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Abstract

The present invention discloses a mineral soil conditioner produced by coal ash and a preparation method thereof. The preparation method includes: (1) mixing coal ash with a heteroacid to form a mixture, stirring and filtering the mixture under the action of ultrasound to obtain a refined coal ash and a filtrate; (2) mixing the refined coal ash obtained in the step (1) with a calcium-based compound and a potassium-based compound well, performing drying with the residual heat of tail gas of a kiln after granulation; (3) performing calcination and activation continuously after granulation and drying in the step (2), then cooling, and processing by ball milling and molding to obtain a novel mineral soil conditioner. The present invention achieves the efficient utilization of a fuel coal by-product, namely, coal ash in agriculture and reduces the heavy metal content in coal ash and environmental contamination caused thereby.

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First Claim