Combined long-term stable operation ammonium chloride method zinc electrolysis process flow

A technology with a process flow and stable operation, applied in the electrolysis process, photography process, electrolysis components, etc., can solve the problems of incomplete system, unsuitable equipment, large consumption of zinc powder, etc.

A technology with a process flow and stable operation, applied in the electrolysis process, photography process, electrolysis components, etc., can solve the problems of incomplete system, unsuitable equipment, large consumption of zinc powder, etc.

CN112853399AInactive Publication Date: 2021-05-28彭勃 +1
0 Cites 0 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Combined long-term stable operation ammonium chloride method zinc electrolysis process flow

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Example 1. Direct leaching of raw materials

[0023] The raw material is secondary zinc oxide, containing 41% zinc, 4% lead, and 4% fluorine and chlorine. The raw material is sent to the leaching tank after a screw feeder or pulping at a speed of 4.5 tons / hour, and is subjected to countercurrent washing and leaching. The leaching liquid-solid ratio is 8-12:1, the leaching liquid contains ammonium chloride 4.5-5.5mol / l, the temperature is 30-90 degrees, stirred, the leaching time is 2 hours, the leaching liquid contains more than 37g / l of zinc, 3.6g / l of lead, and others Copper 0.05g / l, cadmium 0.3g / l, iron trace;

example 2

[0024] Example 2, leaching after rough washing of ultra-impurity raw materials

[0025] Small ash: 61% zinc, 5% iron, 15.5% fluorine and chlorine, sent to coarse cycle washing and pressure filtration, 62.2% zinc, 5.4% iron, less than 6% fluorine and chlorine, sent to leaching;

example 3

[0026] Example 3. Combined purification of leaching solution

[0027] Leaching solution: zinc 37g / l, lead 5g / l, trace iron, other copper 0.05, cadmium 0.3, two-stage coarse purification of zinc scum, one-stage deep purification of zinc powder, one-stage mixed liquid supplementation of ammonia and then purified liquid, Zinc 38g / l, lead 0.008, copper 0.003, cadmium 0.006, other trace amounts.

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

No PUM Login to View More

Abstract

The invention provides a combined long-term stable operation ammonium chloride method zinc electrolysis process flow. The flow comprises leaching, purification, an electrolysis main flow and an ultra-impurity raw material circulation coarse washing, excessive calcium and magnesium precipitation and oxidation impurity filtration auxiliary flow, and the two flows are arranged and connected in parallel, can work independently and do not influence each other. According to the flow, the stability of the quality of an electrolyte is controlled through the cooperation of main and auxiliary flows and through the whole flow, temperature control, compact parallel-series layout, multiple working sections, synchronization / asynchronism and multiple means, the multi-element interference brought by complex raw materials is solved, especially the problem of long-period stable and efficient operation of ammonium chloride method zinc electrolysis is solved, and the flow has positive environmental protection and economic significance in treatment of high-fluorine-chlorine and high-impurity zinc-containing raw materials through an ammonia method, and environmental protection and resource recycling of secondary zinc resources such as zinc-containing steel, metallurgical smoke and the like.

Description

technical field [0001] The invention relates to a combined long-term stable operation of the ammonia-based electrolytic zinc process, in particular to a combination of process equipment and a process flow for the long-term stable operation of the ammonium chloride electrolytic zinc, which solves the problem of the current ammonium chloride electrolytic zinc process. The problems of operation, electrolytic efficiency degradation over time and failure, belong to the field of hydrometallurgy. Background technique [0002] The ammonium chloride electrolytic zinc technology is a very effective chlorine-containing ammonia electrolytic zinc technology, especially suitable for the treatment of zinc-containing iron and steel dust, electroplating small ash, blast furnace and non-ferrous metallurgical furnace dust rich in fluorine and chlorine, and high iron impurities. The secondary zinc oxide produced by the set, as well as the high iron high calcium magnesium zinc oxide. The ammoni...

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
28 May 2021
Publication
CN112853399A
IPC
C25C1/16; C25C7/00; C25C7/06; C25C7/08
CPC
C25C1/16; C25C7/00; C25C7/06; C25C7/08; Y02P10/20
Inventors
彭勃; 罗彦