Gujiao ( Chinese : 古交市 ; pinyin : Gǔjiāo Shì ) is a county-level city of Shanxi Province , North China , it is under the administration of the prefecture-level city of Taiyuan . The estimated population of Gujiao in 2017 is about 222,000.
11-480: Gujiao is located in central Shanxi. It's a county-level city, part of the prefecture-level city of Taiyuan, the capital of Shanxi province. Its geographical area is in between latitude of 37° 40'-38° 8' N, and longitude of 111° 43'-112° 21' E. It's connected to the Wanbailin district of Taiyuan to the east, Loufan county to the west, Yangqu county and Jingle county to the north and Qingxu county and Jiaocheng county to
22-454: A blast furnace, as the coke supports part of the ore and flux burden inside the furnace. Metallurgical coal contrasts with thermal coal , which does not produce coke when heated. Because of their different end-uses, prices for the two types of coal are usually quite different. The suitability of coal for conversion to coke is also referred to as the caking ability . There are several types of metallurgical coal: This geology article
33-519: A division that produces coal for coking, to ensure a stable and low-cost supply. Metallurgical coal comes mainly from Canada, the United States, and Australia, with Australia exporting 58% of seaborne trade, mostly going to China. In the United States, the electric power sector used "93% of total U.S. coal consumption between 2007 and 2018"; only 7% of the total was metallurgical coal and coal for other uses such as heating. Metallurgical coal
44-449: Is about 2.65 billion tons. The coalbed methane reserve is about 5.66 billion cubic meters. Metallurgical coal Metallurgical coal or coking coal is a grade of coal that can be used to produce good-quality coke . Coke is an essential fuel and reactant in the blast furnace process for primary steelmaking . The demand for metallurgical coal is highly coupled to the demand for steel. Primary steelmaking companies often have
55-432: Is low in ash, moisture, sulfur and phosphorus content, and its rank is usually bituminous . Some grades of anthracite coal are used for sintering , pulverized coal injection , direct blast furnace charge, pelletizing , and in production of ferro-alloys, silicon-manganese, calcium-carbide and silicon-carbide. Metallurgical coal produces strong, low-density coke when it is heated in a low-oxygen environment. On heating,
66-676: Is the largest production site of coking coal ( metallurgical coal ) in China. Gujiao was part of the State of Jin during the Spring and Autumn period , and part of Zhao in the Warring States period . It was the western part of Jinyang throughout the following dynasties of Han, Wei, Jin and Northern Dynasties. During the Sui and Tang dynasties, the part of Gujiao to the south of Fen River ,
77-402: The coal softens, and volatile components evaporate and escape through pores in the mass. During coking, the material swells and increases in volume. The coking ability of coal is related to its physical properties such as its rank, but laboratory testing is required to completely evaluate the coking ability of a coal. The strength and density of coke are particularly important when it is used in
88-484: The majority part of nowadays Gujiao, was part of Jiaocheng County and the minor part to the north of Fen River was part of Yangqu County . In the year 596 AD in Sui dynasty , the western part of Jinyang was separated to set up the county of Jiaocheng, and the county seat was in Gujiao. In 691 AD, the county seat of Jiaocheng was moved to Dalingzhuang, part of today's Jiaocheng County , in order to get easier access of
99-537: The national roads of Sui dynasty. In 713 AD, the northern part of Jiaocheng County is separated to set up Luchuan County, with the county seat at Luyukou at today's Gujiao. In 714, the Luchuan county was removed, and divided by the Fen River , Gujiao was split between Jiaocheng County and Yangqu County ever after, for more than one thousand years. In 1958, Gujiao industrial and mining district ( 古交工矿区 ) of Taiyuan
110-451: The south. Its east-west width is about 50 kilometers, and north–south length is about 53 kilometers. The total area of Gujiao is about 1551 square kilometres. The population of Gujiao in 1999 stood at 192,458. Its estimated population in 2017 is about 222,000. The economy of Gujiao is largely based on coal-related industries, with major companies in coal, coal-chemistry, electricity, metallic parts casting, construction materials, etc. Gujiao
121-432: Was established. In 1988, the district was replaced with a county-level city, and it has remained so ever since. Gujiao is abundant with many minerals, especially coal. The coal mine is about 754 square kilometres, with the coal reserve of about 8.04 billion tons. The iron core reserve is about 30 million tons. The bauxite reserve is about 65.9 million tons. The limestone reserve is about 5.6 million tons. The dolomite reserve
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