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Preparation method of modified loess-based ceramsite for treating rainwater

A modification and loess technology, applied in clay products, ceramic products, sustainable biological treatment and other directions, can solve the problems of polluted water and soil environment, coal gangue occupying large land, air pollution, etc. The effect of poor infiltration performance and stable effluent quality

Inactive Publication Date: 2019-05-21
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The exposed coal gangue occupies a large amount of land, and it will be weathered into dust in the open-air stacking environment. These dusts will pollute the atmospheric environment under the action of wind, and will also pollute the water body and soil environment.

Method used

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  • Preparation method of modified loess-based ceramsite for treating rainwater
  • Preparation method of modified loess-based ceramsite for treating rainwater
  • Preparation method of modified loess-based ceramsite for treating rainwater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 A method for preparing modified loess-based ceramsite for treating rainwater, the method refers to: first, 2 kg of modified loess, 1 kg of modified coal gangue, 0.45 kg of bentonite, 0.30 kg of sodium silicate, and 0.15 kg of calcium carbonate After mixing evenly, add water and stir evenly to make mud. The mud is made into pellets with a particle size of 5~10mm by a pelletizing machine; then the shaped pellets are dried at 105°C for 2~4 hours, and then fired in a muffle furnace. After the furnace is naturally cooled, take it out to obtain loess-based ceramsite.

Embodiment 2

[0025] Example 2 A method for preparing modified loess-based ceramsite for treating rainwater. The method refers to: first mix 1 kg of modified loess, 1 kg of modified coal gangue, 0.40 kg of bentonite, and 0.50 kg of sodium silicate, and then add water and stir Uniformly made mud material, the mud material is made of pellets with a particle size of 5~10mm by a pelletizing machine; then the shaped pellets are dried at 105°C for 2~4 hours, and then fired in a muffle furnace, and the furnace is naturally Take it out after cooling to get loess-based ceramsite.

Embodiment 3

[0026] Example 3 A method for preparing modified loess-based ceramsite for treating rainwater. The method refers to: firstly, 1.5 kg of modified loess, 1 kg of modified coal gangue, 0.45 kg of bentonite, 0.5 kg of sodium silicate, and 0.0625 kg of carbonic acid After the calcium is mixed evenly, add water and stir evenly to make mud. The mud is made of pellets with a particle size of 5~10mm by a pelletizing machine; then the shaped pellets are dried at 105°C for 2~4 hours, and then processed in a muffle furnace. Fire it, and take it out after the furnace cools down naturally to get the loess-based ceramsite.

[0027] In the above-mentioned Examples 1-3, the modified loess refers to the obtained loess in Lanzhou area from which impurities have been removed from the soil, passed through a 60-mesh sieve, and dried at 105° C. for 2 hours.

[0028] Modified coal gangue is obtained by crushing coal gangue through a 60-mesh sieve and drying at 105°C for 2 hours.

[0029] The firing ...

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Abstract

The invention relates to a preparation method of modified loess-based ceramsite for treating rainwater, the method comprises the following steps: firstly, mixing modified loess, modified coal gangue,bentonite, sodium silicate and calcium carbonate uniformly, adding water, uniformly stirring to prepare a mud material, utilizing a pelleting machineto prepare the mud material into pellets with the particle size of 5-10 mm; and drying the formed pellets at 105 DEG C for 2-4 hours, then firing the pellets in a muffle furnace, and taking the pellets out to obtain the modified loess-based ceramsiteafter a hearth is naturally cooled. The method has the characteristics of easily available raw materials, low cost and high practicability, and the obtained modified loess-based ceramsite can be usedfor treating initial rainwater runoff.

Description

technical field [0001] The invention relates to the field of water treatment fillers, in particular to a preparation method of modified loess-based ceramsite for treating rainwater. Background technique [0002] Lanzhou City is located on the Loess Plateau, and most of its territory is hills and basins covered by loess. Loess has been formed by wind blowing, transportation and accumulation since the Quaternary Period. The Malan loess in Lanzhou area has well-developed pores and vertical joints. It is mainly composed of silt soil, contains a variety of soluble salts, has low water content, is loose and porous, and is therefore easy to be scoured. Heavy rains are particularly likely to cause severe soil erosion. The loess belongs to the typical self-weight collapsible loess, that is, the collapsible loess that collapses under the saturated self-weight pressure after being soaked in water. Therefore, after the loess is soaked by water, its structure is quickly destroyed and ...

Claims

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Application Information

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IPC IPC(8): C04B33/13C04B33/132C04B38/00C02F3/10
CPCY02W10/10Y02P40/60
Inventor 李慧莉张榆敏何芙蓉杨月婷张宝张炜豪杨子显
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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