CN106756101B

CN106756101B - A kind of wet method preparation process of nickel

Info

Publication number: CN106756101B
Application number: CN201710028857.8A
Authority: CN
Inventors: 张学核; 李江平; 罗建江; 李渭鹏; 张宇飞; 王春海; 华维; 马晓磊; 张泰隆
Original assignee: FUKANG REFINERY OF XINJIANG XINXIN MINING INDUSTRY Co Ltd
Current assignee: FUKANG REFINERY OF XINJIANG XINXIN MINING INDUSTRY Co Ltd
Priority date: 2017-01-16
Filing date: 2017-01-16
Publication date: 2018-12-28
Anticipated expiration: 2037-01-16
Also published as: CN106756101A

Abstract

This application discloses a kind of wet method preparation process of nickel, including water quenching Metallized high Ni matte；Ball milling, concentrator sedimentation, one section of normal pressure, one section of leachate, that is, finished fluid are carried out using the NIOOH of electroxidation preparation except cobalt, through solid-liquor separation be purified except cobalt after liquid tune acid carry out electrodeposition and obtain electric nickel；Liquid excludes Na+ in solution by " washing the heavy nickel of sodium " after electrodeposition, then deploys NiCO with anolyte₃Prepare catholyte, later again by catholyte with except after cobalt liquid mix tune acid directly progress electrodeposition, obtain electric nickel；Anolyte returns the step of nickel liquid conversion catholyte can save anolyte liquid return leaching system, with internal short-circuit cycle instead of former complicated interminable recycle circuit, greatly reduce the cycle cost of solution, and increase the yield of catholyte, mitigate the produce load in mill leaching workshop, while can be with the acid amount of balance system.

Description

A kind of wet method preparation process of nickel

Technical field

The application category chemical technology field, specifically, being related to a kind of wet method preparation process of nickel.

Background technique

The wet method smelting process preparation process of nickel at present are as follows: work is leached using the two-stage countercurrent of one section of normal pressure, one section of pressurization Skill inhibits copper, iron, noble metal in leached mud, and nickel cobalt is selectively leached into solution, and purification process is (black using NiOOH Nickel) remove cobalt method, purified leachate electrolytically output metallic nickel.The technique has metal recovery rate height, and technique Using without pernicious gas and the advantages of generate, be conducive to environmental protection in the process.

But the set wet processing, with the continuous expansion of smeltery's size of capacity, many technological problems highlight, such as Cumbersome, tediously long etc., processing cost is much higher than other nickel production technologies, to improve Business survival space, optimization technique, control Production cost processed is extremely urgent.

Summary of the invention

In view of this, the purpose of the application is to solve the problems of the above-mentioned prior art, providing one kind can optimize Technique shortens process flow, reduces the wet method preparation process for being produced into the original nickel for solving production technology bottleneck.

In order to solve the above-mentioned technical problem, the application has opened a kind of wet method preparation process of nickel, it is characterised in that including with Lower step:

Step 1: water quenching Metallized high Ni matte；

Step 2: the converter mattes Jing Guo water quenching are subjected to ball milling using ball mill, enters concentrator after ball milling and settles, underflow With pressureleaching solution and anolyte through pulp ingredient；

Step 3: one section of normal pressure is carried out, enters concentrator after one section of normal pressure leaching ore pulp is qualified, settling ore pulp solid-liquor separation, Overflowing liquid becomes qualified finished fluid after filtering, and leached mud is through anolyte and returns slurry ingredient two sections of normal pressures of progress, separates slag Pressure leaching is carried out, pressure leaching ore pulp carries out solid-liquor separation, and separating liquid returns to normal pressure leaching；

Step 4: one section of leachate, that is, finished fluid obtain except cobalt through solid-liquor separation using the NIOOH of electroxidation preparation Purification except after cobalt liquid tune acid carry out electrodeposition and obtain electric nickel；

Liquid excludes Na+ in solution by " washing the heavy nickel of sodium " after electrodeposition, then deploys NiCO with anolyte₃Catholyte is prepared, it Afterwards again by catholyte with except after cobalt liquid mix tune acid directly progress electrodeposition, obtain electric nickel.

Further, including two sections of ball mills, for the ball mill of a 2100 × 4500mm of Φ as one section of ball milling, two common Ball mill is as two sections of ball millings.

Compared with prior art, the application can be obtained including following technical effect:

Anolyte returns the step of nickel liquid conversion catholyte can save anolyte liquid return leaching system, with internal short circuit Circulation greatly reduces the cycle cost of solution, and increase the yield of catholyte instead of former complicated interminable recycle circuit, Mitigate the produce load in mill leaching workshop, while can be with the acid amount of balance system.

