IRON ORE SEPARATION PROCESS IN WASTE FROM IRON ORE EXTRACTION AND BENEFIT

摘要

IRON ORE SEPARATION PROCESS IN WASTE FROM IRON ORE EXTRACTION AND BENEFITING. Refers to an industrial process for obtaining iron ore concentrate, silica and clay from waste from the iron ore extraction and processing process. These concentrates will be obtained by processing the waste in an equipment that will perform the first drying of this (2), which equipment may preferably be a horizontal rotary dryer, but may also be used a filter press, or any other equipment that performs the drying of the product. material. For dry residue, this step is not required. The residue is then loaded into an impact mill (3), preferably hammer-type, but may be used with balls, bars or any other type. The waste is then transported to a first clay separation device (4) which may preferably be a battery of 2 to 30 cyclones, or any other density separation equipment. The clay is then dragged to a bag filter (5) and preferably collected in a silo (6), but can also be collected in bags or deposited at an appropriate location. The residue containing silica ore and some clay is then loaded into a mixer (7) preferably of the horizontal rotary type, but may be used by pallet or any other type. Along with the residue, additives are added to the mixer which may preferably be soap, sawdust, starch, cornmeal, rice powder, ground sugarcane bagasse, or any other flocculant material which will preferably be contained in a silo (8), but may be added through bags or in any other way. After this step the material is routed to the second clay separation system (9), which is preferably a double to wet endless screw system, but any other density separation material may be used. The water containing the clay is then sent to a filter press (10), where more clay is captured and deposited at an appropriate location (11), and the residue containing silica ore and some clay is sent to a new impact mill. , this time the wet one (12), preferably hammer type, but can be used with balls, bars or any other type. The material is then directed to the third clay separation system (13), which is preferably one more double-ended wet end screw system, but any other density separation material may be used. The water containing the clay is then sent to a new filter press (14), and again deposited in its own place (15), and the residue containing ore and silica is sent to a magnetic separator (16), preferably wet and drum. but can be used carousel or any other type. In this step two products are obtained, a concerted ore (17) and a silica concentrate (18). Thus, these materials may return to the productive sector, and iron ore may be used in steel mills for the production of pig iron and silica and clay in construction.