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Magnesium-rich nickel slag geopolymer porous material and preparation method thereof

A technology of geopolymer and magnesium-nickel slag, which is applied in the fields of ceramic products, solid waste management, sustainable waste treatment, etc., can solve the problems of adverse impact on the ecological environment, polluted soil and groundwater, and large land occupation, and achieves the goal of promoting Reasonable utilization and environmental protection, high utilization rate of solid waste and low production cost

Pending Publication Date: 2022-04-05
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of ferronickel slag is piled up and landfills occupy a large area, and pollute the soil and groundwater due to the leaching of heavy metals, which in turn has an adverse impact on the ecological environment

Method used

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  • Magnesium-rich nickel slag geopolymer porous material and preparation method thereof

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preparation example Construction

[0042]A preparation method of magnesium-rich nickel slag geopolymer porous material, comprising the following steps:

[0043] S1, put the raw material (particle diameter<3mm) of preliminary crushing into ball mill and grind, pass 200 mesh sieves after grinding to obtain the required fineness raw material;

[0044] S2, mixing the foam stabilizer and water to prepare a mixed solution;

[0045] S3, mixing the activator and the mixed solution to prepare the activator mixed solution;

[0046] S4. Add the activator solution to the uniformly mixed magnesium-nickel slag and fly ash, stir and mix to obtain a clean slurry;

[0047] S5, mixing the clean pulp and foaming agent to prepare foam homogenate;

[0048] S6. The homogenate is poured into a mold of 100 mm×100 mm×100 mm for molding, and then cured to obtain a porous material of green solid waste.

[0049] Further, after solidification and molding in the step S6, the mold poured with the clean slurry is sealed and then placed in ...

Embodiment 1

[0054] This embodiment provides a green porous material based on magnesium-rich nickel slag and fly ash. The contents of each component of the porous material are: 70-90% for magnesium-rich nickel slag and 10-30% for fly ash 10-40% of activator (phosphoric acid), 20-40% of deionized water, 0.1-10% of foaming agent (hydrogen peroxide), and 0.1-2% of foam stabilizer (sodium lauryl sulfate).

[0055] The green porous material based on magnesium-rich nickel slag and fly ash is obtained through the following steps:

[0056] Powder refinement: put the magnesium-nickel slag and fly ash in an oven, and bake until the quality does not change. After cooling to room temperature, the magnesium-nickel slag is ball-milled with a ball mill, and then passed through a 200-mesh sieve, and the fly ash is directly Pass 200 mesh sieve;

[0057] Prepare mixed solution: foam stabilizer and water are mixed with mixed solution, after cooling for subsequent use;

[0058] Preparation of activator solu...

Embodiment 2

[0063] This embodiment provides a green porous material based on magnesium-rich nickel slag and fly ash, the content of each component of the porous material is respectively: 50-70% of magnesium-rich nickel slag, 30-50% of fly ash , activator (NaOH) 10-40% (solid content), deionized water 20-40%, foaming agent (aluminum powder) 0.1-10%, foam stabilizer (sodium lauryl sulfate) 0.9-3% .

[0064] The green porous material based on magnesium-rich nickel slag and fly ash is obtained through the following steps:

[0065] Powder refinement: put the magnesium-nickel slag and fly ash in an oven, and bake until the quality does not change. After cooling to room temperature, the magnesium-nickel slag is ball-milled with a ball mill, and then passed through a 200-mesh sieve, and the fly ash is directly Pass 200 mesh sieve;

[0066] Prepare mixed solution: foam stabilizer and water are mixed with mixed solution, after cooling for subsequent use;

[0067] Preparation of activator solutio...

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Abstract

The invention discloses a magnesium-rich nickel slag geopolymer porous material and a preparation method thereof. The magnesium-rich nickel slag geopolymer porous material comprises 500-900 parts of magnesium-rich nickel slag, 100-500 parts of fly ash, 100-400 parts of an exciting agent, 200-400 parts of water, 1-100 parts of a foaming agent and 1-30 parts of a foam stabilizer. The exciting agent comprises Na2SiO3, NaOH and phosphoric acid, and when the exciting agent is NaOH, the part of the exciting agent in the total raw materials is the part of pure NaOH; when the exciting agent comprises Na2SiO3 and NaOH, the part of the exciting agent in the total raw materials is the sum of the parts of pure Na2SiO3 and NaOH; when the exciting agent comprises phosphoric acid, the part of phosphoric acid in the total raw materials is the part of pure phosphoric acid. According to the invention, the foaming agent and the foam stabilizer are used for preparing the porous material, and the method has the advantages of simple processing technology, environmental protection, low energy consumption and low cost, and can show large porosity and good compressive strength.

Description

technical field [0001] The invention relates to the technical field of resource utilization of industrial solid waste, in particular to a magnesium-nickel slag geopolymer porous material and a preparation method thereof. Background technique [0002] With the continuous increase of global stainless steel production, China's annual output of ferronickel slag exceeds 30 million tons, accounting for more than 20% of the global output of ferronickel slag. A large amount of ferronickel slag is piled up and landfilled, and it will pollute the soil and groundwater due to the leaching of heavy metals, which will have an adverse impact on the ecological environment. The increasingly prominent pollution problem caused by nickel slag has promoted the continuous progress of related research. my country's nickel ore is mainly silicon-rich and magnesium-rich laterite nickel ore, and the discharged nickel-iron slag has the characteristics of high magnesium content. The increasingly promi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/02C04B18/14
CPCY02P40/10Y02W30/91
Inventor 王觅堂杨兴春张栋梁张晓伟
Owner UNIV OF SHANGHAI FOR SCI & TECH
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