Technology for producing flower fertilizer by means of metallurgical slag

Abstract

The invention discloses a technology for producing a flower fertilizer by means of metallurgical slag.The method comprises the steps that 50% by weight of iron-smelting slag and 10% by weight of steel slag are subjected to magnetic separation to remove heavy metal compounds; the iron-smelting slag and steel slag are milled through a ball mill till the particle size is 200 meshes, and then the materials are added into a disc pelletizer or a drum pelletizer; 30% by weight of dried domestic sludge is added, mixing and sterilizing are conducted, after mixing and sterilizing are conducted for 8 h, 10% by weight of calcium bentonite is added into the mixture, the materials are mixed and then packed, and the packed materials serve as a chemical fertilizer or nutrient soil of flowers and vegetables, wherein the moisture rate of the domestic sludge is smaller than 3%.

Description

technical field [0001] The invention relates to a process for producing flower fertilizer by utilizing metallurgical slag. Background technique [0002] The cultivation of flowers and vegetables in the family generally uses nutrient soil, peat soil, mixed soil, etc. After a period of use, the growth of flowers and vegetables absorbs various mineral elements in the soil matrix, which are used for protein synthesis in the process of plant growth. The transformation of plant photosynthesis, etc., becomes the organic matter of plants, which makes the fertilizer in the soil decrease year by year. Therefore, household potted plants, vegetables and flowers need to change the soil or use chemical fertilizers every year to ensure the normal growth of potted plants. [0003] Literature review: (1) Lu Jiwen of Southwest University’s master’s thesis in 2008: “Research on the Application of Urban Sludge Compost in Flower Cultivation” included “Substrate for Container Seedlings” (Li Yanxi...

AI Technical Summary

Problems solved by technology

Global peat soil resources are limited and cannot be renewed in a short time

Swamp peat soils can fix atmospheric CO 2 , a large amount of peat soil mining will make atmospheric CO 2 Concentration rises, which warms the earth, so the application is limited

In my country, forest humus is often used instead, but it destroys the surface soil in forest areas, easily leads to soil erosion, and the collection and transportation costs are also high