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Ferro Alloys made by iron with one or more elements such as manganese (Mn), aluminum (Al) or silicon (Si) chromium (Cr) are called ferroalloys.
Ferroalloys are used in steel and alloy production. When ferroalloys are mixed with cast iron and steel, they add different properties to the products and change their qualities. For this reason, ditches are used in the iron and steel industry. The world's leading ferroalloy producing countries are South Africa, Ukraine, China and Russia.
Correction of steel quality using ferroalloys improves mechanical performance. Correction in steel quality will also increase the resistance to temperature changes. Thus, it is possible to obtain steel mixtures with high mechanical performance and heat resistance by using ferroalloys.
Ferro Alloys Raw Materials
Ferroalloys are formed by mixing a specific group of elements and a saturated ore. Enriched ore is used to obtain ferrosilicon and ferrochromium. In order to obtain ferrotitanium and ferrotungsten, the result is obtained by concentrating the raw material. The reduction of metal oxides in the compounds is a technology requiring process.
In processes with ferroalloys, the catalysts of the reaction are iron and oxides. The restored element takes some conditions to create a stable form. The element also takes its absence for reverse oxidation. In these stages, the electrothermal method that produces ferroalloys is used in the metallurgy industry.
Chromium is chiefly obtained from the mineral chromite. Basic Chromium mines located in South Africa, Kazakhstan, India, Albania, and Turkey. South Africa is the largest producer of chromium with amounting to 17 million metric tons annual capacity.
Chromite concentrate, when combined with a reductant such as coal or coke and a high-temperature furnace can produce ferrochrome. Ferrochrome is a type of ferroalloy that is an alloy in between chromium and iron.
Chromium allows for the stainless steel to be much harder and tougher. In addition, it prevents corrosion on iron and steel surfaces due to high temperatures. Shredded chromite ore is used to produce stainless steel.
Earlier this month, the International Energy Agency predicted the effects of the COVID-19 virus would see thermal coal demand decline worldwide by 8%, the biggest drop since the Second World War.
Seaborne thermal coal prices this year have also fallen by about 20%, again due to declining demand as factories and offices stayed closed, meaning a substantial reduction in power demand.
Coal is a fossil fuel consisting mainly of carbon, which has been used as the primary energy source for more than a century. it is widely used across a number of industries.
Contrary to popular belief, Coal is still the world’s fastest-growing energy source. Compared to other energy sources such as gas, oil, nuclear energy, using coal as an energy source is still much more affordable. The global coal industry is feed from the world’s biggest mines, which mainly consist of fossil fuel.
Mining is also a sector that provides significant employment, offers safer mining opportunities with modern technology. There are four main mining methods: underground, open surface (pit), placer, and in-situ mining.
Coal is the most common and longest used fossil energy fuel. Coal, oil and natural gas will still exist when depleted, and coal prices are stable compared to other energy sources. Coal is a safe and reliable product because of its ease of transportation, ease of storage and long life. It is also easy to process and deliver coal to users. With such properties, coal is an indispensable source of energy.
World oil reserves will run out in 40 years, according to estimates. Natural gas reserves will be exhausted after 60 years. Estimates for coal reserves are around 200 years. It has been the fastest-growing energy source worldwide in the 21st century and also it will be the long-term efficient energy product in the near future.
Coal is a fossil fuel. Its main components are; carbon, hydrogen, and oxygen. Steam coal is also known as thermal coal. It’s mostly used in electricity generation.
Thermal Coal products in South Africa
South Africa is the 6th biggest coal exporter country with 6,23 billion USD export value. 1/4 of South African coal is exported to energy providers and metallurgical plants in mostly Europe, South America, and India.
Coal is highly used as energy source in South Africa, almost 90% of South Africa electricity being obtained from coal-fired power stations.
Supporters of environmentalist products compare wind and solar power and electricity generation capacity and storage issues with the cost of natural gas production and the security risks posed by nuclear power plants. The result is clear, coal will remain an economic and reliable source of energy for the next 50 years.
It is no coincidence that South African coal is used in the energy sector and especially in electricity generation. South Africa's RB1 and RB3 type coals offer high-calorific value and high energy efficiency. Other features that make South African coal advantageous are its ability to burn easily and fast, soft and brittle.
Analysing and specification of Coal
The type and basic properties of coal are determined by the properties measured in 8 main titles. Such as: "gross calorific value", "total moisture", "volatile matter", ash, "total sulphur" and so on.
The specification for thermal coal is defined in terms of its typical quality. Coal trading companies request additional analyses and test records on milling, ash composition, and ash fusion temperatures as a standard procedure.
SOUTH AFRICAN COAL SPECIFICATIONS - RB1, RB3, RB4/4800