Formula and method for preparing mineral composite bacterial fertilizer by using coal gangue

Abstract

The invention discloses a formula for preparing a mineral composite bacterial fertilizer by using coal gangue. The mineral composite bacterial fertilizer comprises the following components in parts byweight: 20 parts of coal gangue, 15-20 parts of limestone or phosphogypsum, 1-2 parts of an assistant and 10-20 parts of a bacterial solution. The invention further discloses a method for preparing the mineral composite bacterial fertilizer by utilizing coal gangue. The preparation method comprises the following steps: S1, testing raw materials; S2, crushing the raw materials; S3, carrying out proportioning; S4, carrying out mixing; S5, carrying out forming; S6, carrying out thermal activating; S7, carrying out quenching; S8, carrying out drying; S9, carrying out crushing; S10, fixing the bacterial solution; and S11, carrying out secondary drying. According to the composite bacterial fertilizer disclosed by the invention, powder is changed into an amorphous activated material through thermal activation; after fertilization is carried out, the activated material can be converted into aluminum ore ions to supplement trace elements in soil; and the content of beneficial bacteria in the soil can be increased through the fixed bacterial solution, so that decomposition of soil organic matter and conversion of nutrients are promoted, the utilization rate of the fertilizer is increased, and plant growth is promoted.

Description

technical field [0001] The invention relates to the technical field of preparing mineral compound bacterial fertilizer from coal gangue, in particular to a formula for preparing mineral compound bacterial fertilizer by using coal gangue and a preparation method thereof. Background technique [0002] Coal gangue is a solid industrial waste produced during coal mining and processing, which contains a variety of mineral components. Among them, the content of kaolin and quartz accounts for more than 50%, and may also contain illite, chlorite, muscovite, feldspar, pyrite, siderite, hematite, calcite and other crystal phase minerals. Among them, kaolinite, illite, chlorite, muscovite, and feldspar belong to aluminous clay minerals, all of which have good adsorption properties. The main chemical components of coal gangue include AL2O3, SiO2, CaO, MgO, Fe2O3, K2O and Na2O. The contents of these chemical components fluctuate greatly depending on the geological age and region of the...

AI Technical Summary

Problems solved by technology

The traditional treatment methods of coal gangue are used to make bricks, generate electricity or build roads, and the calorific value of coal gangue in some areas is relatively low, which is not suitable for power generation, such as: Sichuan. Therefore, the problem of coal gangue has seriously affected the Normal operation of coal mine

[0004] Coal gangue contains a variety of mineral components. These mineral components are all mineral components required for mineral fertilizers. However, my country has not yet conducted in-depth research on using coal gangue as a mineral fertilizer.