AGGLOMERATION STUDY OF COAL WASHING WASTE BY USING MEDIA OF JATHROPA OIL AND DIESEL OIL

• Main Author: WICAKSONO , ANTON
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/11843
• Institution: Institut Teknologi Bandung

Waste of coal washing usually still contains fine-sized coal. There is a possibility that its clean coal can be taken if it is separated from the dirt. One of the effective methods to separate fine coal from the dirt is method of oil agglomeration. The basic principle of the method of oil agglomeration is simple. It is by mixing coal with oil. The coal with its hydrophobic nature sticks to oil and form agglomerate. So, the coal will be separated from the dirt, with its hydrophilic nature, will be left with water. The samples are taken from the coal-washing waste of PT. ABC and PT. XYZ. The use of jathropa oil is based on the consideration that this oil is environmentally friendly and renewable, while diesel oil is used based on the consideration that it can be easily found in the market. From the study conducted, each waste has different characteristic depending on the coal type. In general, the bigger the solid-matter number agglomerated, the bigger the % yield produced and the smaller the content of ashes in it. The more oil used, the % yield will increase and the content of ash will decrease. The jathropa oil is better used for agglomeration medium of the coal-washing waste than diesel oil. At this experiment, coal waste of PT KPC is better aglomerated than that of PT. ABC. The highest result of agglomeration of coal- washing waste to the % yield is 97,04 %, obtained from the agglomeration of coal-washing waste at PT. ABC by using jathropa oil + additive with variables of solid matter as much as 2 % and oil content as much as 50 % of the solid. The lowest ash content of 4,24% is resulted from the agglomeration of the coal-washing waste at PT. DEF by using jathropa oil+ additive with variables of as much as 3 % solid and 30% oil content of the solid. The addition of additive substance of pine oil increases the agglomeration result, that is the increase of the % yield and the decrease of ash content. Oil agglomeration is more effective to be used in finer-sized fractions. In this coal-washing waste at PT Arutmin, the smallest ash content is resulted from grain-sized fractions of <325 mesh.