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USA Thermal reduction process for production of ...


The Pidgeon Process, described in Pat. No. 2,330,143, is a wellknown solid state reaction process for the production of magnesium. In carrying out this process, a magnesium oxide ore, such as calcined dolomite, and ferrosilicon are formed into briquettes and charged to a gasfired or electrically heated retort having a reaction zone and a watercooled condensation zone.

Glossary Alliance Magnesium


It is a silicothermic process that relies on the use of ferrosilicon to reduce magnesium oxide to a molten slag at temperatures of between 1,200°C and 1,600°C. This process was developed in the 1940s in Ontario, Canada, by Prof. Pidgeon and the Timminco Company.

Fluoride emissions from Pidgeon process for magnesium ...


Primary magnesium is nowadays produced in China via Pidgeon process. An important reaction in the process is silicothermic reduction of MgO from dolime near 1200ºC under pressure of 210 Pa to generate Mg vapor. Fluorite, ranging 23% (mass fraction), is usually mixed with the raw materials to catalyze the reaction.

Next Generation Sustainable Magnesium Primary Production


Jul 15, 2016· For the magnesium supply value chain, the concept of "Sustainability for Business and Production" can be used, and is described as follows: Product: Safe and ecologically sound throughout its life cycle; Process: Wastes and ecologically incompatible byproducts are .

CNA Process for smelting magnesium by microwave ...


The invention discloses a magnesium reduction process through a microwave heating silicothermic method; the process comprises the following steps: 1. dolomite calcinations: the dolomite is heated to 1100 DEG C to 1200 DEG C and becomes calcined dolomite; 2. the calcined dolomite, silicon nitride powder and fluorite powder are weighed, mixed, milled and then pressed into a ball which meets .

pidgeon process for extraction of metals


pidgeon process on magnesium extraction show the crush machine, dolomite, rocks, 6th ed, society for mining, metallurgy, and exploration, 1994, pp furnaces and auxiliary equipment used to produce iron and steel in this process, magnesium is precipitated from seawater.

Dusting control of magnesium slag produced by Pidgeon ...


Jun 18, 2013· Magnesium production by Pidgeon process has been developed very fast in China since 1990's. The waste slag from magnesium production has attracted broad attention because the huge amounts of the slag. For each ton of magnesium produced, there will be 68 tons of the slag generated. A big part of the Mg slag exists as fine dust with particle size of D95 <, which may pollute air, soil ...

International Journal of Heat and Mass Transfer


sium production and exporting country. The Pidgeon process has advantages of producing high purity magnesium as well as simple operation and low investment cost. It is also anticipated to be the main technique for producing high purity magnesium in future. However, the Pidgeon process in china is of intensive energy use and intensive labor ...

Production, Manufacturing and Extraction of


Introduction. Electroplating is a process that uses electrical current to reduce dissolved metal cations so that they form a coherent metal coating on an electrode. Electroplating is both an art and science.

Life cycle assessment of primary magnesium production ...


China, is an important material for magnesium production using the Pidgeon process. Typical usage of the material could be – tons of ferrosilicon per ton of magnesium. In China, ferrosilicon is produced using iron oxide and silica as raw materials and coke as reduction agent with an energyintensive electric arc furnace that may use

A Comparison of the Greenhouse Impacts of Magnesium ...


Abstract. The impact of the magnesium ingots produced in China using the Pidgeon process is ∼ 42 kg C02eq/kg Mg ingot. This value is based on the current usage of sulphur powder for blanketing molten magnesium while casting. The values of GHG impact for the two systems are discussed in light of energy consumption and process contributions.

Whole Set Dolomite Magnesium Production ...


Design capacity of magnesium line: 5,00025,000 tons per year. Professional Process Design Engineers, Equipment Engineers, Electrical Engineers. Leading supplier of magnesium production line, and we take up over 90% of the market share.

International Journal of Heat and Mass Transfer


sium production and exporting country. The Pidgeon process has advantages of producing high purity magnesium as well as simple operation and low investment cost. It is also anticipated to be the main technique for producing high purity magnesium in future. However, the Pidgeon process in china is of intensive energy use and intensive labor ...

Pidgeon magnesium process Traduction française – Linguee


The fact that magnesium is added during the production process of a casting [...] made of ductile cast iron changes the graphite structure from flake/lamellar to spheroidal and gives it different mechanical properties such as a certain deformability under compressive stress.

USA Thermal reduction process for production of ...


The Pidgeon Process, described in Pat. No. 2,330,143, is a wellknown solid state reaction process for the production of magnesium. In carrying out this process, a magnesium oxide ore, such as calcined dolomite, and ferrosilicon are formed into briquettes and charged to a gasfired or electrically heated retort having a reaction zone and a ...

NUMERICAL SIMULATION OF MAGNESIUM PRODUCTION BY .


The magnesium reduction process occurring in a retort as described in Part I is carried out in a refractory coalfired furnace. It is considered that the thermalflow inside the furnace has an important effect on the heat transfer and reduction of the reactive compound in the retort.