Detection method and device of coke reactivity and post-reaction heat-treatability

Abstract

The invention discloses a detection method and device of the reactivity and post-reaction heat-treatability of coke and the method and device are used to detect the gasifying starting temperature, reactivity and post-reaction heat-treatability of coke. The detection method adopts an electric furnace as a heating furnace and uses an electronic balance for to weight. The reactivity detection method is performed on the condition of first heating and second keeping temperature constant, the electronic balance is used to measure the mass loss of a coke sample; and when the coke weight-loss ratio equals a specified value, the measurement weight-loss ratio (time) minus one is used as the reactivity index; the detection method of the post-reaction heat-treatability of coke is that when the coke weight-loss ratio equals the specified value, coke is continuously heated under the protection of inert gas, and the coke weight-loss ratio is used as the post-reaction heat-treatability index during the detection period of heat treatment. The detection device comprises the electronic balance, a reaction tube support, a reaction tube, the heating furnace and a heating furnace elevating mechanism. The method and device of the invention can provide 1500-1600 DEG C of detection temperature and the coke thermal characterization in the bosh (before an air port) and the hearth can be displayed.

Description

technical field [0001] The present invention relates to a method and device for evaluating the quality of blast furnace coke, in particular to a method and device for detecting the reactivity and post-reaction heat-treating property of blast furnace coke. technical background [0002] The anatomy of the blast furnace proves that the deterioration of coke in the blast furnace mainly occurs at the waist and bollard of the blast furnace, that is, the soft melting zone with a temperature of about 900-1300 °C. Due to the severe carbon gasification reaction in this area, the loss of carbon dissolution in the coke leads to the destruction of the coke structure, the sharp decrease of the coke bulk and strength, and the significant reduction of wear resistance. Iron smelters have believed for many years that the extent to which the coke passing through this area is destroyed determines whether the blast furnace runs straight. In order to evaluate the impact of carbon dissolution rat...

AI Technical Summary

Problems solved by technology

[0010] (2) The concept of reactivity is incomplete

[0012] (3) Lack of characterization of bosh (before the tuyere) and hearth coke thermal properties

[0014] If the above problems exist, the current coke reactivity and post-reaction strength test methods and test results may mislead the evaluation of the high-temperature properties of coke, and lead to unreasonable use of scarce and strongly caking coal

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