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Method for preparing flocculant with fly ash and vanadium-titanium magnetite

A technology for vanadium titanomagnetite and fly ash, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the flocculation effect needs to be improved, the process is long, and the cost High problems, to achieve the effect of superior water purification effect, rapid forming, and high molecular polymerization degree

Active Publication Date: 2021-08-24
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is: the existing method for preparing flocculant by using fly ash has long flow, high cost, and the problem that the flocculation effect needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1 Preparation of flocculant by the method of the present invention

[0040] Take a certain amount of vanadium-titanium-magnetite raw ore and pass it through a 200-mesh Taylor sieve, mix and sample for later use. Weigh 4g of ready-to-use vanadium-titanium-magnetite raw ore and dissolve it in 30% 50mL NaOH solution. After reacting for 90 minutes, take the supernatant liquid A (hereinafter referred to as liquid A) for use. Weigh 45g of fly ash in a 500mL beaker, add 1mol / LHCl and 1mol / LH 2 SO 4 75 mL each, and then add 2 g of co-solvent NaCl, and magnetically stir at a constant temperature at 28 ° C for 1.0 h to obtain the acid-treated fly ash mixture, and take the supernatant B (hereinafter referred to as B liquid). Mix A:B evenly according to the volume ratio of 3:1 to get a light blue and slightly yellow viscous liquid flocculant. Evaporate and crystallize under the condition of electric furnace power of 150kw to obtain light blue flake solid flocculant. Usi...

Embodiment 2

[0041] Example 2 Preparation of flocculant by the method of the present invention

[0042] Take a certain amount of vanadium-titanium-magnetite raw ore and pass it through a 200-mesh Taylor sieve, mix and sample for later use. Weigh 8g of vanadium-titanium-magnetite raw ore to be used and dissolve it in 30% 100mL NaOH solution. After reacting for 90min, take the supernatant liquid A (hereinafter referred to as liquid A) for use. Weigh 90g of fly ash in a 500mL beaker, add 1mol / LHCl and 1mol / LH 2 SO 4 150 mL each, then add 4 g co-solvent NaCl, and stir magnetically at a constant temperature at 28 ° C for 2.0 h to obtain the acid-treated fly ash mixture, and take the supernatant B (hereinafter referred to as B liquid). Mix A:B evenly according to the volume ratio of 3:1 to get a light blue and slightly yellow viscous liquid flocculant. Evaporate and crystallize under the condition of electric furnace power of 150kw to obtain light blue flake solid flocculant. The removal rat...

Embodiment 3

[0043] Example 3 Preparation of flocculant by the method of the present invention

[0044] Take a certain amount of vanadium-titanium magnetite and fly ash to pass through a 200-mesh Taylor sieve, mix and sample for later use. Weigh 2 kg of raw vanadium-titanium-magnetite ore to be used and dissolve it in 30% 25L NaOH solution. After reacting for 90 minutes, take the supernatant liquid A (hereinafter referred to as liquid A) for use. Weigh 3kg of fly ash, add 1mol / LHCl and 1mol / LH 2 SO 4 50L each, and then add 1.3kg of co-solvent NaCl, and stir magnetically at a constant temperature at 28°C for 2.0h to obtain the acid-treated fly ash mixture, and take the supernatant B (hereinafter referred to as B liquid). Mix A:B evenly at a volume ratio of 3:1 to obtain a light blue and slightly yellow viscous liquid flocculant. Evaporate and crystallize to obtain a light blue flaky solid flocculant. The flocculant is used to treat chromium-containing wastewater and copper-containing wa...

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PUM

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Abstract

The invention belongs to the technical field of waste utilization, and in particular relates to a method for preparing a flocculant by using fly ash and vanadium-titanium magnetite. Aiming at the problems of long process flow, high cost and poor flocculation effect of the existing method for preparing flocculant by using fly ash, the invention provides a method for preparing flocculant with fly ash and vanadium-titanium magnetite, the steps are as follows: a 1. Pulverize the vanadium-titanium magnetite and set it aside; b. Take the vanadium-titanium magnetite, dissolve it in NaOH solution, react for 60-90 minutes, and take the supernatant A; 3:1 HCl and H 2 SO 4 , then add NaCl, and stir magnetically at a constant temperature at 25-35°C for 0.5-2.5 hours to obtain an acid-treated fly ash mixture, and take the supernatant liquid B; Mix well, then evaporate and crystallize at 80-150°C to obtain polysilicate flocculant. The invention prepares a polysilicate flocculant, which combines the advantages of aluminum-based and iron-based flocculants, and has good flocculation effect; the preparation process is simple and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of solid waste utilization, and in particular relates to a method for preparing a flocculant by using fly ash and vanadium-titanium magnetite. Background technique [0002] Flocculant refers to a class of substances that can produce flocs and remove insoluble substances, colloids or suspended particles in the solution through adsorption, bridging, cross-linking, etc. It mainly includes natural flocculants, inorganic polymer flocculants, organic synthetic polymer flocculants and microbial flocculants. Inorganic flocculants, mainly including silicates, aluminum salts, iron salts and their hydrolyzed polymers, etc., have a wide range of sources, simple process, non-toxic and cheap, and are superior to biological effects in wastewater treatment and eutrophication. In the actual production process, inorganic flocculants are widely used. [0003] The solid waste fly ash produced during the power generation proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F101/20C02F101/22
CPCC02F1/5236C02F1/5245C02F2101/20C02F2101/22
Inventor 李海兰黄延
Owner PANZHIHUA UNIV
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