CN101066837B

CN101066837B - Environment friendly heat resistant opal crystalline glass and its preparation process

Info

Publication number: CN101066837B
Application number: CN2007100227053A
Authority: CN
Inventors: 邴旭卫; 李伟
Original assignee: JIANGSU AOBO CRYSTALLINE GLASS SOI-TECH Co Ltd
Current assignee: JIANGSU AOBO CRYSTALLINE GLASS SOI-TECH Co Ltd
Priority date: 2007-05-24
Filing date: 2007-05-24
Publication date: 2010-08-04
Anticipated expiration: 2027-05-24
Also published as: CN101066837A

Abstract

The present invention discloses one kind of environment friendly heat resistant opal crystalline ceramic glass and its preparation process. The opal crystalline ceramic glass is prepared with base material, supplementary material and additive and through one electric smelting process at 1480-1520 deg.c. It consists of SiO2 67.0-78.0 wt%, Al2O3 5.0-7.5 wt%, CaO 1.0-1.5 wt%, MgO 1.5-2.0 wt%, Na2O 4.0-6.0 wt%, F- 3.0-5.0 wt%, ZnO 1.3-1.5 wt%, B2O3 2.2-4.0 wt%, BaO 1.0-1.5 wt%, and K2O 3.0-4.0 wt%. It has thermal expansion coefficient not higher than 7.0x10<-6>/ deg.c, Mohs hardness up to 6.5, thermal shock resisting temperature higher than 150 deg.c and high water resistance, and is ideal substitute for traditional porcelain.

Description

A kind of environment friendly heat resistant opal crystalline glass and preparation technology thereof

Technical field

The present invention relates to milky white brilliant porcelain glass and reach preparation technology, be specifically related to a kind of environment friendly heat resistant opal crystalline glass and preparation technology thereof.

Background technology

It is reported for environmental protection requirement the porcelain product that European Union in 2007 will progressively forbid producing, import contains heavy metal.Utilize opaque glass to produce glassware various reports were arranged abroad.At present relatively success is the healthy and free from worry and French bow and arrow of the U.S., and the opaque glass vessel that they develop can substitute traditional lacquer, but the while also has several big inferior positions such as high investment, expensive, high price.

Summary of the invention

The objective of the invention is to: a kind of environment friendly heat resistant opal crystalline glass and preparation technology thereof are provided, produce the cheap and good-quality environment-friendly type glassware of imitative porcelain or imitative beautiful two kinds of texture, to substitute the traditional lacquer vessel, save energy reduces cost, and improves quality.

Technical solution of the present invention is: the brilliant porcelain glass of this milky white mixes with base-material, auxiliary material and additive and forms admixtion, base-material is glass or quartz sand, auxiliary material is potassium felspar sand, fluorite, aluminum oxide powder, borax, soda ash, barium carbonate, lime carbonate, zinc powder, additive is a Sodium Silicofluoride, and each component represents that with oxide compound weight percentage is in the admixtion:

SiO ₂ 67.0～78.0 A1 ₂O ₃ 5.0～7.5 CaO 1.0～1.5

MgO 1.5～2.0 Na ₂O 4.0～6.0 F ^- 3.0～5.0

ZnO 1.3～1.5 B ₂O ₃ 2.2～4.0 BaO 1.0～1.5

K ₂O 3.0～4.0

Preparation technology of the present invention is: raw material pulverizing---mixes---fusing---moulding---check---packing, at first, raw material is after cleaning, with jaw crusher, hammer mill or impact breaker carry out coarse crushing and in broken, ball mill carries out in small, broken bits, according to the kind needs of product, to granularity require different, generally in 60～120 order scopes; Then, pulverized base-material, auxiliary material and additive be accurately weighing on request, mixes in mixer, and its uniformity coefficient reaches more than 98%; Secondly, adopt the all-electric melting method under 1480～1520 ℃ of conditions of temperature, to prepare milky white brilliant porcelain, the admixtion that mixes of thin layer is layered on the metal level in the smelting furnace, so that whole admixtion fully melts, homogenizing and clarification, to guarantee that the glass melting uniformity does not have bubble, adjust its thickness according to the situation of cold burden layer, with the speed of controlling its fusing and the volatile quantity that reduces volatile components; At last, after fusing is good, utilize the mode of blow molding, cooperate special mould to make the product of definite shape, can anneal to product in case of necessity, eliminate the internal stress of product, also can strengthen the mechanical mill polishing of mirror effect,, be sent to the warehouse and deposit through packing after the assay was approved.

This electrothermal oven adopts the symmetric form design, can produce the uniform bed of material, so that an as far as possible evenly situation of fusing is arranged on the whole melting pool metal level, admixtion is melted equably on whole melting pool surface to sink, admixtion is in corresponding local fusing, in the not occurred level displacement of the surface of melting pool, the fusing of admixtion is vertically carried out, the continuous constant of admixtion adds in the stove, one lamination one deck, the part that has melted below being substituted by initiate admixtion relies on this mode, and whole electric smelter finally reaches the ideal fusing equilibrium state of a uniformity.

By adjusting the consumption of additive, control the size and the quantity of microcrystallite, consumption is many more, and the crystallization phases proportion increases, and the glassy phase ratio reduces, and then presents the texture of stone material; On the contrary, if the glassy phase large percentage then presents the texture of jade.

