Magyar Aluminiumipari Troszt

Femipari Kutato Intezet

Almasfuzitoi Timfoldgyar

Other

Aluterv Aluminiumipari Tervezo Vallalat

Rudarski Institut

Aluminiumipari Tervezo Vallalat

Karoly Solymar

Zsolt Csillag

Gyula Horvath

Tibor Kalman

Geza Szentgyorgyi

Istvan Voros

Janos Zambo

Jozsef Zoldi

Jozsef Matyasi

Laszlo Lengyel

Peter Siklosi

Tibor Ferenczi

Bela Toth

Jozsef Boros

Pal Toth

Tihamer Pinter

Kalman Wentzely

Laszlo Zsemberi

Ferenc Sitkei

Ferenc Vallo

Tibor Legat

Janos Steiner

Maria Orban Nee Kelemen

Ivan Feher

Sandor Czafit

Ferenc Lazar

Gyorgy Sigmond

Bela Lajtai

Ferenc Orban

Janos Morzal

Gabor Molnar

Balint Szabo

Laszlo Zsembery

Gyorgy Kaptay

Zoltan Osvald

Zoltan Ozvald

Marika Orban Nee Kelemen

Lajos Orban

Gyorgy Zsigmond

Ferenc Rosenmann

Vilmos Stefaniay

Maria Orban

Ljiljana Jankovic

Miomir Ceh

Lajos Toth

Predrag Bulatovic

Gyorgy Baksa

Slavoljub Bratuljevic

Balazs Ihasz

Matyas Rainiss

Zoltan Pais

Zoltan Felfoldi

Pal Bognar

Gyula Ibranyi

Gyorgy Dobos

Peter Jakos

Eva Hidvegy

Gyorgy Keebe

Pai Toth

Ferenc Rosemann

Tibbr Kalman

Erno Bujdoso

Apparatus for the classification or separation of solid materials

The present invention relates to a priming or body paint having active anti-corrosive and surface cleaning effect containing binding material, pigment and optionally solvent, filler and/or additives, characterized in that said pigment, optionally in addition to other known pigments, comprises:

Priming and body paint having an active anti-corrosive and surface

Air-jet mill and associated pregrinding apparatus for comminuating solid

According to the process the grains are led to the surface or ducts of a rotary element farther in than the flange of the rotary element, thus the coarse grains are led to the flange of the rotary element in a counterflow to the sizing medium. In a housing on an impeller deflecting elements are arranged, the carrier medium and the mixture of material to be sized are fed into the housing by medium inlet tubes, and led out by coarse and fine fraction outlet tubes or nozzles, and one inlet disc is arranged above the impeller so that they form an annular assorting space which is divided by deflecting elements into segments, and a passage connected to the inlet tube of the sizing medium is formed between the mantle of the inlet disc and the inner wall of the housing at its upper end, where ducts leading into the assorting space are arranged in the inlet disc farther in than its flange, and which are connected to the carrier medium inlet tube.

Method and apparatus for sizing grains smaller than 300.mu.

The invention relates to a process for the reduction of sodium hydroxide losses of the Bayer-cycle by modified causticization of red mud which comprises

Process for the reduction of the sodium hydroxide losses of the

An improved process for accelerating the digestion process in the Bayer alumina process is provided which promotes both the goethite-hematite conversion and a more perfect and quick dissolution of the diaspore. The above is achieved by carrying out the digestion in the process of 5-20% by weight calculated on the dry weight of the bauxite of a novel hydrogarnet catalyst.

Process for accelerating the digestion and sedimentation steps on the

The invention relates to an improved process for the production of alumina according to the Bayer technology, of bauxites containing goethite and especially of boehmitic or diasporic bauxites, for the acceleration of the digestion process, for the transformation of goethite into hematite, for the increase of alumina yield and for the reduction of the caustic soda losses, the essence of which consists in carrying out the digestion in the presence of 2-6% CaO and 0.2-2.0% Mg.sup.++, Fe.sup.++, Mn.sup.++ Co.sup.++ ions based on the weight of the dry bauxite or of compounds or ores containing these ions in the indicated quantities.

Process for digesting goethite-containing bauxites according to the

The present invention provides for an improvement in the Bayer Aluminum manufacturing process wherein the digestion of goethite-containing bauxite is effected in higher yields, at lower temperatures and in a single step by carrying out said digestion in a wet caustic solution containing both calcium oxide and sodium chloride.

Process for the digestion of goethite-containing bauxites

An improved process for the enrichment of bauxites with unfavorable textures and low qualities via flotation and carried out after selective agglomeration. According to the process of the invention a water-soluble prepolymer of low chain length is added to the slurry as flocculating agent, thereafter the polymerization is started again by heating the slurry and/or adjusting its pH and/or adding a catalyst thus converting the polymer chain fragments adhered onto the gangue with high surface activity into a cross-linked resin, and finally the slurry is subjected to flotation in the presence of a conventional flotation aid.

Flotation process for the enrichment of bauxites

Disclosed is a method for the treatment of the red mud byproduct of the Bayer aluminum process, wherein limestone, hydrated lime or other CaO-containing material is added to the red mud in certain molar proportions to the ingredients of the red mud, then the mixture is further mixed with a reducing agent, and the entire mixture is subjected to a reducing heat treatment during the course of which the mix becomes softened or molten. The iron and the slag are separated from each other while the mix is still molten, or after it has been cooled, and then the Na and Al-content of the slag is extracted with a sodium carbonate solution containing a caustic, or with a sodium carbonate solution and a solution of a caustic in two steps.

Method for the treatment of red mud

A method for processing bauxites according to the Bayer technology, with an increased yield in Al.sub.2 O.sub.3 and with decreased caustic soda losses, starting particularly from goethite bauxites of boehmite and/or diaspore type and carrying out the digestion at 180.degree.C to 300.degree.C using an aluminate liquor containing Na.sub.2 O.sub.caustic in a concentration of 80 to 300 g./l. The digestion is carried out in the presence of a calcium compound in an amount corresponding to 2 to 6 % of CaO calculated for the dry weight of bauxite and of a sulfate salt in an amount corresponding to 1.0 to 7.0 g./l. of sulfate ion concentration, whereby the goethite content of the bauxite is converted into hematite. The process provides advantageous conditions for the complete dissolution of the boehmite and diaspore content of bauxite in the vicinity of the equilibrium molar ratio, and enables to recover efficiently the caustic soda losses in the Bayer process itself, requiring no supplementary operation.

Method for processing bauxites

Growing community of inventors

Budapest, Hungary

Karoly Solymar