Coal preparation: computer simulation of plant performance
The first phase of a computer simulation model of the coal preparation process is described. The operations of crushing, screening, and cleaning are simulated. A proposed later phase of modeling would include dewatering and thickening devices, effects of crushing and quality constraints, and capital and operating cost economics. The present simulation model allows for 30 separate pieces of equipment, 25 flowstreams interconnecting the equipment, and 3 recycle streams all interconnected at the discretion of the user. Washability analyses of the raw coal, including 22 size increments and 10 specific gravity fractions, are allowed. Simulator output data can be varied to meet the user's needs. By specifying the quality of raw coal feed and pieces of equipment, the user is able to simulate a variety of coal preparation configurations. The example presented is that of a plant including a Baum jig, concentrating table, and froth flotation as cleaning equipment. A rotary breaker is used to crush the coal. The basic input data is washability (float-and-sink) data of raw coal. The full range of quality determinations is obtained using standardized ASTM methods. A laboratory designed and equipped in this manner is able to process the raw coal to obtain the basic data required for the computer simulation model and then proceed to predict full-scale coal preparation circuit performance. The model serves as a useful tool in the preliminary planning of alternative circuits and comparing the potential cleaning of various coals.
- OSTI ID:
- 6569270
- Journal Information:
- Colo. Sch. Min., Miner. Ind. Bull.; (United States), Journal Name: Colo. Sch. Min., Miner. Ind. Bull.; (United States) Vol. 21:1; ISSN CSMIA
- Country of Publication:
- United States
- Language:
- English
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