The present invention is that a kind of glass cullet or quartz sand with recovery is the environment-friendly type glassware that base-material makes, be referred to as milky white brilliant porcelain glass, it meets the 3R principle of cleaner production fully: i.e. minimizing principle (Reduce), re-use principle (Reuse) and recirculation principle (Recycle), first, the recovery glass that uses in the production has substituted resource constantly exhausted on a large amount of earth such as quartz sand, and milky white brilliant porcelain glass is to the common porcelain product of the amount ratio of traditional raw material much less; The second, the all-electric melting method is with short production cycle, energy efficient greatly, and discharge amount of exhaust gas such as carbonic acid gas can reduce more than 70% in the production, and production cost is lower than other like product 50%; The 3rd, material property is better than common porcelain vessel, near the high-boron-silicon glass goods, its Mohs' hardness can reach more than 6.5, the heavy metal element amount of separating out is more much lower than traditional lacquer vessel, and clean environment firendly has solved a difficult problem that perplexs the common porcelain product heavy metal element high amount of separating out preferably; The 4th, waste and old milky white brilliant porcelain glass itself also can reclaim recycling, and other material such as porcelain does not then have this returnability; The 5th, the volatile quantity of comparable traditional combustion gas melting process such as the volatile quantity of volatile components such as fluorochemical is reduced to below 2% of novel process more than 40%, not only saved raw materials cost in a large number, and effectively reduced the discharging of pollutent, realized environmental protection production, simultaneously, because the reduction of volatilization loss, reduced the difference of skin glass deep layer glass below it on composition, the chemical ingredients of glass is more even, and performance is more stable.

Embodiment

In order to further specify content of the present invention, below provide example, but these examples are not construed as limiting to the scope of aforementioned body of the present invention.

It is base-material that example 1 adopts useless white glass bottle, and each component oxide content is as follows: SiO ₂67.0%, Al ₂O ₃7.5%, B ₂O ₃4.0%, CaO1.5%, MgO2.0%, Na ₂O6.0%, K ₂O4.0%, ZnO1.5%, F ^-5.0%, BaO1.5%, each composition are crushed to 60 orders to be mixed, with this admixtion uniform mixing, drop into the electric furnace heat fused then, the smelting furnace top temperature is 1480 ℃, blow molding is taken out in fully fusing of each component, homogenizing and clarification immediately in the admixtion, and its outward appearance and physicochemical property are assessed.

It is base-material that example 2 adopts useless white glass bottle, and each composition is as follows: SiO ₂72.5%, Al ₂O ₃6.25%, B ₂O ₃3.1%, CaO1.25%, MgO1.75%, Na ₂O5.0%, K ₂O3.5%, ZnO1.4%, F ^-4.0%, BaO1.25%, each composition is crushed to 90 orders to be mixed, with this admixtion uniform mixing, drop into the electric furnace heat fused then, the smelting furnace top temperature is 1500 ℃, fully fusing of each component, homogenizing and clarification in the admixtion, take out the sample blow molding immediately, its outward appearance and physicochemical property are assessed.

It is base-material that example 3 adopts useless white glass bottle, and each composition is as follows: SiO ₂78%, Al ₂O ₃5%, B ₂O ₃2.2%, CaO1.0%, MgO1.5%, Na ₂O4.0%, K ₂O3.0%, ZnO1.3%, F ^-3.0%, BaO1.0%, each composition are crushed to 120 orders to be mixed, and with this admixtion uniform mixing, drops into the electric furnace heat fused then; The smelting furnace top temperature is 1520 ℃, and the sample blow molding is taken out in fully fusing of each component, homogenizing and clarification immediately in the admixtion, and its outward appearance and physicochemical property are assessed.

The every index such as the following table of the milky white brilliant porcelain glass that above example 1,2,3 obtains:

By last table institute column data as seen, every index of each milky white brilliant porcelain glass specimen all is better than generally acknowledging in the market quality porcelain vessel preferably, and is suitable with the high ceramic whiteware glassware of the healthy and free from worry and bow and arrow production of costliness.

Claims

1. environment friendly heat resistant opal crystalline glass, it is characterized in that: the brilliant porcelain glass of this milky white mixes with base-material, auxiliary material and additive and forms admixtion, base-material is glass powder or quartz sand, auxiliary material is potassium felspar sand, fluorite, aluminum oxide powder, borax, soda ash, barium carbonate, lime carbonate, zinc powder, additive is a Sodium Silicofluoride, and each component represents that with oxide compound weight percentage is in the admixtion:

SiO ₂ 67.0～78.0 Al ₂O ₃ 5.0～7.5 CaO 1.0～1.5

MgO 1.5～2.0 Na ₂O 4.0～6.0 F ^- 3.0～5.0

ZnO 1.3～1.5 B ₂O ₃ 2.2～4.0 BaO 1.0～1.5

K ₂O 3.0～4.0; Wherein, preparation technology comprises raw material pulverizing---mix---fusing---moulding---check---packing, at first, raw material is after cleaning, with jaw crusher, hammer mill or impact breaker carry out coarse crushing and in broken, ball mill carries out in small, broken bits, at 60～120 orders; Then, the base-material that crushes, auxiliary material and additive be accurately weighing on request, mixes in mixer, and its uniformity coefficient reaches more than 98%; Secondly, adopt the all-electric melting method under 1480～1520 ℃ of conditions of temperature, to prepare milky white brilliant porcelain, the admixtion that mixes of thin layer is layered on the metal level in the smelting furnace, so that admixtion fully melts, homogenizing and clarification; At last, after fusing is good, utilize the mode of blow molding, cooperate mould to make the product of definite shape, pack, be sent to the warehouse and deposit through after the assay was approved.