Phosphorus removal modified slag haycite and preparation method and application thereof

A phosphorus modification and steel slag technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of low phosphorus removal efficiency and complicated preparation methods, and achieve good adsorption effect, The effect of simple preparation method and wide industrial application prospect

Inactive Publication Date: 2017-07-14
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a modified steel slag ceramsite for phosphorus removal, so as to solve the problems of complex preparation methods and low phosphorus removal efficiency of existing steel slag-based phosphorus removal adsorbents.

Method used

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  • Phosphorus removal modified slag haycite and preparation method and application thereof
  • Phosphorus removal modified slag haycite and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Crush the steel slag to a fineness of 100-200 mesh, and dry it at 105°C to obtain steel slag powder. Mix 100-200 mesh steel slag powder with calcium hydroxide at a mass ratio of 5:1, add a certain amount of water to it, and place it in a constant temperature magnetic stirrer at 70°C for 4 hours to obtain calcium hydroxide-modified steel slag slurry material.

[0034] According to calcium hydroxide modified steel slag: montmorillonite powder: soluble starch mass ratio is 60%: 25%: 15%, add montmorillonite powder and soluble starch to calcium hydroxide modified steel slag slurry, stir evenly, get Mix slurry.

[0035] The above mixed slurry is granulated and casted to make particles with a particle size of 3~5mm, and the particles are dried under natural conditions for 24 hours, and then the obtained particles are put into a muffle furnace and calcined in an air atmosphere at 1100°C After 30 minutes, it was taken out after natural cooling to obtain steel slag ceramsite m...

Embodiment 2

[0039] 100 mL of KH with an initial concentration of 0.5 mg / L 2 PO 4 The solution (calculated as P) is packed into a 250mL series conical flask with a stopper, and the pH value of the solution is adjusted to neutrality by using 5% hydrochloric acid and 5% sodium hydroxide, and the adsorbent amount prepared in Example 1 of 5g / L is added respectively. Calcium hydroxide modified steel slag ceramsite or steel slag ceramsite prepared in Comparative Example 1 and 0.5g toluene (as microbial inhibitor), 3 parallel experiments for each group. Place the Erlenmeyer flask in a shaker at 25°C and 150r / min for 1 hour. During this period, take samples every 10 min, 20 min, 30 min, 45 min, and 60 min. Take the supernatant and filter it with a 0.45 μm filter membrane. Filter, and measure the concentration of residual phosphate in the filtrate after filtration. The phosphorus removal experiment results of the modified steel slag ceramsite prepared in Example 1 and the steel slag ceramsite pre...

Embodiment 3

[0042] Crush the steel slag to a fineness of 100-200 mesh, and dry it at 105°C to obtain steel slag powder. Mix 100-200 mesh steel slag powder and calcium hydroxide at a mass ratio of 3:1, add a certain amount of water to it and place it in a constant temperature magnetic stirrer at 70°C for 4 hours to obtain calcium hydroxide-modified steel slag slurry material.

[0043] According to calcium hydroxide modified steel slag: montmorillonite powder: soluble starch mass ratio is 80%: 15%: 5%, add montmorillonite powder and soluble starch to calcium hydroxide modified steel slag slurry, stir evenly, get Mix slurry.

[0044] The above mixed slurry is granulated and casted to make particles with a particle size of 3~5mm, and the particles are dried under natural conditions for 24 hours, and then the obtained particles are put into a muffle furnace and calcined at 1300°C in an air atmosphere After 15 minutes, take it out after natural cooling to obtain steel slag ceramsite modified ...

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Abstract

The invention provides phosphorus removal modified slag haycite and a preparation method and an application thereof. The phosphorus removal modified slag haycite is formed by mixing, granulating and sintering raw materials, calcium hydroxide modified slag, an adhesive and a pore-enlarging agent; the mass ratio of the calcium hydroxide modified slag to the adhesive to the pore-enlarging agent is (50-80%): (15-30%):(5-20%). The calcium hydroxide modified slag is mixed slurry prepared by adding water after mixing slag and calcium hydroxide powder in a mass ratio of (2-5): 1. When the modified slag haycite is adopted for removing phosphorus, the modified slag haycite is substantially not affected by pH value of a water body, can adsorb phosphate in the water body efficiently within a short time, is good in adsorption effect and high in phosphorus removal efficiency, and not only can be directly used for repairing eutrophicated rivers and lakes, but also can be used for forced phosphorous removal of an artificial wetland and deep treatment of conventional waste water treatment engineering and etc. The used raw materials are wide in source and low in price. The preparation method is simple, green and environment-friendly, in process and high in operability and has a wide industrial application prospect.

Description

technical field [0001] The invention relates to a water treatment material, in particular to a modified steel slag ceramsite for phosphorus removal and its preparation method and application. Background technique [0002] In recent years, with the rapid development of industrial and agricultural production, the water environment of lakes is deteriorating day by day, and the problem of eutrophication is particularly prominent. Phosphorus is the main controlling factor of water eutrophication, and the removal of phosphorus in wastewater is beneficial to alleviate water eutrophication. Common phosphorus removal technologies mainly include chemical methods, biological methods and adsorption methods. Among them, chemical methods are simple to operate, but require a large amount of chemicals, high treatment costs, and easily cause water pollution; biological phosphorus removal includes A / O process, A 2 / O process and UCT process, etc., but they are greatly affected by environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/12B01J20/28016B01J2220/4887C02F1/281C02F2101/105Y02A20/402
Inventor 梁淑轩纪鹏华秦哲路达靳明金晓玲
Owner HEBEI UNIVERSITY
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