Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method of using gypsum slag to strengthen recovery of valuable metals in copper smelting slag

A valuable metal and smelting slag technology, which is applied in chemical engineering, industrial solid waste resource utilization, and metallurgical engineering, can solve the problems of low metal comprehensive recovery rate, long preparation process, and increased slag viscosity, and achieve valuable metal The recovery rate is high, the process is simple and easy to realize, and the effect of reducing energy consumption

Active Publication Date: 2021-09-03
CENT SOUTH UNIV
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Production practice and scientific research show that the production of high-grade matte will lead to slag containing Fe 3 o 4 On the high side, the viscosity of slag increases, the separation conditions of matte and slag become worse, and the copper content in slag increases
[0007] CN101491789A discloses the beneficiation process of flash furnace, converter and depleted electric furnace three kinds of copper smelting process mixed rolling, adopts beneficiation method to recover copper in the mixed slag, but it is found that the recovery of valuable metals in oxidation state is difficult, and the comprehensive recovery rate of metals is low
However, the cost of this process is relatively high, and more copper is lost with the electric furnace slag
CN104404259A is an improvement on the depletion process of ordinary electric furnaces, and discloses a method for recovering valuable metals through co-processing of copper-nickel-cobalt smelting slag and gypsum slag. 2 The reducing agent, gypsum slag and flux are injected into the depleted electric furnace, and after standing in a constant temperature range, the valuable metals are recovered from the matte phase, and the depleted slag is water-quenched as cement raw material. This method increases the sulfur content of the slag through gypsum. content, which is conducive to the transformation of copper in slag into matte, but this method has high energy consumption, high residual Cu content in slag, and the comprehensive metal recovery rate is lower than that of the slow cooling-flotation process, and the materials are complex and the preparation process is long. Need to rely on depleted electric furnace, limited application and other defects

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 of using gypsum slag to strengthen recovery of valuable metals in copper smelting slag
  • A method of using gypsum slag to strengthen recovery of valuable metals in copper smelting slag
  • A method of using gypsum slag to strengthen recovery of valuable metals in copper smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Gypsum slag utilizing the present invention, enhanced recovery method of copper smelting slag with a divalent metal, comprising the steps of:

[0064] (1) A gypsum slag with a reducing agent B were mixed granulated mass ratio of 5, to control particle size of about 1mm, pellets drying stand.

[0065] (2) N 2 Atmosphere to a temperature of melting the slag 20g A 1250 ℃ was added 2g pellets, controlled cooling rate after 4 ℃ / min slow cooling to room temperature, i.e., slag-obtained.

[0066] Since the present embodiment is a laboratory, and A smelting slag is cooled the slag taken from the factory, it is necessary to 20g A smelting slag in N 2 Melting atmosphere at 1250 deg.] C; in the actual process, copper slag smelting process industrially produced slag itself is the melting temperature, the temperature is generally 1180 ~ 1320 ℃, so that no further heat can be directly processed, and is usually 20 ~ 50t of dross, slag inside the natural oxygen-free environment, using th...

Embodiment 2

[0072] Gypsum slag utilizing the present invention, enhanced recovery method of copper smelting slag with a divalent metal, comprising the steps of:

[0073] (1) gypsum slag with a reducing agent A B mass ratio of 3:1 kneading tableting, tableting pressure of 2Mpa.

[0074] (2) Take 20g B in slag smelting N 2 Atmosphere, was heated to 1200 deg.] C, 3g of plaster sheeting, slowly cooled to room temperature, controlling the cooling rate of 10 ℃ / min, to give the slow cooling slag.

[0075] The resulting sample Figure 4 Shown completely melted slag and iron is deposited at the bottom of the crucible, loose surface structure of the sample produced by the reaction CO 2 And other gases escape formed. Original sample and slowly cooled slag directly detected by XRD Example 2 resulting slag-embodiment, the results obtained Figure 5 , The metallographic sample preparation the samples were analyzed by SEM, the results obtained Image 6 Indicated.

[0076] Figure 5 The XRD detection results sh...

Embodiment 3

[0079] A method of using gypsum slag to reagent in recovery of copper mesencing slums in the use of plasma slag, including the following steps:

[0080] (1) Powering the gypsum slag B and the reducing agent B in mass ratio of 1: 1, the ball is 2 mm.

[0081] (2) Take 20G Solution 14 in N 2 The atmosphere was warmed to 1250 ° C, add 4 g of the ball, slowly cooled to room temperature, and the cooling rate was 2 ° C / min, that is, the cold slag was obtained.

[0082] The sample Figure 7 As shown, the slag is completely melted and deposited at the bottom of the cast iron, and the sample surface loose structure is generated by the reaction. 2 Waiting for gas escape. The original slag direct cache sample and the cache residue obtained from Example 3 were subjected to XRD detection. Figure 8 As shown, the sample is metapped by the sample, and the results are analyzed by SEM. Figure 9 Indicated.

[0083] Figure 8 The XRD detection result shows that CASO is not detected by a slow-cooled ...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for using gypsum slag to strengthen the recovery of valuable metals in copper smelting slag, comprising the following steps: (1) mixing the gypsum slag and a carbonaceous reducing agent uniformly, and granulating or tableting to obtain mixed granules or mixed flakes; (2) adding the obtained mixed pellets or mixed flakes into the high-temperature copper smelting slag; (3) slowly cooling the mixture obtained in step (2) to obtain slow cooling slag. Compared with the existing process, the method of the invention not only has low energy consumption, but also has high metal recovery rate, low cost, simple process, simple material, easy industrial application, and has high industrial application prospect and value.

Description

Technical field [0001] The present invention belongs to metallurgy engineering, chemical engineering and industrial solid waste resource utilization technology, and is related to a method of re-recovering a coated coil melting slag in a copper melting score. Background technique [0002] The fire-making brown generally contains the influenza smelting, ice copper blowing, anode refining and anode casting, and an anode plate for outputting the refined refining. The process will generate a smelting slag equivalent to 3 to 4 times the quality of metal copper, mainly by Fe x O, SIO 2 , Cao, Mgo, Zno, Al 2 O 3 The oxide components consist of while containing a small amount of Cu, Ni, Ag and other valuable metals and harmful elements such as AS, PB. Blowing the slag and fire-making refining slag typically contains high copper, but the volume is small and can be used as a return treatment. [0003] Smelting slabs is the largest smelting slag of the copper smelter. It is also the main way...

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): C22B7/04C22B15/00
CPCC22B7/001C22B7/04C22B15/0054Y02P10/20
Inventor 夏隆巩刘志宏陈睿曹舒恒张怡旺俞峰叶树枫
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com