Method for removing sulfur components in petroleum coke through using sodium hydroxide/potassium carbonate melting process

Abstract

The invention relates to a method for removing sulfur components in petroleum coke through using a sodium hydroxide / potassium carbonate melting process. The method which uses alkali-coking mix calcining concretely comprises the following steps: mixing solid sodium hydroxide / potassium hydroxide with the petroleum coke having a certain granularity, and calcining in a muffle furnace at a certain temperature for a certain period of time. C-S bonds are broken through reacting with sulfur (comprising organic sulfur and inorganic sulfur) in the petroleum coke, the desulphurization effect is obvious, the desulfurization rate reaches above 98%, and the sulfur in the petroleum coke decreases to below 0.1% and even reaches 0.01% reaching a first-grade coke standard. The desulphurization effect is best when the alkali-coke ratio is 0.5-2, and the alkali application amount is less.

Description

technical field [0001] The invention relates to the field of removing harmful elements in industrial petroleum coke, in particular to the field of using sodium hydroxide / potassium to melt and remove sulfur components in petroleum coke. Background technique [0002] Petroleum coke is the main raw material for the preparation of prebaked anodes for aluminum, generally accounting for about 65% of the weight of the anode, and its quality has a significant impact on the behavior of the anode in the electrolytic cell and the operating performance of the anode production. In recent years, with the rapid development of the electrolytic aluminum industry, the development of the carbon industry has been greatly promoted. In addition, the expansion of the steelmaking industry has also increased the demand for petroleum coke used in the production of electrodes, thus the demand for high-quality low-sulfur The demand for petroleum coke is increasing, resulting in a shortage of high-quali...

AI Technical Summary

Problems solved by technology

[0009] Items ①, ②, and ③ all involve high-temperature treatment of petroleum coke. Due to high-temperature treatment, 30% of the quality may be lost. In addition, the desulfurization of petroleum coke is incomplete, resulting in high energy consumption and high cost. Item ④ involves high-temperature lye, which will cause the lye to volatilize. In the case of large-scale production, it is very dangerous and causes high equipment requirements, and at the same time a large amount of lye

The cost of comprehensive assembly is high; ⑤This item is similar to our method

However, it enters the next stage of circulation without treating the mixed acid soaking solution, resulting in a very low desulfurization rate of only 45-60%.

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