CN103990547A

CN103990547A - Mineral separating technology for complex zinc oxide mines difficult to separate

Info

Publication number: CN103990547A
Application number: CN201410189889.2A
Authority: CN
Inventors: 曾茂青; 孙广周
Original assignee: Kunming Mineral Resources Supervision Inspection Center Of Ministry Of Land And Resources
Current assignee: Kunming Mineral Resources Supervision Inspection Center Of Ministry Of Land And Resources
Priority date: 2014-05-07
Filing date: 2014-05-07
Publication date: 2014-08-20
Anticipated expiration: 2034-05-07
Also published as: CN103990547B

Abstract

The invention relates to a mineral separating technology for complex zinc oxide mines difficult to separate, namely a dehydration zinc floating technology. The mineral separating technology includes the following steps: mine grinding, lead sulfide flotation, zinc sulfide flotation and lead oxide flotation are sequentially carried out on raw mines, thickening and dehydration are firstly carried out on tailings, negative effects caused by inevitable irons in pulp are basically removed, and the flotation environment is improved; then clean water is supplemented in sediment sand to conduct pulp mixing, and flotation of zinc oxide mines is then carried out. Compared with a traditional desliming zinc floating technology, the mineral separating technology has the advantages that the zinc oxide mines is high in recovery rate, the recovery rate reaches 5%-10%, the flotation process is easy to adjust and control and stable, and indexes are stable. The mineral separating technology is suitable for conducting mineral separating on the complex zinc oxide mine difficult to separate.

Description

A kind of complicated difficult dressing zinc oxide ore ore-dressing technique

Technical field

The present invention relates to a kind of complicated difficult dressing zinc oxide ore ore-dressing technique, belong to mineral manufacture field.

Background technology

Along with development of resources, tractable sulphide ore is fewer and feweri, and a large amount of oxide ores, because its grade is low, character is extremely complicated, can not get effective utilization always, stores up for a long time or discards, and not only wastes resource, and occupies soil, contaminated environment.As: though the built zinc hydrometallurgy factory that produces 120000 tons of metallic zinc per year of the plumbous zinc ore of Lanping, yunnan Province, can utilize containing ore more than zinc grade l5%, but comprehensive utilization of resources rate is far below 50%, pile at present and had low-grade lead-zinc stone and reach 1,200 ten thousand tons, also continued to store up to increase the speed of 3,000,000 tons of left and right every year.

Conventionally, lead oxide adopts traditional handicraft just can obtain good sorting index, and the more difficult choosing of zinc oxide.Traditional zinc oxide ore-dressing technique is mainly " desliming flotation ", although (10 μ m) can get rid of the interference of sludge to zinc oxide flotation more up hill and dale to deviate from sludge, but when desliming, also take off partial oxidation zinc mineral, cause the zinc oxide rate of recovery low, and desliming often adopts hydrocyclone to carry out, existence is subject to feed ore concentration, pressure size, impact to the large minor swing in ore deposit, cause desliming unstable, be difficult to the problems such as regulation and control, index be unstable.

The deficiency of the zinc oxide floatation process based on traditional, urgently invents a kind of new technology, can improve the rate of recovery, can make whole process be easy to regulate, control and stablize again.

Summary of the invention

For the deficiency of above-mentioned existence, the present invention proposes a kind of complicated difficult dressing zinc oxide ore ore-dressing technique, and it can improve the complicated difficult dressing zinc oxide ore rate of recovery, reaches 5 ~ 10%.

The present invention is complicated difficult dressing zinc oxide ore beneficiation new process, and its key step and technical parameter are as follows:

(1) lead-zinc is carried out to muck, ore grinding, be controlled at-0.074mm of mog accounts for 75 ~ 90% scopes, and selected pulp density is 25 ~ 35%;

(2) ore grinding product order enters conventional vulcanized lead, zinc sulphide, lead oxide flotation operation, and adds the conventional floating agent of tradition, respectively output vulcanized lead, zinc sulphide and three concentrate products of lead oxide;

(3) lead oxide flotation tailing first carries out thickening, is simultaneously also effectively to remove unavoidable ion Ca in ore pulp ²⁺, Mg ²⁺, Pb ²⁺and Fe ³⁺process, and add clear water to size mixing to sand setting product, pulp density is adjusted to 25 ~ 35%, enters zinc oxide flotation operation;

(4) flotation of zinc oxide mineral adopts " one roughing, twice selected, scan for twice " technique to sort, roughly select operation and add sodium carbonate 1000 ~ 2000g/t, calgon 200 ~ 300 g/t, waterglass 300 ~ 500 g/t, vulcanized sodium 5000 ~ 7000 g/t, octadecylamine 500 ~ 700 g/t and 2# oil 50 ~ 80 g/t; Scan for the first time operation I and add vulcanized sodium 800 ~ 1200 g/t and octadecylamine 150 ~ 250 g/t; Scan for the second time II operation and add octadecylamine 50 ~ 150 g/t, whole zinc oxide floatation process keeps pH values of pulp=11 ~ 12, output zinc oxide concentrate product.

Four kinds of unavoidable ions are above affected to mechanism to zinc oxide mineral floatability and show, they all have significant inhibitory action to zinc oxide, lead oxide flotation tailing through thickening, add clear water and size mixing after, Ca ²⁺, Mg ²⁺, Pb ²⁺and Fe ³four kinds of unavoidable ion concentration have approximately reduced by 3 ~ 4 times, have alleviated significantly its inhibitory action to zinc oxide, and Floatation Rate is improved.

