Method for accurately measuring evaporated mass in coal

A quality and accurate technology, applied in the direction of weighing by removing certain components, can solve problems such as large errors, low efficiency, and low efficiency of detection methods, and achieve the effects of solving low efficiency, improving detection efficiency, and improving accuracy

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A quality and accurate technology, applied in the direction of weighing by removing certain components, can solve problems such as large errors, low efficiency, and low efficiency of detection methods, and achieve the effects of solving low efficiency, improving detection efficiency, and improving accuracy

CN107764686AInactive Publication Date: 2018-03-06陈飞

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[0022] The method capable of accurately measuring the volatile mass in coal comprises the following steps:

[0023] (1) Selection of equipment: use a porcelain crucible with a tightly fitted cover, and a crucible with a total mass of 15-20g as a volatile crucible; choose a pyrometer and a temperature adjustment device, which can maintain the temperature at 900 ± 10 ℃, and there is a muffle furnace with sufficient constant temperature zone (900±5℃) as the furnace. The heat capacity of the furnace is when the initial temperature is 920 ℃. , and return to 900±10°C within 3 minutes. There is a vent hole on the back wall of the furnace and a small hole for inserting a thermocouple. At 20-300mm from the bottom of the furnace, the constant temperature zone of the muffle furnace should be measured with the furnace door closed, and should be measured at least once every six months, and the pyrometer (including millivoltmeter and thermocouple) should be calibrated at least once every si...

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Abstract

The invention discloses a method capable of accurately measuring the volatile mass in coal. A crucible for volatile matter and a crucible frame are selected; a pyrometer and a temperature regulating device are selected; a crucible frame clamp and an analytical balance are selected; Type or lever type cake press machine; use a stopwatch and dryer; use a porcelain crucible with a cover that has been burned at a temperature of 900 °C to a constant quality, weigh the air-dried coal sample, and then gently shake the crucible to flatten the coal sample , placed on the crucible rack, lignite and long-flame coal should be pre-pressed cakes, and cut into small pieces of about 3mm, pre-heat the muffle furnace to about 920 ° C, open the furnace door, and quickly put the crucible on the shelf Send it into the constant temperature zone and close the furnace door, heat accurately for 7 minutes, take out the crucible from the furnace, cool it in the air for about 5 minutes, move it into a desiccator to cool to room temperature, weigh it; calculate the result. The method can greatly improve the detection accuracy, and improve the detection efficiency, so that the detected coal can meet the expected requirements when used.

Description

technical field [0001] The invention relates to a method, in particular to a method capable of accurately measuring the volatile mass in coal. Background technique [0002] Coal is a solid combustible mineral that was gradually formed by ancient plants buried underground through complex biochemical and physicochemical changes. It is a kind of solid combustible organic rock, which is mainly formed by biochemical action of plant remains, and then transformed by geological action after burial, commonly known as coal. Coal is known as black gold and the food of industry. It has been one of the main energy sources used by the human world since the eighteenth century. Coal is a layer of extremely thick black humus accumulated on the ground from the branches, leaves and rhizomes of plants for millions of years. Due to the changes in the earth's crust, it is continuously buried in the ground, isolated from the air for a long time, and under high temperature and pressure. After a s...

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Application Information

Patent Timeline

06 Mar 2018

Publication

CN107764686A

IPC: G01N5/04

CPC: G01N5/04

Inventors: 陈飞