Method for accurately determining ash in coal

Abstract

The invention discloses a method capable of accurately measuring ash content in coal. A muffle furnace is selected as a furnace body; a rectangular porcelain ash dish is selected; a drier and an analytical balance are selected; heat-resistant porcelain plates or asbestos plates are selected; Use the ash dish pre-selected and burned to a constant mass, weigh 1±0.1g of an air-dried coal sample with a particle size below 0.2mm, and spread it evenly in the ash dish so that the mass per square centimeter does not exceed 0.15g; send the ash dish into In the muffle furnace, close the furnace door and leave a 15mm gap in the furnace door, slowly raise the furnace temperature to about 500°C within 30 minutes, and keep at this temperature for 30 minutes, continue to rise to 815±10°C, and Burn at this temperature, take out the ash dish from the furnace, put it on a heat-resistant porcelain board or asbestos board, cool it in the air for about 5 minutes, move it into a desiccator to cool to room temperature, and weigh it; The mass after the last burning is the basis for calculation. The method can accurately detect the parameters of the ash content produced by the coal and has high efficiency.

Description

technical field [0001] The invention relates to a method, in particular to a method capable of accurately measuring the ash content 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 ser...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the low efficiency and large error of the above-mentioned existing detection methods, which cause the coal to fail to meet the expected requirements in subsequent use, and design a method that can accurately measure the ash content in coal. It can accurately detect the ash parameters produced by coal and then has high efficiency. The coal that meets the requirements after detection meets the requirements of environmental protection standards after combustion, avoiding environmental pollution. Problems that do not meet expectations