Mining is a dust prone occupation and almost every major process in mining contributes to the atmospheric load of suspended particulate matter. Prolonged exposure of this dust is known to cause various respiratory diseases including deadly pneumoconiosis among the miners. The Central Institute of Mining and Fuel Research, Dhanbad has contributed significantly in the area of dust assessment and ...

The first staff member to become ill did not consume the potato pie or rice pudding. Nonetheless, the staff member reported handling and cracking the raw eggs included in the rice pudding. The staff member reported that the exterior surfaces of the shell eggs were visibly contaminated, however, there were no reported breaks in the integrity of the eggshells. A trace-back investigation identifie...

Natural fibers are a material that is easily obtained from nature, both animals and plants. Using natural has been commercially applied in various fields, such as automotive construction, by mixing PPHI (Polypropylene High Impact) with injection molding forming plastic pellets. Pellets extruded pineapple fiber for composite, which requires composite pellet-making machine, combines two materials...

The existing technology for processing solid household waste (MSW) at transfer stations in the city of Tashkent does not allow obtaining high-quality raw materials compost production. In this regard, a crushing and screening complex has been developed to produce with low energy material consumption. carried out theoretical experimental studies made it possible determine that rotor blades should...

Operational flexibility in an aggregate production process is required to adapt changes customer demands. Excessive demand for a particular product fraction can lead operational alteration wherein re-crushing of the existing larger-sized necessary. The choice fractions results feed condition crusher. One common approach producing desired by varying operation settings crusher crushing plant. How...

Nacrtak An experiment on comminution of logging residues with a tub grinder was carried out in order to calculate the productivity and procurement cost of wood chips. At the investigated site, the tub grinder had a hammer mill crusher at the bottom of the tub, and a grapple loader and a bucket loader worked as auxiliary machines for the grinder. As a result, the productivity of the tub grinder ...

Dust exposure levels were studied in a cement factory in Dar es Salaam, Tanzania, as part of an epidemiological study assessing chronic respiratory health effects. One hundred and twenty personal 'total' dust samples were collected from 80 randomly selected workers from eight a priori occupational groups (OGs) based on work areas using a 37 mm Millipore sampler. The between-group, within-group ...

The allometric method, which often is attributed to Julian Huxley, entails fitting a straight line to logarithmic transformations of the original bivariate data and then back-transforming the resulting equation to form a power function in the arithmetic scale. Development of the technique was strongly influenced by Huxley's own research on growth by the enlarged 'crusher' claw in male fiddler c...

The effectiveness of jigging operation for the beneficiation of low-grade iron ore deposits of Orissa, India has been investigated. Iron ore sample obtained from Barbil region of Orissa containing very high amount of silica and alumina was crushed using the laboratory jaw crusher and roll crusher to prepare different particle sizes. The sink and float tests were carried out to evaluate the poss...