Harga FOB Tongkang
Kcal 63 - 61 Rp. 630
Kcal 58 - 56 Rp. 510
Kcal 55 - 53 Rp. 410
Kcal 53 - 51 Rp. 390
- Harga baru hub kami -
Apakah anda penambang atau penjual ??
Anda mempunyai kartu kredit
Butuh uang tunai - tarik tunai
hubungi kami , gajah mada plza - jakarta
Kota : 0813.1401.3305

Dicari Supervisor - Karyawan TOKO pria - wanita
Tang City dan Taman Palem dan Poris
Telp . 021.9140.9440

LOWONGAN KASIR - WAITER - TUKANG MASAK
WANITA
0817.9108.005
..<< = Steam coal = >>..

Monday, 12 January 2009

The Coal Classification

Intermediate in rank between subbituminous coal and anthracite according to the coal classification used in the United States and Canada.

In Britain bituminous coal is commonly called “steam coal,” and in Germany the term Steinkohle (“rock coal”) is used.

In the United States and Canada bituminous coal is divided into.

The most abundant form of coal, intermediate in rank between subbituminous coal and anthracite according to the coal classification used in the United States and Canada. In Britain bituminous coal is commonly called “steam coal,” and in Germany the term Steinkohle (“rock coal”) is used. In the United States and Canada bituminous coal is divided into high-volatile, medium-volatile, and low-volatile bituminous groups. High-volatile bituminous coal is classified on the basis of its calorific value on a moist, ash-free basis (ranging from 24 to 33 megajoules per kilogram; 10,500 to 14,000 British thermal units per pound), while medium-volatile and low-volatile bituminous coals are classified on the basis of the percentage of fixed carbon present on a dry, ash-free basis (ranging from 69 to 78 percent for medium-volatile and from 78 to 86 percent for low-volatile bituminous coal). Medium-volatile and low-volatile bituminous coals typically have calorific values near 35 megajoules per kilogram (15,000 British thermal units per pound) on a dry, ash-free basis.

Bituminous coal is dark brown to black in colour and commonly banded, or layered. Microscopically, three main groups of macerals (individual organic constituents of coal) can be recognized: vitrinite, liptinite, and inertinite. The glassy material in most bituminous coal is vitrinite, composed of macerals derived primarily from woody plant tissue. Because of its relatively high heat value and low (less than 3 percent) moisture content, its ease of transportation and storage, and its abundance, bituminous coal has the broadest range of commercial uses among the coals. It has long been utilized for steam generation in electric power plants and industrial boiler plants. In addition, bituminous coals that contain a fairly small amount of sulfur and cake (or “agglomerate”) easily are the only coals suited for making metallurgical coke—a hard, spongelike substance of almost pure carbon important for smelting iron ore.

A major problem associated with the burning of bituminous coal is air pollution. Burning bituminous coal with a high sulfur content releases sulfur oxides into the air. Under certain conditions, nitrogen present in coal is also released in the form of nitrogen oxides. When moisture in the atmosphere reacts with these gases, acids such as sulfuric acid are produced and fall to Earth as wet acid deposition (acid rain)—an agent that can damage buildings and crops and cause water pollution. Because of these serious pollution problems, and regulations stemming from the 1990 Clean Air Act, a growing number of coal-fired electric power plants in the United States have either installed cleaning devices to reduce air pollution emissions or switched to low-sulfur subbituminous coal. Some European countries have instituted similar measures, while others, such as France, have largely switched to nuclear power for the generation of their electricity. Many developing countries, such as China, seem to ignore the pollution problem altogether.

0 comments:

Relation

Topic Relation

Send Your Offer To Us

Sell Steam Coal
Order Form / Butuh funder

Mohon maaf
apa bila menawarkan Batu Bara
mohon sertakan
> Summary Tambang
> Company profile ,
> FCO = full corporate offer
> COA , BL

Apa bila ingin meminta penawaran
mohon sertakan
LOI resmi atau Draft kotrak / draft LC

Untuk persyaratan funder :
info clik disini :
Persyaratan Funder Batu Bara

informasi lain ::
Steam Coal Price
Funder Batu Bara
Sell Steam Coal

Atau bisa kirim email
ke rcjakarta@gmail.com
Add to Technorati Favorites Digg!
Marketing Blogs - BlogCatalog Blog Directory
Custom Search

Steam Coal | Industri Dan Niaga