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

Low nickel matte high-temperature oxygen pressure water leaching process

A nickel matte and high temperature technology, applied in the field of low nickel matte high temperature oxygen pressure water leaching process, can solve the problems of easy oxidation of cobalt into slag, decrease of metal leaching rate, low cobalt recovery rate, etc., so as to facilitate production efficiency and improve recovery rate, the effect of low Fe content

Inactive Publication Date: 2011-08-17
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention proposes a low-matte nickel-matte high-temperature oxygen pressure water immersion process. The present invention solves the problem that cobalt is easily oxidized and enters the slag in the process of blowing low-matte nickel by fire in the prior art, resulting in the loss of cobalt. The technical problem of relatively low recovery rate also solves the serious environmental pollution and harm to the human body caused by the oxygen pressure acid leaching method in the prior art. Metal sulfide is oxidized to elemental sulfur and forms a package on the mineral surface, resulting in Decreased leaching rate and subsequent technical difficulties in the separation of copper, nickel and cobalt

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
  • Low nickel matte high-temperature oxygen pressure water leaching process
  • Low nickel matte high-temperature oxygen pressure water leaching process
  • Low nickel matte high-temperature oxygen pressure water leaching process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The chemical composition of low-matte raw materials: Ni13.57%, Fe51.86%, Cu2.5%, Co0.32%, S23.21%; grind the raw material low-matte to 200 mesh, weigh 100g, press liquid Mix solid ratio 4:1 with water to form ore slurry, put it into a 2L autoclave, pass through oxygen to heat and leaching, under oxygen pressure of 1.0MPa, temperature of 160°C, stirring speed of 600r / min, leaching for 2.5h. After the leaching is completed, the analysis shows that the leaching rate of Ni is 98.30%, the leaching rate of Co is 98.12%, the leaching rate of copper is 97.17%, and the leaching rate of iron is 4.7%. The vacuum suction filter is used for solid-liquid separation, and conventional extraction and separation methods are used to separate copper, cobalt and nickel. .

Embodiment 2

[0023] The chemical composition of low-matte raw materials: Ni19.4%, Fe54.06%, Cu2.8%, Co0.35%, S24.17%; grind the raw material low-matte to 325 mesh, weigh 200g, press liquid Mix solid ratio 5:1 with water to form ore slurry, put it into a 2L autoclave, pass through oxygen to heat and leaching, under the oxygen pressure of 1.2MPa, temperature of 140°C, stirring speed of 600r / min, leaching for 3h. After the leaching was completed, the analysis showed that the Ni leaching rate was 98.35%, the Co leaching rate was 98.75%, the copper leaching rate was 98.21%, and the iron leaching rate was 3.5%. nickel.

Embodiment 3

[0025] The chemical composition of the raw material: Ni14.72%, Fe53.68%, Cu2.4%, Co0.43%, S22.18%; the raw material low matte was ground to 400 mesh, weighed 200g, according to the liquid-solid ratio of 3 : 1 mixed with water to form ore slurry, put into a 2L autoclave, feed oxygen to heat and leach, at an oxygen pressure of 1.2MPa, a temperature of 170°C, and a stirring speed of 500r / min, leaching for 3.5h. After the leaching was completed, the analysis showed that the Ni leaching rate was 99.03%, the Co leaching rate was 98.83%, the copper leaching rate was 98.09%, and the iron leaching rate was 3.9%. nickel.

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
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low nickel high-temperature oxygen pressure water leaching process, relating to the technical field of comprehension utilization of low nickel matte in wet-process metallurgy. The process comprises the following steps of: carrying out ore grinding treatment on the low nickel matte, then mixing the low nickel matte and water uniformly into ore pulp, putting the ore pulp into a high pressure autoclave for carrying out high-temperature oxygen pressure water leaching, carrying out solid-liquid separation after completion of leaching, and adopting a conventional extraction separation method to separate copper, cobalt and nickel. The process solves the problem that in the prior art, the recovery rater of the cobalt is very low as cobalt is easily oxidized and enters into furnace clinkers in a firing method blowing low nickel matter process, and simultaneously solves the technical difficult problems that in the prior art, an oxygen pressure acid leaching method serious pollutes the environmental pollution and harms human bodies, metal sulfide is oxidized into elemental sulfur, thereby resulting in dropping of leaching rate of metals and difficult follow-up separation of copper, nickel and cobalt.

Description

[0001] technical field [0002] The invention relates to the technical field of comprehensive utilization of low matte nickel in hydrometallurgy. Background technique [0003] Low-matte nickel is mainly an intermediate product after blowing and desulfurization of nickel-copper sulfide concentrate converter. The products are used in the production of high-purity nickel, electrolytic nickel and nickel sulfate and other nickel salts, and are also widely used in the production of stainless steel and other special steel industries. In addition to nickel, low matte is rich in copper, cobalt and a large amount of platinum group metals to be recycled. There are two traditional processes: one is low nickel matte through converter blowing to produce high nickel matte, high nickel matte grinding floating-nickel sulfide melting and casting- Nickel sulfide soluble anode diaphragm electrolysis-anolyte three-stage purification of soluble anode electrolytic refining process; the other is lo...

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 Applications(China)
IPC IPC(8): C22B3/04C22B23/00
CPCY02P10/20
Inventor 沈明伟冀成庆朱昌洛蔡旺
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI