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Method for preparing foamed ceramic with nickel slag and pulverized biomass

A technology of foamed ceramics and biomass powder, which is applied in the preparation of lightweight foamed ceramics and the field of preparation of lightweight foamed ceramics, which can solve the problems of difficult recycling of nickel slag and high cost of foamed ceramics, and achieve thermal insulation performance Excellent, environmental protection, and the effect of reducing production costs

Active Publication Date: 2016-12-07
射阳县射阳港渔工贸开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention not only can obtain foamed ceramics with high performance, but also solves the problem of difficult recycling of nickel slag in the prior art, and solves the problem of high cost of foamed ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Raw material preparation: wash, dry, and grind rice husks to prepare rice husk powder; grind nickel slag finely with a jaw crusher and a planetary ball mill, and pass through a 120-mesh sieve to obtain powder;

[0028] Mixing: Weigh nickel slag, lithium slag, and fly ash according to the mass ratio of 45:12:43, mix them evenly with 25 parts of rice husk powder and 4 parts of anhydrite, add 10% polyvinyl alcohol (5wt%), grind Granulating, crossing a 120 mesh sieve to obtain a billet;

[0029] Forming: mold the blank under 7MPa to obtain the green body;

[0030] Firing: After drying the green body, put it into a sagger filled with alumina powder, put the sagger in a high-temperature furnace, raise the temperature to 1450°C and keep it for 90 minutes to obtain lightweight foamed ceramics.

[0031] Performance test: The measured bulk density of the foamed ceramic material is 0.21g / cm 3 , its compressive strength is 5.43MPa, and its thermal conductivity is 0.295W / (m·℃).

Embodiment 2

[0033] Raw material preparation: wash, dry and grind corn stalks to prepare corn stalk powder; grind nickel slag finely with a jaw crusher and a planetary ball mill, and pass through a 120-mesh sieve to obtain powder;

[0034] Mixing materials: Weigh nickel slag, lithium slag, silicon-manganese slag according to the mass ratio of 72:21:7, mix evenly with 30 parts of corn flour, 3 parts of silicon carbide and 3 parts of sodium sulfate, add 15% polyvinyl alcohol (5wt %) solution, ground and granulated, and crossed a 120 mesh sieve to obtain a billet;

[0035] Molding: Molding the blank under 10MPa to obtain the green body;

[0036] Firing: After the green body is dried, it is put into a sagger filled with alumina powder, and the sagger is placed in a high-temperature furnace, and the temperature is raised to 1600°C for 120 minutes to obtain lightweight foamed ceramics.

[0037] Performance test: The measured bulk density of the foamed ceramic material is 0.35g / cm 3 , its compr...

Embodiment 3

[0039] Raw material preparation: wash, dry, and grind cotton stalks to prepare cotton stalk powder; grind nickel slag finely with a jaw crusher and a planetary ball mill, and pass through a 120-mesh sieve to obtain powder;

[0040]Mixing: Weigh nickel slag, lithium slag, silicomanganese slag, and aluminum sulfate slag according to the mass ratio of 27:23:15:35, and weigh 15 parts of cotton stalk powder, 1 part of manganese dioxide, and add 32% of water Grinding to form a slurry;

[0041] Forming: inject the slurry into the plaster model, dehydrate and form, and then dry the green body below 150°C.

[0042] Firing: After the green body is dried, it is put into a sagger filled with alumina powder, and the sagger is placed in a high-temperature furnace, and the temperature is raised to 1300°C for 60 minutes to obtain lightweight foamed ceramics.

[0043] Performance test: The measured bulk density of the foamed ceramic material is 0.45g / cm 3 , its compressive strength is 1.98MP...

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Abstract

The invention discloses a method for preparing lightweight foamed ceramic with nickel slag and pulverized biomass. The method includes the following steps: mixing, by mass, 27-72 parts of nickel slag, 28-73 parts of aluminium silicon waste slag, 15-30 parts of pulverized biomass and 1-6 parts of foaming agent prior to uniform blending and forming to obtain green bodies; putting the green bodies into a high temperature furnace for sintering, and cooling to room temperature to obtain the lightweight foamed ceramic.

Description

technical field [0001] The invention belongs to the technical field of inorganic material preparation and also belongs to the technical field of solid waste utilization. The invention relates to a method for preparing lightweight foamed ceramics, in particular to a method for preparing lightweight foamed ceramics by utilizing nickel slag and biomass powder. Background technique [0002] Nickel slag refers to a kind of industrial waste slag discharged during the nickel metal smelting process, that is, the granulated slag formed after the melt formed in the nickel smelting process is quenched by water. According to statistics, the cumulative accumulation of nickel slag in my country has exceeded 10 million tons. These slags contain SiO 2 , Fe 2 o 3 In addition to MgO, it also contains various heavy metal elements such as chromium, lead, copper and zinc. During the process of accumulation and landfill disposal, elements such as chromium, lead, copper, and zinc enter the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B38/02C04B33/138C04B33/135
CPCC04B33/138C04B38/0675C04B2235/96C04B2235/9607C04B33/1352C04B38/02C04B38/0067Y02P40/60
Inventor 郭伟刘甜甜蒋金海
Owner 射阳县射阳港渔工贸开发有限公司
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