CN1034568C - Process for producing large devitrified glass decorative board - Google Patents

Abstract

The present invention discloses a process for producing decorative boards made of microcrystalline glass with large specification, which is composed of the following steps of glass particle preparation, mould filling, vibration, pre-pressing moulding, sintering in a roller kiln, grinding and polishing. The boards can be compared with natural stone materials and have better appearance and rationalized performance. The boards are suitable for decorating outer wall surfaces, ground surfaces and inner wall surfaces of buildings.

Description

The production technique of large devitrified glass decorative board

The present invention relates to the production technique of large devitrified glass decorative board, more specifically to utilizing sintering process to make the production technique of large devitrified glass decorative board, this dalle can be used for skin, ground and inner wall decoration.

The decorative devitrified glass material is a kind of finishing material of novel high-grade, and it has can compare U.S. even better appearance luster with lithotome, and decorative pattern and physicochemical property can be used to substitute in a large number lithotome.At present, the production technique of microcrystalline glass decorative plate mainly contains two kinds: rolling process and sintering process, because rolling process complex manufacturing, the equipment requirements height, investment is big, though this method production output is big, but still do not form stable industrialized mass production at present both at home and abroad, the devitrified glass of especially big specification, although and sintering process output is lower, but because its technological process is disconnected, so its technology ratio is easier to control, the integrated requirement of equipment automatization is lower and scale of investment is less and become the method that present crystallizing glass sheet material manufacturing enterprise mainly adopts, for example the open CN1072398A of Chinese patent discloses the method for utilizing feldspar mine tailing sintering process to make the devitrified glass decoration materials, but existing sintering process prepares the production technique of devitrified glass decoration materials and all has a defective, the uneven whole degree of glass surface of promptly passing through after the sintering crystallization is higher, particularly when producing the product of big specification, because this defective makes devitrified glass need spend very long grinding, polishing time, its yield rate is lower, has increased production cost.

The object of the present invention is to provide a kind of production technique of utilizing sintering process to prepare large devitrified glass decorative board, this technology can be eliminated existing above-mentioned defective in the prior art, thereby produces the crystallizing glass sheet material of big specification.

Technology of the present invention is made up of the following step:

(1) glass particle preparation: prepare burden by following oxide compound compositing range (weight percent),

SiO ₂Al ₂O ₃CaO+MgO R ₂O ZnO BaO B ₂O ₃Sb ₂O ₃Tinting material

57-61 5-8 15-18 5-7 4-6 3-5 0.5-1.5 0.5-1＜5 are after fusing under the 1400-1500 ℃ of temperature of fusion is good, and the water granulation degree is the glass particle of 1-5mm;

(2) dress mould and vibrate pre-molding: the above-mentioned glass particle of packing in mould, vibration is 3-6 minute under the vibrational frequency of 60-120Hz, simultaneously at 2-3Kg/m ²Under the pressure pellet is pressed into arc;

(3) in roller kiln, carry out sintering: in roller kiln, carry out crystallization and handle, sinter into piece, adopt secondary crystallization to handle, be incubated 10-20 minute down and 40-70 minute at 900 ± 50 ℃ and 1100 ± 20 ℃ respectively;

(4) grind and polish: the crystallizing glass sheet material that sinters is ground, polishes.

Compared with prior art, technology of the present invention exists outstanding advantage and progressive aspect following:

1. the present invention adopts the vibration pre-molding behind glass particle dress mould, make loose glass particle be the hierarchal arrangement up and down of nature by grain graininess, make the pellet surface be certain arc simultaneously, thereby both guaranteed that the devitrified glass product surface had beautiful grivelle, pellet in the mould is shakeout in high-temperature sintering process automatically, glass board material surface finish behind the sintering is improved greatly, generally be no more than ± 0.5mm, king-sized stock board then is no more than ± 1mm, and yield rate improves a lot.

2. utilize roller kiln to carry out sintering, can realize the rapid crystallization sintering, Heating temperature is even, can control flexibly, can guarantee to have good planeness behind the crystallizing glass sheet material sintering, reduces the attrition process cost.Simultaneously, utilize roller kiln can realize weighing, charging, vibration, suppress, go into the streamlined operation of operations such as kiln, kiln discharge, the demoulding, be convenient to improve output, shorten the production cycle, realize automatization control.

3. adopt glass oxide compound of the present invention to form, be equipped with described subsequent technique, can separate out stratiform or sheet β-wollastonite, crystalline content is more than 85%, and the crystallizing glass sheet material hardness of this structure is moderate, is convenient to processing such as cutting, grinding and polishing, and glossiness is higher, and the plate face is soft.

Below in conjunction with embodiment technology of the present invention is described in more detail, these embodiment just are used for illustrating the present invention, rather than limit the invention.

The application's described " big specification " is meant the crystallizing glass sheet material of the above size of 400 * 400mm, 600 * 500mm for example, 600 * 600mm, the crystallizing glass sheet material of 600 * 900mm or other dimensions.

