Method for treating arsenic in waste smelting acid by using copper slag

A technology of copper slag and dirty acid, applied in water/sewage treatment, metallurgical wastewater treatment, chemical instruments and methods, etc., can solve the problems of toxic elements polluting the environment, difficult to stockpile, difficult to recycle, etc., to achieve simple operation process, Low economic cost, good arsenic removal effect

Inactive Publication Date: 2019-03-29
KUNMING UNIV OF SCI & TECH
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are various valuable metals such as Fe, Cu and Ni in copper slag and a small amount of precious metals such as Au and Ag, among which the main minerals are iron silicate and magnetic iron oxide, and the grade of iron is generally more than 40%, much higher than 29. The average industrial grade of 1% iron ore, but the utilization rate of iron in copper slag is less than 1%
[0003] Aiming at the treatment method of polluted acid, the sulfidation precipitation-neutralization precipitation process is widely used at present, which has many short

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
  • Method for treating arsenic in waste smelting acid by using copper slag
  • Method for treating arsenic in waste smelting acid by using copper slag
  • Method for treating arsenic in waste smelting acid by using copper slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the method of this copper slag processing non-ferrous smelting dirty acid is as follows:

[0023] 1. Carry out dry copper slag (see Table 1 for copper slag composition) by ball milling and magnetic separation (the speed of the ball mill is 760r / min, the grinding time is 11min, and the magnetic separation intensity of the magnetic separator is 800mT) to obtain iron-rich copper slag and other Impurities; other impurities are stockpiled and processed, and the iron-rich copper slag is pretreated at 800°C for 6 hours;

[0024] Table 1

[0025] ;

[0026] 2. Water-quench the high-temperature iron-rich copper slag with high-speed water injection. The flow rate of high-speed water is 14m / s. After water-quenching, the copper slag is dried and ground, and the particle size of the copper slag is controlled below 200 mesh;

[0027] 3. Press H 2 o 2 With a molar ratio of 1.2:1 to arsenic, the H 2 o 2 Mix it with dirty acid (the dirty acid comes from the sulfuri...

Embodiment 2

[0033] Embodiment 2: the method of this copper slag processing non-ferrous smelting dirty acid is as follows:

[0034] 1. Ball mill and magnetically separate the dried copper slag (composition of the copper slag is shown in Table 1) (the speed of the ball mill is 910r / min, the grinding time is 8min, and the magnetic separation intensity of the magnetic separator is 1000mT) to obtain iron-rich copper slag and other impurities ; Other impurities are stockpiled and treated, and the iron-rich copper slag is pretreated at a temperature of 500 ° C for 8 hours;

[0035] Table 1

[0036]

[0037] 2. Water-quench the high-temperature iron-rich copper slag with high-speed water injection. The flow rate of high-speed water is 12m / s. After water-quenching, the copper slag is dried and ground, and the particle size of the copper slag is controlled below 200 mesh;

[0038] 3. Press H 2 o 2 With a molar ratio of 1:1 to arsenic, the H 2 o 2 Mix it with dirty acid (the dirty acid comes...

Embodiment 3

[0044] Embodiment 3: the method of this copper slag processing non-ferrous smelting dirty acid is as follows:

[0045] 1. The dry copper slag (composition of the copper slag is shown in Table 1) is subjected to ball milling and magnetic separation (the speed of the ball mill is 800r / min, the grinding time is 9min, and the magnetic separation intensity of the magnetic separator is 900mT) to obtain iron-rich copper slag and other Impurities; other impurities are stockpiled and processed, and the iron-rich copper slag is pretreated at 650°C for 7 hours;

[0046] Table 1

[0047]

[0048] 2. Water-quench the high-temperature iron-rich copper slag with high-speed water injection. The flow rate of high-speed water is 11m / s. After water-quenching, the copper slag is dried and ground, and the particle size of the copper slag is controlled below 200 mesh;

[0049] 3. Press H 2 o 2 With a molar ratio of 1.1:1 to arsenic, the H 2 o 2 Mix it with dirty acid (the dirty acid comes 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 discloses a method for treating arsenic in waste smelting acid by using copper slag, and belongs to the field of heavy metal pollution treatment and metallurgical solid waste utilization. The method includes firstly subjecting the copper slag to drying, ball milling and magnetic separation to obtain iron-rich copper slag and other impurities; subjecting the iron-rich copper slag to high-temperature pretreatment at 500-800 DEG C; subjecting the high-temperature iron-rich copper slag to water quenching through high-speed water blowing; then drying and grinding the copper slag afterwater quenching; adding H2O2 into waste acid and mixing to perform oxidation pretreatment at 60-80 DEG C; then adding the copper slag into the waste acid after oxidation pretreatment; performing an arsenic removing reaction at atmospheric pressure under stirring; and finally performing solid liquid separation. The method achieves arsenic removal with cheap copper slag, reduces sludge storage volume in the process of waste acid treatment when compared with a traditional arsenic removal process, and achieves an effect of treating waste with a waste material. The method has characteristics of simple process operation, a low production cost and a wide market prospect.

Description

technical field [0001] The invention relates to a method for treating arsenic in non-ferrous smelting sewage acid with copper slag, belonging to the fields of heavy metal pollution control and metallurgical solid waste utilization. Background technique [0002] my country is a major copper producer in the world. The annual discharge of copper slag exceeds 10 million tons. At present, the stock of copper slag in the country exceeds 120 million tons. Copper slag has become a large amount of industrial solid waste generated in the metallurgical industry. There are various valuable metals such as Fe, Cu and Ni in copper slag and a small amount of precious metals such as Au and Ag, among which the main minerals are iron silicate and magnetic iron oxide, and the grade of iron is generally more than 40%, much higher than 29. The average industrial grade of iron ore is 1%, but the iron utilization rate in copper slag is less than 1%. Therefore, effectively realizing the comprehensi...

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
IPC IPC(8): C02F1/72C02F1/66C02F101/10C02F103/16
CPCC02F1/66C02F1/722C02F2101/103C02F2103/16
Inventor 祁先进李永奎祝星王华郝峰焱李孔斋魏永刚胡建杭
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