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Preparation method of baking-free porous ceramsite with high percentage of closed porosity

A technology of high closed porosity and porous ceramics, which is applied in the field of solid waste recycling and materials, can solve the problems of adjusting the pore structure without considering decomposition, and achieve the effects of realizing solid waste recycling, reducing preparation costs, and simplifying the preparation process

Active Publication Date: 2021-05-14
贺州市坤德环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The essential difference from this patent is that: (a) the technology has undergone several steps such as "preparing the core - spraying the binder on the core - preparing the shell through granulation technology - decaying the organic matter in the core (1 to 3 months)", etc. (b) This technology does not use a foaming agent, so it does not consider adjusting the pore structure by promoting the decomposition of the foaming agent

Method used

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  • Preparation method of baking-free porous ceramsite with high percentage of closed porosity
  • Preparation method of baking-free porous ceramsite with high percentage of closed porosity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Select the mineral material in the construction waste, crush and initially grind to obtain about 100 mesh powder;

[0044] (2) Mix 44 parts of construction waste mineral materials, 20 parts of fly ash, and 1 part of gypsum, and grind the mixture to ~200 mesh;

[0045] (3) Take 15 parts of cement, mix the cement with the mixture obtained in (2) to obtain the granulated mixture, and divide it into 5 equal parts;

[0046] (4) Take 2 parts of ammonium bicarbonate 2; Take 8 parts of water, dissolve 2 parts of ammonium bicarbonate taken in water, obtain A solution, and divide the solution into 4 equal parts;

[0047] (5) Mole ratio is NH 4 + :OH - =1:4 Weigh calcium hydroxide, get 10 parts of water, dissolve calcium hydroxide in water to obtain B solution, and divide it into 4 equal parts;

[0048] (6) Take a portion of the granulation mixture obtained in (3) and place it in a granulator, take a portion of the A solution obtained in (4) and evenly spray it on the powd...

Embodiment 2

[0056] (1) Select the mineral materials in the construction waste, crush and primary grind to obtain ~100 mesh powder;

[0057] (2) Take 50 parts of construction waste mineral materials, 16 parts of fly ash, and 2 parts of gypsum to mix, and grind the mixture to about 200 meshes;

[0058] (3) Take 15 parts of cement, mix the cement with the mixture obtained in (2) to obtain the granulated mixture, and divide it into 5 equal parts;

[0059] (4) Take by weighing 0.5 part of ammonium chloride, 0.5 part of ammonium nitrate (counted as 1 part of blowing agent); Take by weighing 10 parts of water, dissolve 1 part of blowing agent taken by weighing in water, obtain A solution, and Divide the solution into 4 equal parts;

[0060] (5) Mole ratio is NH 4 + :OH - =1:2 Weigh sodium hydroxide, get 6 parts of water, dissolve sodium hydroxide in water to obtain B solution, and divide it into 4 equal parts;

[0061] (6) Take a portion of the granulation mixture obtained in (3) and place ...

Embodiment 3

[0069] (1) Select the mineral material in the construction waste, crush and initially grind to obtain about 100 mesh powder;

[0070] (2) Mix 40 parts of construction waste mineral materials, 22 parts of fly ash, and 3 parts of gypsum, and grind the mixture to ~200 mesh;

[0071] (3) Take 15 parts of cement, mix the cement with the mixture obtained in (2) to obtain the granulated mixture, and divide it into 5 equal parts;

[0072] (4) Take by weighing 0.5 part of ammonium bicarbonate, 0.5 part of ammonium acetate (counted as 1 part of blowing agent); Take by weighing 13 parts of water, dissolve 1 part of blowing agent taken by weighing in water, obtain A solution, and Divide the solution into 4 equal parts;

[0073] (5) Mole ratio is NH 4 + :OH - =1:2 Weigh sodium hydroxide, get 6 parts of water, dissolve sodium hydroxide in water to obtain B solution, and divide it into 4 equal parts;

[0074] (6) Take a portion of the granulation mixture obtained in (3) and place it in ...

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Abstract

The invention relates to the technical field of solid waste recycling and materials, in particular to a preparation method of baking-free porous ceramsite with high percentage of closed porosity, step-by-step granulation and step-by-step pore forming are realized by adopting a foaming agent and an inorganic substance for promoting decomposition of the foaming agent, rapid, uniform and thorough pore forming of a ceramsite inner core is promoted, and the porosity is improved; then, the porous inner core and the granulation mixture continue to be granulated, a wrapping layer is formed on the porous inner core, preparation and wrapping of the porous inner core are completed in one step, and the ceramsite with the structure of the porous inner core and the wrapping shell layer is obtained. Firstly, mineral solid waste such as construction waste, tailings and coal ash can be utilized as raw materials, and solid waste recycling is achieved; secondly, the porosity is high, and the thermal insulation performance is good; and finally, the inner core and the wrapping process are completed in one step during granulation, the process is simplified, and the preparation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of solid waste recycling and materials, in particular to a method for preparing non-fired porous ceramsite with high closed porosity rate. required building materials. Background technique [0002] Ceramsite is a traditional porous material. This rigid skeleton material has the advantages of safety, non-toxicity, fire resistance, weather resistance, earthquake resistance, corrosion resistance, light weight and high strength, thermal insulation, sound absorption and noise reduction, simple manufacturing process, etc., and has been widely used in the fields of thermal insulation of buildings. . Studies have shown that when ceramsite concrete is used as the building exterior wall, it can not only reduce the building energy consumption by ~35%, but also significantly reduce the building's self-weight and construction cost. [0003] The preparation methods of ceramsite include sintering method and unfired meth...

Claims

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Application Information

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IPC IPC(8): C04B18/02C04B18/16C04B18/08
CPCC04B18/027C04B18/021C04B18/16C04B18/08C04B22/143C04B22/106C04B22/064C04B22/124C04B22/085C04B22/062C04B24/12Y02W30/91Y02A30/244
Inventor 盘荣俊
Owner 贺州市坤德环保科技有限公司
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