Composite flocculant for fine particle settling and its use

By using a composite flocculant composed of polyaluminum chloride, sodium alginate, sodium hexametaphosphate, polyacrylamide, and polyethylene oxide, the problems of slow settling speed of fine particles and easy floc breakage were solved, forming efficient and dense flocs and improving the settling effect of slurry.

CN121754924BActive Publication Date: 2026-07-14NANHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANHUA UNIV
Filing Date
2026-03-03
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing high molecular weight PAM flocculants dissolve slowly in the sedimentation of fine particles, and the resulting flocs are loose and easily broken, leading to poor sedimentation effect. Furthermore, traditional composite flocculants have limited effectiveness in treating extremely fine particles.

Method used

A composite flocculant composed of polyaluminum chloride, sodium alginate, sodium hexametaphosphate, polyacrylamide, and polyethylene oxide is used to form dense, high-strength flocs through charge neutralization, hydrogen bonding, and bridging, thereby improving flocculation speed and effectiveness.

Benefits of technology

It enables rapid sedimentation of fine mineral particles, and the generated flocs are dense and strong, able to remain intact under the action of the flow field, thereby improving sedimentation efficiency and underflow concentration, and reducing reagent waste and equipment blockage risk.

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Abstract

The present application belongs to the technical field of ore pulp concentration and sedimentation, and particularly relates to a composite flocculating agent for fine ore particle sedimentation and application thereof. The composite flocculating agent is composed of polyaluminum chloride, sodium hexametaphosphate, polyacrylamide, polyethylene oxide and sodium alginate. The method for sedimentation is as follows: firstly, polyaluminum chloride and sodium alginate are prepared into solution A, and sodium hexametaphosphate, polyacrylamide and polyethylene oxide are prepared into solution B; secondly, solution A is mixed with the ore pulp to be treated at high speed until uniform mixing; finally, solution B is added, and low-speed stirring is performed until uniform mixing, and then standing and waiting for completion of sedimentation. The composite flocculating agent has the characteristics of environmental protection, wide raw materials, low cost and strong flocculation specificity for fine ore particles. Through the synergistic effect of the components, the composite flocculating agent not only has a faster flocculation speed and water body adaptability, but also has the characteristics of dense and high structural strength of the generated flocs, greatly improving the flocculation effect.
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