Method for preparing high-strength brick by synergistically utilizing waste incineration fly ash and steel slag

A waste incineration fly ash and high-strength technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of low strength and high concentration of heavy metal leaching, and achieve the effect of inhibiting hydrolysis and simple process

Active Publication Date: 2021-10-15
浙江中陶环保科技集团有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for synergistically utilizing waste incineration fly ash and steel slag to prepare high-strength bricks, so as to solve the problems of low strength and high heavy metal leaching concentration in unburned bricks prepared by waste incineration fly ash in the prior art

Method used

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  • Method for preparing high-strength brick by synergistically utilizing waste incineration fly ash and steel slag
  • Method for preparing high-strength brick by synergistically utilizing waste incineration fly ash and steel slag
  • Method for preparing high-strength brick by synergistically utilizing waste incineration fly ash and steel slag

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Experimental program
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Effect test

Embodiment 1

[0027] Effect of mass ratio of steel slag powder, blast furnace slag powder and fly ash on strength and heavy metal leaching concentration of high-strength bricks prepared

[0028] The steel slag was ground for 1 hour to obtain steel slag powder. Grinding blast furnace slag for 1 hour to obtain blast furnace slag powder. According to the mass ratio of steel slag powder, blast furnace slag powder and fly ash: 20:100, 5:40:100, 5:60:100, 15:20:100, 15:40:100, 15:60:100, 25:20:100, 25:40:100, 25:60: 100, 26:60:100, 28:60:100, 30:60:100, 25:62:100, 25:65:100, 25:70:100 respectively weigh steel slag powder, blast furnace slag powder, fly ash, Mix to obtain fly ash intermixed powder. According to the water-cement ratio of 0.2:1, the water and fly ash intermixed powder were weighed, mixed, stirred evenly, put into a mold, and cured for 3 days to obtain an anode assembly block. Weigh sodium phosphate and sodium silicate respectively according to the mass ratio of sodium phosphate ...

Embodiment 2

[0036] Effect of mass ratio of sodium phosphate and sodium silicate on the strength and heavy metal leaching concentration of the prepared high-strength bricks

[0037] The steel slag was ground for 3.5 hours to obtain steel slag powder. The blast furnace slag was ground for 3.5 hours to obtain blast furnace slag powder. According to the mass ratio of steel slag powder, blast furnace slag powder and fly ash of 25:60:100, respectively weigh steel slag powder, blast furnace slag powder and fly ash, and mix them to obtain fly ash intermixed powder. According to the ratio of 0.35:1 water and fly ash intermixed powder water and fly ash intermixed powder were weighed, mixed, stirred evenly, molded, cured for 5 days, to obtain the anode assembly block. Weigh sodium phosphate and Sodium silicate, mixed to obtain silicon phosphorus reagent. Weigh the silicon-phosphorus reagent and water according to the mass-liquid ratio of the silicon-phosphorus reagent to water 40:100g:mL, mix and...

Embodiment 3

[0043] Effect of voltage on strength and heavy metal leaching concentration of prepared high-strength bricks

[0044] The steel slag was ground for 6 hours to obtain steel slag powder. The blast furnace slag was ground for 6 hours to obtain blast furnace slag powder. According to the mass ratio of steel slag powder, blast furnace slag powder and fly ash of 25:60:100, respectively weigh steel slag powder, blast furnace slag powder and fly ash, and mix them to obtain fly ash intermixed powder. Weigh the water and fly ash intermixed powder according to the ratio of 0.5:1 to water and fly ash intermixed powder, mix, stir evenly, put into the mold, and maintain for 7 days to obtain the anode assembly block. Weigh sodium phosphate and sodium silicate respectively according to the mass ratio of sodium phosphate and sodium silicate of 15:100, and mix them to obtain silicon phosphorus reagent. Weigh the silicon-phosphorus reagent and water according to the mass-liquid ratio of the si...

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Abstract

The invention discloses a method for preparing a high-strength brick by synergistically utilizing waste incineration fly ash and steel slag, the method comprises the following steps: (1) grinding the steel slag to obtain steel slag powder; (2) grinding blast furnace slag to obtain blast furnace slag powder; (3) mixing the steel slag powder, the blast furnace slag powder and the fly ash to obtain fly ash mixed powder; (4) mixing water and the fly ash mutual doping powder, uniformly stirring, putting into a mold, and curing to obtain an anode assembly block; (5) mixing sodium phosphate and sodium silicate to obtain a silicon phosphorus reagent; (6) mixing a silicon-phosphorus reagent with water, and stirring until sodium phosphate and sodium silicate are completely dissolved to obtain a silicon-phosphorus solution; (7) adding ethanol into the silicon-phosphorus solution to obtain an electrolyte; and (8) connecting the anode assembly block to an anode, soaking the anode assembly block in the electrolyte, connecting a direct-current power supply, activating, taking down the anode assembly block, and maintaining to obtain the high-strength brick. The process is simple, and the waste incineration fly ash can be converted into the high-strength bricks through operation in a normal-temperature environment.

Description

technical field [0001] The invention belongs to the field of waste incineration fly ash resource utilization, in particular to a method for synergistically utilizing waste incineration fly ash and steel slag to prepare high-strength bricks. Background technique [0002] With the rapid development of the economy and the continuous expansion of cities, the amount of garbage generated in the lives of residents has increased exponentially. It is estimated that the amount of domestic garbage generated in the next five years will reach a staggering 400 million tons. At present, there are three main ways to deal with domestic waste in my country, including landfill, composting, and incineration. Among them, incineration treatment can greatly reduce the volume of domestic waste, reduce land occupation pressure, and supply electric energy at the same time. It has gradually become the most popular way of domestic waste disposal. In 2019 alone, my country plans to build 600 waste inci...

Claims

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Application Information

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IPC IPC(8): C04B28/00C25B1/01
CPCC04B28/006C25B1/01C04B2201/52C04B22/16C04B12/04Y02W30/91
Inventor 黄涛宋东平张树文冯迪峰贺永宝
Owner 浙江中陶环保科技集团有限公司
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