挤出滚圆技术对山梨酸钾堆密度的影响

Effect of extrusion-spheronization technique on the bulk density of preservative product potassium sorbate

应用挤出滚圆法制备山梨酸钾微丸,对影响堆密度的因素进行考察。采用了单个因素优选法,固定其它可变因素,逐一因素优选,达到最佳工艺参数的确定。选用1.5mm的筛板,以28Hz的挤出转数重复3次挤出,16Hz滚圆5min,通风干燥法干燥,可以得到较为理想的成球压缩率。挤出滚圆技术对防腐剂产造粒的意义在于,对于某些粉体进行2次成型加工(造粒),可以显著改变产品的堆密度,其对于产品运输成本的降低有一定意义。

To prepare potassium sorhate pellets by extrusion -spheroniza- tion and study the factors of decision bulk density. Adopting single factor optimize method, only study one factor base on fixing other changing factors to obtain optimal parameter technical. The perfect compression ratio can be reached by use of Ф1. 5 mm sieve plate, repeat thrice extrude in 28 Hz, spheronizing revolution at 16 Hz for 5 min, ventilated oven method . The significance of this work is to reduce transportation cost in the way of changing hulk density of the finally configuratiun of the product by applying secondary molding process （granulating） on powder.