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Method for recovering aluminum resources from water treatment agent polyaluminum chloride waste

A technology of polyaluminum chloride waste residue and water treatment agent, which is applied to the removal of solid waste and other directions, can solve the problems of high roasting temperature, high difficulty, energy consumption and pickling waste residue, etc., and achieves low cost, resource saving, and easy industrialization promotion. Effect

Active Publication Date: 2019-05-03
河南省福可思环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses a large amount of hydrochloric acid solution and high roasting temperature, which consumes a large amount of energy and will generate pickling waste residue again. Therefore, how to treat polyaluminum chloride waste residue at low cost and recover aluminum resources from it is very difficult at present. big one question

Method used

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  • Method for recovering aluminum resources from water treatment agent polyaluminum chloride waste
  • Method for recovering aluminum resources from water treatment agent polyaluminum chloride waste
  • Method for recovering aluminum resources from water treatment agent polyaluminum chloride waste

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Embodiment 1

[0031] This embodiment provides a method for recycling aluminum resources from water treatment agent polyaluminum chloride waste slag, the specific flow chart is as follows figure 1 As shown, it specifically includes the following steps:

[0032] DeCl -Treatment The water treatment agent polyaluminum chloride waste slag is washed with water and alkaline with lye to obtain dechlorinated treatment liquid and mixed mud; among them, the Cl in the mixed mud - Concentration is 0.2%, water soluble Al 3+ Concentration is 0.4%, deCl - Al in the treatment solution 2 o 3 The mass percentage content is 5%;

[0033] Spray treatment The mixed mud is subjected to static sedimentation and sieving treatment to obtain the upper mud, middle layer particles and bottom layer particles, and the bottom layer particles are sprayed to obtain aluminum-containing sand and spray waste liquid, and the spray is recovered. Spraying the waste liquid and using the spraying waste liquid as a water source...

Embodiment 2

[0036] This embodiment provides a method for recycling aluminum resources from water treatment agent polyaluminum chloride waste slag, the specific flow chart is as follows figure 2 As shown, it specifically includes the following steps:

[0037] DeCl - Firstly, the waste slag of water treatment agent polyaluminum chloride is roughly selected to obtain the waste slag of water treatment agent polyaluminium chloride with a particle size greater than 15mm and the waste slag of water treatment agent polyaluminium chloride with a particle size of less than 15mm; The water treatment agent polyaluminum chloride waste slag with a particle size greater than 15 mm is crushed into a water treatment agent polyaluminum chloride waste slag with a particle size less than 15 mm;

[0038] Utilize the disintegration device to carry out the water treatment agent polyaluminum chloride waste slag of water treatment agent less than 15mm successively after coarse selection and through pulverizing ...

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Abstract

The invention provides a method for recovering aluminum resources from the water treatment agent polyaluminum chloride waste. The method includes the steps that water washing treatment is conducted onthe water treatment agent polyaluminum chloride waste, alkali washing treatment is conducted on the water treatment agent polyaluminum chloride waste with lye, treatment liquid with Cl<-> removed andmixed mud are obtained, static settlement and screening treatment are conducted on the mixed mud, upper layer mud, middle later particles and bottom layer particles are obtained, and sand containingaluminum and spraying waste liquid are obtained by spraying the bottom layer particles. The method realizes the recovery of the aluminum resources from the water treatment agent polyaluminum chloridewaste, reduces the waste of resources, and meanwhile, is easy to industrialize and popularize.

Description

technical field [0001] The invention relates to the field of water treatment agents, in particular to a method for recovering aluminum resources from polyaluminum chloride waste slag of water treatment agents. Background technique [0002] Polyaluminum chloride waste residue (referred to as PAC waste residue) is a waste residue formed by the reaction of bauxite and calcium aluminate powder with hydrochloric acid or mixed acid under certain conditions to obtain liquid PAC, and the residual solid. Polyaluminium chloride is a high-efficiency flocculant in water treatment. It has the characteristics of high adsorption activity, short sediment clarification time, wide pH range, no need for coagulants and no influence of water temperature. It is widely used in colloids and suspended solids. , Removal of organic matter, metal ions, phosphate, toxic metals, chroma, etc. There are many methods of producing PAC at home and abroad, and the common method is the two-step method of acid-...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
Inventor 焦天伟刘松涛马之栋
Owner 河南省福可思环保科技有限公司
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