Manganese oxide reduction system of internal heating type rotary kiln

Abstract

The invention discloses a manganese oxide reduction system of an internal heating type rotary kiln, which comprises a preheating drying kiln, the internal heating type rotary kiln, a powder spraying type combustor, a water cooling conveyer and a desulphurization dust removing tower, wherein the preheating drying kiln, the internal heating type rotary kiln, the powder spraying type combustor and the water cooling conveyer are connected sequentially in an inclined manner; the preheating drying kiln is a feed end of the system, and the water cooling conveyer is a discharge end of the system; and the desulphurization dust removing tower is connected to a feed end of the preheating drying kiln through a fan and a pipeline. The desulphurization dust removing tower is a countercurrent rotation type water film desulphurization dust removing tower and includes a tower body made of plastic. A lower part of the tower body is provided with an inlet chamber, an upper end is provided with an emptying chimney, and an upper part in the tower body is provided with a spraying device, a multi-layer water diversion sieve plate and a tilting swirling flow plate. The water diversion sieve plate is arranged below the spraying device. The tilting swirling flow plate is arranged between the water diversion sieve plate and the inlet gas. The manganese oxide reduction system of the internal heating type rotary kiln used for producing electrolysis manganese metal largely reduces the production of waste residue, and has advantages of high mechanization degree, high productivity, and strong technique continuity.

Description

technical field [0001] The invention relates to an internal heating rotary kiln reduction manganese oxide system, Background technique [0002] Because natural manganese oxide (MnO 2 , Mn 2 o 3 , Mn 3 o 4 Mixture) It cannot directly react with sulfuric acid to generate manganese sulfate, therefore, it cannot be used directly in industries such as electrolytic manganese metal, electrolytic manganese dioxide, chemical manganese dioxide and manganese sulfate. If you want to use it, you must use a method to restore it to MnO before it can be used. At the same time, more than 60% of the manganese in the earth's surface crust exists in an oxidized state. This oxidized manganese ore has a high grade, and the steel industry all over the world uses this ore to produce semi-finished products such as ferromanganese and silicon-manganese alloys through blast furnace smelting and reduction, and then enters the steelmaking furnace. [0003] For nearly half the world, many people ha...

AI Technical Summary

Problems solved by technology

Wet reduction has several key issues that cannot be resolved: ①SO 2 Production of electrolytic manganese is the problem of acid balance cannot be solved

②The reduction speed is slow and the efficiency is low, making it impossible to carry out large-scale production

③ Due to the impurity brought in by the reducing agent used in the wet method and the influence and negative effects of the reducing agent itself on the electrolysis section, it is difficult to solve the process flow of the post-treatment section and the process requirements are relatively high

The equipment is easy to be damaged if it is operated at high temperature for a long time

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