Freezing iron-removal recycling system and technology for waste sulfuric acid

A technology of iron recycling and waste sulfuric acid, applied in the direction of ferric sulfate, etc., can solve problems such as danger, and achieve the effect of solving collection, transportation and processing, saving social resources and production costs

Pending Publication Date: 2020-02-28
鹤山恒基钢丝制品有限公司
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Problems solved by technology

For this reason, the present invention proposes a waste sulfuric acid refrigeration and iron removal recycling system and process, which can reprocess and recycle waste acid, not only solve the problem of hazardous waste collection, transportation and treatment, but also greatly save social resources and production costs

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  • Freezing iron-removal recycling system and technology for waste sulfuric acid
  • Freezing iron-removal recycling system and technology for waste sulfuric acid

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Embodiment Construction

[0025] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation of the present invention.

[0026] In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be c...

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Abstract

The invention discloses a freezing iron-removal recycling system and technology for waste sulfuric acid. The freezing iron-removal recycling system comprises a sulfuric acid washing work tank, a wasteacid temporary storage tank, a waste acid freezing iron-removal device and a recovered acid temporary storage tank. The freezing iron-removal recycling method comprises the following steps that the surface of a steel wire base material is subjected to acid washing by using sulfuric acid; when the content of ferrous sulfate in the sulfuric acid obtained after acid washing is equal to or higher than 280 g/l, the sulfuric acid is discharged, cooled and precipitated; the cooled and precipitated sulfuric acid is cooled to 3 DEG C, ferrous sulfate crystals in the sulfuric acid are separated out, and the content of ferrous sulfate in the sulfuric acid is 110-120 g/l; the cooled sulfuric acid is naturally heated to the room temperature, new sulfuric acid and water are added, and acid liquid in which the content of sulfuric acid is 80-100 g/l and the content of ferrous sulfate is 90-100 g/l is prepared. The waste acid can be retreated and recycled, the problems about collection, transportationand treatment of hazardous wastes are solved, and social resources and production cost can be greatly saved.

Description

technical field [0001] The invention relates to the technical field of steel wire production and processing, in particular to a recycling system and process for freezing and removing iron from waste sulfuric acid. Background technique [0002] In the production process of steel wire, pickling is a relatively common, mature and reliable process to remove oxides on the surface of steel wire. At that time, a large amount of waste acid will be generated after pickling treatment. pollution of the environment. SUMMARY OF THE INVENTION [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a waste sulfuric acid freezing and iron removal recycling system and process, which can reprocess and recycle waste acid, which not only solves the problem of hazardous waste collection, transportation and treatment, but also greatly saves social resources and production costs. [0004] The was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/36C23G3/02C01G49/14
CPCC01G49/14C23G1/36C23G3/02
Inventor 李向伟冯鹏辉何建斌谭启文陈华海
Owner 鹤山恒基钢丝制品有限公司
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