. Quality of coke mainly depends upon coal used in blend.
Coking coal is an essential input for production of iron and steel. The largest single use of coal in the steel industry is as a fuel for the blast furnace and for the production of metallurgical coke for reduction of iron ore or for injection with the hot blast.
The technical administration of the MChM USSR should be requested to examine use of the method based on determination of the gas-permeability coefficient for evaluation of coke, in order that more accurate procedures for determination of coke properties can be incorporated into State Standards.
The original mathematical model of coke degradation in a blast furnace makes it possible to calculate the minimum consumption of coke from the dynamic balance for different values of the ratio of direct and indirect reduction. As part of the graphic output, it determines the practically and theoretically achievable minimum coke consumption …
The carburization of molten iron is close to saturation in the blast furnace process, while that in the flash ironmaking process is uncertain because there is no pressure from solid charge and no carburization reactions occurring between the deadman and hot metal. Some experiments were conducted to reveal the kinetic mechanism of coke dissolving in …
The blast furnace uses coke, iron ore and limestone to produce pig iron. Coal traditionally has been a key part of the coke-making process. The coal is crushed and ground into a powder and then charged into an oven …
The size of the chemical coke charged into electric reduction furnaces must be smal- ler than that of blast furnace coke. To obtain this small size the larger coke from coke ovens must be crushed, usually to a top size of about 314-inch. Very small sizes must be screened from the crushed coke, leaving an acceptable size of about 3/4" ~1/8".
Coke hardness has an extremely marked effect upon blast-furnace health. The furnace is more immediately sensitive to hardness, which resists wear and tear within the furnace, as shown by the tumbler …
In this study, the sieving PSD and images of the metallurgical coke sampled from the main conveyor belt of a blast furnace were acquired. An efficient coke particle detection model was developed based on the object detection algorithm YOLOv3 [ 31 ].
An investigation was undertaken to determine the changes in the coke mechanical property indices along the movement path from wharf to blast furnace. Coke specimens were collected at three points along the transport path: from the conveyors under the wharfs (one drop of 500 mm); from conveyors located after the screening out of belowmore »
The non-BF (non Blast Furnace) processes, which are not classified as direct reduction, are smelting processes that use coal as the reduction agent. At the final reduction stage, molten iron is produced from solid iron ores.
The main technology currently used for preparing coke for blast-furnace smelting includes increasing the size of the fines screened out of the coke to 36–40 mm, separating nut …
blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. …
oven and is quenched with water prior to screening and shipment to the blast furnace. A blast furnace is used to transform iron ore, limestone and coke into molten iron. In today's high-productivity blast furnaces, coke quality has become the dominant factor to maintain a consistent blast furnace operation and produce a high …
Basic Oxygen Furnace Gas (BOF Gas) exits the furnace at around 1600 • C and 100 Nm 3 /tls is produced, containing carbon dioxide and carbon monoxide. This BOF Gas has a heating value of around 8 ...
A review on quality requirements of metallurgical coke for the blast furnace, coke structure, and relationships between structure and quality. Models of prediction of …
Energy Production. Gulhan Ozbayoglu, in Comprehensive Energy Systems, 2018. 3.19.1.1.2 Coal is used in iron and steel industry. Coking coal is an essential input for production of iron and steel. The largest single use of coal in the steel industry is as a fuel for the blast furnace and for the production of metallurgical coke for reduction of iron …
Conventional coke and charcoal blast furnace require specific types of refractories to ensure smooth operation. We provide a comprehensive range of products for conventional coke blast furnaces, many of which have been customized according to customers' requirements and operating conditions. Since 1982, we have pioneered novel ceramic …
control the rate of coke falling onto a conveyor belt, which carries the coke to a crushing and screening system. The coke is then crushed and screened to the proper size for …
The coke reactivity index and coke strength after reaction are critical parameters for the efficient operation of a blast furnace. Therefore, maintaining desired qualities of the produced coke as per coal blend chemistry and coke oven battery parameters is essential.
Iron oxides, coke and fluxes react with the blast air to form molten reduced iron, carbon monoxide (CO), and slag. The molten iron and slag collect in the hearth at the base of the furnace. The byproduct gas is collected through offtakes ... content, this blast furnace gas has a low heating value, about 2790 to 3350 joules per liter (J/L) (75 to
A method for evaluating the sampled coke in blast furnace includes sampling the coke in blast furnace, sieving, preparing sample, antiwear drum, crushing and extruding, observing erosion and evaluating the special index. The method comprises the following specific steps: 1. and (4) sampling coke. Coke was sampled from 3 tuyeres spaced equally ...
Changes in coke hardness affect the working of the blast furnace, for soft coke is an obstacle to proper furnace operation. Soft coke is due to a low hydrogen-oxygen ratio in the coal charged; increasing this ratio increases the hardness of the coke. …
This article describes the use of coke of the Premium class on blast furnace No. 5 at the Enakievo Metallurgical Plant. It is shown that the use of this coke has increased furnace productivity by 5.7–6.9% and reduced the ... more efficient screening of metallurgical coke and a corresponding decrease in the amount of fines (0–10 mm) in the ...
Coke is used as fuel in a blast furnace. It plays an important role in the chemical processes that take place in a blast furnace. Coal is heated to about 1250 degrees Celsius in the coke ovens. This process …
Coke hardness has an extremely marked effect upon blast-furnace health. The furnace is more immediately sensitive to hardness, which resists wear and tear within the furnace, as …
ler than that of blast furnace coke. To obtain this small size the larger coke from coke ovens must be crushed, usually to a top size of about 314-inch. Very small sizes must be …