Experimental method of coal quality testing equipment

experimental method
1. Full water (Mt)
Weigh 10-12 g of coal samples under 6 mm to 0.001 g, put it in a blast drying oven heated to 105-110 degrees in advance, dry the anthracite for 3 hours, take out the bituminous coal for 2 hours, and cool it in the air After about 5 minutes, put it in a desiccator for 15 minutes and weigh it (without a desiccator, cool the sample to room temperature).
Total water = (reduced part mass / sample weight) * 100
2. Analysis of water (Mad)
Weigh 1 gram of coal sample under 0.2 mm to the nearest 0.0001 gram, put it in a blast drying oven heated to 105-110 degrees in advance, dry anthracite for 1.5 hours, take it out after drying for 1 hour, and cool it in air for about 5 After 15 minutes, put it in a desiccator and weigh it after 15 minutes (without a desiccator, cool the sample to room temperature).
Analysis water = (reduced part mass / sample weight) * 100
3. Ash (Aad)
Ø Turn on the power of the high-temperature furnace, press the "Options" key to make "Project" display "2", then press "Start" and "Mute", "Program" displays "1" key, the instrument automatically heats up to 850 degrees, "Program" displays " 2 "rear alarm
Ø Weigh 1 gram of coal sample below 0.2mm with ash dish to the nearest 0.0001g
Ø Open the furnace door, place the sample at the door of the furnace, slowly push the sample into the high temperature zone in the center of the furnace, (Caution! Do not deflagrate the coal sample, the chimney valve should be opened) Then close the furnace door and press the "trigger" key, the instrument The alarm ends automatically after 40 minutes of constant temperature of 815 degrees
Ø After taking out, it is cooled in the air for about 5 minutes, then placed in a desiccator for 15 minutes and weighed (without a desiccator, the sample is cooled to room temperature).
Ø Ash = (weight of residue in ash dish / weight of sample) * 100
4. Volatile matter (Vad)
Ø Turn on the power of the high-temperature furnace, press the "Options" key to make the "item" display "6", then press the "start" and "silence", "program" display "1" key, the instrument automatically heats up to 920 degrees "program" display " 2 "rear alarm
Ø Weigh 1 g of coal sample below 0.2 mm in a volatile crucible to the nearest 0.0001 g
Ø Open the furnace door and place the sample at the furnace door, quickly put the sample into the high temperature zone in the center of the furnace, (Note! The chimney valve should be closed, and the furnace temperature must rise to 900 degrees within three minutes) Then close the furnace door and press "trigger" "Key, the instrument will automatically maintain a constant temperature of 900 degrees for 7 minutes. 6 minutes and 30 seconds alarm 7 minutes after the whole take out
Ø After taking out, it is cooled in the air for about 5 minutes, then placed in a desiccator for 15 minutes and weighed (without a desiccator, the sample is cooled to room temperature).
Ø Volatile content = (reduced part weight after ignition / sample weight) * 100 – Mad
Hebi Tianyu Instrument Manufacturing Co., Ltd.

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