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Technology utilizing steel slag and city domestic sludge to produce sustained-release silicon fertilizer

A kind of urban domestic sludge and slow-release technology, which is applied in the direction of sewage/sludge fertilizer, application, organic fertilizer, etc., can solve the problems of regional restrictions and inability to widely promote and use, and achieve enhanced external strength, easy storage and application , fast effect

Inactive Publication Date: 2016-08-03
XINJIANG ZHONGHE DAZHENG COMMERCE & TRADE
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

(3) Wang Li from Chongqing University stated in the middle of his master's thesis "Experimental Research on Solidifying Sludge from Urban Wastewater Treatment Plants Using Phosphogypsum, Fly Ash and Carbide Slag" that "Currently, the main treatment method for sludge is the main sanitary filling. Although there are many methods for burying, composting, incineration, putting into the ocean and agricultural use, each method will be restricted by many aspects such as regionality and economic conditions, and cannot be widely used

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0016] 1) Mix the iron-making slag with a mass percentage of 50% and the steel slag with a mass percentage of 10%, and use a ball mill to grind it to 250 mesh, add it to a disc pelletizer or a drum pelletizer, and then add a mass percentage Pelletizing 20% ​​wet domestic sludge;

[0017] 2) After the sphere is formed, add fly ash with a mass percentage of 20% to continue making the sphere, and after the sphere is dried until the moisture content thereof is less than 3%, it is discharged and packaged;

[0018] 3) Sell the finished spheres as fertilizer.

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Abstract

The invention discloses a technology utilizing steel slag and city domestic sludge to produce a sustained-release silicone fertilizer. The technology comprises the following steps: mixing 50 wt% of iron smelting slag and 10 wt% of steel slag, then finely grinding the mixture by a ball mill until the particle size reaches 250 meshes, adding the powder into a disc-type pelletizing machine or a roller pelletizing machine; then adding 20 wt% of damp domestic sludge, carrying out pelletizing; after pellets are formed, adding 20 wt% of fly ash, keeping on pelletizing, drying pellets until the water content is less than 3%, discharging the pellets, packaging, and selling the pellets as fertilizer.

Description

technical field [0001] The invention relates to a process for producing slow-release silicon fertilizer by using steel slag and urban domestic sludge. Background technique [0002] Municipal sludge originates from the municipal wastewater treatment process. According to the sewage treatment method, the biological solids of municipal domestic sludge can be divided into four categories: (1) primary sludge. Refers to the sediment produced in the primary treatment of sewage; (2) Activated sludge, the sludge from the secondary sedimentation tank of the biochemical treatment system, after deducting the part that returns to the aeration tank. The remaining part is called residual activated sludge; (3) digested sludge, the sludge produced after anaerobic digestion of biological sludge is called digested sludge; (4) chemical sludge refers to chemically enhanced primary treatment ( or tertiary treatment) sludge generated after. The output of urban sludge is huge and its composition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05D9/00C05F7/00
CPCC05D9/00C05G3/00C05F7/00Y02A40/20
Inventor 吴汉元
Owner XINJIANG ZHONGHE DAZHENG COMMERCE & TRADE
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