Compression testing of granular NPK fertilizers

被引：41

作者：

Walker, GM

Magee, TRA

Holland, CR

Ahmad, MN

Fox, N

Moffatt, NA

机构：

[1] Department of Chemical Engineering, Queen's University of Belfast

[2] Irish Fertilizer Industries, Belfast BT3 1AP, Herdman Channel Road

来源：

NUTRIENT CYCLING IN AGROECOSYSTEMS | 1997年 / 48卷 / 03期

关键词：

break strength; compression testing; conditioners; fertilizer caking; NPK fertilizers;

D O I：

10.1023/A:1009714306464

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The crush strength of granular NPK fertilizer has been accurately determined using Instron compression testing equipment. Stress-strain analysis shows a distinctive break point followed by break up of granule fragments. The force required to crush the granules is a function of the granule diameter but the calculated pressure required to crush each granule remained relatively constant. Factors such as moisture ingress and coating oils have been shown to affect granule strength. A direct link between caking of granular fertilizers and crush strength has been established.

引用

页码：231 / 234

页数：4