Iron-smelting and the steel-making process are two major metallurgical processes requiring coal. Both of these processes need high quality coal with low impurities. Anthracite anthracite is one of best types of anthracite, because it has been treated with an electrical calciner. This process removes moisture and volatile matter. This process also increases the density and conductivity. It has good physical qualities, including low sulphur and high carbon. It is ideal for steel-smelting as well as casting and friction material.
Coal is formed from the decay of organic material and animal wastes that has been occurring for millions of ages. Anthracite is one type of coal. Other types include bituminous, lignite, and anthracite. These types of coal have different properties that are useful in certain metallurgical processing. Anthracite, a dense black coal with a high carbon content of over 92% and a high energy density, is very dense. Anthracite is calcined to reduce volatile matter, moisture, and sulphur contents to less than 2 %. It has excellent grain stability, high strength and a low coefficient of thermal expansion.
Petroleum coke is a byproduct of oil refining and is often used for industrial purposes. It has a high carbon content, low sulphur content and a very low hydrogen content. It can also be used in the production of electrodes and polygranular graphite. It is used in the steel-making process and as a metallurgical additive.
To produce petroleum coke, a delayed-coking unit (a type of coal fired kiln) is needed. The residual petroleum is placed in the drum of the coke-making machine, and heated to high temperatures without air. This produces solid coke. The quality of coke is determined by its mineral content, carbon content, and composition. Its ability to melt, turn plastic, and then re-solidify when heated are also factors. Bituminous class coals that meet these criteria are known as coking coals.
Metallurgical coals have higher calorific value than normal coal, which makes them an attractive fuel source for metallurgical applications. A metallurgical-grade coke does not contain impurities including sulfur and dust, which could impact the quality or the steel. Coke, which produces less smoke when it is burned, is also a more safe fuel than coal.
The invention provides a method of synthesizing a calcium carbide smelting raw material by uniformly mixing semi-coke powder, calcined coal powder and lime powder in a ratio of 28-30%:28-30%:28-30%:16-10%; extruding the mixture into balls using a mixture extrusion molding machine; cooling the balls to obtain the calcium carbide smelting raw material. The process lowers production costs, conserves natural resources and is environmentally friendly. This process has low requirements for technical knowledge and is simple to use.
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