The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 1978
Filed:
Jul. 02, 1976
Nikolai Ivanovich Eremin, Leningrad, SU;
Semen Alexandrovich Tager, Moscow, SU;
Vladimir Nikolaevich Kostin, Moscow, SU;
Lev Nikolaevich Bobkov, Moscow, SU;
Mikhail Ivanovich Zaitsev, Moscow, SU;
Nikolai Andreevich Kaluzhsky, Leningrad, SU;
Nikolai Stepanovich Shmorgunenko, Leningrad, SU;
Abram Zinovievich Jurovsky, Moscow, SU;
Viktor Mikhailovich Kozlov, Leningrad, SU;
Fritiof Meerovich Yakhilevich, Moscow, SU;
Mikhail Yakovlevich Shpirt, Moscow, SU;
Vladlen Iosifovich Panin, Moscow, SU;
Other;
Abstract
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%.