There are several categories of coal sampling machine
Peat flammability, easy combustion, strong reactivity, low sulfur content, low ash melting point, but lower mechanical strength. Therefore, the use of peat is not high value in industry, it is not suitable for long distance transportation, generally only as a local fuel use. Areas located in the southwest provinces and Zhejiang (West Lake coal).In June 2009, the State Administration of Quality Supervision Inspection and quarantine and the National Standardization Management Committee jointly issued the "national standard" classification of coal Chinese (GB/T 5751-2009), on the basis of dry ash free volatile Vdaf, dry ash free hydrogen bond index G, Hdaf, Y, glial layer maximum thickness of Oaxaca expansion degree B, low rank coal light the rate of P, and ash free calorific value Qgr, MAF 7 classification index, coal will be divided into 14 categories. The lignite, long flame coal, non caking coal and weakly caking coal, 1/ 2caking coal, gas coal, gas coal and 1/3 coking coal, coking coal, lean coal, lean coal, lean coal and anthracite.According to the different classification of the rock structure, can be divided into candle coal, silk carbon, dark coal, bright coal and mirror coal. Contains more than 95% vitrinite for coal, coal surface light, solid structure, containing vitrinite and light for plastid clarain, containing coarse body as dark as coal, with silk silk carbon, formed by many microspores formed for the microsomal cannel.
3 anthracite: there are powder and small pieces of the two, black and shiny metal. Fewer impurities, compact, high fixed carbon content, can reach more than 80%; the content of volatile low, below 10%, burning high, fire is not easy; but high heat, slow fire burning up just when the fire is relatively large, strong firepower, short flame and smoke less, long burning time, weak bond when burning, not easy to slag. Should be mixed with appropriate amount of coal to burn, in order to reduce the fire intensity.4, the degree of carbonation: peat shallow, low carbon content, water content, Mar can be as high as 90%, so the need to open air dry after use; peat ash melts easily, low calorific value, volatile content, so it is very easy to ignite.
1: lignite is massive, dark brown, shiny dark, loose texture, containing 40% volatile; burning low, easy to catch fire, burning fast ignition, flame and smoke; carbon content and low heat (due to different coal, calorific value difference), combustion short, frequent coal.2: General bituminous coal is granular, small block, or powder, is black and shiny, delicate texture, containing more than 30% volatile, ignition temperature is not too high, is easy to ignite; carbon content and calorific value of burning high, fast ignition, long flame, there are a lot of black smoke, the burning time is long; most viscous bituminous coal combustion, easy to slag.
There are three kinds of coal, lignite, bituminous coal and anthracite. The composition and quality of coal are different, and the calorific value is different. The unit mass of fuel combustion when the heat is called calorific value, which can produce 29.27MJ low calorific value of energy can be converted to 1 kg of coal equivalent (standard coal), and the standard conversion of coal consumption.
