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

A technology of polyaluminum chloride waste slag and water treatment agent, which is applied to the removal of solid waste, etc., and can solve the problems of high roasting temperature, energy consumption of pickling waste slag, and difficulty

Active Publication Date: 2021-04-27
河南省福可思环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

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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 washed with lye to obtain the de-Cl - Treatment fluid and mixed mud; among them, Cl in 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 wh...

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 polyaluminum chloride waste slag of the water treatment agent, which comprises washing the polyaluminum chloride waste slag of the water treatment agent with water and carrying out alkaline washing treatment with lye to obtain Cl removal ‑ treatment liquid and mixed mud; the mixed mud is subjected to static sedimentation and sieving treatment to obtain 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. The method realizes the recovery of aluminum resources from the polyaluminum chloride waste slag of the water treatment agent, reduces waste of resources, and at the same time, the method is easy to be popularized in an industrialized manner.

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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Patent Type & Authority Patents(China)
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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