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Method for preparing flocculating agent by using refractory cement and roasted slag of pyrite

A technology for pyrite slag and refractory cement, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of improper proportion and unsatisfactory flocculation effect of polysilicon-alumina flocculant, and achieves low cost and adaptability to environmental protection. , the effect of good processing effect

Inactive Publication Date: 2005-10-05
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Refractory cement contains a certain amount of Al 2 o 3 , CaO 2 and SiO 2 , but due to the inappropriate proportion, the flocculation effect of polysilicon aluminum flocculant is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 25 grams of refractory cement and 25 grams of pyrite slag powder and fully mix them into a solid mixture. Add 75 grams of dilute hydrochloric acid for industrial use with a concentration of 7% into a four-necked bottle, heat it to 50°C under normal pressure, quickly add 1 / 3 of the weight of the above solid mixture, and stir for 5 minutes to rapidly increase the reaction temperature After reaching 75°C, slowly add the remaining weight of the solid mixed material, and simultaneously add 80 grams of concentrated hydrochloric acid with a concentration of 24% for industrial use dropwise, and the addition time is controlled at 20 minutes. After adding the materials, when the temperature is higher than 100°C, 90 grams of deionized water can be added to carry out the activation reaction. The reaction temperature is controlled at 80°C under normal pressure. material, that is, the flocculant product, in which Al 3+ , Fe 3+ The total content is greater than 1.50mol / L, the ...

Embodiment 2

[0021] Take 40 grams of refractory cement and 10 grams of pyrite slag powder and fully mix them into a solid mixture, take 75 grams of industrial dilute hydrochloric acid with a concentration of 8%, add it to a four-necked bottle, and heat it to 50 ° C under normal pressure. Quickly add 1 / 3 weight of the above-mentioned solid mixture material, and stir for 10 minutes, so that the reaction temperature is rapidly raised to 80 ° C, then slowly add the remaining weight of the solid mixture material, and dropwise add concentration of 33% industrial concentrated hydrochloric acid 80 gram, and the feeding time was controlled at 50 minutes. After adding the material, when the temperature is higher than 100°C, you can add 90 grams of deionized water to carry out the activation reaction. The reaction temperature is controlled at 90°C under normal pressure. After the activation reaction is carried out for 40 minutes, the material is discharged at 90°C , that is, the flocculant product, i...

Embodiment 3

[0023] Weigh 42 grams of refractory cement and 8 grams of pyrite slag powder and fully mix them into a solid mixture. Take 75 grams of dilute hydrochloric acid for industrial use with a concentration of 6% and add it to a four-necked bottle. After heating to 60°C under normal pressure, quickly add 1 / 3 of the weight of the above solid mixture and stir for 8 minutes to increase the reaction temperature rapidly. to 80° C., then slowly add the remaining weight of the solid mixed material, and simultaneously add 80 grams of industrial concentrated hydrochloric acid with a concentration of 30%, and the addition time is controlled at 60 minutes. After adding the material, when the temperature is higher than 100°C, 90 grams of deionized water can be added to carry out the activation reaction, and the reaction temperature is controlled at 90°C under normal pressure. After the activation reaction was carried out for 60 minutes, the material was discharged at 70°C to obtain the flocculan...

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Abstract

The present invention relates to a method for preparing flocculant by using refractory cement-sulfurous iron ore roasted slag. It includes the following steps: mixing refractory cement containing aluminium, silicon and iron and sulfurous ion ore roasted slag powder according to the ratio of 1:1-6:1, making partial solid mixed material and dilute hydrochloric acid with a certain concentration react at 50 deg.C-130 deg.C for 5-20 min, adding residual solid mixed material and concentrated hydrochloric acid with a certain concentration, making reaction for 20-60 min, then adding water and activating for 20-60 min. so as to obtain the invented flocculant product. The invented flocculant can be used for treating industrial waste water, and can obtain good treatment effect.

Description

technical field [0001] The invention relates to a method for reusing solid waste, especially refractory cement-pyrite slag. Background technique [0002] With the increasing tension of global water resources, people have put forward higher requirements for the reuse of water cycle. In the process of water supply and wastewater treatment, the superiority of flocculation technology is particularly prominent. Flocculants are one of the key links in flocculation technology, and can be divided into two categories: inorganic and organic flocculants according to their chemical properties. Organic flocculants such as polyacrylamide have a good treatment effect on industrial wastewater, but they are expensive and have certain residues in drinking water, which may affect the human body. Commonly used inorganic flocculants include aluminum sulfate, aluminum chloride, ferric chloride, ferrous sulfate and their various polymerization forms. For now, traditional inorganic flocculants h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 衣守志贾青竹刘凤琴石淑兰赵瑞华苏继成
Owner TIANJIN UNIV OF SCI & TECH