Manufacturing method of foamed ceramic plate

Abstract

The invention discloses a manufacturing method of a foamed ceramic plate, which comprises the following steps: (1) selecting a foamed ceramic raw material, and proportioning according to a formula; (2) carrying out ball milling treatment on the foamed ceramic raw material; (3) carrying out mud squeezing treatment on the foamed ceramic raw material to obtain a mud cake, and pugging the mud cake to obtain a mud strip; (4) performing vacuum extrusion molding on the mud strip to obtain a green body; and (5) directly sintering the green body in a sintering kiln, wherein the compressive strength of the sintered foamed ceramic is greater than or equal to 3.5 MPa, and the volume density is 380-500kg / m < 3 >. The invention can realize wet sintering, is environment-friendly and energy-saving, can be suitable for various raw material formula systems, and can also be suitable for various sintering kilns. By adopting the method, the firing period can be shortened by 20-30%, the single-line productivity is improved by more than 20%, and the energy consumption of a unit product is reduced by more than 30%.

Description

technical field [0001] The invention relates to the technical field of ceramic plates, in particular to a manufacturing method of a foamed ceramic plate. Background technique [0002] Foamed ceramics is a kind of thermal insulation material that uses ordinary ceramic raw materials or mine tailings plus high-temperature foaming agent, and is fired at around 1160 °C. Green environmental protection products. [0003] The process route of the existing foamed ceramics is as follows: raw material - ingredient ball milling - slurry stale - spray drying - powder stale - kiln car stacking powder - firing - front grinding - reverse grinding - edging - grading and packaging - warehousing . [0004] The manufacturing method of existing foamed ceramics has the following shortcomings: [0005] 1. The existing foamed ceramics are fired by dry powder. There is a large amount of dust in the production process, which is difficult to control for environmental sanitation. Moreover, dust remo...

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Problems solved by technology

[0005] 1. Existing foamed ceramics are fired with dry powder, and there is a lot of dust in the production process, which is difficult to control the environmental sanitation. In addition, dust removal devices need to be added in many links such as spraying, silo, transportation, and powder stacking.

[0006] 2. The above method requires spray powder making, which brings high energy consumption, and because of high temperature heating and evaporation of water, it also brings flue gas treatment costs and environmental pollution

[0007] 3. Since the above method uses "feeder car cloth powder", that is, the material car cloth powder is put into the kiln car, so the kiln car must be used. To use the kiln car, it is necessary to lay the bottom plate - lay the bottom paper - the upper edge - pave the wall Mold auxiliary processes such as paper-bottom panel-mold conveying roller table (or AGV trolley), the process is relatively complicated

[0008] 4. The above-mentioned processes such as spray powder making, stale powder, and kiln car powder stacking require a lot of equipment investment and occupy a large area of ​​land, which is not conducive to controlling production costs

[0010] However, D1 produces only building insulation boards with a strength of only 0.55-1.0 MPa, and cannot produce wall base materials, which cannot meet the requirements of the national standard GB / T 23451-2009 "Lightweight Partition Wall Slats for Buildings" on compression resistance Requirements for strength (strength ≥ 3.5MPa)

At the same time, polyphenylene particles need to be added in the D1 process. Polyphenylene particles will release toxic gases during the firing process in the kiln, causing serious pollution.

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