EXPERIMENTAL STUDY AND CHARACTERISTIC ANALYSIS ON CLEANED COAL LOGS

As a special briquette for long distance pipeline transportation and direct cleaned combustion the cleaned coal log reflected two technologies of coal pipeline transportation and coal cleaned combustion. In order to manufacture cleaned coal logs with high strength and high rate of sulfur-fixing, the technology of coal log compaction and the sulfur-fixing mechanism were studied and different cements and sulfur-fixing agents were analyzed. And the reasonable technology for manufacturing cleaned coals logs has been designed and compound additives with high effect of cement and sulfur-fixing have been compounded. In addition, by means of characteristic experiments about strength, wear in pipeline transportation, waterproof property and sulfur-fixing five different cleaned coal logs made with different additives have been measured. Experimental results indicated that the manufacturing technology of cleaned coal logs was reasonable and the formula of sulfur-fixing cements was scientific.The cleaned coal logs made up with the fourth coal-additive combination had high strength, good waterproof property and high ratio of sulfur-fixing, and achieved the performance require.