FIELD: chemistry.
SUBSTANCE: invention relates to inorganic chemistry and can be used for producing magnesium oxide from talc-magnesite ore and talc tailings from talc-magnesite ore. The method of producing magnesium oxide involves decarbonisation of MgCO3 contained in the raw material by burning at temperature ranging from 750 to 900°C. The obtained magnesium oxide is converted to water soluble magnesium hydroxide through carbonisation at high pressure. Magnesium hydroxide-carbonate is precipitated from the solution while heating, separated and then washed at temperature ranging from 900 to 1100°C to obtain pure magnesium oxide.
EFFECT: invention allows for obtaining pure magnesium oxide from talc-magnesite ore and talc tailings from talc-magnesite ore.
1 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREPARATION TO PROCESSING OF SIDERITIC IRON ORE (VERSIONS) AND METHOD OF ITS FOLLOWING WASTE-FREE PROCESSING | 2011 |
|
RU2562016C1 |
| METHOD FOR UTILIZATION OF TALCUM MAGNESITE SLUDGE WASTE | 2003 |
|
RU2245862C1 |
| METHOD OF PROCESSING MAGNESIUM-CONTAINING MATERIALS | 2007 |
|
RU2369559C2 |
| METHOD OF MAGNESIUM OXIDE PRODUCING | 2001 |
|
RU2198842C2 |
| METHOD FOR SELECTIVE EXTRACTION OF METALS FROM COMPLEX ORES | 2011 |
|
RU2460813C1 |
| METHOD OF PROCESSING MAGNESITE DOLOMITE RAW MATERIAL | 2012 |
|
RU2521543C2 |
| METHOD OF PRODUCING HIGH-MAGNESIA MODIFYING FLUX FOR STEEL-SMELTING SLAG | 2018 |
|
RU2739494C2 |
| METHOD OF MANGANESE ORE PROCESSING | 2013 |
|
RU2539813C1 |
| METHOD FOR TREATING SILICATE MINERAL | 2013 |
|
RU2654983C2 |
| METHOD OF PRODUCING ULTRAFINE CARBONATE POWDERS | 2006 |
|
RU2374176C2 |
