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System and method for preparing magnesium-zinc ferrite from acid pickling sludge and acid pickling waste liquor

A technology for pickling sludge and pickling waste liquid, which is applied in the field of hazardous waste recycling, can solve the problems of difficult treatment of pickling sludge and pickling waste liquid, and achieve the effect of realizing resource utilization.

Pending Publication Date: 2018-02-09
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problem that pickling sludge and pickling waste liquid are difficult to deal with in the current metallurgical industry, the present invention provides a system and method for preparing magnesium-zinc ferrite by using pickling sludge and pickling waste liquid

Method used

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  • System and method for preparing magnesium-zinc ferrite from acid pickling sludge and acid pickling waste liquor
  • System and method for preparing magnesium-zinc ferrite from acid pickling sludge and acid pickling waste liquor

Examples

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Embodiment 1

[0059] Such as figure 1 As shown, a system for preparing magnesium-zinc ferrite by using pickling sludge and pickling waste liquid includes a water storage tank 1, a water pump 2, a ferrite hydrothermal preparation device 3, a first feed pump 4, a second Two feed pump 5, acid storage tank 6, alkali storage tank 7, discharge pump 8, solid-liquid separation press filter device 9 and ferrite drying device 11, the water storage tank 1, the acid storage tank 6, The alkali storage tank 7 is connected to the ferrite hydrothermal preparation device 3 through the water pump 2, the first feed pump 4, and the second feed pump 5 respectively, and the ferrite hydrothermal The discharge port of the preparation device 3 is connected to the solid-liquid separation filter press device 9 through the discharge pump 8 , and the solid-liquid separation filter press device 9 is connected to the ferrite drying device 11 . The ferrite hydrothermal preparation device 3 has a stirring function, and th...

Embodiment 2

[0062] Such as figure 1 As shown, a system for preparing magnesium-zinc ferrite by using pickling sludge and pickling waste liquid, its structure is compared with that of Example 1, the difference is: the ferrite hydrothermal preparation device 3 includes A reaction kettle and an agitator, the agitator is located in the reaction kettle, the longitudinal section of the bottom of the reaction kettle is oval, and the bottom concave structure is conducive to the discharge of the ferrite mixed liquid, in order to achieve acid and alkali resistance For the purpose of high temperature and high pressure resistance, the agitator is made of polytetrafluoroethylene and has a U-shaped structure.

Embodiment 3

[0064] Such as figure 1 As shown, a system for preparing magnesium-zinc ferrite by using pickling sludge and pickling waste liquid, its structure is compared with that of Example 1, the difference is: the solid-liquid separation filter press device 9 is a plate frame Filter press, plate and frame filter press process can realize the effective separation of solids and liquids. At present, the water content can be reduced to 70% at most through this process.

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Abstract

The invention discloses a system and a method for preparing a magnesium-zinc ferrite from acid pickling sludge and acid pickling waste liquor and belongs to the field of recycling of hazardous waste.The system comprises a water storage tank, a water pump, a ferrite hydrothermal preparation device, a first charging pump, a second charging pump, an acid storage tank, an alkali storage tank, a discharging pump, a solid-liquid separation and filter-pressing device, a ferrite drying device and a ferrite collecting device, wherein the water storage tank, the acid storage tank and the alkali storagetank are connected with the ferrite hydrothermal preparation device through the water pump, the first charging pump and the second charging pump respectively; a discharge port of the ferrite hydrothermal preparation device is connected with the solid-liquid separation and filter-pressing device through the discharging pump; the solid-liquid separation and filter-pressing device is connected withthe ferrite drying device. The method for preparing the magnesium-zinc ferrite from the acid pickling sludge and the acid pickling waste liquor comprises steps of precursor preparation, hydrothermal preparation of the ferrite, solid-liquid separation and ferrite drying. The acid pickling sludge and the acid pickling waste liquor are co-processed in a recycling manner for preparing the magnesium-zinc ferrite.

Description

technical field [0001] The invention belongs to the field of hazardous waste recycling, and relates to a system and method for preparing magnesium-zinc ferrite by using pickling sludge and pickling waste liquid, more specifically, to a pickling sludge and pickling waste A co-processing system and method for preparing magnesium-zinc ferrite by liquid hydrothermal method uses pickling sludge and pickling waste liquid as raw materials to prepare an industrial product with high added value—magnesium-zinc ferrite. Background technique [0002] In the production process of the metallurgical industry, a large amount of pickling sludge and pickling waste liquid will be produced, which contain a large amount of heavy metal ions, which is difficult to deal with and high in disposal costs. No economical and effective disposal method has been found, resulting in serious regional characteristics Environmental pollution has seriously restricted the development of the metallurgical industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G49/0063C01P2002/32C01P2006/42C01P2004/52C01P2004/64
Inventor 张毅敏徐斌陈程彭福全孔明朱月明
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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