Causes of nitrogen oxides in sulfuric acid roasting furnaces
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At present, our company has two sulfuric acid production systems; the raw materials used in both are the same. However, whenever baking is carried out in one of the workshops with pressure applied, nitrogen oxide levels rise, while no problems occur when baking is done without pressure. Do any of you have any suggestions? Thank you:P
It’s mainly of the thermal type; the higher the temperature, the more there is
With these two furnaces of mine, the one with a lower temperature has higher levels of nitrogen oxides
The main reason for the formation of nitrogen oxides is high temperatures of 800–1000°C
In such cases, high oxygen levels lead to high levels of nitrogen oxides. We are engaged in lead and zinc smelting; sulfuric acid and nitrogen oxides are related to the raw materials, and the levels of nitrogen oxides vary from one batch of material to another.
It is usually a problem with the raw materials; the amount of NOx generated during combustion is relatively limited. It is recommended to start by examining the differences in the raw materials used in each workshop