Engineering & Technologies 4 (2015 8) 430-435 ~ ~ ~ УДК 669.71 Method of Hydrochemical Benefi cation of Bauxite Almaz T. Ibragimov, Sergey V. Budon, Alexander P. Markov*, Mikhail V. Fatyushin, Maxim N. Pechenkin and Vitaliy V. Kaulin «Aluminium of Kazakhstan» JSC Pavlodar, 140013, Kazakhstan Received 10.02.2015, received in revised form 29.03.2015, accepted 03.05.2015 A method of hydrochemical benefi ciation of high-ferriferous, high- carbonated bauxites by processing of raw bauxite with solution of complexon in the medium of hydroxide under pressure has been developed. <...> Bauxite products are enriched and the liquid phase, containing the extracted from bauxite, iron oxide. <...> Therefore, bauxite is processed by any standard processing method. <...> Processing of liquid phase provides getting of hematite concentrate and mother liquor of complexon. <...> The mother liquor of complexon after regeneration returns to benefi ciation of raw materials as the spent liquor. <...> Hematite concentrate is used to produce iron-ore pellets. <...> Продуктами являются обогащенный боксит и жидкая фаза, содержащая в себе извлеченный из боксита оксид железа. <...> All rights reserved * Corresponding author E-mail address: paz@aok.enrc.com # 430 # Almaz T. Ibragimov, Sergey V. Budon… Method of Hydrochemical Benefi cation of Bauxite обогащение исходного сырья в качестве оборотного. <...> Гематитовый концентрат используется в производстве железорудных окатышей. <...> Therefore, the problem of bauxite benefi ciation is becoming pressing. <...> High content of carbonates and iron compounds in the Krasnooktyabrskiy bauxite at the time of lixiviation leads to decaustifi cation of process solutions and formation of large amount of recycle soda. <...> In order to transform carbonate alkali into caustic one in the process of alumina production through Bayer sintering it is necessary to remove it from the Bayer cycle and implement the process of caustifi cation. <...> Alkali losses compensates by addition of fresh soda ash in suffi cient quantity at the sintering stage. <...> Therefore, decrease of bauxite quality leads to increase of losses of Nа2 О, Al2 dump mud. <...> Content of Na2 O in sintering burden material is limited by molar ration between Na2 O and Al2 O3 with dump mud. <...> In case of higher alkaline module of burden material the sintering fusibility <...>