Pyrite production
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Can pyrite acid-making slag be directly burned into black? What method should be used?
This is the process of making acid. Cannot be burned alone
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Can. In the roasting of pyrite, it is sufficient as long as the environment is in weak oxygen roasting. Specific practices: When the wind pressure of the furnace bottom fan is stable, slowly increase the amount of charge added so that most of the oxygen in the air is used for roasting pyrite. There is very little oxygen left in the furnace gas. At this time, the slag will turn black. Note that when adding more charge, the amount of charge must be very high, otherwise it will cause high-temperature scarring.
What you said above makes sense, but the furnace cleaning cycle is too short:'(
To burn into black slag, it is sufficient to control the low oxygen content during roasting. During roasting, part of ferric oxide will be generated and less ferric oxide will be generated, and magnetic roasting can be performed.
It seems that people just use an oxygen meter or control the color of slag or dust.
Adopt weak oxygen roasting. Use oxygen meter control. Pay attention during operation: 1. Do not overdo it and increase pressure on the electrostatic precipitator. 2. Do not produce too much sublimated sulfur, which will clog equipment (such as scrubbers) during purification. This is a matter of experience and requires operators to have a high sense of responsibility.