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Method for producing fine ceramic by using waste ceramic as main material

A technology of fine ceramics and waste ceramics, applied in the field of ceramics manufacturing, can solve the problems of unstable sintering performance, limited application range, and reduced plasticity of the green body, and achieve the effect of soft color, wide application range, and bright glaze surface

Inactive Publication Date: 2019-04-02
JINGDEZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The ceramic industry produces a large amount of ceramic waste every year, which is difficult to use and can only be landfilled, which not only causes a huge waste of resources, but also causes environmental pollution
Although some people try to recycle them as raw materials for other industrial products, because the waste ceramics are sintered at high temperature, the waste ceramics become barren raw materials, and the glaze on the waste ceramics will also lead to unstable sintering performance and plasticity. It is greatly reduced, and its application range is greatly limited, especially in the production of fine ceramic products using waste ceramics as the main material, such as ceramic beads, ceramic jewelry and other fine electronic ceramic products, which require relatively high surface exquisiteness and fineness. Ceramic products, because such products have special requirements on the small size, water absorption, density, flexural strength, hardness and the range of adaptation to the glaze, the existing technical methods are difficult to achieve success

Method used

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  • Method for producing fine ceramic by using waste ceramic as main material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for producing fine ceramics with waste ceramics as the main material, specifically comprising the following steps:

[0023] a. Pulverization: First use a jaw crusher to crush large pieces of waste ceramics into coarse particles, then use a rolling mill to crush the coarse particles of waste ceramics into medium particles, and finally use a jet mill to crush the medium particles of waste ceramics into fine particles. Granules, mixed, passed through a 20-mesh sieve;

[0024] b. Purification: take a hydrochloric acid solution equivalent to 1.0 times the total weight of the waste ceramic fine particles and a concentration of 2.0 mol / L, add the waste ceramic fine particles into the dilute hydrochloric acid solution and soak for 1.0 h;

[0025] c. Adding additives: Based on the weight of waste ceramic powder, add 1% sodium pyrophosphate, a mixture of 2% calcium oxide and magnesium oxide (the mass ratio of calcium oxide and magnesium oxide is 1:1), 1% magnesium sulfat...

Embodiment 2

[0032] A method for producing fine ceramics with waste ceramics as the main material, specifically comprising the following steps:

[0033] a. Pulverization: First use a jaw crusher to crush large pieces of waste ceramics into coarse particles, then use a rolling mill to crush the coarse particles of waste ceramics into medium particles, and finally use a jet mill to crush the medium particles of waste ceramics into fine particles. Granules, mixed, passed through a 20-mesh sieve;

[0034] b. Purification: take a hydrochloric acid solution equivalent to 1.5 times the total weight of the waste ceramic fine particles and a concentration of 2.0 mol / L, add the waste ceramic fine particles into the hydrochloric acid solution and wash for 1.5 hours;

[0035] c. Adding additives: Based on the weight of waste ceramic powder, add a mixture of 3% sodium pyrophosphate, 5% silicon oxide and magnesium oxide (the mass ratio of silicon oxide and magnesium oxide is 1:2), 5% iron sulfate and A...

Embodiment 3

[0042] A method for producing fine ceramics with waste ceramics as the main material, specifically comprising the following steps:

[0043] a. Pulverization: First use a jaw crusher to crush large pieces of waste ceramics into coarse particles, then use a rolling mill to crush the coarse particles of waste ceramics into medium particles, and finally use a jet mill to crush the medium particles of waste ceramics into fine particles. Granules, mixed, passed through a 20-mesh sieve;

[0044] b. Purification: take a hydrochloric acid solution equivalent to 1.5 times the total weight of the waste ceramic fine particles and a concentration of 2.0mol / L, add the waste ceramic fine particles into the hydrochloric acid solution and soak for 1.0h;

[0045] c. Adding additives: Based on the weight of waste ceramic powder, add 2% sodium pyrophosphate, a mixture of 4% magnesium oxide and titanium oxide (the mass ratio of magnesium oxide and titanium oxide is 1:1), 3% iron sulfate and 0.15%...

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Abstract

The invention belongs to the technical field of ceramic manufacturing, and specifically discloses a method for producing fine ceramic by using waste ceramic as a main material. The method comprises the following concrete operation steps: a, crushing; b, purification; c, additive addition; d, drying; e, molding; f, processing of a green body; g, glazing; and h, glaze firing. The method for producing the fine ceramic by using the waste ceramic as the main material provided by the invention has the following advantage: the ceramic prepared by using the method provided by the invention has good appearance, high compression resistance and bending strength and excellent fracture toughness.

Description

technical field [0001] The invention belongs to the technical field of ceramic manufacturing, and specifically discloses a method for producing fine ceramics by using waste ceramics as the main material. Background technique [0002] The ceramic industry produces a large amount of ceramic waste every year, which is difficult to use and can only be landfilled, which not only causes a huge waste of resources, but also causes environmental pollution. Although some people try to recycle them as raw materials for other industrial products, because the waste ceramics are sintered at high temperature, the waste ceramics become barren raw materials, and the glaze on the waste ceramics will also lead to unstable sintering performance and plasticity. It is greatly reduced, and its application range is greatly limited, especially in the production of fine ceramic products using waste ceramics as the main material, such as ceramic beads, ceramic jewelry and other fine electronic ceramic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/13C04B41/86
CPCC04B33/1305C04B33/131C04B33/1324C04B41/009C04B41/5022C04B41/86C04B2235/3206C04B2235/3208C04B2235/3232C04B2235/3418C04B2235/447C04B2235/448C04B2235/483C04B2235/77C04B2235/96C04B2235/9607Y02P40/60
Inventor 喻斐
Owner JINGDEZHEN UNIV
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