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Method for preparing autoclaved fly ash brick through hydration with PO saponification waste residue, garbage power plant slag and coal-fired power plant fly ash

A technology of autoclaved fly ash bricks and fly ash water, which is applied in the directions of manufacturing tools, solid waste management, sustainable waste treatment, etc. Effects of benefits and environmental benefits

Inactive Publication Date: 2016-09-21
福建洋屿环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using cement to solidify and directly landfill fly ash will indirectly pollute groundwater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Accurately measure 16.03 ml of water, add 0.15 g Na 2 SO 4 , 0.50 g sodium rosinate, 0.15 g triethanolamine, 1.50gNa 2 SiO 3 , Stir to make it fully mixed, and a true solution that is close to homogeneity can be obtained. Then add 20.00 g of PO saponification waste slag, stir and mix evenly, then add 50.75 g of refuse power plant slag, 8.95 g of PO42.5 cement, and 2.00 g of coal-fired power plant fly ash in sequence, mix and stir evenly to make a slurry. The slurry was taken out, and the double-sided simple press method was used to repeatedly press it into a block of 70 mm × 50 mm × 20 mm. After the block rests for 24 hours, it is placed in an autoclaved reactor with a certain amount of water on the bottom layer, and it is not allowed to be in direct contact with water. After the reactor is heated to 230°C, start timing, keep the temperature for 8 hours, and then naturally cool to room temperature before discharging , that is, autoclaved fly ash bricks.

Embodiment 2

[0027] Accurately measure 17.03 ml of water, add 0.15 g Na 2 SO 4 , 0.50 g sodium rosinate, 0.15 g triethanolamine, 1.50gNa 2 SiO 3 , Stir to make it fully mixed, and a true solution that is close to homogeneity can be obtained. Then add 30.00 g of PO saponification waste slag, stir and mix evenly, then add 41.50 g of garbage power plant slag, 6.20 g of PO42.5 cement, and 3.00 g of coal-fired power plant fly ash in sequence, mix and stir evenly to make a slurry. The slurry was taken out, and the double-sided simple press method was used to repeatedly press it into a block of 70 mm × 50 mm × 20 mm. After the block rests for 24 hours, it is placed in an autoclaved reactor with a certain amount of water on the bottom layer, and it is not allowed to be in direct contact with water. After the reactor is heated to 240°C, start timing, keep the temperature for 9 hours, and then naturally cool to room temperature before discharging. , that is, autoclaved fly ash bricks.

Embodiment 3

[0029] Accurately measure 17.03 ml of water, add 0.150 g Na 2 SO 4 , 0.50 g sodium rosinate, 0.15 g triethanolamine, 1.50gNa 2 SiO 3 , Stir to make it fully mixed, and a true solution that is close to homogeneity can be obtained. Then add 20.00 g of PO saponification waste slag, stir and mix well, then add 48.20 g of garbage power plant slag, 8.50 g of PO42.5 cement, and 4.00 g of coal-fired power plant fly ash in sequence, mix and stir evenly to make a slurry. The slurry was taken out, and the double-sided simple press method was used to repeatedly press it into a block of 70 mm × 50 mm × 20 mm. After the block is rested for 24 hours, it is placed in an autoclaved reactor with a certain amount of water on the bottom layer, and it is not allowed to be in direct contact with water. After the reactor is heated to 250°C, start timing, keep the temperature for 8 hours, and then naturally cool to room temperature before discharging , that is, autoclaved fly ash bricks.

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Abstract

The invention discloses a method for preparing an autoclaved fly ash brick through hydration with PO saponification waste residue, garbage power plant slag and coal-fired power plant fly ash. The method is characterized in comprising the following steps: (1) 100g of concrete is prepared into a building block with a size of 70mm*50mm*20mm; (2) garbage power plant slag is crushed; slag particles with sizes of 2-3mm are selected as an aggregate of the concrete; (3) water is added for dissolving additive auxiliary materials including an activating agent Na2SiO3, early strength agents Na2SO4 and triethanolamine, and a dispersing agent sodium rosinate; the PO saponification waste residue is added; the garbage power plant slag, PO42.5 cement and coal-fired power plant fly ash are sequentially added; the mixture is well mixed, such that a slurry is prepared; (4) the slurry obtained in the step (3) is fetched and pressed into building blocks; (5) the building blocks obtained in the step (4) are allowed to stand for curing for 24h; (6) the building blocks obtained in the step (5) are steamed in an autoclave reactor, wherein the temperature is controlled at 230-250 DEG C and autoclave is carried out for 5-9h; the material is discharged after natural cooling; and (7) compression strength tests and flexural strength tests are carried out. According to the invention, the above three solid waste resources are used or preparing the autoclaved fly ash bricks, such that waste is turned valuable.

Description

technical field [0001] The invention relates to the technical field of comprehensive recovery and utilization of solid waste resources, in particular to a method for preparing autoclaved fly ash bricks by hydrating PO saponification waste slag, waste power plant slag and coal-fired power plant fly ash. Background technique [0002] PO saponification waste residue is a kind of waste discharged during the saponification process of propylene oxide (PO) produced by the chlorohydrin method. For every 1 t of propylene oxide produced, there are about 40 t of chlorine-containing saponification wastewater and 2 The waste residue of t is produced, and the output is relatively large, and there is no clear treatment method at present. PO saponification waste residue is gray-white gypsum, with very fine and uniform particles and light density, and has the characteristics of high alkalinity, high salt content and high COD. The main component of PO saponification waste residue is Ca(OH) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/10C04B18/08C04B18/04B28B11/24
CPCB28B11/24C04B18/0427C04B18/08C04B18/10C04B28/04C04B2111/00017C04B22/147C04B24/34C04B24/122Y02W30/91
Inventor 黄紫洋钟云峰钟云平邱妹妹蔡其旺李月霞
Owner 福建洋屿环保科技股份有限公司
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