Testing of granulated coke produced by sintering
Introduction
Coke coal is a solid and stable combustible material that is mainly used in metallurgical industry to reduce iron ore into pig iron. It is made by coal coking, which is the process of heating coal in the absence of air to form coke with a series of chemical reactions. Coke has been used in the production process of sintering and has become an important factor for steel production. The quality of coke is mainly determined by parameters such as coke strength, resistivity and real density. However, there are still many requirements in the monitoring of coke properties produced by sintering technology.
In order to obtain good quality of coke, physical and chemical properties of the final product must be carefully tested and inspected. The goal of these tests is to guarantee that the finished product is of high quality and suitable for the production of steel. The most accurate and efficient way to measure these parameters is to use an advanced testing facility and equipment. Today, the most common testing methods of coke produced by sintering are calorimeter testing, fixed resistivity testing and chemical testing.
Calorimeter Testing
Calorimeter testing is a method used to measure the calorific value of the content of granulated cokes produced by sintering. It works by measuring the heat produced by combusting a sample of the cokes against an inert gas stream. The heat produced is directly proportional to the calorific value of the cokes. The calorific value is an important indicator in the evaluation of the quality of granulated cokes. It tells the user how much energy the cokes can produce when burned. Higher calorific values indicate higher quality cokes.
Fixed Resistivity Testing
Fixed resistivity testing is used to measure the electrical resistivity of granulated cokes produced by sintering. The electrical resistivity reflects the degree of bonding between particles and therefore provides an important indicator for the decision on the quality of granulated cokes. The principle of the measurement is to measure the electrical resistance of the sample within a certain range of temperature and pressure. The electric resistivity is usually expressed in μΩcm. High electric resistivity indicates a high degree of bonding which in turn indicates high quality.
Chemical Testing
Chemical testing is required in order to determine the chemical composition of the granulated cokes produced by sintering. This data is helpful in determining the consistency of the final product and can also be used as an indicator as to how well the sintering was conducted. There are several tests which can be used for this purpose such as ash testing, moisture testing, carbon analysis, volatile matter analysis and sulphur analysis.
Conclusion
Testing of granulated coke produced by sintering is an important process which is required to ensure that the final product is of the highest quality and is suitable for steel production. The most accurate and efficient way to measure this is by using an advanced testing facility and equipment. The three most commonly used testing methods are calorimeter testing, fixed resistivity testing and chemical testing. Each of these tests is vital in determining the quality of the granulated cokes produced by sintering.
