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Method for Improving Rheological Properties of Mineral Slurry

a technology of mineral slurry and rheological properties, which is applied in the direction of silicon compounds, grain treatment, silicates, etc., can solve the problems of reducing the yield and operation efficiency, the difficulty of separation of nickel minerals from serpentinite-containing gangue, and the cost of nickel recovery losses, so as to reduce the viscosity of the slurry and increase the flotation performance

Inactive Publication Date: 2013-12-19
MOORE LUCAS R +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent text states that adding a small amount of a dispersant to a mineral slurry can decrease its viscosity and improve the performance of flotation, a process used to separate minerals.

Problems solved by technology

Separation of nickel minerals from serpentinite-containing gangue is challenging.
Because of lack of good separation from gangue the plants are forced to operate flotation process based on quality of the concentrate with the cost of nickel recovery losses.
This significantly decreases the yield and the economy of the operations.
Problem with the serpentine is that it contains Mg which is problematic element in nickel smelters.

Method used

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  • Method for Improving Rheological Properties of Mineral Slurry
  • Method for Improving Rheological Properties of Mineral Slurry
  • Method for Improving Rheological Properties of Mineral Slurry

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Experimental program
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[0043]The test program consisted of viscosity measurements and flotation tests. Hitura serpentinite sample (Ni 0.73%) was the main test material of the study. Totally nine dispersive reagents were selected for the rheological studies and flotation tests were done using four the most effective reagents (A, F, I and L).

[0044]Viscosity measurements were done with Brookfield viscometer RVDV-I. Temperature was recorded, but not controlled. Temperature varied between 21-23t. Viscosity was measured with two spindle speed (50 rpm and 100 rpm) according to internal laboratory method used for mineral pastes i.e. coating pastes having solid content up to 60-65 w-%. Slurry volume in measurements was constant 250 ml. Slurry preparation was done with DIAF 20VH mixer.

[0045]Milled ore and ion-exchanged water was mixed for 10 min before addition of dispersant. After the dosage slurry was mixed for 5 min before viscosity measurement.

[0046]The dispersants tested were the following:

[0047]A—AA / AMPS

[0048...

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Abstract

A method for improving the rheological properties of mineral slurry comprising adding a copolymeric dispersing agent to the slurry to disperse silicate minerals. Also disclosed is a method for flotating mineral slurry.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to a method for improving rheological properties of mineral slurry. More particularly the present invention relates to a method wherein a copolymeric dispersing agent is added to the slurry to disperse silicate minerals. The present invention relates to a flotation method[0002]Flotation is a process where mineral slurry produced from pulverized ore is mixed with foam forming organic chemicals and with the aid of air foam is formed to mineral slurry. Collector chemicals bound the valuable metal concentrate to the surface of the foam bubbles. Mineral concentrate foam is collected from the surface of the flotation cell.[0003]Froth flotation commences by comminution, which is used to increase the surface area of the ore for subsequent processing and break the rocks into the desired mineral and gangue in a process known as liberation, which then has to be separated from the desired mineral. The ore is ground into a fine powde...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08K3/34C09K23/52
CPCC08K3/34B03D1/008B03D1/012B03D1/014B03D2201/005B03D2203/04B03D2203/02B03D1/016B02C23/08
Inventor MOORE, LUCAS R.MARTIKAINEN, MIKA
Owner MOORE LUCAS R
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