CN103952548A

CN103952548A - Continuous chlorine leaching method for white alloy

Info

Publication number: CN103952548A
Application number: CN201410179598.5A
Authority: CN
Inventors: 杨志强; 周林华; 闫忠强; 胡家彦; 陈文福; 丁庆华; 朱永泽; 冯玉洁; 周春元; 朱锐伦; 曾辉; 胡伟; 李洪江
Original assignee: Jinchuan Group Co Ltd
Current assignee: Lanzhou Jinchuan New Material Technology Co., Ltd.
Priority date: 2014-04-30
Filing date: 2014-04-30
Publication date: 2014-07-30
Anticipated expiration: 2034-04-30
Also published as: CN103952548B

Abstract

The invention discloses a continuous chlorine leaching method for white alloy. The continuous chlorine leaching method for white alloy comprises the following steps: crushing the white alloy and then sieving to obtain a powder with a size of minus 80 to minus 100 meshes; continuously adding the white alloy powder in a three-compartment leaching kettle, and adding a hydrochloric acid solution with a concentration of 60-80 g/L in the three-compartment leaching kettle; charging chlorine in each compartment of the three-compartment leaching kettle, setting different potentials in the compartments, and adequately carrying out leaching reaction to obtain slurry; continuously discharging the slurry to a leaching intermediate tank, and filtering by a plate-and-frame filter press to obtain leachate and residue; and washing and filtering the residue, and then abandoning the washed residue, and recovering the residue washing solution. The white alloy powder is high in reactivity after being crushed, and capable of increasing a speed of participating in inlet-outlet reaction; chlorine is used as an oxidizing agent in the leaching process, valuable metals such as copper, cobalt and iron in the powder enter the solution in a chloride state by controlling the potentials in the kettle, and the leaching rates of cobalt and copper can achieve more than 99%.

Description

A kind of continuous chlorine leaching method of white metal

Technical field

The present invention relates to technical field of non-ferrous metallurgy, specifically a kind of continuous chlorine leaching method of white metal.

Background technology

White metal is a kind of copper-cobalt alloy, be metallic particles shape, its main component is Co, Cu, Fe, the content ratio of these three kinds of elements in lily enters approaches 1:1:1, conventional extract technology is mainly nitration mixture and leaches and oxidation acid leaching, have that leaching yield is low, speed of response is slow, leached mud is high containing cobalt cupric, and economy is not good.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of white metal continuous chlorine leaching method.

The present invention solves its technical problem by the following technical solutions.

A kind of continuous chlorine leaching method of white metal, comprises the following steps:

Step 1, screening after white metal is pulverized, obtains-80～-100 powder materials;

Step 2, is added to three compartment leaching kettles continuously by the white metal powder obtaining in step 1, is the hydrochloric acid soln of 60～80g/L to adding concentration in three compartment leaching kettles, and hydrochloric acid soln than being 5:1, leaches 85～110 DEG C of temperature in the kettle with white metal powder quality; In 1#, the 2# of three compartment leaching kettles and 3# chamber, pass into chlorine, different current potentials be set in each compartment, when the current potential in each compartment reach set current potential after stop supplies chlorine, each compartment potential value arranges in table 1:

Table 1

Project	Span of control (mercurous chloride electrode)
		Leaching kettle 1 ^#Chamber current potential	480-500mv
Leaching kettle 2 ^#Chamber current potential	500-550mv
		Leaching kettle 3 ^#Chamber current potential	＞600mv

, fully after Leaching reaction, obtain slurry;

Step 3, obtains slurry after step 2 is leached and drains into continuously leaching medial launder, filters and obtains leach liquor and filter residue with plate-and-frame filter press;

Step 4, filter residue is discarded after washing and filtering, and filter residue scavenging solution reclaims.

The continuous chlorine leaching method of a kind of white metal provided by the invention, white metal powder has possessed higher reactive behavior after pulverizing, can strengthen the speed that it participates in turnover reaction, in leaching process using chlorine as oxygenant, by controlling the current potential in leaching kettle, make the valuable metals such as copper in powder, cobalt, iron be muriate form and dissolve and enter solution, the leaching yield of cobalt, copper can reach more than 99%, and the economy of white metal leaching process significantly improves.

Brief description of the drawings

fig. 1 is the present invention's three compartment leaching kettle structural representations.

