Synergistic utilization of waste incineration fly ash and steel slag to prepare high-strength bricks

A waste incineration fly ash, high-strength technology, applied in the field of resource utilization of waste incineration fly ash, can solve the problems of high leaching concentration and low strength of heavy metals, achieve the effect of inhibiting hydrolysis and simple process

Active Publication Date: 2022-06-07
浙江中陶环保科技集团有限公司
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  • 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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  • Synergistic utilization of waste incineration fly ash and steel slag to prepare high-strength bricks
  • Synergistic utilization of waste incineration fly ash and steel slag to prepare high-strength bricks
  • Synergistic utilization of waste incineration fly ash and steel slag to prepare high-strength bricks

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Experimental program
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Effect test

Embodiment 1

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

[0028] The steel slag was ground for 1 hour to obtain steel slag powder. The blast furnace slag was ground 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 5:10:100, 5:15:100, 5:18:100, 2.5:20:100, 3.5:20:100, 4.5:20:100, 5: 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 Weigh steel slag powder, blast furnace slag powder, fly ash respectively, Mixed to obtain fly ash intermixed powder. According to the water-to-fly ash mixed powder water-cement ratio of 0.2:1, the water and fly ash mixed powder were respectively weighed, mixed, stirred evenly, put into a mold, and cured for 3 days to obta...

Embodiment 2

[0036] Influence of the mass ratio of sodium phosphate and sodium silicate on the strength and leaching concentration of heavy metals 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 25:60:100, respectively weigh steel slag powder, blast furnace slag powder and fly ash, and mix them to obtain fly ash mixed powder. According to the water and fly ash intermixed powder water-cement ratio of 0.35:1, respectively weigh water and fly ash intermixed powder, mix, stir evenly, put into a mold, and maintain for 5 days to obtain an anode assembly block. According to the mass ratios of sodium phosphate and sodium silicate of 2.5:100, 3.5:100, 4.5:100, 5:100, 10:100, 15:100, 15.5:100, 16.5:100, 17.5:100, weigh sodium phosphate and sodium silicate respect...

Embodiment 3

[0043] Influence of voltage on the strength and leaching concentration of heavy metals in the 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 25:60:100, respectively weigh steel slag powder, blast furnace slag powder and fly ash, and mix them to obtain fly ash mixed powder. According to the water-to-fly ash mixed powder water-cement ratio of 0.5:1, the water and fly ash mixed powder were respectively weighed, mixed, stirred evenly, put into a mold, and maintained for 7 days to obtain an anode assembly block. According to the mass ratio of sodium phosphate and sodium silicate of 15:100, respectively weigh sodium phosphate and sodium silicate, and mix them to obtain a silicon-phosphorus reagent. According to the mass-liquid ratio of silicon-phosphorus ...

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Abstract

The invention discloses a method for synergistically utilizing waste incineration fly ash and steel slag to prepare high-strength bricks, comprising the following steps: (1) grinding steel slag to obtain steel slag powder; (2) grinding blast furnace slag to obtain blast furnace slag powder; (3) mixing steel slag powder, blast furnace slag powder, and fly ash to obtain fly ash intermixing powder; (4) mixing water and fly ash intermixing powder, stirring evenly, putting into a mold, and curing to obtain an anode assembly block; (5) ) mixing sodium phosphate and sodium silicate to obtain silicon phosphorus reagent; (6) mixing silicon phosphorus reagent with water, stirring until sodium phosphate and sodium silicate are completely dissolved to obtain silicon phosphorus solution; (7) adding ethanol to silicon phosphorus (8) connect the anode assembly block to the anode and soak in the electrolyte solution, connect the DC power supply, activate, remove the anode assembly block, and maintain it to obtain high-strength bricks. The process of the invention is simple, and can be operated under normal temperature environment to realize the conversion of waste incineration fly ash into high-strength bricks.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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