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A kind of preparation method of defluoridation material based on bamboo matter

A technology of fluorine materials and bamboo, which is applied in the resource utilization of bamboo waste, and the field of preparation of bamboo-based fluoride removal materials, which can solve the problems of high processing cost, large amount of defluorination agent, and consumption of fluoride removal agent. , to achieve the effects of simple preparation process, large fluorine adsorption capacity, and large fluorine removal capacity

Active Publication Date: 2021-07-16
湖南烯富环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these technologies have a positive effect in reducing the fluorine content in water, there are still problems such as high treatment costs, the consumption of more resources for the preparation of defluoridation agents, the large amount of defluoridation agents, secondary pollution, and the treatment of water bodies with different pH values. There are no defects in universality and other aspects
Patents CN102259946A, CN102357357A and CN104324684A can all obtain good defluorination effects, but these technologies are mostly only suitable for treating neutral water; Avoid the loss of the valuable element zinc in the electrolyte
[0004] On the other hand, my country is the country with the most abundant bamboo resources in the world, but the utilization rate of bamboo is less than 50%, and the utilization rate of individual products is less than 20%, which causes a large amount of waste of bamboo resources and pollutes the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Preparation and defluoridation capacity of bamboo chips-based defluoridation materials

[0048] (1) The preparation steps based on bamboo chips defluoridation material are as follows:

[0049] The first step: preparation of bamboo charcoal mixture containing high specific surface area

[0050] 1. After the bamboo chips are dried until the moisture is lower than 10wt%, they are pulverized into bamboo powders with a size less than 0.5mm with a milling equipment;

[0051] ②Mix the bamboo powder and the phosphoric acid solution with a concentration of 85wt% according to the mass ratio of 1:1, then stir the mixture at 70°C until the water is evaporated to dryness, and then press it on the extruder with a pressure of 15MPa to form Columnar particles with a diameter of 2mm, the length is not limited;

[0052] ③Dry the above-mentioned columnar particles at 100°C for 4 hours;

[0053] ④Heat the dried columnar particles to 400°C under the protection of nitrogen atmosphere, ...

Embodiment 2

[0066] Preparation method of bamboo head-based fluoride removal material and its effect on the removal of fluorine in zinc sulfate electrolyte

[0067] (1) The preparation steps based on the bamboo head defluoridation material are as follows:

[0068] The first step: preparation of bamboo charcoal mixture containing high specific surface area

[0069] 1. After the bamboo head is dried until the moisture is lower than 10wt%, it is pulverized into bamboo powder with a size less than 0.5mm with a milling equipment;

[0070] ②Mix the bamboo powder with the phosphoric acid solution with a concentration of 40wt% (mass fraction) according to the mass ratio of 3:1, and then stir the mixture at 100°C until the water is evaporated to dryness. Pressed into columnar particles with a diameter of 5mm, the length is not limited;

[0071] ③Dry the above-mentioned columnar particles at 200°C for 2 hours;

[0072] ④The dried columnar particles are heated to 550°C under the protection of ammo...

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Abstract

The invention relates to resource utilization technology of bamboo waste, in particular to a preparation method of a bamboo-based fluoride-removing material, which can efficiently remove fluorine from tap water and general industrial waste water, and is especially useful for removing fluorine from wet-process zinc The fluorine in the zinc sulfate electrolytic solution has obvious effects and belongs to the technical field of water treatment. The preparation method of the bamboo-based fluorine-removing material comprises the steps of preparation of a mixed liquid containing bamboo charcoal with high specific surface area, synthesis of slurry containing bamboo charcoal and calcium phosphate precursor, and hydrothermal aftertreatment. The fluoride removal material provided by the invention has the characteristics of rapid fluoride removal, low cost, and fluorine removal slag can be used as fuel, etc., and also realizes waste treatment, making bamboo processing residues the main raw material for treating "fluorine damage".

Description

technical field [0001] The invention relates to resource utilization technology of bamboo waste, in particular to a method for preparing a fluorine-removing material based on bamboo. The fluoride-removing material can efficiently remove fluorine in tap water and general industrial waste water, and is especially useful for removing fluorine from wet zinc smelting. The fluorine in the zinc sulfate electrolytic solution has obvious effects and belongs to the technical field of water treatment. Background technique [0002] my country's fluorine chemical industry, iron and steel production, aluminum electrolysis and aluminum processing, acid production and sulfide-containing fertilizer production, glass product manufacturing and processing, non-ferrous metal smelting and other industries produce a large amount of fluorine-containing wastewater every year. The fluorine content in water and groundwater also seriously exceeds the standard. The existence of high fluorine in water ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20C02F1/28C02F101/14
CPCC02F1/5236C02F2101/14
Inventor 王辉周向阳周向清葛金月周进辉
Owner 湖南烯富环保科技有限公司
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