In the smelting and blowing process of zinc slag, a phenomenon called return to dryness sometimes occurs. This phenomenon is caused by overheating of the zinc slag, and it will seriously affect the quality of the smelting, therefore it is necessary to solve this problem.
The causes of “return to dryness” in the smelting and blowing process are various, including excessive hot blast temperature, insufficient cooling rate of zinc slag, incomplete sinking and accumulation of slag, and unevenness of furnace temperature distribution. In addition, the structure and operational parameters of the blast furnace also affect the occurrence of this phenomenon.
In order to reduce the “return to dryness” of zinc slag during the smelting and blowing process, it is necessary to adjust the hot blast temperature according to the actual furnace condition, so as to remain within the appropriate range. In addition, cooling rate of zinc slag should be appropriately improved, suitable slag accumulation and storage way should be adopted, and reasonable furnace temperature distribution should be maintained.
Moreover, reasonable operation parameters like air volume, air pressure, etc. should be determined, and reasonable operational procedure should be established. In order to effectively solve the “return to dryness” problem, it is necessary to improve the efficiency of zinc slag smelting and blowing system, and constantly carry out comprehensive tests to find better solutions.
In conclusion, “return to dryness” of zinc slag in smelting and blowing process should be properly addressed, and rational operation should be carried out in combination with reasonable structural design and operation parameters. The smelting and blowing system should also be improved in terms of operation efficiency, and comprehensive tests should be regularly conducted to optimize the operation.
