Method for cooperatively recycling copper slag and sodium sulfate waste residues

A sodium sulfate and recycling technology, applied in the direction of silicon oxide, silicon dioxide, process efficiency improvement, etc., can solve the problems of bulk consumption and processing difficulties, high site requirements, easy water absorption and deliquescence, etc., and achieve technical operability Strong, heavy metal grade improvement, low cost effect

Active Publication Date: 2019-09-27
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Hao Shufeng et al. used pure low-modulus water glass as the silicon source, and Na 2 SO 4 White carbon black is prepared for stabilizers, etc.; CN102234116A reports the use of iron tailings to prepare white carbon black. This method only recovers silicon resources and has certain requirements for raw materials. The silicon source is iron tailings with high-grade silicon content , poor adaptability
[0004] Glauber's salt (Na 2 SO 4 ) As a common industrial by-product, it is produced in large quantities from the industrial production process of chemical industry and metallurgy. Because it is easily soluble in water, a large amount of storage has high requirements on the site, and its stability is poor. It is easy to absorb water and deliquescent. difficulty

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  • Method for cooperatively recycling copper slag and sodium sulfate waste residues
  • Method for cooperatively recycling copper slag and sodium sulfate waste residues
  • Method for cooperatively recycling copper slag and sodium sulfate waste residues

Examples

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Embodiment 1

[0047] First, weigh 1 kg of copper slag ball mill and pass it through a 200-mesh sieve, mix it with sodium sulfate waste slag at a mass ratio of 1:1, and keep it warm for 120 minutes in a CO atmosphere at 1000°C; Magnetic separator, magnetic separation under 1200G field strength, to obtain iron powder, iron powder XRD analysis see image 3 . Pour the magnetic separation tailings into 1.5L water and stir for a certain period of time before filtering; obtain about 1.2L filtrate and age at a constant temperature for 720min at 50°C, then heat up to 80°C in a water bath; while stirring, add 120mL of 10wt% dispersant NaCl, 120ml concentration is 70wt% surfactant n-butanol; While stirring the obtained solution, add sulfuric acid with a concentration of 5wt% dropwise, adjust the pH value to 8-9, keep 80°C for constant temperature aging for 180min and then filter; filter residue with deionized Wash and filter with water for 6 times, and then dry at 100°C to obtain white carbon black. ...

Embodiment 2

[0049] First, weigh 1 kg of copper slag ball mill and pass it through a 200-mesh sieve, mix it with sodium sulfate waste slag at a mass ratio of 2:1, and keep it warm at 900°C for 60 minutes in natural gas; Separator, conduct magnetic separation under 1200G field strength to obtain iron powder, pour the magnetic separation tailings into 1.5L water and stir for a certain period of time, then filter; obtain about 1.2L filtrate, age at a constant temperature of 60°C for 900min, and then heat up to 70°C in a water bath ℃; while stirring, adding 120ml concentration of 15wt% dispersant NaCl and 100ml concentration of 80wt% surfactant n-butanol respectively; while stirring the gained solution, adding concentration dropwise is 10wt% sulfuric acid to adjust the pH value to 8~ 9. Keep aging at a constant temperature of 50°C for 240 minutes and then filter; wash the filter residue with deionized water repeatedly-filter 5 times, and then dry the filter residue at 90°C to obtain white carbo...

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Abstract

The invention discloses a method for cooperatively recycling copper slag and sodium sulfate waste residues. The method comprises the following steps of (1) mixing the copper slag with the sodium sulfate waste residue, and roasting in a reducing atmosphere; (2) carrying out ball milling and sieving on the roasted product, and then carrying out magnetic separation; (3) mixing and stirring magnetic separation tailings with water, filtering to obtain filter residues and filtrate, aging the filtrate, adding a dispersing agent and a surfactant, and adding an acid to react to obtain white carbon black. According to the method, sodium sulfate waste residue is used as a roasting additive, sodium sulfide is formed under the reduction condition, iron oxide is reduced to metal iron, and the iron oxide is recycled after being sorted; the sodium sulfide is used as a fixing agent for the valuable metals, meanwhile, reacts with silicate in the copper slag to form sodium silicate, and is used as a raw material for preparing white carbon black, and the resource utilization of silicon is realized while the iron recovery in the copper slag is realized.

Description

technical field [0001] The invention belongs to the intersection field of metallurgical engineering and environmental engineering, and relates to a method for synergistic resource utilization of copper slag and sodium sulfate waste slag. Background technique [0002] With the rapid development of the nonferrous metallurgy industry, the resource and environmental problems faced by the industry have become increasingly prominent, which has become the lifeline of my country's nonferrous metallurgical enterprises. Metal copper smelting is a major branch of non-ferrous smelting. Although the solid waste generated in the smelting process is a kind of pollutant, it is also an important secondary resource. Its effective treatment is the key to solving the problem of resource environmental protection in my country's non-ferrous metallurgy industry. one. For every 1 ton of refined copper produced, about 2 to 3 tons of slag will be produced. my country's copper smelting enterprises pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B1/02C01B33/12
CPCC01B33/12C22B1/02C22B7/001C22B7/04Y02P10/20
Inventor 彭宁王云燕徐慧王功亮罗永健王忠兵刘德刚赵宗文闵小波
Owner CENT SOUTH UNIV
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