CN101717191A - Opal glass suitable for full electrofusion forming and preparation process thereof - Google Patents

Abstract

The invention discloses an opal glass suitable for full electrofusion forming and a preparation process thereof. The opal glass is prepared by composing a batch mixture by mixing a base material, an auxiliary material and an additive and adopting a full electrofusion method at the temperature of 1480-1520 DEG C; and the components of the batch mixture comprise the following components expressed as oxides in percentage by weight: 68.0-71.0% of SiO2, 6.0-7.5% of Al2O3, 1.0-1.5% of CaO, 9.0-10.5% of Na2O, 3.0-4.0% of F-, 1.5-2.5% of ZnO, 3.5-5.0% of B2O3, 1.0-2.0% of BaO and 1.0-2.0% of K2O. The opal glass prepared by the process has thermal expansion coefficient alpha less than or equal to 7.8*10-6/DEG C, saves the energy by 50 percent as compared with the transitional method, achieves the mohs hardness of 6.8, the thermal shock resistance more than 125 DEG C and the water resistance of a primary standard, has main performance indexes all achieving or exceeding the level of similar imported products, meets the requirements for environmental protection and health and is an ideal substitute of the transitional porcelain product.

Description

A kind of opal glass of suitable full electrofusion forming and preparation technology thereof

Technical field

The present invention relates to opaque glass and preparation technology, be specifically related to a kind of milky white brilliant porcelain glass formula and preparation technology thereof of suitable full electrofusion forming.

Background technology

The production technique of domestic traditional opaque glass tableware mainly is a flame fusing kiln.Its prescription is through groping of last decade, comparative maturity.But use the full electrofusion kiln to produce the opaque glass tableware, at home, or the thing of nearest one or two years.Indiscriminately imitate the Recipe of flame fusing kiln, in actual production, run into a no small difficult problem.Mainly show as, the corrodibility of glass is strong, and product defects is many.Especially be commonly called as the defective of " hickie ", much more serious than flame fusing kiln.

Summary of the invention

The objective of the invention is to: opal glass and preparation technology thereof that a kind of suitable full electrofusion forming is provided, production has the cheap and good-quality environment-friendly type opaque glass tableware of jade texture, to substitute traditional lacquer tableware, save energy, reduce cost, improve 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 quartz sand, Feldspar Powder, aluminum oxide powder, BORAX PENTAHYDRATE-99.9 MIN, soda ash, auxiliary material is fluorite powder, barium carbonate, rhombspar, oxide powder and zinc and Sodium Silicofluoride, additive is a compound clarifier, be specially saltpetre and SODIUMNITRATE, the each component weight percentage is in the admixtion:

SiO ₂ 68.0～71.0 Na ₂O 9.0～10.5 B ₂O ₃ 3.5～5.0

K ₂O 1.0～2.0 Al ₂O ₃ 6.0～7.5 F ^- 3.0～4.0

ZnO 1.5～2.5 CaO 1.0～1.5 BaO 1.0～2.0

The preparation technology of the opaque glass of described a kind of suitable full electrofusion is characterized in that: preparation technology comprises raw material pulverizing---mix---full electrofusion---moulding:

At first, raw material is after cleaning, with crusher in crushing to 60～100 orders; Then, the base-material that crushes, auxiliary material and additive be accurately weighing on request, mixes in mixer, and its uniformity coefficient (requirement by glass compound building material industry standard JC/T 648-1996 is measured) reaches more than 98%;

Secondly, adopt the all-electric melting method under 1480～1520 ℃ of conditions of temperature, to prepare opaque glass, the admixtion that mixes is layered on the metal level in the smelting furnace, so that admixtion fully melts, homogenizing and clarification;

At last, the opaque glass that fusing is good, from being positioned at the dog-hole at the bottom of the full electric furnace, through uptake, material road, flow into feed basin, adopt the compression moulding mode, cooperate mould to make the product of definite shape, after the flame surface finish, product is carried out anneal, the annealed time is more than 50 minutes, annealing temperature is eliminated the internal stress of product between 560～630 ℃.

By adjusting the consumption of fluorite, Sodium Silicofluoride, control the jade texture degree of opaque glass.

By adjusting the consumption of additive, improve the corrodibility of glass.Satisfy the needs of variant production melt-forming.

But additive amount is excessive, and the glass melting quality can be under some influence.