Example 1

20 parts of feldspars, 36 parts of quartz sands, 26.5 parts of coarse whitings, 2 parts of aluminum oxide powders, 1.2 parts of boric acid, 5 parts in zinc oxide, 4 parts of barium carbonates, 4.3 parts of soda ash, 0.8 part of SODIUMNITRATE, 0.2 part of weight of weisspiessglanz are mixed, in melting furnaces, admixtion is founded into glass at 1450 ℃, the shrend of melten glass liquid chilling is become the 1-4mm size particles, dry back weighing 20kg, packing into is of a size of in the mould that has releasing agent of 600 * 600 * 25mm, through 60Hz vibration 4 minutes, 2kg/m ²After the pressure compacting, enter in the roller kiln, insulation was incubated 55 minutes down for 20 minutes, 1100 ℃ under secondary crystallization was treated to 900 ℃, after being cooled to room temperature, obtain the hair plates of 620 * 620 * 18mm, obtain 600 * 600 * 18mm white sheet material through grinding, cut, polishing, the oxide compound of this product consists of (weight percent):

SiO ₂ Al ₂O ₃ CaO MgO K ₂O Na ₂O ZnO BaO Sb ₂O ₃?Fe ₂O ₃ B ₂O ₃

60.35 6.06 16.32?0.24 1.83 4.15 5.89 3.84 0.75 0.26 0.84

Example 2

White glass compound and 0.015 part of cobaltous oxide with the above-mentioned example 1 of 100 parts of weight, 1 part of ferric oxide mixes, under 1450 ℃, found into glass, shrend becomes the particle of 2-5mm, dry, weighing 15kg, pack in the mould of 640 * 550 * 25mm,, use 2.0kg/m through 90Hz vibration 3 minutes ²After the exert pressure, carry out secondary crystallization and handle in roller kiln, its parameter is 920 ℃ and is incubated 15 minutes down, 1100 ℃ are incubated 50 minutes down, after the cooling, obtain the hair plates of 620 * 520 * 20mm, obtain 600 * 500 * 20mm grey crystallizing glass sheet material through grinding, cut, polishing.

The oxide compound of this product consists of (weight percent):

SiO ₂ Al ₂O ₃?CaO MgO K ₂O Na ₂O ZnO BaO?Sb ₂O ₃?Fe ₂O ₃?CoO B ₂O ₃

59.54 5.08 16.9 0.23 1.81 4.0 5.83 3.8 0.74 1.24 0.01 0.82

Example 3

The white glass compound of the example 1 of 100 parts of weight is mixed with 5 parts of ferric oxide, found into glass under 1400 ℃, shrend becomes the 2-5mm particle, in the mould dry, that weighing 25kg packs 640 * 940 * 25mm into, through 120Hz vibration 3 minutes, and use 2.5kg/m ²The pressure compacting is carried out secondary crystallization and is handled in roller kiln, its parameter is 880 ℃ and is incubated 20 minutes down, 1100 ℃ are incubated 60 minutes down, after the cooling, obtain the hair plates of 620 * 920 * 20mm, obtain the dark brown crystallizing glass sheet material of 600 * 900 * 20mm through grinding, polish, cutting.The oxide compound of this product is formed (weight percent):

SiO ₂ Al ₂O ₃ CaO MgO K ₂O Na ₂O ZnO BaO Sb ₂O ₃ Fe ₂O ₃ B ₂O ₃

57.14 5.1 16.3 0.22 1.54 3.05 5.6 3.65 0.70 5 0.8

After testing, the machinery of this devitrified glass product, physicochemical property are as follows:

Shore hardness: 85-107

Ultimate compression strength: 248.7mPa

Folding strength: 47.5mPa

Proportion: 2.374g/cm ³

Glossiness: more than 90

Acidproof rate: more than 99%

Alkaline-resisting rate: more than 99%

Water-intake rate:＜0.01

In addition, in accompanying drawing 1, accompanying drawing a, b are respectively the crystalline structure figure when amplifying 18 times and 2500 times, the crystallizing glass sheet material that is made by the present invention as can be seen by this accompanying drawing contains stratiform or sheet β-wollastonite crystal, crystalline content is about 85%, and glassy phase is about 15%, and the microcrystal glass material cutting of this structure easily, hardness and physical strength are moderate, can be to its processing such as hole.

The devitrified glass product that is made by the present invention can present multiple color and pattern, adds the sheet material that different tinting materials can obtain other color on the basis of white micro-crystals glass, for example can add CdS, Se, CoO, FeO, K ₂Cr ₂O ₇, CuO, MnO ₂And the tinting material of combination, can obtain the microcrystal glass material of redness, grey, blue look, green, black, dark brown or the like color thus.

The microcrystalline glass decorative plate that is made by the present invention can be used for decorative constructure wall face, ground and interior metope.

Claims (2)

1. the production technique of large devitrified glass decorative board, form by the following step:

(1) glass particle preparation: prepare burden by following oxide compound compositing range (weight percent),

SiO ₂Al ₂O ₃CaO+MgO R ₂O ZnO BaO B ₂O ₃Sb ₂O ₃Tinting material

57-61 5-8 15-18 5-7 4-6 3-5 0.5-1.5 0.5-1＜5 are after fusing under the 1400-1500 ℃ of temperature of fusion is good, and the water granulation degree is the glass particle of 1-5mm;

(2) dress mould and vibrate pre-molding: the above-mentioned glass particle of packing in mould, vibration is 3-6 minute under the vibrational frequency of 60-120Hz, simultaneously at 2-3Kg/m ²Under the pressure pellet is pressed into arc;

(3) in roller kiln, carry out sintering: in roller kiln, carry out crystallization and handle, sinter into piece, adopt secondary crystallization to handle, be incubated 10-20 minute down and 40-70 minute at 900 ± 50 ℃ and 1100 ± 20 ℃ respectively;

(4) grind and polish: the crystallizing glass sheet material that sinters is ground, polishes.

2. the production technique of large devitrified glass decorative board according to claim 1, wherein this crystallizing glass sheet material is of a size of 600 * 500mm, 600 * 600mm, 600 * 900mm.

Images