Cu<2+> sustained-release functional core-shell light aggregate and preparation method thereof

A functional, lightweight aggregate technology, applied in botany equipment and methods, planting substrates, water/sewage treatment with additives, etc., can solve the problems of lack of lightweight aggregates and low utilization rate of solid waste such as sludge , achieve the effects of important economy, improving sewage treatment capacity, promoting growth and metabolism

Active Publication Date: 2020-01-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a Cu 2+ Slow-release functional core-shell lightweight aggregates to solve the problems of lack of lightweight aggregates for plant hydroponics and low utilization rate of solid waste such as sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a Cu 2+ The slow-release functional core-shell light aggregate includes an inner core and an outer shell; the mass ratio of the inner core and the outer shell is 1:1, wherein, in terms of mass percentage, the raw material composition of the inner core is: carbonized sludge: 75%, magnesium phosphate cement: 10%, Potassium Sulfate: 2%, Manganese Nitrate: 4%, Sodium Chloride: 4%, Copper Sulfate: 5%; in terms of mass percentage, the raw material composition of the shell is: magnesium phosphate cement: 90%, borax: 10% .

[0030] The above Cu 2+ The slow-release functional core-shell light aggregate is specifically prepared by the following methods:

[0031] 1) According to the above raw material ratio, mix the sludge with magnesium phosphate cement, potassium sulfate, manganese nitrate, sodium chloride, copper sulfate and add water to mix evenly, and then granulate into balls through a ball forming machine. During the granulation process , the rotating speed of the ball f...

Embodiment 2

[0037] a Cu 2+ The slow-release functional core-shell light aggregate includes an inner core and an outer shell; the mass ratio of the inner core and the outer shell is 1:1, wherein, in terms of mass percentage, the raw material composition of the inner core is: carbonized sludge: 70%, magnesium phosphate cement: 8%, Potassium Sulfate: 3%, Manganese Nitrate: 4%, Sodium Chloride: 5%, Copper Sulfate: 10%; in terms of mass percentage, the raw material composition of the shell is: magnesium phosphate cement: 95%, borax: 5% .

[0038] The above Cu 2+ The slow-release functional core-shell light aggregate is specifically prepared by the following methods:

[0039] 1) According to the above raw material ratio, mix the sludge with magnesium phosphate cement, potassium sulfate, manganese nitrate, sodium chloride, copper sulfate and add water to mix evenly, and then granulate into balls through a ball forming machine. During the granulation process , the rotating speed of the ball fo...

Embodiment 3

[0045] a Cu 2+ The slow-release functional core-shell light aggregate includes an inner core and an outer shell; the mass ratio of the inner core and the outer shell is 1:1, wherein, in terms of mass percentage, the raw material composition of the inner core is: carbonized sludge: 80%, magnesium phosphate cement: 5%, Potassium Sulfate: 2%, Manganese Nitrate: 4%, Sodium Chloride: 4%, Copper Sulfate: 5%; by mass percentage, the raw material composition of the shell is: magnesium phosphate cement: 94%, borax: 6% .

[0046] The above Cu 2+ The slow-release functional core-shell light aggregate is specifically prepared by the following methods:

[0047] 1) According to the above raw material ratio, mix the sludge with magnesium phosphate cement, potassium sulfate, manganese nitrate, sodium chloride, copper sulfate and add water to mix evenly, and then granulate into balls through a ball forming machine. During the granulation process , the rotating speed of the ball forming mach...

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Abstract

The invention provides Cu<2+> sustained-release functional core-shell light aggregate and a preparation method thereof. The Cu<2+> sustained-release functional core-shell light aggregate includes an inner core and an outer shell, wherein the mass ratio of the inner core to the outer shell is (1:1)-(2:1), in terms of mass percentages, the inner core includes the following components: 70%-80% of carbonized sludge, 5%-15% of magnesium phosphate cement, 2%-5% of potassium sulfate, 3%-8% of manganese nitrate, 4%-7% of sodium chlorine and 5%-10% of copper sulfate, and the outer shell includes the following components: in percent by mass, 80%-95% of magnesium phosphate cement and 5%-10% of borax. Sludge and the magnesium phosphate cement are adopted as main raw materials, and inorganic salt phytonutrients and copper sulfate are added so as to prepare the inner core; then the magnesium phosphate cement is adopted as a main raw material, and the retarder borax is added so as to prepare the outer shell; then the inner core is covered with the outer shell so as to form the Cu<2+> sustained-release functional core-shell light aggregate which is suitable for hydroponics of plants and has a high-efficiency water-purifying function, the resource utilization rate of sludge and other solid waste is improved greatly, and economic, environmental and scientific significance is achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a Cu 2+ A slow-release functional core-shell light aggregate and a preparation method thereof. Background technique [0002] At present, the hydroponic plant market and sewage treatment have broad prospects, and there are few special products to choose from. Lightweight aggregates are widely used in many fields. Due to their certain porosity and permeability, they are used in the restoration of natural water bodies and plant hydroponics, but the combined application of the two is less, and its products are slow-release. no significant effect. In addition, with the development of mineral resources and the large amount of solid waste generated from river sludge, serious environmental and social problems have been brought about. [0003] Therefore, it is of great significance to develop a light aggregate that is not only suitable for plant hydroponics, but also can pur...

Claims

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Application Information

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IPC IPC(8): C04B28/34C02F1/68A01G24/10
CPCA01G24/10C02F1/68C04B28/344C04B2111/00758C04B2201/50C04B18/0418C04B22/147C04B22/085C04B22/124C04B22/142C04B22/0013
Inventor 蹇守卫高文斌李宝栋吴任迪黄伟超
Owner WUHAN UNIV OF TECH
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