Sodium is washed in pure anolyte neutralization, since the impurity concentrations such as Cu, Fe are low in anolyte, the NiCO of production₃It is dissolving Solution impurity is low afterwards, can achieve the impurity requirement standard of finished fluid, has NiCO₃Lysate is used as finished fluid or catholyte Condition directly adjusts electrodeposition after acid to use, to make NiCO₃Lysate does not return again to the preceding paragraph pressurization operation, to optimize following for solution Endless path reduces the load of pressurization operation processing anolyte, reduces finished fluid liquid making cost and utilizes, can effectively shorten 100m³/ day Anolyte internal circulating load, increases cathode flow quantity, and process for stabilizing production guarantees that electric nickel high current produces while substantially reducing solution and follows Ring expense.

The ball mill of a newly-increased 2100 × 4500mm of Φ, newly-increased ball mill can be with present 3# or 4# ball milling unit Cheng Yi, two sections of series connection open-circuit grindings, using newly-increased ball mill as one section of ball milling, existing 3# or 4# ball mill is as two sections of balls Mill, realizes independent closed circuit grinding, adapts to the diversity of raw material, to achieve the purpose that reduce production cost.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:

Fig. 1 is the flow chart of the application.

Specific embodiment

Presently filed embodiment is described in detail below in conjunction with accompanying drawings and embodiments, how the application is applied whereby Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.

As shown in Figure 1, the application the following steps are included:

Step 1: water quenching Metallized high Ni matte；

Step 3: one section of normal pressure is carried out, enters concentrator after one section of normal pressure leaching ore pulp is qualified, settling ore pulp solid-liquor separation, Overflowing liquid becomes qualified finished fluid after filtering, and leached mud is through anolyte and returns slurry ingredient two sections of normal pressures of progress, separates slag Pressure leaching is carried out, pressure leaching ore pulp carries out solid-liquor separation, and separating liquid returns to normal pressure leaching.

Step 4: one section of leachate, that is, finished fluid is carried out using the NIOOH (black nickel) of electroxidation preparation except cobalt.Divide admittedly through liquid Liquid tune acid carries out electrodeposition after removing cobalt from what is be purified.Liquid excludes Na+ in solution by " washing the heavy nickel of sodium " after electrodeposition, then uses anode Liquid deploys NiCO₃(nickelous carbonate) prepares catholyte, later again by catholyte with except after cobalt liquid mix tune acid directly progress electrodeposition.

The application takes grinding mode for mixing ore grinding, since raw material uses the copper nickel converter mattes of converter mattes and copper mine, The two ore grinding characteristic is different (converter mattes brittleness good easily mill, copper nickel converter mattes are not easy to grind), and two kinds of raw material mixing ore grindings are easy Grinding particle size is caused not meet technique requirement, such case can all lead to technique obstacle.

Above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the application Be not limited to forms disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, Modification and environment, and by the technology of above-mentioned introduction or related fields or can know in embodiment contemplated scope described herein Knowledge is modified.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then all Ying Ben In the protection scope for applying for appended claims.

Claims

1. a kind of wet method preparation process of nickel, it is characterised in that the following steps are included:

Step 1: water quenching Metallized high Ni matte；

Step 2: the converter mattes Jing Guo water quenching being subjected to ball milling using ball mill, enters concentrator after ball milling and settles, underflow, which is used, to be added Press leachate and anolyte through pulp ingredient；

Step 3: carrying out one section of normal pressure, enter concentrator, settling ore pulp solid-liquor separation, overflow after one section of normal pressure leaching ore pulp is qualified Liquid becomes qualified finished fluid after filtering, and leached mud carries out two sections of normal pressures through anolyte and anti-slurry ingredient, and separation slag carries out Pressure leaching, pressure leaching ore pulp carry out solid-liquor separation, and separating liquid returns to normal pressure leaching；

Step 4: one section of leachate, that is, finished fluid be purified except cobalt through solid-liquor separation using the NiOOH of electroxidation preparation Except after cobalt liquid tune acid carry out electrodeposition and obtain electric nickel；

Liquid excludes Na in solution by " washing the heavy nickel of sodium " after electrodeposition⁺, then with anolyte deploy NiCO₃Prepare catholyte, Zhi Houzai By catholyte with except after cobalt liquid mix tune acid directly progress electrodeposition, obtain electric nickel.

2. the wet method preparation process of nickel according to claim 1, it is characterised in that: including two sections of ball mills, a Φ The ball mill of 2100 × 4500mm is as one section of ball milling, and two general milling machines are as two sections of ball millings.