High-arsenic metal mineral powder arsenic removal equipment capable of enabling preheated flue gas to flow at 360 degrees

Abstract

The invention discloses high-arsenic metal mineral powder arsenic removal equipment capable of enabling preheated flue gas to flow at 360 degrees. The high-arsenic metal mineral powder arsenic removal equipment capable of enabling the preheated flue gas to flow at 360 degrees comprises a primary preheating furnace, a secondary oxygen control roasting furnace, a flue gas main pipe, a combustion chamber and an arsenic-containing gas treatment device. The primary preheating furnace is used for preheating high-arsenic metal mineral powder and comprises a preheating furnace inner kiln used for conveying the high-arsenic metal mineral powder and a preheating furnace jacket used for conveying high-temperature flue gas, and the preheating furnace jacket surrounds the periphery of the preheating furnace inner kiln. The secondary oxygen control roasting furnace is used for heating and pyrolyzing high-arsenic metal mineral powder and comprises a roasting furnace inner kiln used for conveying the high-arsenic metal mineral powder and a roasting furnace jacket used for conveying high-temperature flue gas, and the roasting furnace jacket surrounds the periphery of the outer wall of the roasting furnace inner kiln. The invention further provides an arsenic removal method for the high-arsenic metal mineral powder; and the high-arsenic metal mineral powder is firstly added into the preheating furnace inner kiln and then conveyed into the roasting furnace inner kiln, so that the high-arsenic metal mineral powder is pyrolyzed and gasified more sufficiently, the efficiency is higher, and meanwhile, the utilization rate of high-temperature flue gas is increased, and energy is effectively saved.

Description

[0001] This application is a divisional application of the original application, the filing date of the original application is November 12, 2020, the application number is 202011264074.8, and the title of the invention is "A device and method for removing arsenic from high-arsenic metal ore powder". technical field [0002] The invention relates to the field of solid waste treatment, in particular to a device and method for removing arsenic from high-arsenic metal ore powder with preheated flue gas flowing at 360 degrees. Background technique [0003] Arsenic and arsenic compounds are used in pesticides, herbicides, insecticides, and many kinds of alloys. The arsenic compound arsenic trioxide, known as arsenic, is a highly toxic substance. When the high-arsenic metal ore powder dearsenication equipment in the prior art performs pyrolysis and gasification to remove arsenic from high-arsenic metal ore powder, the pyrolysis and gasification is insufficient, the arsenic removal...

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Problems solved by technology

[0005] The invention provides a high-arsenic metal ore powder dearsenic equipment and method, which first preheats the high-arsenic metal ore powder through a primary preheating furnace, and then heats the high-arsenic metal ore powder through a secondary oxygen-controlled roasting furnace Pyrolysis to solve the problem of insufficient pyrolysis gasification and low arsenic removal efficiency when the high-arsenic metal ore powder de-arsenic equipment in the prior art performs pyrolysis and gasification of high-arsenic metal ore powder. The ore powder still contains a large amount of arsenic, and the technical problem of further processing of the metal ore powder is not used

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