System for neutralizing treatment of demoulding waste liquor and anodic oxidation waste liquor and recovery of aluminum ions of aluminum processing plant

Abstract

The invention discloses a system for neutralizing treatment of demoulding waste liquor and anodic oxidation waste liquor and recovery of aluminum ions of an aluminum processing plant. The system comprises an alkaline system, an acidic system, a neutralizing system, a pneumatic agitating system and a filter press and packaging system, wherein the alkaline system and the acidic system are respectively connected to the neutralizing system through pipelines; the pneumatic agitating system is arranged in the neutralizing system; the filter press and packaging system is arranged at the back of the neutralizing system through a pipeline; and another pipeline connected with a wastewater tank is arranged on the filter press and packaging system. The alkaline system is composed of a No 1 demoulding waste liquor tank, a No 2 demoulding waste liquor tank, a No 1 pump and pipelines. The neutralizing system is composed of a No 1 neutralizing tank, a No 2 neutralizing tank and pipelines. According to the system, oxidization waste liquor and demoulding waste liquor of the aluminum processing plant are conveyed to a neutralizing tank to be subjected to complete harmless treatment within pH (Potential of Hydrogen) of 6 to 8; a large amount of aluminium hydroxide byproducts can be recovered; and the cost of treating waste liquor can be greatly decreased.

Description

technical field [0001] The invention relates to a process for neutralizing aluminum alloy processing waste liquid and recovering metal aluminum, and belongs to the field of aluminum processing. Background technique [0002] The potting liquid refers to the lye used for demolding the aluminum head of the extruded abrasive tool. When slotting, the concentration of NaOH in the potting liquid is between 300-400g / L. With the increase of the potting modulus, the concentration of aluminum ions rises, and the potting speed keeps decreasing. When the aluminum ion reaches 60-70g / L, the potting If it is too slow, the tank needs to be poured and waste liquid is formed. Taking an aluminum factory with an annual output of 200,000 tons as an example, the amount of mold waste liquid is 10,000 tons, and the amount of dissolved aluminum is more than 650 tons. The potential economic value is very large. At present, aluminum processing enterprises have not only failed to take advantage of its...

AI Technical Summary

Problems solved by technology

[0008] To sum up, in modern aluminum processing enterprises, there is a large amount of mold-burning waste liquid and anodic oxidation waste liquid that need to be treated urgently, and the current treatment methods: one is to directly discharge it into the wastewater treatment center, which not only increases the treatment cost, but also wastes aluminum resources; The second is to ask a professional processing factory to take it away, and these processing plants need to consume a large amount of acid if they process a large amount of mold-burning waste lye individually; Expensive processing costs for this

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