Search

CN-121974660-A - High-strength household environment-friendly ceramic and preparation method thereof

CN121974660ACN 121974660 ACN121974660 ACN 121974660ACN-121974660-A

Abstract

The invention discloses high-strength household environment-friendly ceramic and a preparation method thereof, wherein the preparation method comprises the following steps of S1, preparation of modified red mud, S2, preparation of modified gangue powder, S3, preparation of ceramic raw materials, S4, preparation of environment-friendly glaze slurry and S5, preparation of high-strength environment-friendly ceramic. The invention uses high proportion industrial solid waste as main raw material, successfully prepares the high performance daily ceramic with high mechanical strength and excellent environmental protection property by a method of multicomponent synergistic modification and in-situ self-generation of enhanced crystalline phase, converts traditional low efficiency inert waste such as red mud, coal gangue and the like into in-situ precursor of enhanced phase in ceramic matrix, solves the technical problems of frosting, cracking, low strength and the like which are easy to occur in the ceramic with high solid waste doping amount, has reasonable process route design and low cost, changes waste into valuables, and provides a brand new solution with practical industrialization prospect for high-value utilization of large amount of industrial solid waste.

Inventors

  • WANG RONGFA
  • WANG RONGMING
  • YE YONGQUAN
  • LUO QIAOLI

Assignees

  • 福建省德化荣盛达陶瓷有限公司

Dates

Publication Date
20260505
Application Date
20260409

Claims (10)

  1. 1. The preparation method of the high-strength household environment-friendly ceramic is characterized by comprising the following steps of: s1, washing red mud to remove impurities, adding the red mud into a phytic acid aqueous solution, stirring the mixture under an ultrasonic condition for reaction, and filtering and drying the reaction product to obtain modified red mud; S2, uniformly mixing coal gangue and rice hull ash to obtain mixed powder, then adding sodium hydroxide solution into the mixed powder, and performing ball milling to obtain pretreated powder; S3, uniformly mixing albite, waste glass powder, wollastonite, modified coal gangue and modified red mud to obtain green body powder, then adding a bio-based grinding aid and water, performing wet ball milling, sieving to remove iron to obtain slurry, performing grouting or press molding, and drying to obtain a ceramic green body; s4, taking potassium feldspar, calcite, calcined talcum, boric sludge, zinc oxide, zirconium silicate and water according to parts by weight, mixing and ball milling to obtain environment-friendly glaze slurry, and applying the environment-friendly glaze slurry on the surface of a ceramic green body in a glaze spraying or glaze dipping mode; s5, sending the glazed green body into a kiln, sintering, and naturally cooling to room temperature along with the kiln after sintering is finished to obtain the high-strength household environment-friendly ceramic.
  2. 2. The preparation method according to claim 1, wherein in the step S1, the mass concentration of the aqueous solution of phytic acid is 1-2%, the mass ratio of the red mud to the aqueous solution of phytic acid is 1:8-10, the power of the ultrasonic wave is 200-300W, the temperature of the stirring reaction is 40-50 ℃ and the time is 2-3h.
  3. 3. The preparation method according to claim 1, wherein in the step S2, the mass ratio of the coal gangue to the rice hull ash is 7-7.5:2.5-3, the mass concentration of the sodium hydroxide solution is 2-3%, the mass ratio of the mixed powder to the sodium hydroxide solution is 100:15-20, the rotational speed of the ball milling is 300-400r/min, and the time is 2-3h.
  4. 4. The preparation method according to claim 1, wherein in the step S2, the mass ratio of the pretreatment powder, water and papermaking black liquor is 100:500-700:1.5-2, the temperature of the heating reaction is 50-60 ℃ and the time is 1-2h.
  5. 5. The preparation method of the composite material of the ceramic green brick powder is characterized in that in the step S3, the raw materials comprise, by weight, 25-30 parts of albite, 10-15 parts of waste glass powder, 10-15 parts of wollastonite, 30-35 parts of modified coal gangue and 15-20 parts of modified red mud, the addition amount of the bio-based grinding aid is 0.5-0.8% of the mass of the green brick powder, and the addition amount of the water is 0.8-1.2 times of the mass of the green brick powder.
  6. 6. The preparation method of the bio-based grinding aid according to claim 1, wherein in the step S3, the bio-based grinding aid is prepared by uniformly mixing, by weight, 55-65 parts of waste molasses, 25-35 parts of sodium silicate and 5-15 parts of sodium oleate.
  7. 7. The method according to claim 1, wherein in step S3, the wet ball milling is performed for 5-7 hours, the press forming pressure is 15-25MPa, the drying temperature is 100-120 ℃, and the drying is performed until the water content of the green body is less than 1%.
  8. 8. The preparation method of the ball mill according to claim 1, wherein in the step S4, the raw materials are 30-35 parts by weight of potassium feldspar, 15-20 parts by weight of calcite, 10-15 parts by weight of calcined talcum, 8-12 parts by weight of boric sludge, 5-8 parts by weight of zinc oxide, 3-5 parts by weight of zirconium silicate and 40-50 parts by weight of water, and the ball milling time is 6-8 hours.
  9. 9. The method according to claim 1, wherein in step S5, the sintering process is performed by heating to 400-600 ℃ at 3-5 ℃ per min, maintaining for 1-2 hours, and then heating to 1150-1200 ℃ at 8-10 ℃ per min, and maintaining for 2-3 hours.
  10. 10. A high strength household environmental ceramic prepared by the method of any one of claims 1-9.

