Table of Contents
What is the use of dolochar?
Industrial Dolochar is an unburnt coal which can be used in Power Plant Boilers as fuel in WHBC and CFBC. It comes out from furnace in Sponge Iron plant. It also can be used in Bricks Industries kilns for heating purpose.
What is dolchar?
Dolochar is an industrial solid waste produced as a by-product of direct reduction of iron (DRI) process for the production of sponge iron. For the production of 100 t sponge iron, there are 154 t (65wt% Fe) iron ore and 120 t (B grade) coal required.
Which country is the largest producer of sponge iron?
India
(iii) Sponge Iron: India, world’s largest producer of sponge iron (2018), has a host of coal based units located in the mineral-rich states of the country. Over the years, the coal based route has emerged as a key contributor and accounted for 79% of total sponge iron production in the country.
How is sponge iron is made?
Overview. Sponge iron is formed through the reduction of iron ore to metallic iron through reaction with carbon in the form of coal, etc. Sponge iron is also referred to as direct reduced iron, metalized iron, or hot briquetted iron.
How is HBI produced?
HBI is the product of reducing iron ore with natural gas. HBI stands for hot briquetted iron – porous sponge iron, pressed into briquettes. HBI is created by reducing the iron ore with natural gas. In blast furnaces, HBI replaces coke and iron ore, while in electric arc furnaces it replaces scrap metal.
Why do they call it pig iron?
The term “pig iron” dates back to the time when hot metal was cast into ingots before being charged to the steel plant. The moulds were laid out in sand beds such that they could be fed from a common runner. The group of moulds resembled a litter of sucking pigs, the ingots being called “pigs” and the runner the “sow.”
How is dolochar used in the iron industry?
Dolochar, a solid waste generated from sponge iron industry during the process of direct reduction of iron by rotary kiln, is explored as an adsorbent for phosphate removal in this study.
How is dolochar used in road construction in India?
Keeping in mind the need for bulk use of these solid wastes in India, the possible use of these materials should be developed for construction of low-volume roads in different parts of our country [3]. Dolochar is an industrial solid waste produced as a by-product of direct reduction of iron (DRI) process for the production of sponge iron.
How is dolochar used to treat solid waste?
Using dolochar for treatment of wastewater can help in efficiently utilizing the solid waste and prevent it to go to the dumping sites (Dwari, Rao, Swar, Reddy, & Mishra, 2012; Rout, Bhunia, & Dash, 2015). Granules of dolochar were shredded and sieved through 300 micron mesh.
How much dolochar is produced in day in Odisha?
It has been estimated that there are 146 rotary kilns operating in Odisha, India. The total capacity of sponge iron production in these kilns is 16000 tonnes per day (TPD) and the corresponding dolochar generated is around 3.8 million tonnes per annum (TPA) [7].