Method, system and application for collecting arsenic sulfide from arsenic removal flue gas in neutral atmosphere
A neutral atmosphere and arsenic sulfide technology, applied in the field of arsenic sulfide collection, can solve problems affecting the normal operation of the arsenic collection system, unsuitable for cooling collection and removal, unsuitable for arsenic sulfide collection, etc., and achieves simple structure, convenient operation, and stable effect
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Embodiment 1
[0121] Using the method disclosed in Chinese patent ZL 201610902405.3, the arsenic-containing refractory gold sulfide concentrate containing 8% arsenic was indirectly heated and roasted under nitrogen protection to form a neutral atmosphere flue gas with a volume content of 16% arsenic sulfide and a temperature of 700°C. First pass through the cyclone dust collector with external insulation to remove solid dust, and control the outlet temperature of the cyclone dust collection flue gas to 650°C; the flue gas after cyclone dust collection is introduced into 3 closed indirect condensers connected in series, and the initial temperature is 270°C Indirect heat exchange with saturated steam, and the average temperature of the cooling wall of the heat exchanger is controlled to 300°C. The saturated steam goes through the tube side, and the arsenic-containing flue gas goes through the shell side. In the 3 arsenic sulfide buffer tanks, through the automatic opening and closing of the in...
Embodiment 2
[0123] The arsenic-containing copper concentrate containing 3% arsenic is indirectly heated and roasted under the condition of nitrogen protection by the method disclosed in Chinese patent ZL 201610902405.3. The volume content of arsenic sulfide is 7%. Insulated cyclone dust collector removes solid dust and controls the outlet temperature of cyclone dust collection flue gas to 610°C; the flue gas after cyclone dust collection is introduced into two airtight indirect condensers connected in series, and indirect through heating oil with an initial temperature of 275°C Heat exchange, and control the average temperature of the heat exchange cooling wall to 310°C, the heating oil goes through the tube side, the arsenic-containing flue gas goes through the shell side, condenses the arsenic sulfide gas in the flue gas, forms a liquid collection, and flows into two arsenic sulfide buffers respectively In the tank, through the automatic opening and closing of the inlet and outlet valves...
Embodiment 3
[0125] The high-arsenic pyrite containing 10% arsenic is indirectly heated and roasted under the condition of nitrogen protection by the method disclosed in Chinese patent ZL 201610902405.3. The volume content of arsenic sulfide is 20%. Insulated cyclone dust collector removes solid dust and controls the outlet temperature of cyclone dust collection flue gas to 750°C; the flue gas after cyclone dust collection is introduced into 4 series-connected closed indirect condensers, and is indirectly replaced by nitrogen gas with an initial temperature of 280°C Heat, and control the average temperature of the heat exchange cooling wall to 320 ℃, nitrogen gas goes through the tube side, arsenic-containing flue gas goes through the shell side, condenses the arsenic sulfide gas in the flue gas, forms a liquid collection, and flows into 4 arsenic sulfide buffer tanks respectively Through the automatic opening and closing of the inlet and outlet valves on the buffer tank, the liquid arsenic...
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