Method for lowering content of magnesium in pentlandite concentrate

A technology of pentlandite and magnesium content, which is applied in the field of mineral separation, can solve the problems of high energy consumption, high MgO content, waste of resources, etc., achieve good separation selectivity, increase specific surface area, and reduce repulsion energy Effect

Active Publication Date: 2014-07-23
NORTHEASTERN UNIV
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nickel sulfide in the ore is mainly recovered by flotation, and there are two main problems in the recovery process: one is the low recovery rate of valuable metals; the other is the high content of MgO in the concentrate
The reason for the high magnesium is that there are a large number of magnesium-rich gangue minerals in the ore, such as serpentine, talc, chlorite, etc. These minerals have good buoyancy and low hardness during the grinding process. It is easy to over-grind, causing these fine gangue particles to easily adhere to the surface of useful minerals to form "heterogeneous agglomeration", and then float together into the concentrate, resulting in a high content of MgO in the concentrate grade. When the MgO content exceeds 6.8 %, the nickel grade will decrease correspondingly, so it is necessa

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for lowering content of magnesium in pentlandite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1

[0033] The actual ore is Jinchuan low-grade pentlandite concentrate, containing 3.25% Ni, 9.49% pentlandite, 8.58% MgO, and 90% with a particle size of <0.075mm.

[0034] A method for reducing magnesium content in pentlandite concentrate, comprising the following steps:

[0035] 1. Disperse pulp

[0036] Add 100g of low-grade pentlandite concentrate to 400mL of water, mix well, pour it into a high-speed shear mixer at a speed of 1500r / min, adjust the pH value of the slurry to 10.5-11.0 with sodium carbonate while stirring; Add 20mg of sodium hexametaphosphate to the mixture, the rotation speed is 1500r / min, shear and stir for 5min, so that the pulp is evenly dispersed;

[0037] 2. Add magnetic seeds and surfactants

[0038] Add 4g of magnetite powder with a particle size of <10μm, 10mg of oleic acid and 10mg of kerosene to the stirred and dispersed pulp; adjust the rotation speed to 1200r / min, and shear and stir for 4min;

[0039] 3. Magnetic separation ...

Example Embodiment

[0051] Example 2

[0052] 1. Disperse pulp

[0053] Mix pentlandite concentrate and serpentine pure minerals according to the mass ratio of 1:1 to obtain artificial mixed ore; add 70g of mixed ore to 200mL of water, mix well, put it into a high-speed shear mixer, and the speed is 2500r / Min, while stirring, use sodium bicarbonate to adjust the pH value of the pulp between 10.0 and 10.5; then add 35 mg of sodium hexametaphosphate to the pulp, at a speed of 2500 r / min, shear and stir for 3 minutes, so that the pulp is evenly dispersed;

[0054] 2. Add magnetic seeds and surfactants

[0055] Add 3.5g of magnetite powder with a particle size of <10μm, 17.5mg of oleic acid and 17.5mg of kerosene to the stirred and dispersed pulp; adjust the speed to 1500r / min, and shear and stir for 6min;

[0056] 3. Magnetic separation

[0057] Pour the ore slurry stirred in step 2 into the feeding cylinder of the XCSQ-50×70 wet strong magnetic machine, and set the background magnetic field str...

Example Embodiment

[0059] Example 3

[0060] 1. Disperse pulp

[0061] Mix pentlandite concentrate and serpentine pure minerals according to the mass ratio of 2:1 to obtain artificial mixed ore; add 100g of mixed ore to 300mL of water, mix well, and put it into a high-speed shear mixer with a speed of 2200r / Min, while stirring, use sodium carbonate to adjust the pH value of the pulp between 9.5 and 10.0; then add 40mg of water glass to the pulp, the speed is 2200r / min, shear and stir for 5min, so that the pulp is evenly dispersed;

[0062] 2. Add magnetic seeds and surfactants

[0063] Add 4g titanomagnetite powder with a particle size of <10μm, 20mg oleic acid and 20mg kerosene to the stirred and dispersed pulp; adjust the rotation speed to 1300r / min, and shear and stir for 5min;

[0064] 3. Magnetic separation

[0065] Pour the ore slurry stirred in step 2 into the feeding cylinder of XCSQ-50×70 wet strong magnetic machine, set the background magnetic field strength to 5.0×10 5 A / m, for m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Login to view more

Abstract

Nickel sulfide in low-grade ores is mainly recycled by a flotation method, but the defect is that the content of MgO in concentrate is high. As magnesium-containing minerals are high in smelting point and poor in mobility, when the content of MgO in concentrate is higher than 6.5%, adverse effects such as furnace body nodulation and furnace body corrosion are brought to a follow-up novel flash smelting process of nickel. In order to solve a problem that the content of magnesium in concentrate is high during separating of magnesium-nickel containing minerals, the invention provides a method for lowering the content of magnesium in pentlandite concentrate. The method comprises the following steps: adding surface conditioning agents such as sodium hexametaphosphate into the pentlandite concentrate, and uniformly dispersing ore pulp by stirring; then, adding magnetic seeds and a surfactant, and stirring to ensure that the magnetic seeds and the pentlandite concentrate generate adhesion agglomeration; and performing magnetic separation, thereby obtaining the pentlandite concentrate with the content of magnesium being lower than 6.5% (in terms of MgO). The method disclosed by the invention has the advantages of being good in pentlandite separation selectivity, environmentally friendly, low in energy consumption, easy to operate, high in efficiency, and the like, and solves a problem that the content of magnesium in nickel concentrate is high.

Description

technical field [0001] The invention belongs to the field of mineral separation, and in particular relates to a method for reducing magnesium content in pentlandite concentrate. Background technique [0002] Nickel is a silver-white metal with magnetism, good plasticity and electrical conductivity. It is not easily corroded and is widely used in the manufacture of various special steels, heat-resistant and corrosion-resistant alloys, hard alloys, etc. It is an important metal related to the national economy and people's livelihood. Nickel exists mainly in the form of nickel sulfide ore, laterite nickel ore and seabed nodules in nature. Among them, nickel sulfide ore is the main source of nickel extraction at present. The typical nickel deposits in my country mainly include Jinchuan nickel mine in Gansu, Panshi nickel mine in Jilin, Kalatongke and Huangshan nickel mines in Xinjiang, and Lengshui cyanide nickel mine in Sichuan. Underground mining, with the continuous developme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B03C1/01B03C1/02
Inventor 袁致涛李丽匣卢冀伟朱烁申帅平
Owner NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap