Method for improving carbonylation rate of carbonylation slag through vulcanization treatment

Abstract

The invention relates to a method for improving the carbonylation rate of a carbonylation slag through vulcanization treatment. The method comprises the following steps that the carbonylation slag ina reduction furnace at a certain ratio condition of a certain temperature, flow rate, cloth thickness and time, hydrogen and the sulfur dioxide mixed gas is subjected to a vulcanization reaction, andthe temperature of the reducing furnace is controlled to be 500-600 DEG C; a mixed gas vulcanization section of hydrogen and sulfur dioxide is in the reduction furnace, and the hydrogen flow is 10-50Nm3 / h, the sulfur dioxide flow is 4-10 Nm3 / h, wherein the ratio of the hydrogen and the sulfur dioxide in the mixed gas is between 7:1 and 4:1; the thickness of the carbonyl slag material layer is 3-6cm; and the reduction time of the carbonylation slag in the reduction furnace is more than 3 h. The method is simple and convenient to operate, obvious in effect, easy to implement and capable of realizing reutilization of wastes; through detection, the amount of metal in the carbonylation slag after re-carbonylation reaction is reduced from 60.5-10.20%, and the reduction effect is obvious.

Description

technical field [0001] A method for increasing the carbonylation rate of carbonylation slag through sulfidation treatment relates to a method for increasing the carbonylation rate of raw materials by treating nickel raw materials with a technical method of introducing a certain proportion of hydrogen and sulfur dioxide mixed gas for reduction. Background technique [0002] At present, due to the characteristics of the carbonylation process in the production process, after the raw materials are added to the kettle and reacted for a period of time, in order to control the production cost, the liquid production volume drops to a certain amount and the slag is stopped to unload. The carbonylation slag contains a lot of metals It cannot be treated as general waste, but the cost of re-entering the reactor is relatively high, so it is piled up all the year round, occupying a lot of space while the amount of metal cannot be recycled. Contents of the invention [0003] The purpose ...

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Problems solved by technology

[0002] At present, due to the characteristics of the carbonylation process in the production process, after the raw materials are added to the kettle and reacted for a period of time, in order to control the production cost, the liquid production volume drops to a certain amount and the slag is stopped to unload. The carbonylation slag contains a lot of metals It cannot be treated as general waste, but the cost of re-entering the reactor is high, so it is piled up all the year round, occupying a lot of space while the amount of metal cannot be recycled.