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A kind of ceramsite for phosphorus recovery and preparation method thereof

A phosphorus recovery and ceramsite technology, applied in the direction of solid waste removal, etc., can solve the problems of complex preparation process, high temperature, and unsatisfactory phosphorus adsorption effect, and achieve the effect of simple preparation process, moderate strength, and few types of raw materials

Active Publication Date: 2016-11-23
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a ceramsite for phosphorus recovery and its preparation method, so as to overcome the problems of high temperature, complicated preparation process and unsatisfactory phosphorus adsorption effect in the prior art for preparing ceramsite; Comprehensive Resource Utilization of Solid Waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Proportioning is carried out according to the following raw materials in parts by weight: 50 parts of subway dregs, 15 parts of magnesium oxide, subway dregs are mainly used as the main body, and clay minerals themselves have certain adsorption capacity, which can realize the utilization of solid waste and create The pellets are sintered into balls, which are easy to recycle after adsorbing phosphorus. Subway dregs can also be replaced by dregs produced in building foundation construction, namely construction dregs. Magnesium oxide is a flux, which can reduce the sintering temperature, and can also be replaced by natural brucite ore waste or magnesite ore. The above-mentioned raw materials are prepared through the following steps: (1) Grinding and mixing the above-mentioned raw materials in parts by weight to obtain a mixture, and then making a ceramsite blank according to a water-solid ratio of 1:0.3; (2) drying the ceramsite blank for 2 hours , and then kept at 100°C...

Embodiment 2

[0025] The raw materials are proportioned according to the following parts by weight: 80 parts of subway dregs, 30 parts of magnesium oxide, 30 parts of corn stalks, and 5 parts of carboxycellulose as a binder. Corn stalks are rich in fibrous tissue, and during the sintering process, they are transformed into activated carbon, which has adsorption capacity. Carboxylated cellulose is used as a binder, mainly to facilitate the bonding of materials and facilitate granulation. The above-mentioned raw materials are prepared through the following steps: (1) crushing corn stalks, grinding and mixing the above-mentioned raw materials in parts by weight to obtain a mixture, and then making ceramsite blanks according to a water-solid ratio of 1:0.5; (2) The ceramsite blank was dried for 4 hours, then kept at 200°C for 45 minutes, and then sintered at 500°C for 60 minutes to obtain a sintered product; (3) cooling the above sintered product to obtain ceramsite for phosphorus recovery. Us...

Embodiment 3

[0027] The proportioning is carried out according to the following raw materials in parts by weight: 65 parts of subway muck, 22.5 parts of magnesium oxide, 15 parts of cotton straw, and 2.5 parts of carboxylated cellulose as a binder. The above raw materials are used to prepare through the following steps: (1) crush the cotton stalks, grind and mix the raw materials in the above parts by weight to obtain a mixture, and then make a ceramsite blank according to the water-solid ratio of 1:0.4; (2) The ceramsite blank was dried for 3 hours, then kept at 150°C for 35 minutes, and then sintered at 400°C for 42 minutes to obtain a sintered product; (3) Cool the above sintered product to obtain ceramsite for phosphorus recovery. The prepared ceramsite was used for phosphorus adsorption experiment. Weighed 0.25g of the ceramsite into 250mL series phosphorus solutions with a concentration of 2.0-30mg / L. After 12 hours of adsorption time, the removal rate of phosphorus was measured to be...

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PUM

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Abstract

The invention relates to phosphor recycling ceramsite and a preparation method thereof. 50-80 parts of subway residue soil, 0-30 parts of crop straws, 15-30 parts of magnesium oxide and 0-5 parts of adhesive carboxyl cellulose are taken as raw materials to prepare blank through the following steps: (1) crushing the crop straws, grinding and mixing the raw materials in parts by weight, and preparing ceramsite blank in a water-solid ratio of 1:(0.3-0.5); (2) drying the ceramsite blank for 2-4 hours, preserving the temperature for 25-45 minutes at 100-200 DEG C, and sintering for 24-60 minutes at 300-500 DEG C to obtain sinter; and (3) cooling the sinter to obtain a product. According to the phosphor recycling ceramsite and the preparation method disclosed by the invention, the preparation process is simple, the practical operability is strong, the sintering temperature is low, maintenance is not required, required raw material varieties are less and wide in source, the economical cost is low, the internal structure of the ceramsite is loose and porous, moderate in strength, the phosphor adsorption rate is high, the phosphor-adsorbed ceramsite can be crushed or directly used as a fertilizer for being returned to the field, and the ceramsite is ideal green and environment-friendly phosphor recycling ceramsite.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of solid waste, and in particular relates to ceramsite for phosphorus recovery and a preparation method thereof. Background technique [0002] Ceramsite is a kind of artificial lightweight aggregate made of clay, muddy rock, and industrial waste as the main raw materials, mixed with a small amount of binders, additives, etc., processed into granules or ground into balls, and finally roasted. , its high porosity, low density, anti-alkali aggregate reaction and other characteristics have a wide range of applications in the field of social production. [0003] At present, the research on ceramsite made from industrial waste such as fly ash and coal gangue has been applied to wastewater phosphorus treatment, but there is no relevant research report on ceramsite made from subway dregs or construction dregs. As the solid waste discharged in the construction of subway transportation, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C04B38/06
Inventor 谢发之李海斌圣丹丹胡婷婷汪雪春谢志勇
Owner ANHUI UNIVERSITY OF ARCHITECTURE