| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention refers to metallurgy of rare metals, particularly to methods of processing of hard uncovered concentrates specifically to leucoxenic concentrates produced at dressing of oil bearing siliceous titanium ores of Yaregsky deposit and used for further production of artificial rutile. The method includes sintering of float concentrate at presence of additives, cooling, crumbling and dressing by way of separation of titanium oxide grains from silicates either by physic-chemical and/or mechanical methods. Prior to sintering oil titanium leucoxenic float concentrate is mixed with fuel sorption active additives for their saturation with oil from float concentrate. Sintering is performed by means of filtration burning under the mode of superadiabatic heating in a shaft type reactor. At that oil titanium float concentrate is charged into the reactor from the top together with inert additives, while from the bottom oxygen containing gas-oxidiser is supplied into the reactor by counterflow. Float concentrate is being charged at its successive flow through the heating and drying zones, through pyrolysis zone, burning and cooling zones and is discharged; while oxygen containing gas-oxidiser is supplied during the flow through these zones at inverted sequence; this gas takes part in the processes of burning and interacts with components of the concentrate producing at the final stage gas-product which consists of water steam released during drying and products of oil burning. As inert additives, recycled hard modifying additives in kind of refractory materials are used. The temperature of sintering in the burning zone is maintained within the range of 900-1300C by means of regulating mass fractions of burning and non-burning materials charged into the reactor and oxygen supplied with gas-oxidiser. ^ EFFECT: upgraded chemical activity (treatability) of concentrate, increased contents of rutile phase in concentrate, increased profitability of the process. ^ 4 cl, 1 dwg, 1 tbl |
