Unlock instant, AI-driven research and patent intelligence for your innovation.

Two-stage roasting treatment method for laterite nickel ore

A technology of lateritic nickel ore and two-stage roasting, which is applied in the direction of improving process efficiency, etc., can solve the problems of unsatisfactory nickel and cobalt leaching rate, inability to effectively separate nickel and iron, and inability to reduce iron leaching, etc., so as to reduce the leaching rate , improve the recovery rate, good separation effect

Active Publication Date: 2013-03-06
广西银亿新材料有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, it is known that the decomposition temperature of iron sulfate is about 450 ℃, and iron sulfate will not decompose during the sulfation treatment of laterite nickel ore at low temperature. Therefore, In the end, the leaching of iron cannot be reduced, nickel and iron cannot be effectively separated, and the leaching rate of nickel and cobalt is not ideal.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of laterite nickel ore produced in Indonesia after crushing and screening, the composition is as follows:

[0025] Particle size: 100~500 mesh 99.1%

[0026] Ni: 1.78%

[0027] CO: 0.08%

[0028] Fe: 20.06%

[0029] Mg: 12.24%

[0030] Mix 1000g of the ore sample with 350mL of concentrated sulfuric acid with a density of 1.83g / ml and mix well (the mass ratio of mineral acid is 1:0.6). Obtain 1406g solid matter after roasting 2 hours, solid matter and 300g pyrite (FeS 2 , containing 47% S) mixed and finely ground (the mass ratio of sulfur in the ore material to the sulfur-containing material, that is, the mass ratio of ore sulfur is 1:0.1), put it into a box-type resistance furnace and roast at 700 ° C for 45 minutes, after cooling Grind the roasted product and transfer it to a beaker, add 4500g of tap water (solid-to-liquid ratio is 1:3, mass ratio), place it in a constant temperature water bath at 90°C and stir for 30 minutes, filter, wash the filter residu...

Embodiment 2

[0032] A kind of laterite nickel ore produced in Indonesia after crushing and screening, the composition is as follows:

[0033] Particle size: 100~325 mesh 90.5%

[0034] Ni: 1.42%

[0035] CO: 0.05%

[0036] Fe: 22.25%

[0037] Mg: 10.33%

[0038] Mix 300g of the ore sample with 60g of concentrated sulfuric acid with a density of 1.84g / ml and mix well (the mass ratio of mineral acid is 1:0.6). After roasting for 1 hour, 320g of solid matter was obtained. Mix the solid matter with 160g of sulfur and grind it finely (the mass ratio of mineral sulfur is 1:0.5), put it into a box-type resistance furnace and roast it at 450°C for 3 hours, and grind the roasted thing finely after cooling. Transfer to a beaker and add 3000g of tap water (solid-to-liquid ratio 1:8, mass ratio), stir and leach for 3 hours at a temperature of 20°C, filter, wash the filter residue with an appropriate amount of water, dry the filter residue and take a sample for analysis. After that, the extraction...

Embodiment 3

[0040] The ore sample is the same as in Example 1. Mix 100g of the ore sample with 83mL of concentrated sulfuric acid with a density of 1.84g / ml and mix well (the mass ratio of mineral acid is 1:1.5). The obtained paste is placed in a glass dish and placed at a constant temperature. In the box, raise the temperature to 150°C and maintain a constant temperature state. After baking for 10 hours, 221g of solid matter is obtained. Mix and grind the solid matter with 188g of analytically pure ferric sulfate (the mass ratio of mineral sulfur is 1:0.2), and put it into the box Roast in a resistance furnace for 2 hours at 750°C, after cooling, grind the roasted product into a beaker, add 1700g of tap water (solid-to-liquid ratio is 1:5, mass ratio), stir and leach for 3 hours at a constant temperature of 60°C, filter , wash the filter residue with an appropriate amount of water, dry the filter residue and take a sample for analysis. After treatment, the extraction rate of nickel by sla...

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

No PUM Login to View More

Abstract

The invention discloses a method for treating laterite nickel ore by two-stage roasting. The method comprises the following steps: (a) mixing the laterite nickel ore with a sufficient amount of concentrated sulfuric acid, and then performing the first Stage roasting treatment; (b) Mix the material obtained in step (a) with sulfur-containing substances, and then conduct the second-stage roasting treatment on the mixture below 450-800°C; (c) Put the material obtained in step (b) through After crushing, it is leached with water, and the leached slurry is separated from solid and liquid, and the nickel-containing solution can be sent for further refining treatment. The method of the present invention treats the laterite nickel ore by means of two-stage roasting, which not only improves the recovery rate of nickel, but also reduces the leaching rate of iron, and in the leaching stage, better separation effect of nickel and iron can be obtained.

Description

technical field [0001] The invention relates to a treatment method of nickel-containing ore, more specifically a method for treating laterite nickel ore by two-stage roasting. Background technique [0002] Lateritic nickel ore is mainly divided into three mineral components with mining value: the limonite layer on the surface, the saprolite layer above the bedrock, and the transition layer between limonite and saprolite. The nickel-containing minerals in limonite are goethite and / or hematite; the nickel-containing minerals in saprolite are mainly minerals with high silicon and magnesium content, such as serpentine, magnesite, chlorite, Nontronite and montmorillonite etc. The ore in the transition zone contains both limonite and saprolite. [0003] Industrially, there are two types of processes for processing laterite nickel ore, pyromethod and wet method. [0004] The pyrotechnic process is that the ore is dried and subjected to high-temperature reduction roasting, and th...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B1/06C22B3/04C22B23/00
CPCY02P10/20
Inventor 余小宁王多冬和润秀王春轶朱新宇施贵添容仕甲
Owner 广西银亿新材料有限公司