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The destructive effect of fine fractions of soybean meal in transport processes

Drzewieniecka Beata

New Trends in Production Engineering

2018

Vol. 1, Iss. 1

393--398

Soybean meal is one of the most popular components of compound feed. The rise of its demand in the world causes a constant interest in this cargo and to conduct research in different directions. This is related to its inherent properties, and to the continuous changes that occur in it. Soybean meal is a solid bulk cargo. Loose soybean meal, apart from larger particles, also contains fine and dusty/ powdery fractions, which create the risk of explosion and environmental pollution. The problem of protecting the environment against dusting of fine fractions of soybean meal is very important in the cargo handling processes. An additional aspect is the destructive effect of powdery fractions during these processes. The results of the research on the degrading effect of fine fractions of soybean meal and its compounds on the means of transshipments were presented. Due to the interaction of esters and other compounds contained in the soybean meal, the research has the implications for the changes in the properties of the rubber elements of the elevator conveyor. The effect of these changes may be the reduced durability of the conveyor belts and the associated risks such as operational failures.

The importance of experimental parameters when testing the hardness of rubber

Hodson R., Lackovic S.

Elastomery

2002

T. 6, nr 3

17-24

Hardness is one of the most widely measured properties used to characterise rubber as it is a practical way of determining the degree of vulcanization of a sample. Two scales are in general use throughout the world - the IRHD (International Rubber Hardness Degree) scale and the Shore scale. The two test methods use totally different indenture geometries, applied forces, test times and procedures. This paper looks at the instruments in question, studies the differences between the tests and their relationship between scales where possible. It also highlights the merits of each instrument and test type.

Twardość jest najczęściej mierzoną właściwością charakteryzującą gumę i stanowi praktyczny sposób oznaczenia stopnia zwulkanizowania próbki. Ogólnie na świecie używane są dwie skale: IRHD (International Rubber Hardness Degree) i Shore'a. Te dwie metody badania całkowicie różnią się pod względem geometrii czujnika, przyłożonej siły, czasu pomiaru i procedur. W artykule przedstawiono różnice między tymi badaniami i możliwe relacje między skalami (twardości). Wyjaśniono także zasadę działania każdego z aparatów i typ pomiaru.