Production of Synthetic Carnallite from The Wastes of Titanium and Magnesium Production with The Extraction of Niobium- Containing Middlings

World Multidisciplinary Earth Sciences Symposium 2016

Ultarakova, Almagul^1 ; Naimanbayev, Madali^1 ; Murat, Onayev^1 ; Nadira, Alzhanbaeva^1 ; Botakoz, Barkytova^1

Joint Stock Company Centre of Earth Sciences, Metallurgy and Ore Benefication, Shevchenco Str. 29/133, crn. of Valikhanov Str., Almaty

050010, Kazakhstan^1

关键词: Chloride wastes;    Chlorination process;    Extraction technology;    Impurity components;    Magnesium chlorides;    Magnesium production;    Titanium production;    Valuable component;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/44/3/032001/pdf
DOI  :  10.1088/1755-1315/44/3/032001

来源: IOP

【 摘 要 】

Analysis of the current state of the titanium and magnesium production in the Republic of Kazakhstan shows the availability of significant amounts of chloride wastes containing valuable components. Magnesium and potassium with an average content of 5060% potassium chlorides, 25-30% magnesium chlorides are lost among other metals in the wastes of the titanium and magnesium production. Kazakhstan has not mastered the field of magnesium raw materials, so it has to import it in the form of carnallite. Ust-Kamenogorsk Titanium Magnesium Plant JSC (UTMK) currently imports carnallite that is a KCl-MgCl2x6H2O binary salt at quite high prices. In this regard, the task of extracting these metals from chloride wastes is relevant. Chloride wastes of titanium production, sublimates of dust chambers of a titanium chlorinator, sludge of a carnallite chlorinator has been chosen as the targets of our research. The analysis of niobium distribution within any solid waste of a titanium sludge chlorination process in UTMK JSC showed that the highest content of niobium is in the sublimates of dust chambers of a titanium chlorinator in the ranges from 0.26 to 1.0%. Among the niobium extraction technologies considered, the known method of its extraction from the chloride waste is leaching with weak solutions of mineral acids or bases in order to convert the chloride salts into the solution to be used for synthetic carnallite extraction. Besides niobium, other impurity components are transferred to the cake and shall be separated from the base metals. The effective method for this is the chlorination process enabling niobium transfer into the sublimates in the form of chlorides and thus separating it from the majority of the impurities. The condensed niobium chlorides are hydrolysed transferring it into sediments in the form of oxide. The paper shows the way of the synthetic carnallite production suitable for use in the main flow diagram of titanium and magnesium production with a by-product in the form of middlings enriched with niobium.