CN102634655A

CN102634655A - Chlorination leaching method of laterite sulfurized precipitate

Info

Publication number: CN102634655A
Application number: CN2012101077482A
Authority: CN
Inventors: 刘玉强; 吕海波; 刘世和; 马玉天; 范国锋
Original assignee: Jinchuan Group Co Ltd
Current assignee: Jinchuan Group Co Ltd
Priority date: 2012-04-13
Filing date: 2012-04-13
Publication date: 2012-08-15

Abstract

The invention relates to a chlorination leaching method of laterite sulfurized precipitate. Chlorination leaching is utilized to obtain the metallic-nickel-enriched turnover liquid which can directly enter the nickel production system. The technological process comprises the following steps: (1) mixing the laterite sulfurized precipitate and water in a mass ratio of (2-6):1, and introducing chlorine gas of which the pressure is 0.1-0.5Mpa; and (2) control of leaching of chlorine gas: the liquid-to-solid ratio is controlled at (2-6):1, the leaching temperature is 70-80 DEG C, the leaching potential is 450-480mv, the leaching time is 2-4 hours, and the leaching stock solution is a copper-bearing 30-50 g/L water solution. The invention obtains a nickel-cobalt sulphate solution of which the nickel content is greater than 90%: more than 90% of nickel and cobalt in the laterite sulfurized precipitate are leached and enter the solution, and valuable metals in the residues are comprehensively recycled, thereby promoting the recycling of waste ores.

Description

A kind of laterite sulfide precipitation thing chlorination leaching method

Technical field

The present invention relates to metallurgical technology field, be specifically related to a kind of laterite sulfide precipitation thing chlorination leaching method.

Background technology

Outsourcing laterite sulfide precipitation thing, the grey black look, granularity below 1mm, the about 1.2 ~ 1.3t/m of proportion ³, moisture is 40% ~ 50%; Valuable metal Ni, Cu, Co mainly exist with oxide morphology in the material, and impure kind is many, and physicochemical characteristic is complicated, sees table 1 and table 2 for details.Adopt methods such as ordinary method such as acidleach, roasting-acidleach to handle all to exist that the metal direct yield is low, tooling cost is high and the problem of operating environment difference.

The chemical ingredients of certain nickel ore concentrate of table 1 (%)

The sample title	Ni	Co	Cu	Fe	Zn	Mg	CaO	S
									Raw material 1	23.62	0.47	0.15	14.85	0.078	3.90	0.043	31.06
Raw material 2	19.38	0.48	0.5	13.9	0.094	2.98	0.043	30.78
									On average	21.5	0.475	0.325	14.38	0.086	3.44	0.043	31.19

The thing phase composition (%) of certain nickel ore concentrate of table 2

Mineral name	Total nickel	The nickel of the water solubles	The nickel of sulfide	The nickel of oxide compound
					Content %	21.95	10.57	11.49	0.13
Mineral name	Total cobalt	The cobalt of the water solubles	The cobalt of sulfide	The cobalt of oxide compound
					Content %	0.46	0.2	0.23	0.02
Mineral name	Total copper	Cupric oxide	The inferior pig copper	The former pig copper
					Content %	0.21	0.017	0.038	0.15
Mineral name	Total iron	The iron of sulfide	The iron of oxide compound
					Content %	14.03	12.82	1.37

Summary of the invention

The objective of the invention is to adopt ordinary method to handle the deficiency that exists to laterite sulfide precipitation thing; A kind of new leaching metallurgical technology of handling laterite sulfide precipitation thing is proposed; Make the nickel more than 90% in the material, cobalt got into solution by leaching; And comprehensively reclaim the valuable metal in the slag, promote the recycling in discarded ore deposit.

The technical scheme that is adopted is: a kind of laterite sulfide precipitation thing chlorination leaching method, leach through chlorination, and the liquid in-out that obtains enriched in metals nickel can directly get into the nickel production system, and technical process is specific as follows:

(1) described laterite sulfide precipitation thing is mixed than 2～6:1 with quality, and feeding pressure is the chlorine of 0.1～0.5 Mpa;

(2) control chlorine leaches: it is 2～6:1 that liquid-solid ratio is leached in control, and extraction temperature is 70 ℃～80 ℃, leaches current potential 450mv～480mv, and extraction time is 2～4h, leaches the aqueous solution of stoste cupric 30-50g/L.

The invention has the beneficial effects as follows:

(1) chlorine gas selecting leaches and can adopt the low acid operation of normal pressure, and equipment, instrument are prone to solve.

(2) because the strong oxidation and the Cu of chlorine ⁺/ Cu ²⁺Katalysis, chemical reaction velocity is fast, leaching process can carry out in self-heating under the boiling point, energy consumption is low, steam output is little, helps the water balance of whole technology.

(3) leach liquor can directly send the nickel production system to produce the nickel product, and can comprehensively reclaim the valuable metal in the slag, promotes the recycling in discarded ore deposit.

The present invention is simple effective, an eco-friendly flow process, is fit to handle laterite sulfide precipitation thing material.

Description of drawings

Fig. 1 doesProcess flow diagram of the present invention.

Embodiment

Below in conjunction with accompanying drawing the present invention and effect thereof are described further.

A kind of laterite sulfide precipitation thing chlorination leaching method leaches through chlorination, and the liquid in-out that obtains enriched in metals nickel can directly get into the nickel production system, and each section of technical process is specific as follows:

(1) described outsourcing mineral are mixed than 2:1,3:1,4:1,5:1 or 6:1 with quality, and feeding pressure is the chlorine of 0.1,0.2,0.2,0.4 or 0.5 Mpa;

(2) control chlorine leaches: it is 2:1,3:1,4:1,5:1 or 6:1 that liquid-solid ratio is leached in control; Extraction temperature is 70 ℃, 60 ℃ or 80 ℃; Leach current potential 450mv, 460mv, 470mv 480mv, extraction time is 2,3 or 4h, leaches the aqueous solution of stoste cupric 30～50g/L.

Chlorine transmits electronics through Cu+/Cu2+ or Fe2+/Fe3+ galvanic couple among the present invention, and the redox potential of control solution is leached nickel, copper, iron, cobalt in the raw material, and sulphur is oxidized to elementary sulfur.

Concrete work flow of the present invention: the pulp groove injects chlorine; To expect that with bridge crane bag winches to the charging opening of pulp groove; Manual work adds the pulp groove with material relatively uniformly, leaches with being pumped into the leaching vat activation of heating, and leaching slurry carries out liquid-solid separation through pressure filter; Send the nickel system when leach liquor reaches, leached mud send the pyrogenic process system handles.

The present invention produces result of implementation and sees table 3,4.

Table 3 leach liquor composition g/l

Element	Ni	Cu	Fe	Co	Pb	Zn	Cl ^-
								Composition	48.32	0.52	2.70	1.105	0.0028	0.062	72.58

Table 4 leached mud composition %

Element	Ni	Cu	Fe	Co	Pb	Zn	S
								Composition	4.06	1.37	4.26	0.0011	0.082	0.036	82

Claims

1. laterite sulfide precipitation thing chlorination leaching method is characterized in that: leach through chlorination, the liquid in-out that obtains enriched in metals nickel can directly get into the nickel production system, and technical process is specific as follows:

2. a kind of laterite sulfide precipitation thing chlorination leaching method according to claim 1, it is characterized in that: chlorine passes through Cu ⁺/ Cu ²⁺Or Fe ²⁺/ Fe ³⁺Galvanic couple transmits electronics, and the redox potential of control solution is leached nickel, copper, iron, cobalt in the raw material, and sulphur is oxidized to elementary sulfur.