Process and device for continuous ultrasound desulfurization of scrapped lead paste

Abstract

The invention relates to a process and a device for continuous ultrasound desulfurization of scrapped lead paste. The process for continuous ultrasound desulfurization of scrapped lead paste comprises the following steps: (1) sodium carbonate or ammonium carbonate is selected as desulfurizing agent, and the desulfurizing agent and the scrapped lead paste are taken according to the mole ratio (1.2 to 2.2:1) of the Na iron or the (NH4)2 iron in the desulfurizing agent to the S iron in the scrapped lead paste; (2) the scrapped lead paste, the desulfurizing agent and water are prepared into flowing pulp with solid-liquid (S / L) weight ratio being equal to 3 / 5 to 4 / 5 in a pulping tank; (3) under the condition of ultrasonic wave, the flowing pulp enters a first reaction chamber for heating and stirring from the lower end part in the first reaction chamber, is discharged out from an overflow opening at the upper end of the first reaction chamber, then enters a second reaction chamber for heating and stirring from the lower end part of the second reaction chamber and finally, and is discharged out from a discharging opening at the upper end of an nth (ranging from 3 to 12) reaction chamber after sequent flow for reaction and discharge. The process has the advantages of low cost, small occupied area, continuous production and high efficiency.

Description

technical field [0001] The invention belongs to the technical field of waste lead-acid battery treatment, and in particular relates to a waste lead paste desulfurization process and a device thereof. Background technique [0002] At present, with the substantial increase in the production and use of automobiles, the waste of lead-acid batteries for automobiles has gradually become a source of solid waste that seriously threatens and affects the environment. At the same time, useful metals in waste lead-acid batteries, especially lead metals in large quantities, are also an important resource. Focusing on protecting the environment and fully recycling resources, many technologies have been produced for how to deal with solid waste lead-acid batteries. Among them, there are mainly methods such as fire method, wet method and combination of fire method and wet method. Because there is sulfuric acid in all waste lead-acid batteries, so these methods generally all will carry out...

AI Technical Summary

Problems solved by technology

Otherwise, it is difficult to keep the solid-phase material in a suspended state all the time. Once the lead-containing substance precipitates, the reaction environment will be relatively deteriorated. If you want to resuspend it, the power consumption will be greater, and the final result will be an increase in energy consumption.

The concentration of materials and reaction conditions in the reaction system are constantly changing, and it is easy to form local differences, which will deteriorate the operation process and control indicators, and even make the results difficult to meet the requirements.

In addition, the quality of each batch of products in the batch method cannot be kept consistent, resulting in the need to continuously adjust the control conditions of the subsequent processing procedures and affect the stability of the operation process.

The final direct result is that the energy consumption will inevitably be higher, and the product quality will be different or even deteriorated.

The batch method also has the disadvantages of large equipment volume, large floor area, and relatively high investment; the effective working time of the equipment is short, and the main time is spent in the process of feeding, washing the kettle, and adjusting, and the production efficiency is low.

Furthermore, the operating environment of the batch method is generally poor, and the labor intensity is relatively high.

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