| 摘要 |
<p>Powdered dephosphoration slag is mixed with at least two different binders, one of which is urea in amts. of 2-10% pref. 4% and the other, pref. a nitrate in amounts up to half that of the urea, the mixt. compacted and ground abracting the coarse granules. Up to 4% water may be used but no drying stage is required. The product contains 2-10% urea esp. 4%, 0.5% other fertilizer material and5% total N.</p> |
