What is recovery type coke oven battery?
The coke ovens which are based on this technology are known as by-product coke ovens. In the heat recovery coke technology, the heat is generated by the combustion of volatile matter which is then penetrated into the coal mass through radiation from the oven top and also by conduction.
How does a coke oven battery work?
In the coke oven, the coal is heated to 1,800°F for up to 18 hours. During that time, the volatiles of the coal are driven into the offgas and a pure carbon form called “coke” remains. The coke, when exposed to oxygen, will immediately ignite and begin to burn.
Which coal is used in coke oven?
bituminous coal
Abstract. Coke oven emissions are the volatile products that are released from bituminous coal during its conversion to coke in high temperature ovens in the absence of air.
What is coke oven in steel plant?
Coke is used in Blast Furnace (BF) both as a reductant and as a source of thermal energy. It involves reduction of ore to liquid metal in the blast furnace and and refining in convertor to form steel. The various stages of the steel plant is described below.
How does a beehive oven work?
A beehive oven is a dome-shaped brick structure that looks a bit like an insect’s nest, hence the name ‘beehive’. The dome shape traps heat in the oven so food cooks evenly. All parts of a beehive oven were made of brick, include the oven’s base, or floor, and its sides.
What is the difference between coal and coke?
Coal and Coke are both a type of fossil fuels. The difference between these two fuels is that coal is mostly carbon but coke contains mostly water and less than half the carbon content of coal.
How did old coke ovens work?
A worker known as a “scraper” leveled off the coal by reaching in through the door in the front of the oven. He did that so the coke would burn evenly. “The coal was loaded, or “charged”, into an oven that was between two hot ovens, so that the newly-charged oven could light itself by spontaneous combustion.
Does coke burn hotter than coal?
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.
Why is coke used instead of coal?
The single most important factor is strength ( mechanical compressive ); coal is heated to make coke, the resulting coke is stronger than the original coal. Also, coke helps to make the charge of iron oxides and limestone more porous to permit gas flow up and droplets of liquid iron and slag down.
What are the main products of coke oven plant?
The main by-product in the process of coke making is crude coke oven gas and this has a lot of valuable chemicals. Coal Chemical Plant recovers Ammonia (NH3), Tar and Benzol from CO-Gas. The primary by-products from Crude CO Gas are Ammonium Sulphate (NH4)2SO4, Crude Tar, Crude Benzol and cleaned coke oven gas.
How did a beehive coke oven work?
Heat is supplied by the burning volatile matter so no by-products are recovered. The exhaust gases are allowed to escape to the atmosphere. The hot coke is quenched with water and discharged, manually through the side door. The walls and roof retain enough heat to initiate carbonization of the next charge.