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Method of Mechanochemical Coupling Ultrasonic Chemical Enhancement of Metal Leaching in Secondary Zinc Oxide Powder

A secondary zinc oxide and sonochemical technology, applied in chemical instruments and methods, chemical/physical/physicochemical processes, chemical/physical/physicochemical processes that apply energy, etc., can solve the problem of reducing the operating life of equipment and increasing the energy of production Consumption, uneven mixing of slurry and other problems, to achieve the effect of reducing the concentration of use, significant technical benefits, and low reaction energy consumption

Active Publication Date: 2020-12-11
GREENNOVO ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for mechanochemically coupled ultrasonic chemical strengthening of metal leaching in secondary zinc oxide powder, to solve the problem of increasing the leaching rate of metal in secondary zinc oxide powder and shortening the leaching time by adopting the method of increasing the acid concentration of the leach solution , will reduce the operating life of the equipment and indirectly increase the production cost; and when the stirring speed is increased to increase the metal leaching rate and shorten the leaching time in the secondary zinc oxide powder, it is often easy to cause uneven mixing of the slurry in the leaching process, and at the same time The problem of increasing the energy consumption of production

Method used

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  • Method of Mechanochemical Coupling Ultrasonic Chemical Enhancement of Metal Leaching in Secondary Zinc Oxide Powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Using 1.0 g secondary zinc oxide powder as the reaction raw material, the primary zinc oxide powder was firstly subjected to mechanochemical activation reaction in the ball mill tank of the ball mill. The ball milling speed was 400 rpm, the ball milling time was 1.0 h, and the ball-to-material ratio was 40:1. The secondary zinc oxide powder after the mechanochemical activation reaction is taken out from the ball mill tank, and the secondary zinc oxide powder is leached in an acidic leaching solution, and the pH value of the acidic leaching solution is set to 4.5. During the leaching process, the reaction power of the ultrasonic instrument was 25 kHz, the leaching time was 5.0 min, and the reaction temperature was 25 degrees at room temperature. The content of elements in the obtained leaching solution was measured by full-spectrum direct-reading plasma emission spectrometry, and the leaching efficiencies of zinc, iron, cobalt and nickel can reach 95.4%, 92.7%, 93.1% and ...

Embodiment 2

[0035] Using 1.0 g secondary zinc oxide powder as the reaction raw material, the primary zinc oxide powder was first subjected to mechanochemical activation reaction in the ball mill tank, the ball milling speed was 500 rpm, the ball milling time was 2.0 h, and the ball-to-material ratio was 50:1. The secondary zinc oxide powder after the mechanochemical activation reaction is taken out from the ball mill tank, and the secondary zinc oxide powder is leached in an acidic leaching solution, and the pH value of the acidic leaching solution is set to 5.0. During the leaching process, the acidic leaching solution was placed in ultrasonic instruments of different powers to investigate the improvement efficiency of mechanochemical activation reaction coupling ultrasonic chemistry on metal leaching from secondary zinc oxide powder. The reaction power of the ultrasonic equipment is 35 kHz, the leaching time is 3.0 min, and the reaction temperature is 25 degrees at room temperature. The...

Embodiment 3

[0037]Using 1.0 g of secondary zinc oxide powder as the reaction raw material, the secondary zinc oxide powder was firstly subjected to mechanochemical activation reaction in the ball mill tank of the ball mill. The ball milling speed was 600 rpm, the ball milling time was 3.0 h, and the ball-to-material ratio was 60:1. The secondary zinc oxide powder after the mechanochemical activation reaction is taken out from the ball mill tank, and the secondary zinc oxide powder is leached in an acidic leaching solution, and the pH value of the acidic leaching solution is set to 5.5. During the leaching process, the acidic leaching solution was placed in ultrasonic instruments of different powers to investigate the improvement efficiency of mechanochemical activation reaction coupling ultrasonic chemistry on metal leaching from secondary zinc oxide powder. The reaction power of the ultrasonic equipment is 40 kHz, the leaching time is 1.0 min, and the reaction temperature is 18 degrees. ...

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Abstract

The invention discloses a method for mechanochemical coupling ultrasonic chemical strengthening of metal leaching in secondary zinc oxide powder, comprising: mechanical activation: mechanically activating raw materials containing secondary zinc oxide powder to obtain an activation material; ultrasonic treatment: combining the activation material with the The acidic leaching solution is mixed to obtain a mixture, and the mixture is subjected to ultrasonic treatment, and the obtained liquid phase is the leachate. The combination of mechanochemical activation and sonochemistry enhanced the leaching rate and leaching rate of multi-metals through structural destruction and cavitation of secondary zinc oxide powder. This process can indirectly reduce the use concentration of acidic leaching solution and shorten the leaching time. In actual production, the specific application of this process can reduce the anti-corrosion cost and operating production cost of reaction equipment, and indirectly produce good production benefits.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment and resource utilization, in particular to a method for mechanochemical coupling ultrasonic chemical strengthening of metal leaching from secondary zinc oxide powder. Background technique [0002] In the process of blast furnace iron and steel smelting, metal impurities such as zinc and lead contained in iron ore are reduced by reducing agents such as coke under high temperature conditions to form saturated steam of simple metals, fine dust such as iron ore, coke and high-temperature auxiliary flux , was carried out of the furnace by blast furnace gas, and became the main solid waste of the iron and steel industry: blast furnace ironmaking fumes (gas ash or gas mud). The iron and steel output of my country's iron and steel smelting plants is increasing day by day, which promotes the take-off of my country's economy, but on the other hand, these industrial solid wastes prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B3/06
CPCC22B3/08C22B3/06Y02P10/20C22B7/02C22B7/005C22B7/007B01J19/10B01J19/008B01J19/0066B01J19/0013B01J19/0086
Inventor 马黎阳李金惠张武刘康张云学李春林白如斌皇贵生
Owner GREENNOVO ENVIRONMENTAL TECH CO LTD
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