The present invention is used in the full electrofusion forming production technique, and it meets the 3R principle of cleaner production fully: i.e. minimizing principle (Reduce), re-use principle (Reuse) and recirculation principle (Recycle).The 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 opaque glass is to the common porcelain product of the amount ratio of traditional raw material much less; The two the first, 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 three the second, material property is better than common porcelain vessel, near the high-boron-silicon glass goods, its Mohs' hardness can reach more than 6.8, 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 four or three, itself also can reclaim recycling waste and old opaque glass, and other material such as porcelain does not then have this returnability; The five or four, 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; The 5th, also can use in the production and reclaim the resource that glass has substituted continuous exhaustion on a large amount of earth such as quartz sand, opaque glass is to the common porcelain product of the amount ratio of traditional raw material much less.

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.

Preparation technology of the present invention is: raw material pulverizing---mixes---full electrofusion---moulding.At first, raw material after choosing is washed, 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 60～100 order scopes; Then, crush base-material, auxiliary material and additive on request accurately after the weighing, mix in mixer, its uniformity coefficient should reach more than 98%;

Secondly, adopt full electrofusion under 1480～1520 ℃ of conditions of temperature, to prepare opaque glass, the admixtion that mixes of thin layer evenly is layered on the metal level in 10 square metres the all-electric melting furnace, so that whole admixtion fully melts, homogenizing and clarification, there is not bubble to guarantee the glass melting uniformity.Adjust its thickness according to the situation of cold burden layer, with the technology of controlling its fusing and the volatile quantity that reduces volatile components; At last, the opaque glass that fusing is good is from being positioned at the dog-hole at the bottom of the full electric furnace, through uptake, material road, inflow feed basin, adopt the compression moulding mode, cooperate special mould to make the product of definite shape, after the flame surface finish, product is annealed, eliminate the internal stress of product.

Like this, product just can normally use.In particular surroundings, use if desired, as microwave oven and baking box etc.Only needing that product is carried out simple tempering gets final product.

This all-electric melting furnace adopts symmetrical round design, can produce the uniform bed of material, so that an as far as possible evenly situation of fusing is arranged on the whole all-electric melting furnace 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.

Example 1 makes 1 test of materials side, and each composition is as follows: SiO ₂71.0%, Al ₂O ₃6.0%, B ₂O ₃5%, CaO 1.0%, Na ₂O 10.5%, K ₂O 1.0%, and ZnO 1.5%, and F-3.0%, and BaO 1.0%, and each composition is crushed to 60 orders to be mixed, and with this admixtion uniform mixing, drops into the electric furnace heat fused then, and the smelting furnace top temperature is 1480 ℃, fully fusing of each component, homogenizing and clarification in the admixtion.Take out blow molding immediately, its outward appearance and physicochemical property are assessed.

Example 2 makes 2 tests of materials side, and each composition is as follows: SiO ₂69.5%, Al ₂O ₃6.75%, B ₂O ₃4.25%, CaO 1.25%, Na ₂O 9.75%, K ₂O 1.5%, and ZnO 2.0%, F ^-3.5%, BaO 1.5%, each composition is crushed to 80 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.

Example 3 makes 3 tests of materials side, and each composition is as follows: SiO ₂68.0%, Al ₂O ₃7.5%, B ₂O ₃3.5%, CaO 1.5%, Na ₂O 9.0%, K ₂O 2.0%, and ZnO 2.5%, F ^-4.0%, BaO 2.0%, and each composition is crushed to 100 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 (2)

1. the opaque glass of a suitable full electrofusion, it is characterized in that: this opaque glass mixes with base-material, auxiliary material and additive and forms admixtion, base-material is quartz sand, Feldspar Powder, aluminum oxide powder, BORAX PENTAHYDRATE-99.9 MIN, soda ash etc., auxiliary material is fluorite powder, barium carbonate, rhombspar, oxide powder and zinc and Sodium Silicofluoride, additive is saltpetre and SODIUMNITRATE, and the each component weight percentage is in the admixtion:

SiO ₂ 68.0～71.0 Na ₂O 9.0～10.5 B ₂O ₃ 3.5～5.0

K ₂O 1.0～2.0 Al ₂O ₃ 6.0～7.5 F ^- 3.0～4.0

ZnO 1.5～2.5 CaO 1.0～1.5 BaO 1.0～2.0

2. the preparation technology of the opaque glass of a kind of suitable full electrofusion according to claim 1, it is characterized in that: preparation technology comprises raw material pulverizing---mix---full electrofusion---moulding:

At first, raw material is after cleaning, with crusher in crushing to 60～100 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 opaque glass, the admixtion that mixes is layered on the metal level in the smelting furnace, so that admixtion fully melts, homogenizing and clarification;

At last, the opaque glass that fusing is good, from being positioned at the dog-hole at the bottom of the full electric furnace, through uptake, material road, flow into feed basin, adopt the compression moulding mode, cooperate mould to make the product of definite shape, after the flame surface finish, product is carried out anneal, the annealed time is more than 50 minutes, annealing temperature is eliminated the internal stress of product between 560～630 ℃.