Description

High-strength household environment-friendly ceramic and preparation method thereof Technical Field The invention belongs to the technical field of ceramic preparation, and particularly relates to high-strength household environment-friendly ceramic and a preparation method thereof. Background Daily ceramic is an indispensable part of people's daily life, and its market demand continues to increase. The traditional daily ceramic production mainly depends on natural mineral resources such as high-grade clay, feldspar, quartz and the like. However, with the increasing exhaustion of high quality mineral resources and the rising exploitation costs, the ceramic industry is faced with a severe raw material crisis. Meanwhile, along with the enhancement of social environmental awareness, how to reduce production energy consumption and improve the added value of products becomes an important direction of industry technology upgrading. Therefore, the preparation of ceramics by utilizing industrial solid wastes to replace partial natural raw materials has become a research hotspot in the fields of material science and environmental engineering. Among the industrial solid wastes, red mud and coal gangue are attracting attention because of their large yield, storage occupation and easy environmental pollution. The two kinds of solid wastes are applied to ceramic preparation, and theoretically, the method has remarkable economic and environmental benefits. However, in practical application, the prior art still faces the technical bottlenecks that (1) the red mud has high alkalinity and high iron content, and the red mud contains a large amount of free alkali (such as Na 2O、K2 O), so that when the red mud is introduced into a ceramic blank body by adopting a traditional method, the frosting phenomenon is very easy to occur in the firing and using processes even through simple water washing, and the attractive appearance and durability of the product are seriously affected. In addition, the high content of ferric oxide (Fe 2O3) in red mud can make ceramics dark red or brown, limit the application of the red mud in white or light-colored household ceramics, and are generally considered as harmful impurities affecting the high-temperature performance of the ceramics. (2) The coal gangue has a certain chemical activity after calcination, which is a difficult technological problem caused by the poor inertia and plasticity of the coal gangue, but it is still essentially an inert, non-plastic aggregate. After a lot of clay is replaced in the ceramic formula, the plasticity of the blank is greatly reduced, the blank is difficult to form, the green strength is low, and the blank is extremely easy to crack in the drying and firing processes, so that the effective blending amount of the blank in the formula is limited. (3) The research on the composite utilization of various solid wastes is mostly carried out on a simple physical mixing layer, namely the technology is piled up. The various solid waste components only play roles as cheap fillers, and do not form effective chemical synergistic effect, so that the final product has mediocre performance and can be only used for preparing low-added-value building ceramsite, water permeable bricks and the like. Therefore, the high-strength household environment-friendly ceramic and the preparation method thereof are developed in the field to realize the high-valued and functional utilization of industrial solid wastes in the field of environment-friendly household ceramic, and have great significance. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide high-strength household environment-friendly ceramic and a preparation method thereof. In order to achieve the above purpose, the present invention provides the following technical solutions: A preparation method of high-strength household environment-friendly ceramic comprises the following steps: S1, preparing modified red mud, namely washing the red mud to remove impurities, adding the red mud into a phytic acid aqueous solution, stirring the red mud under an ultrasonic condition for reaction, and filtering and drying the red mud after the reaction is finished to obtain the modified red mud; S2, preparing modified gangue powder, namely uniformly mixing the gangue with rice hull ash to obtain mixed powder, then adding sodium hydroxide solution into the mixed powder, and performing ball milling to obtain pretreated powder; S3, preparing a ceramic blank, namely uniformly mixing albite, waste glass powder, wollastonite, modified coal gangue and modified red mud to obtain green body powder, then adding a bio-based grinding aid and water, performing wet ball milling, sieving to remove iron to obtain slurry, performing grouting or press molding, and drying to obtain a ceramic green body; s4, preparing environment-friendly glaze slurry, namely taking potassium feldspar, calcite, calcined talcum, boric sl