| 摘要 |
PURPOSE:To obtain a snow-melting agent free from secondary pollution due to calcium chloride, with high spreading efficiency, especially suitable for orchard, gold course, etc., by grinding ash discharged from coal combustion unit or coal gasifier into size below a specific level followed by sieving treatment. CONSTITUTION:The objective snow-melting agent can be obtained by grinding dried granular and/or bulk product(s) from the ash discharged from coal combustion unit or coal gasifier into size <=2.5mm followed by sieving treatment. Preferably, the content of granules with a size <=88mum is <=10wt% in the above processes. This agent is incorporated with such ingredient(s) as ammonium sulfate, ammonium phosphate, urea, calcium carbonate powder or calcium oxide powder to apply to crops, orchard, roadside trees, etc.
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