A qisqacha tarix of temir ta'minot

U erda faqat uch ferrous metallar: temir, marganets va xrom bor. In the survey of land resources and geological and mineral exploration, 157 large katta va o'rta mineral maydonlar yangi kashf qilingan, shu jumladan 4 ferrous metall minerallar, 73 zanglamaydigan metall minerallar va 34 qimmatbaho metall konlari.

In 2004, the investment in ferrous metal mining, eritish va rolling ishlov berish sanoati 154,6 mlrd yuan%ni tashkil etdi 2c an o'sish 40,5%. In 2005, o'sish tezligi the ferrous metall sanoati tezlashtirilgan tezlashtirilgan sezilarli% 2c va qo'shilgan qiymat 35,5% ga oshdi. Cho'chqa temirining chiqishi 2c xom po'lat va po'lat bo'ldi 27,7 million tonna, 29,73 million tonna va 31,106 million tonna, ni tashkil etadi.

2004 yilda dunyoda po'lat ishlab chiqarish 1,054,8 million tonna, ga o'sdi haqida oshdi haqida ma'lumot 110 million tonna, of xitoy's po'lat ishlab chiqarish oshdi 52,34 million tonna, hisobga olish uchun 47,73% of the the world steel production growth. In 2004, China's steel production reach 2 72 million tonna, has birinchi o'rinni egallagan dunyo uchun to'qqiz ketma-ket yil davomida, va bo'lgan birlashtirilgan po'lat ishlab chiqarish 1 yilYaponiya, the United States and Russia, ranking second to fourth. China is already 27s eng katta steel production and consumer, and become the most concentrated area of steel investment.

Temir — metall lardan biri ma'lum qadimgi davrlardan. Temir rudasi bir bo'lib asosiy komponentlar ning the Earth's qobig'i, temir keng tarqalgan in tabiatda 2c lekin odam kashfiyoti va foydalanish temirdan foydalanish uchun temir is ning keyinchalik oltin va mis. Birinchi of hammasi, chunki temir ning tabiiy elemental holati juda kam uchraydigan on on the Earth, va u oson oksidlanish va zang, plus uning eritish nuqtasi ( 1812K) is is ancha yuqori mis (1356K), yasash uni ko'proq qiyin eritish uchun misdan ko'ra. Odamlar tomonidan topilgan eng qadimgi temir ning 1 ga osmondan 2c va temir ning foizi dan yiqilgan 1 1 ga teng bo'ladi the meteorit juda yuqori, va u a aralashma temir va nikel, cobalt va boshqa metallar. qachon eritish temir ruda ning usuli yo'q hali chiq 2c va u mumkin emas odam uchun mumkin emas odam uchunto obtain cho'chqa temir in katta miqdor, temir bo'ldi sir bilan eng qimmatbaho metall .

 

% e2% 96�Properties of iron

It's a shiny, silvery-white metal. Density 7.86 g/cm 3. Melting point 1535 degree , boiling point 2750 degree . Common valence +2 and +3, with good ductility and thermal conductivity. It also conducts electricity. Pure iron can be both magnetized and demagnetized, and both are very rapid. The ionization energy is 7.870 electron volts. The chemical properties are relatively active, and it is a good reducing agent. If there are impurities, easy to rust in the humid air; Rust is faster in wet air in the presence of acid gas or halogen vapors. Soluble in dilute acid. It can be passivated in concentrated nitric acid. When heated, it can be combined with halogen, sulfur, silicon, carbon, phosphorus, etc. In addition to the formation of +2 and +3 valence oxides, there is also the formation of complex oxides Fe3O4(which is a magnetic oxide). Iron is an indispensable metal in the industrial sector.

 

 

 

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