US 10,370,271 B2 · Column thickener and a process thereof for dewatering of iron ore slurry

Abstract

The present invention is related to a high aspect ratio column thickener and a process thereof useful for dewatering of iron ore tailings. The column thickener has been developed with multiple feed inlet points and an auxiliary inlet point for water to clear the jam of high concentration slurry, if required. The column also consists of a conical portion at the bottom. Magnetic field has been applied using induced magnetic coil just above the conical portion of column thickener. Iron ore tailings slurry is fed into the column thickener and particles are allowed to settle in axial direction with and without the application of magnetic field.

Claims8

Dependent claims

A column thickener for dewatering of iron ore tailings slurry comprising:

a) a tall column with large aspect ratio at the top made up of a non-magnetic material, comprising an outlet for clarified water, feed slurry inlet, a provision for multiple feed inlets, and a bubble cap arrangement;
b) a metallic section made up of a metallic material comprising a matrix;
and
c) a conical discharge system having a conical bottom containing an auxiliary inlet, a discharge valve for taking out underflow slurry, and a high concentration slurry at the bottom portion of the system.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/552,641Filed 23 Feb 2016

Priority

IN 503/DEL/201523 Feb 2015

Published

US 2018/0037481 A18 Feb 2018

Granted

6 Aug 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C02F 1/488
With magnetic or electric fields: for separation of magnetic materials, e.g. magnetic flocculation
B03C 1/01
Pretreatment specially adapted for magnetic separation: by addition of magnetic adjuvants
B03C 1/032
Component parts; Auxiliary operations: matrix cleaning systems
B03C 1/0335
Characterised by the magnetic circuit: using coils

Column thickener and a process thereof for dewatering of iron ore slurry

Life of this patent

Column thickener and a process thereof for dewatering of iron ore slurry

Life of this patent

Abstract

Claims8