Coal gangue based rice seedling raising matrix and production method

Abstract

The invention discloses a coal gangue based rice seedling raising matrix and a production method and relates to the technical field of resource-converting utilization of solid wastes of a coal mining process and production of seedling raising matrices. The production method for the coal gangue based rice seedling raising matrix comprises the following steps: A. carrying out matrix converting on coal gangue and B. preparing the coal gangue based rice seedling raising matrix, wherein the step A comprises the steps: (A1) crushing the coal gangue, and sieving the crushed coal gangue by a sieve with the pore size of 2mm; (A2) subjecting the sieved coal gangue with the grain size of 1mm to 2mm to calcination treatment for 2 hours at the treatment temperature of 720 DEG C to 750 DEG C; (A3) rapidly putting the calcined coal gangue into a dilute sulfuric acid solution with the pH value of 2 for cooling for 30 minutes, filtering out reacted coal gangue grains, and flushing the reacted coal gangue grains with clean water for 3 times; and (A4) soaking the flushed coal gangue with a 1.5% wetting-agent solution for 10 minutes, and baking the soaked coal gangue, thereby finishing a coal gangue matrix-converting process. The coal gangue based rice seedling raising matrix and the production method are mainly used for solving problems of the coal gangue in application in the field of agriculture and greatly lowering the consumption of peat.

Description

technical field [0001] The invention relates to the technical field of resource utilization of solid waste in the coal mining process and production of seedling-raising substrates, in particular to a coal gangue-based rice seedling-raising substrate and a production method. Background technique [0002] Coal gangue is a solid waste discharged during the coal production process. It is a rock with a lower carbon content and is harder than coal. The main components are aluminum oxide and silicon dioxide. The output of coal gangue in my country is huge. In 2015, the output of coal gangue was nearly 800 million tons, thus forming a large number of coal gangue hills and occupying a large amount of land resources. At present, the use of coal gangue is mainly for power generation, production of building materials, land reclamation and road construction, etc., and it is rarely used in the agricultural field. [0003] The rice seedling substrate is a new type of material in the rice ...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a coal gangue-based rice seedling raising substrate and a production method, which mainly solves the problem of coal gangue application in the agricultural field, and greatly reduces the amount of peat