A method for recovering aluminum from sludge in an aluminum profile factory
A recycling method and aluminum profile factory technology, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low purity of aluminum hydroxide and high impurity content, and reduce enterprise operating costs , The process steps are simple, and the effect of improving the utilization rate
Active Publication Date: 2021-05-07
KEDA INDUSTRIAL GROUP CO LTD
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Problems solved by technology
[0005] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a method for recovering aluminum in the sludge of an aluminum profile factory, so as to solve the problem that the purity of aluminum hydroxide prepared by recycling aluminum from the aluminum-containing sludge of an aluminum profile factory in the prior art is relatively low, The problem of high impurity content and can reduce the amount of solid waste
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[0026] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples, but the protection scope of the present invention is not limited to the following specific examples.
[0027] refer to figure 1 , the present embodiment discloses a recovery method of aluminum in the sludge of an aluminum profile factory, and the recovery method comprises the following steps:
[0028] (1) Collect the waste sludge with a water content of 60-70% produced by the aluminum profile factory, and crush it to a fluffy waste residue; if there is solid sludge with a large hardness, it can be crushed with a crusher;
[0029] (2) Adding concentration to the waste residue is 3mol / L hydrochloric acid to dissolve, the addition of the hydrochloric acid needs to ensure that the waste residue can be submerged, and then soaked at room temperature for 30min to form a mixed soluti...
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The invention discloses a method for recovering aluminum in the sludge of an aluminum profile factory, which comprises the steps of sludge crushing, waste residue acidolysis, multiple filtration, impurity precipitation, washing and drying, etc., which improves the recovery rate of aluminum in the sludge and recovers The filter residue produced in the process can be prepared into bricks, cement, etc. for the building materials industry, further improving the utilization rate of sludge. The waste water generated in the process can meet the standard of reclaimed water reuse or be discharged after a little treatment, which has the advantages of energy saving and environmental protection. The invention has simple process steps, realizes resource recycling, reduces enterprise operating costs, and also solves the phenomenon that aluminum profile factory sludge is randomly piled up or buried to pollute the environment, and has achieved remarkable economic and ecological effects.
Description
technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method for recovering aluminum from the sludge of an aluminum profile factory. Background technique [0002] In large-scale aluminum profile processing plants, the concentration of aluminum ions in anodic oxidation waste liquid reaches 15-20g / L, far exceeding the optimal control concentration of 3-8g / L. The increase of aluminum ion concentration in actual production will affect the quality of oxide film and increase the energy consumption of oxidation. In view of this, aluminum profile processing manufacturers often use the method of pouring tanks, that is, pouring out part of the bath liquid to reduce the concentration of aluminum ions. With an annual output of 100,000 tons of aluminum profiles, the poured waste liquid is as high as 25,000 tons, of which the aluminum content is close to 550 tons, resulting in the loss of useful material aluminum. At the same time, wa...
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IPC IPC(8): C02F11/00C02F9/04C01F7/34
CPCC01F7/34C02F11/00C02F11/12C02F11/122
Inventor 张道福胡长淳韩澄光杨金周武桢邵俊杰
Owner KEDA INDUSTRIAL GROUP CO LTD