A method and device for recovering zinc by leaching blast furnace gas ash by multi-ligand complex coordination ammonia method

A blast furnace gas ash and multi-ligand technology, applied in the field of hydrometallurgy, can solve the problems of poor economic feasibility, short kiln lining life, high coke consumption rate, etc., achieve high effective utilization of resources, widen research scope, operation Simple and convenient effects

Inactive Publication Date: 2017-01-04
KUNMING UNIV OF SCI & TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned traditional treatment methods all belong to the fire method for recovering zinc, and the calorific value of the furnace charge is required to be high. At present, most domestic enterprises have a calorific value of more than 2,000 kcal / kg for the furnace charge, and the operation rate is low. The service life of the kiln lining is short and the comprehensive energy consumption High, small processing capacity, large investment, high coke consumption rate, high energy consumption such as tailings containing zinc and high carbon, especially for the disposal and utilization of low-grade materials, the economic feasibility is poor
In addition, a long rotary kiln is used to process mixed pellets or dust. If the zinc in the dust is to be directly recovered, a second-stage rotary kiln is required. The zinc-containing steam enters the second rotary kiln for reprocessing. The equipment is huge, the efficiency is low, and it is easy to produce Loop phenomenon

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method and device for recovering zinc by leaching blast furnace gas ash by multi-ligand complex coordination ammonia method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The multi-ligand complex coordination ammonia method for leaching blast furnace gas ash to recover zinc has the following specific steps:

[0027] Step 1, first mix sodium citrate and sodium tartrate according to a molar ratio of 1:1 to obtain a complex mixture;

[0028] Step 2. Add the compounding mixture to the pure water so that the concentration of sodium citrate and sodium tartrate in the compounding mixture is 0.2 mol / L and 0.2 mol / L. After stirring evenly, add ammonia solution and sulfuric acid in a molar ratio of 1:1 Ammonium, mixed evenly to form a coordination leaching agent, control the total ammonia concentration in the coordination leaching agent to 7mol / L, then add the blast furnace gas ash and the coordination leaching agent to the reaction vessel successively according to the solid-liquid ratio of 1:5g / ml Leaching, during the leaching process, the reaction temperature is controlled at 30°C, the stirring speed is 300r / min, and the leaching is performed fo...

Embodiment 2

[0034] The multi-ligand complex coordination ammonia method for leaching blast furnace gas ash to recover zinc has the following specific steps:

[0035] Step 1, first mix ammonium citrate and tartaric acid according to the molar ratio of 3.5:2 to obtain a complex mixture;

[0036] Step 2. Add the compound mixture to the pure water, so that the concentration of ammonium citrate in the compound mixture is 0.35mol / L, and the concentration of tartaric acid is 0.2mol / L. After stirring evenly, add ammonia solution and ammonium sulfate with a molar ratio of 10:1. , form a coordination leaching agent after mixing evenly, control the total ammonia concentration in the coordination leaching agent to 7mol / L, then add the blast furnace gas ash and the coordination leaching agent to the reaction vessel successively for leaching according to the solid-to-liquid ratio of 1:5, and leaching The process controls the reaction temperature to be 30°C, the stirring speed to be 300r / min, and leachi...

Embodiment 3

[0042] The multi-ligand complex coordination ammonia method for leaching blast furnace gas ash to recover zinc has the following specific steps:

[0043] Step 1. First, mix citric acid and tartaric acid according to a molar ratio of 5.5:2 to obtain a complex mixture;

[0044] Step 2. Add the compound mixture to the pure water, so that the concentration of ammonium citrate in the compound mixture is 0.55mol / L, and the concentration of tartaric acid is 0.2mol / L. After stirring evenly, add ammonia solution and ammonium sulfate with a molar ratio of 5:1. , form a coordination leaching agent after mixing evenly, control the total ammonia concentration in the coordination leaching agent to be 7mol / L, then add the blast furnace gas ash and the coordination leaching agent to the reaction vessel successively for leaching according to the solid-to-liquid ratio of 1:5, and leaching The process controls the reaction temperature to be 30°C, the stirring speed to be 300r / min, and leaching f...

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 relates to a method for leaching and recovering zinc from blast furnace dust by a multi-ligand composite coordination ammonia process and a device thereof belong to the technical field of hydrometallurgy. The method provided by the invention comprises the following steps: firstly uniformly mixing a coordination agent selected from citric acid or citrate and a coordination agent selected from tartaric acid or tartrate so as to obtain a coordination mixture; and adding the coordination mixture into pure water, uniformly stirring, successively adding an ammonia-water solution and ammonium sulfate, uniformly mixing to form a coordination leaching agent, controlling the total ammonia concentration of the coordination leaching agent to 0-10 mol / L, leaching under a relatively sealing condition by successively adding blast furnace dust and the coordination leaching agent according to the solid-to-liquid ratio of 1:1-10g / ml into a reaction vessel so as to obtain a zinc leachate. During the leaching process, reaction temperature is controlled to 25-80 DEG C, stirring speed is 100r / min-600r / min, and leaching time is 1.5h-3h. According to the method, zinc is leached out of ferrous metallurgy zinc-containing blast furnace dust by a multi-ligand composite coordination ammonia process, but other impurities are nonsoluble.

Description

technical field [0001] The invention relates to a method and a device for recovering zinc from blast furnace gas ash by a multi-ligand compound coordination ammonia method and belongs to the technical field of hydrometallurgy. Background technique [0002] In addition to zinc mineral resources, zinc-containing slag dust and other metallurgical slag dust are also extremely important available resources in my country, mainly zinc-containing gas mud and gas ash produced in the blast furnace smelting process, zinc-containing smoke dust produced in the electric arc furnace smelting process, and lead smelting. Zinc-containing fume and zinc hydrometallurgy slag after slag volatilization. my country is the world's largest steel producer, with an annual output of more than 500 million tons of steel. According to statistics, every ton of steel produced produces 10-15kg of zinc-containing blast furnace gas mud, and the annual by-product of gas ash is about 5-7 million tons, containing ...

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
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/30C21B3/04
CPCY02P10/20Y02W30/50
Inventor 张利波马爱元李世伟彭金辉夏洪应巨少华杨坤郑雪梅
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap