Li Xinchuang stated that the future development trend of the steel industry is to increase the number of pulverized coal injections in blast furnaces and reduce the coking ratio of ironmaking. According to 2015, he produced 700 million tons of steel, 665 million tons of pig iron, 143 kg/t iron in blast furnaces, and 825 kg/t iron in the average iron-to-coking ratio of ironmaking. It is expected that the total amount of coke in China's steel industry will be about 33. , 2.5 million tons, of which ironmaking industry consumes about 256 million tons of coke. In addition, if we include the amount of coke used in other industries such as chemicals and machinery, it is expected that in 2015 China will require a total amount of coke of 380,200 to 390 million tons.
According to Li Xinchuang's forecast, the country's coking coal production in 2015 was 1.32 billion tons, of which the production of primary coking coal and fat coal was 410 million tons. According to the national demand for coke output of 38,200 to 390 million tons in 2015, it is estimated that by 2015, the national coal coking coal requirements (dry coal) will be 774 to 789 million tons, of which the requirements for primary coking coal and fat coal will be 4.26~ 434 million tons.
He said that the total amount of coking coal can basically meet the needs, but from the point of view of coal, especially considering the coal ash and sulfur, the main coking coal and fat coal gap 0.2-0.3 billion tons, and thus is expected to 2015 China still needs a lot of imported coking coal.
The finned tube is to improve the heat exchange efficiency. By adding fins on the surface of the heat exchange tube, the outer surface area (or inner surface area) of the heat exchange tube is increased, so as to achieve the purpose of improving the heat exchange efficiency. Such a heat exchange tube . Usually used for heat exchange between liquid and gas.
Finned tube is a heat exchange element. As a heat exchange element, finned tubes usually work under high-temperature flue gas conditions for a long time. For example, the finned tubes usually used in boiler or harsh environments, high temperature and high pressure, and in a corrosive atmosphere. This requires that the finned tubes should have high anti-corrosion properties, Anti-wear properties, lower contact resistance, higher Stability and anti-dusting ability.
There are many types of finned tubes, and new varieties are constantly emerging. According to the classification of processing technology, there are extruded fin tube; high frequency welded finned tubes; rolled formed finned tubes; suit formed finned tubes ; cast finned tubes; tension wound finned tubes; Inserted tubes.
According to the shape of the fins, there are square finned tubes; circular finned tubes; spiral finned tubes; longitudinal finned tubes; corrugated finned tubes; spiral serrated fins Helical Serrated Finned Tubes; pin-shaped finned tubes; integral plate-shaped finned tubes; inner finned tubes.
According to whether the fin material of the finned tube is the same as that of the base tube, it can be divided into: single metal finned tube, bimetallic composite finned tube.
Single metal finned tubes are classified by material into copper finned tubes; aluminum finned tubes; carbon steel finned tubes; stainless steel finned tubes; cast steel finned tubes.
Finned Tube,Extruded Fin,Brown Fin Tube,Longitudinal Finned Tube
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