Apparatus and method for studying the influence of alkali metals on coke reactivity under the condition of water vapor and carbon dioxide

Abstract

The invention relates to a device and a method for studying the influence of alkali metal on coke reactivity under the condition of water vapor and carbon dioxide. The experimental equipment includes heating system, reaction system, weighing system, gas control system and water vapor generation system, etc. After the coke is placed in the hanging basket, it is suspended under the weighing device through the hanging wire; the quartz tube reactor is equipped with a thermocouple and a porous plate; the flow of nitrogen and carbon dioxide is controlled by a mass flow controller, and the aqueous solution containing sodium carbonate or potassium carbonate is input into the resistance furnace After the gasification of the lower part, the flow of the aqueous solution is precisely controlled by the peristaltic pump, and the flow of the water vapor is indirectly controlled. The advantage of the present invention is that water vapor, carbon dioxide and alkali metals are simultaneously applied to coke gasification reactivity experiments, and the precise control of water vapor flow rate and alkali metal content in the reaction atmosphere is realized through the peristaltic pump, and then the carbon dioxide and water vapor mixed atmosphere can be realized. Experimental study on the reactivity of coke gas gasification, and reduce the amount of coke used to 10g.

Description

technical field [0001] The invention relates to the field of ironmaking in the metallurgical industry, in particular to a device and method for studying the influence of alkali metals on coke reactivity under the conditions of water vapor and carbon dioxide. Background technique [0002] The reactivity of coke refers to the reaction between coke and CO at a certain temperature. 2 The relative rate at which the gasification reaction occurs. With the wide application of blast furnace coal injection technology, H in blast furnace gas 2 As the content increases, the influence of indirect reduction product water vapor on coke reactivity cannot be ignored. Study a certain percentage of CO 2 The gasification reactivity of coke in a mixed atmosphere with water vapor is the main content to reveal the transformation process of coke in blast furnace. The gasification rate refers to the gasification degree of carbon element per unit time, and the gasification rate refers to the chan...

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Problems solved by technology

The device and method provided by the invention can solve the problem of simulated blast furnace CO 2 The problem of the influence of alkali metal steam on coke reactivity in a mixed atmosphere with water vapor can realize the gasification reaction of coke under the simulated blast furnace atmosphere, which effectively makes up for the problem that the existing research methods cannot accurately measure the influence of alkali metal on coke reaction; specifically, By measuring the weight loss of the sample during the reaction process with a high-precision balance, it is possible to accurately characterize the influence of reaction gas conditions and alkali metals on coke reactivity, and perform kinetic analysis

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