The following Iron Ore specifiions guide contains the primary specifiions and methodologies for Platts Iron Ore assessments throughout the world. These are the timestamps used for Platts iron ore assessments. Data reported at or after these timestamps is not considered in the assessment process. Asia: Singapore Atlantic: London fineS .
· Ore blocks, high enough in iron grade to meet direct shipping specifiions, are mined selectively by open cut methods, but blocks lower in grade due to contacts with mudstone, or banded iron formation, or lateritic gravel at the edge of the orebodies, or dykes intersecting the ore blocks, are mined as beneficiation plant feed. This material constitutes approximately 60% .
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Pig iron is the product of smelting iron ore (also ilmenite) with a highcarbon fuel and reductant such as coke, usually with limestone as a flux. Charcoal and anthracite are also used as fuel and reductant. Pig iron is produced by smelting or iron ore in blast furnaces or by smelting ilmenite in electric furnaces. Pig iron is supplied in a variety of ingot sizes and weights, ranging from 3 kg ...
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· In addition, molten iron, pig iron, direct reduced iron, hot compact, etc. can be added. Smelting takes a long time, usually at least twice the time of converter smelting. The electric arc furnace has high melting temperature and easy to control and adjust. The arc furnace arc temperature is as high as °C, and the furnace temperature is up to 2000 °C. It .
Scrapbased steel production (also referred to as secondary or recycled production) can be valuable in reducing energy demand and CO2 emissions, as it is considerably less energyintensive than primary production from iron ore. Scrap is used as the main ferrous feed in electric arc furnaces (EAFs), as well as in induction furnaces to a lesser extent. Scrapbased .
· Both rod mills and ball mills are used for this purpose. Capital investment and operation costs of grinding equipment are high. Hence economics play a large part in planning for the degree of crushing and grinding performed to prepare ore for beneficiation. Other factors considered in determining the degree of crushing and grinding includes the value .
Such highspeed operation requires cooling of the rod and almost every rollingmill component. The cooling condition of the bars and rods is also carefully controlled to meet metallurgical specifiions. Computers are used for designing roll passes and for scheduling and controlling the complex operations. Bar and rod mills produce 150,000 to ...
Iron ore materials, fuel (coke) and flux (limestone, burnt lime) are charged into the top of the blast furnace in the required quantity to produce hot metal; while air enriched with oxygen, natural gas, steam, etc, are blown into the bottom. Combustion takes place and the heated burden descends. As a result, hot metal containing % of carbon is produced. The steelmaking process .
Even though equipment is improved and higher production rates can be achieved, the processes inside the blast furnace remain the same. The blast furnace uses coke, iron ore and limestone to produce pig iron. Coal traditionally has been a key part of the cokemaking process. The coal is crushed and ground into a powder and then charged into an oven where it is heated to .
· Wet ball mill has strong adaptability to materials, continuous production, large crushing ratio, easy to adjust the abrasive fineness, high grinding efficiency, low requirements for ore moisture content. In addition, the material transport device of wet ball mill is simple, so the investment of wet ball mill is about 5%10% lower than that of dry ball mill.
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· Ores carrying very high quantities of hematite (greater than ~ 60% iron) are known as "natural ore" or "direct shipping ore," meaning they can be fed directly into the BFBOF route. However, lowgrade ores need to be beneficiated before they can be used to make steel. To meet the size specifiion required for the highgrade DSO products and liberate the gangues .
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