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Mikhail Yakovlevich Shpirt

Nikolai A Kaluzhsky

Nikolai S Shmorgunenko

Nikolai Ivanovich Eremin

Vladimir Nikolaevich Kostin

Mikhail Ivanovich Zaitsev

Semen Alexandrovich Tager

Fritiof Meerovich Yakhilevich

Lev Nikolaevich Bobkov

Vladlen Iosifovich Panin

Viktor Mikhailovich Kozlov

Abram Zinovievich Jurovsky

The invention relates to a process for the production of alumina from mineral component of solid fuels containing aluminum, silicon and iron oxides. The process comprises burning a mixture of a solid fuel with limestone in the following molar ratios of limestone to said oxides: CaO:SiO.sub.2 =2.0, CaO:Al.sub.2 O.sub.3 =1.3-1.8, CaO:Fe.sub.2 O.sub.3 =1.0, at 1700.degree.-1900.degree. C. As a result, a melt is obtained containing calcium compounds: 2CaO.SiO.sub.2, 12CaO.7Al.sub.2 O.sub.3, CaO.Al.sub.2 O.sub.3, CaO.Fe.sub.2 O.sub.3. The melt is cooled and leached with soda solutions for extracting alumina. The sludge remaining after the leaching is suitable for Portland cement production. The invention enables a considerable enlargement of the range of starting products for aluminum and cement industries due to the use of the mineral component of solid fuels, an about twofold reduction of capital investments in the alumina production and reduction of the fuel consumption by 30-40%.

Process for the production of alumina from the mineral component of

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Moscow, Russia

Mikhail Yakovlevich Shpirt