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Method for preparing iron-titanium-vanadium ternary polymeric flocculant by hydrochloric acid dissolution vanadium titano-magnetite one-step method

A polymer flocculant, vanadium-titanium magnetite technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water treatment parameter control, etc., can solve the problem of large raw materials and low utilization rate of vanadium-titanium magnetite And other issues

Active Publication Date: 2021-07-06
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method involves more raw materials, and NaOH solution is difficult to dissolve non-amphoteric metal ions such as iron, titanium and vanadium, so the utilization rate of vanadium-titanium magnetite is relatively low

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0034] As a preferred embodiment of the present invention, the method for preparing iron-titanium-vanadium ternary polymer flocculant by the one-step process of dissolving vanadium-titanium magnetite with hydrochloric acid comprises the following steps:

[0035] Dry the vanadium-titanium magnetite, grind it into a powder, and dry it in an oven at 60°C until it reaches a constant weight.

[0036] Weigh 10 g of the mineral powder obtained in step (1) into a reactor, and stir at 60 rpm for 5 h at a leaching temperature of 80° C., a liquid-solid mass ratio of 4:1, and an initial hydrochloric acid concentration of 20%.

[0037] After the reaction is completed, the mixture in the reactor is suction-filtered, and the volume of the leachate after the suction-filtration is measured at the same time. The leachate is stored in a glass tube and stored at room temperature.

[0038] Take a part of the original leaching solution and dilute it by 50 times, measure the concentration of dissolv...

Embodiment 2

[0041] As a preferred embodiment of the present invention, the method for preparing iron-titanium-vanadium ternary polymer flocculant by the one-step process of dissolving vanadium-titanium magnetite with hydrochloric acid comprises the following steps:

[0042] Dry the vanadium-titanium magnetite, grind it into a powder, and dry it in an oven at 60°C until it reaches a constant weight.

[0043] Weigh 10 g of the mineral powder obtained in step (1) into a reactor, and stir at 80 rpm for 6 h at a leaching temperature of 90° C., a liquid-solid mass ratio of 5:1, and an initial hydrochloric acid concentration of 10%.

[0044] After the reaction is completed, the mixture in the reactor is suction-filtered, and the volume of the leachate after the suction-filtration is measured at the same time. The leachate is stored in a glass tube and stored at room temperature.

[0045] A part of the original leachate was diluted 50 times, and the concentration of dissolved metal ions was measu...

Embodiment 3

[0048] As a preferred embodiment of the present invention, the method for preparing iron-titanium-vanadium ternary polymer flocculant by the one-step process of dissolving vanadium-titanium magnetite with hydrochloric acid comprises the following steps:

[0049] Dry the vanadium-titanium magnetite, grind it into a powder, and dry it in an oven at 60°C until it reaches a constant weight.

[0050] Weigh 10 g of the mineral powder obtained in step (1) into a reactor, and stir at 100 rpm for 10 h at a leaching temperature of 100° C., a liquid-solid mass ratio of 6:1, and an initial hydrochloric acid concentration of 5%.

[0051] After the reaction is completed, the mixture in the reactor is suction-filtered, and the volume of the leachate after the suction-filtration is measured at the same time. The leachate is stored in a glass tube and stored at room temperature.

[0052] A part of the original leachate was diluted 50 times, and the concentration of dissolved metal ions was mea...

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Abstract

The invention discloses a method for preparing an iron-titanium-vanadium ternary polymeric flocculant through a hydrochloric acid dissolution vanadium titano-magnetite one-step method, and belongs to the technical field of flocculant preparation. According to the method, vanadium titano-magnetite concentrate is used as a raw material, dried and ground into powder, the powder is placed in a three-neck flask reactor, hydrochloric acid is added for a leaching reaction, the reaction temperature, the reaction time, the hydrochloric acid concentration and the liquid-solid ratio are controlled, and the leaching reaction process is carried out under normal pressure under magnetic stirring. After the reaction is completed, leaching liquid in the reactor is subjected to suction filtration to obtain filtrate, the concentration of dissolved-out metal ions is measured through an inductively coupled plasma spectrum generator, sodium hydroxide with different volumes and specific concentrations is added for alkalization, and after further aging, storage in a glass container at normal temperature is conducted. The method is stable in reaction, simple to operate, easy to control and free of high temperature, the obtained inorganic polymeric flocculant is good in stability, the removal effect on organic matter is better than that of a conventional aluminum flocculant, cost is low, and the method has a certain application prospect in the area where vanadium titano-magnetite is convenient to transport.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and in particular relates to a method for preparing iron-titanium-vanadium ternary polymer flocculants by one-step method of dissolving vanadium-titanium magnetite with hydrochloric acid. Background technique [0002] Coagulation is one of the most commonly used methods in the water treatment process. It is simple, economical, and efficient. However, when dealing with organic wastewater, the effect of conventional flocculants is often not ideal. According to the chemical composition, flocculants can be divided into two types: inorganic flocculants and organic flocculants, among which the organic matter removal ability of inorganic flocculants is stronger than that of organic flocculants. However, the organic matter removal capacity of the most commonly used aluminum-based and iron-based flocculants still cannot meet the treatment requirements of some organic wastewater. Titanium flocculant i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F101/30
CPCC02F1/5236C02F1/5245C02F2101/30C02F2209/20C02F2209/11Y02P10/20
Inventor 聂煜东耿媛媛沈倩颜海燕申粤李金
Owner CHONGQING UNIV OF TECH
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