A kind of treatment method and application of coal gangue
A treatment method and technology for coal gangue, applied in the field of coal gangue treatment, can solve the problems of groundwater resource pollution, treating the symptoms but not the root cause, and not being able to fundamentally treat the problem of spontaneous combustion.
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Embodiment 1
[0063] Embodiment 1: a kind of treatment method of coal gangue, the coal gangue engineering soil obtained therefrom and its application:
[0064] This preferred embodiment includes the following first to third aspects.
[0065] In the first aspect, the present embodiment provides a method for processing coal gangue, which includes the following steps:
[0066] A. mix pickling with coal gangue powder and water and acid to get pickling gangue powder;
[0067] B. adding water to granulate the pickling gangue powder after removing pyrite to obtain gangue-based microspheres;
[0068] C. impregnating coal gangue-based microspheres into a solution containing iron salts and zinc salts to obtain impregnated microspheres;
[0069] D. impregnating the microspheres for ozone aeration and ultrasonic treatment to obtain activated gangue microspheres;
[0070] E. Alkali is added to the activated coal gangue microspheres, and the solid and liquid are separated to obtain activated coal ga...
experiment example 1
[0099] Experimental Example 1: Detection of heavy metal content of crops planted with coal gangue engineering soil described in Example 1:
[0100] The coal gangue engineering soil described in Example 1 was used to plant crops, including spinach, rapeseed and Artemisia stalks, according to national standards GB5009.12-2010, GB5009.15-2014, GB5009.17-2014, GB5009.11-2014 and GB5009 .123-2014 Detection of heavy metal content in three crops, the statistical results are as follows Figure 1~3 shown by Figure 1~3 It can be seen from the diagram that the coal gangue engineering soil prepared by the method of this application can be used as soil for planting crops. After the crops grow and bear fruit, the air, soil and groundwater around the crops themselves, their fruits, and the experimental base have been tested for a period of time. One year of monitoring, the test results show that the plants and fruits fully meet the national standards; the air, soil and groundwater around...
experiment example 2
[0109] Experimental example 2: temperature detection of coal gangue engineering soil mound:
[0110] The final product coal gangue engineering soil of Example 1 and Comparative Examples D3-D5 were piled up, and the temperature was measured after 10 days. The temperature measurement range of the sensor was 0-500°C, the temperature measurement accuracy was ±1°C, and the length of the measuring rod was 2m , the material of the probe is stainless steel, and the length of the probe is 10cm; As can be seen from Table 1, the temperature of the heap in Example 1 of the preferred embodiment of the present application is significantly lower than that of the raw powder of coal gangue, indicating that it emits less heat, and can greatly avoid heat accumulation in the later stage of accumulation process. The heating up of coal gangue and even the occurrence of spontaneous combustion will minimize the threat of coal gangue to the ecological environment, enterprise production safety and em...
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