Method for hydration preparation of autoclaved fly ash-lime brick from PO saponification waste residues, garbage power plant slag and fly ash

A technology for autoclaved fly ash bricks and power plants, applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve rare problems, achieve simple process, high social benefits and environmental protection Benefits, the effect of realizing environmental benefits

Inactive Publication Date: 2016-09-07
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

However, there are still few reports on the comprehensive application of fly ash as aggregate in autoclaved fly ash bricks.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Accurately measure 16.03 ml of water, add 1.50 g of Na 2 SO 4 , 0.50 g sodium rosinate, 0.15 g triethanolamine, 0.15gNa 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 residue, stir and mix evenly, then add 43.94 g of garbage power plant slag, 7.76 g of PO42.5 cement, and 10.00 g of 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 directly contact with water. After the reactor is heated to 185°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

[0026] Accurately measure 17.03 ml of water, add 1.50 g of Na 2 SO 4 , 0.50 g sodium rosinate, 0.15 g triethanolamine, 0.15gNa 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 38.89 g of garbage power plant slag, 5.81 g of PO42.5 cement, and 6.00 g of 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, put it in an autoclaved reactor with a certain amount of water on the bottom layer, and do not directly contact with water. After the reactor is heated to 175°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

[0028] Accurately measure 17.03 ml of water, add 1.50 g of Na 2 SO 4 , 0.50 g sodium rosinate, 0.15 g triethanolamine, 0.15gNa 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 residue, 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 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 195°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 hydration preparation of an autoclaved fly ash-lime brick from PO saponification waste residues, garbage power plant slag and fly ash. The method comprises 1, preparing building blocks with the size of 70mm*50mm*20mm from 100g of concrete, 2, breaking and screening garbage power plant slag and selecting slag with particle sizes of 2-3mm as a concrete aggregate, 3, dissolving additive accessory materials such as sodium silicate as an activator, sodium sulfate and triethanolamine as early strength agents and sodium abietate as a dispersant through a certain amount of water, adding PO saponification waste residues into the solution, orderly adding garbage power plant slag, PO42.5 cement and fly ash into the solution and fully stirring the mixture to obtain slurry, 4, taking out the slurry and carrying out repeated compaction to obtain fly ash building blocks, 5, standing to maintain the fly ash building blocks obtained by the step 4 for 24h, and 6, steaming the fly ash building blocks through an autoclaved reaction kettle with water in the bottom layer at a temperature of 165-195 DEG C for 5-9h, carrying out natural cooling to the room temperature and discharging the products. The autoclaved fly ash-lime brick realizes change of waste into valuables.

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 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) 2 and CaCl 2 , equival...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/04C04B18/10C04B18/08
CPCC04B18/0481C04B18/088C04B18/10C04B28/04C04B2201/50C04B22/147C04B24/34C04B24/122C04B22/08Y02W30/91
Inventor 黄紫洋钟云峰钟云平邱妹妹李月霞
Owner 福建洋屿环保科技股份有限公司
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