Material handling assessment

The effects of attrition on a given particulate material may be assessed in many different ways. One may base this assessment on the observation of an individual particle. Alternatively, the fate of a group of particles may be examined, or the effect of attrition on the bulk properties of a powder may be taken forthis assessment. The British Materials Handling Board (1987) and Bemrose and Bridgwater (1987) have given a lot of examples for the different methods. 

This paper will focus on the application of solid state modeling techniques to one particular particle property - crystal habit. A morphological study on the analgesic aspirin (C9H8O4) will be presented in order to assess the effects of morphology on processing, and materials handling. The crystal chemistry will be... 

The following sections review some methods to quantify performance and lifting capability of isolated trunk muscles during a multilink coordinated manual materials-handling task. Relevant factors that influence the static and dynamic strength and endurance measures of trunk muscles will be addressed, and the clinical applications of these assessment techniques will be illustrated. 

Current information regarding the configuration and capabilities of processes and facilities, properties of materials handled, potential health, safety, and environmental hazards and regulatory requirements is essential to assess and manage risk. ... 

The most appropriate basis of safety for a given situation or plant/process combination is determined by many factors including the plant design, its operation and the materials handled. A careful and systematic assessment of the potential hazards is therefore required. There are essentially two basic approaches to process safety where flammable solvents are involved, namely, explosion prevention and explosion protection. 

As part of an internal pre-feasibility assessment, MIM developed the preferred material handling system flowsheet to a single option, which included a new 3.5 Mt/y capacity shaft haulage system located adjacent to the GFN orebodies. 

The FHA process usually begins with the establishment of a list of system or subsystem functions. Hazards are then postulated on the basis of the failure and/or likelihood of failure of each function. Then, the overall probable effect of the hazard on the system and those operating it (i.e., people) is derived. Once identified, this overall probable effect is known as the failure condition. The severity of the failure condition is assessed and a hazard severity classification is assigned to it. This severity class will determine the maximum allowable probability for each failure condition. In extremely critical systems or operations, such as an elevator braking device/system or materials-handling operations, for example, very low maximum allowable probabilities identified in an FHA will mandate the prohibition of single-point failures. 

There is always the temptation to stretch any limit to the full, especially if it is difficult or very time consuming for the plant operator to have a new safety assessment carried out or to have new safe operating conditions specified. An example of this would be where a limit for specific equipment had been set at X percent, the actual material handled could vary a little in enrichment and the operator be tempted to talk in average enrichment terms. This need not be an unsafe approach if some further limits to this averaging, i.e., a maximum range had also been assessed and fixed. 

Material Handling Risk Assessment/Dropped Objects... 

The assessment of the material s strength is commonly based on so-called friability tests or attrition tests (cf. Sec. 4), in which a single particle or a bulk sample of the material is for a certain extent subjected to a specific stress. Data from these tests are usually presented as single numbers called friability or attrition indices. Most of these numbers are derived from a comparison of the material s content of a previously defined fraction of fines before and after the test (British Materials Handling Board, 1987 Davuluri and Knowlton, 1998). 

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