Described lead-zinc grade is: Pb 1.21-3.55%, Zn 6.04-7.78%, Lead oxidation rate 71.01-76.38%, zinc oxygenation efficiency 70.14-77.13%.

The 2# oil content adopting in the present invention is terpenic oil and two kinds of chemistry oil, is widely used in the foaming agent in the flotation of non-ferrous metal, in mine throughout the country, all have and should have, and be a kind of foaming agent of routine.The percentage occurring in the present invention is mass percent.

Compared with the floating zinc technology of dehydration of the present invention floats zinc technology with traditional desliming, have whole technical process and be easy to regulate, control and stablize, the zinc oxide mineral rate of recovery improves 5～10% advantage, has improved mineral resources comprehensive utilization rate.

four, brief description of the drawings

Fig. 1 is process flow diagram of the present invention.

five, detailed description of the invention

Embodiment mono-:

Yunnan lead-zinc Pb 1.21%, Zn 7.78%, Lead oxidation rate 71.01%, zinc oxygenation efficiency 70.14%, sort by the technological process shown in Fig. 1.Mog-0.074mm accounts for 85%, and ore grinding product order enters conventional vulcanized lead, zinc sulphide, lead oxide flotation operation, and adds the conventional floating agent of tradition, respectively output vulcanized lead, zinc sulphide, three concentrate products of lead oxide.Lead oxide flotation tailing first carries out thickening, toward adding in sand setting, clear water is sized mixing, pulp density is adjusted to 27%, enters zinc oxide flotation operation and adds conventional floating agent to sort.

Raw ore, after the technological process shown in Fig. 1 sorts, wherein obtains zinc sulfide concentrates Zn48.12%, the rate of recovery 26.37%, zinc oxide concentrate Zn 31.58%, the rate of recovery 61.09%, total zinc concentrate Zn 35.24%, total zinc recovery 87.46%.

Embodiment bis-:

Yunnan lead-zinc Pb 3.55%, Zn 6.40%, Lead oxidation rate 76.38%, zinc oxygenation efficiency 77.13%, sort by the technological process shown in Fig. 1.Mog-0.074mm accounts for 80%, and ore grinding product order enters conventional vulcanized lead, zinc sulphide, lead oxide flotation operation, and adds the conventional floating agent of tradition, respectively output vulcanized lead, zinc sulphide, three concentrate products of lead oxide.Lead oxide flotation tailing first carries out thickening, toward adding in sand setting, clear water is sized mixing, pulp density is adjusted to 25%, enters zinc oxide flotation operation and adds conventional floating agent to sort.

Raw ore, after the technological process shown in Fig. 1 sorts, wherein obtains zinc sulfide concentrates Zn54.10%, the rate of recovery 20.23%, zinc oxide concentrate Zn 29.41%, the rate of recovery 61.85%, total zinc concentrate Zn32.16%, total zinc recovery 82.08%.

Claims

1. a complicated difficult dressing zinc oxide ore ore-dressing technique, is characterized in that step is as follows:

(1) lead-zinc is carried out to muck and ore grinding, be controlled at-0.074mm of mog accounts for 75 ~ 90% scopes, and selected pulp density is 25 ~ 35%;

(2) ore grinding product order enters conventional vulcanized lead, zinc sulphide, lead oxide flotation operation, and adds the conventional floating agent of tradition, respectively output vulcanized lead, zinc sulphide and lead oxide concentrate product; Lead oxide flotation tailing first carries out thickening, has also removed unavoidable ion Ca in ore pulp simultaneously ²⁺, Mg ²⁺, Pb ²⁺and Fe ³⁺the process of the negative effect to zinc oxide mineral floating, sand setting production concentration is 40 ~ 60%;

(3) above-mentioned sand setting product is added to clear water and size mixing, pulp density is adjusted to 25 ~ 35%, then enters the flotation operation of zinc oxide mineral;

(4) flotation of zinc oxide mineral adopts " one roughing, twice selected, scan for twice " technique to sort, roughly select operation and add sodium carbonate 1000 ~ 2000g/t, calgon 200 ~ 300 g/t, waterglass 300 ~ 500 g/t, vulcanized sodium 5000 ~ 7000 g/t, octadecylamine 500 ~ 700 g/t and 2# oil 50 ~ 80 g/t; Scan for the first time operation and add vulcanized sodium 800 ~ 1200 g/t and octadecylamine 150 ~ 250 g/t; Scan for the second time operation and add octadecylamine 50 ~ 150 g/t; Whole zinc oxide floatation process keeps pH values of pulp=11 ~ 12, output zinc oxide concentrate product.

2. a kind of complicated difficult dressing zinc oxide ore ore-dressing technique according to claim 1, is characterized in that, terpenic oil or chemistry oil for described 2# grease separation.

3. a kind of complicated difficult dressing zinc oxide ore ore-dressing technique according to claim 1, is characterized in that, described lead-zinc grade is: Pb 1.21-3.55%, Zn 6.04-7.78%, Lead oxidation rate 71.01-76.38%, zinc oxygenation efficiency 70.14-77.13%.