Embodiment

Step 1, screening after white metal is pulverized; The spin vibration sieve that adds vibration mill realizes mill screen banks and closes and vibration mill series-parallel system comminuting matter, obtains-80～-100 powder materials after sieving;

Step 2, as shown in Figure 1, screw feeder is added to white metal powder by opening for feed 4 1# compartment 1,2# compartment 2, the 3# compartment 3 of three compartment leaching kettles continuously, and be that the hydrochloric acid soln of 60～80g/L is as leach liquor initial acid to adding concentration in three compartment leaching kettles, hydrochloric acid soln than being 5:1, leaches 85～110 DEG C of temperature in the kettle with white metal powder quality; Add entrance 6 by chlorine and pass into chlorine in 1# compartment 1,2# compartment 2 and the 3# compartment 3 of three compartment leaching kettles, different current potentials is set in each compartment, stop supplies chlorine after the current potential in each compartment reaches setting current potential; Current potential settings in compartment are in table 1:

Table 1

, constantly stir by the agitating vane 7 arranging in each compartment, fully after Leaching reaction, obtain slurry;

Step 3, obtains slurry and is discharged to continuously leaching medial launder from discharge gate 5 after step 2 is leached, filter and obtain leach liquor and filter residue with plate-and-frame filter press;

Embodiment 1

White metal is crushed and screened to-80 orders, white metal material after screening is dropped into three compartment reactors with the input speed of 400kg/h, white metal input amount 400kg/h, chlorine add-on 570kg/h, initial acid is 60g/L hydrochloric acid soln, liquid-solid ratio 5:1,85 DEG C of leaching process temperature, leaching kettle 1# compartment current potential 497mV, 2# compartment current potential 500mV, 3# compartment current potential 655mV, extraction time 8.2h, obtains slurry; Drain into continuously leaching medial launder by obtaining slurry after leaching, filter and obtain leach liquor and filter residue with plate-and-frame filter press; Filter residue is discarded after washing and filtering, and filter residue scavenging solution reclaims.

Embodiment 2

White metal is crushed and screened to-100 orders, white metal material after screening is dropped into three compartment reactors with the input speed of 400kg/h, white metal input amount 400kg/h, chlorine add-on 570kg/h, initial acid is 70/L hydrochloric acid soln, liquid-solid ratio 5:1,104 DEG C of leaching process temperature, leaching kettle 1# compartment current potential 480mV, 2# compartment current potential 520mV, 3# compartment current potential 680mV, extraction time 8h, obtains slurry; Drain into continuously leaching medial launder by obtaining slurry after leaching, filter and obtain leach liquor and filter residue with plate-and-frame filter press; Filter residue is discarded after washing and filtering, and filter residue scavenging solution reclaims.

Embodiment 3

White metal is crushed and screened to-80 orders, white metal material after screening is dropped into three compartment reactors with the input speed of 400kg/h, white metal input amount 400kg/h, chlorine add-on 570kg/h, initial acid 80g/L hydrochloric acid soln, liquid-solid ratio 5:1,110 DEG C of leaching process temperature, leaching kettle 1# compartment current potential 495mV, 2# compartment current potential 550mV, 3# compartment current potential 685mV, extraction time 7.5h, obtains slurry; Drain into continuously leaching medial launder by obtaining slurry after leaching, filter and obtain leach liquor and filter residue with plate-and-frame filter press; Filter residue is discarded after washing and filtering, and filter residue scavenging solution reclaims.

Embodiment 4

White metal is crushed and screened to-90 orders, white metal material after screening is dropped into three compartment reactors with the input speed of 400kg/h, white metal input amount 400kg/h, chlorine add-on 570kg/h, initial acid is 60g/L hydrochloric acid soln, liquid-solid ratio 5:1,85 DEG C of leaching process temperature, leaching kettle 1# compartment current potential 497mV, 2# compartment current potential 550mV, 3# compartment current potential 685mV, extraction time 8h, obtains slurry; Drain into continuously leaching medial launder by obtaining slurry after leaching, filter and obtain leach liquor and filter residue with plate-and-frame filter press; Filter residue is discarded after washing and filtering, and filter residue scavenging solution reclaims.

Embodiment 5

White metal is crushed and screened to-100 orders, white metal material after screening is dropped into three compartment reactors with the input speed of 400kg/h, white metal input amount 400kg/h, chlorine add-on 570kg/h, initial acid is 70g/L hydrochloric acid soln, liquid-solid ratio 5:1,104 DEG C of leaching process temperature, leaching kettle 1# compartment current potential 497mV, 2# compartment current potential 550mV, 3# compartment current potential 685mV, extraction time 8.5h, obtains slurry; Drain into continuously leaching medial launder by obtaining slurry after leaching, filter and obtain leach liquor and filter residue with plate-and-frame filter press; Filter residue is discarded after washing and filtering, and filter residue scavenging solution reclaims.

Claims

1. ?a kind of continuous chlorine leaching method of white metal, is characterized in that, comprises the following steps:

Step 2, is added to three compartment leaching kettles continuously by the white metal powder obtaining in step 1, is the hydrochloric acid soln of 60～80g/L to adding concentration in three compartment leaching kettles, and hydrochloric acid soln than being 5:1, leaches 85～110 DEG C of temperature in the kettle with white metal powder quality; In 1#, the 2# of three compartment leaching kettles and 3# chamber, pass into chlorine, different current potentials is set in each compartment, potential value is in table 1:

Table 1

, fully after Leaching reaction, obtain slurry;