A kind of preparation method of the ceramic cooking with high-heat resistance shock resistant

Technical field

The present invention relates to ceramic field, specifically a kind of ceramic cooking with high-heat resistance shock resistant and preparation method thereof.

Background technology

Ceramic cooking（Such as slaughterhouse, frying pan）With health, practical, it is readily cleaned, the features such as thermal storage performance is good.But In the presence of some shortcomings, such as：The thermal shock resistance test result of in general ceramic cooking is all ” one in 450 DEG C of inputs, 20 DEG C of water It is secondary not split ” below, the larger rapid heat cycle of the temperature difference in use, it may result in cooking device cracking；Some porcelain degree are poor Cooking device, its water absorption rate is higher, is easy to adsorb peculiar smell, and its intensity is poor, is easy to touch in use scarce.By technological innovation, from Seek technological break-through in terms of composition of raw materials, production technology, improve the thermal shock resistance of ceramic heat resistant cooking device, intensity and porcelain journey Degree improves, and promotes the General Promotion of quality of item, is always domestic ceramics industry and heat-resisting ceramic cooking device manufacturing enterprise technology Research and the content of technology public relations.

The content of the invention

To solve the above problems, the invention provides a kind of preparation method of the ceramic cooking with high-heat resistance shock resistant, Manufactured ceramic cooking has higher thermal shock resistance（Product does not split once from 600 DEG C to 20 DEG C heat exchanges）, and product Porcelain degree and intensity are higher.

The preparation method of the ceramic cooking of the high-heat resistance shock resistant of the present invention, it is characterised in that including following production stage：

（1）It is prepared by blank

Take the parts by weight of spodumene 44-48, the parts by weight of kaolin 36-40, the parts by weight of petalite 6-10, useless porcelain 5-7 The raw material of parts by weight, the parts by weight of bentonite 1-3 as blank；

— it through excess temperature is 1200-1250 DEG C that above-mentioned spodumene, which is, and the time is 14-18 hours calcination processings；On State kaolin and respectively account for kaolinite from Fujian Longyan and two, Guizhou different sources, wherein Fujian Longyan kaolin and Guizhou kaolin The 50% of native dosage；Above-mentioned useless porcelain refers to the porcelain scrapped after burning till, and is fragmentated with hammering；

After above-mentioned raw materials are mixed plus clear water carries out wet ball grinding, and 200 mesh are crossed after ball milling raw material is by magnetic separator de-ironing iron removaling Clod, into clod, is carried out pugging by pug mill, prepares mass by sieve, the raw material after iron removaling is sieved by filter press press filtration The blank that moisture content is 21-23% is standby；

（The special role of materials application in above-mentioned blank formulation：

Contain a certain amount of lithia in spodumene, the thermal shock resistance of cooking device product can be improved, it may have mineralizer is made With can reduce sintering temperature, improve the density and intensity of product.Spodumene makes the part in spodumene miscellaneous after calcining Matter decomposes volatilization, improves the purity of spodumene, is advantageous to the raising of quality of item.

Kaolin is the primary raw material of household porcelain production, and the kaolin in the Fujian Longyan place of production therein burns till rear whiteness Height, be advantageous to the raising of product whiteness；Guizhou kaoline viscosity therein is high, is advantageous to improve the plasticity of blank, can improve system The qualification rate of product shaping.

Lithia and alumina ratio in petalite are higher than other lithium ores, can form model in wider blank The relatively low base substrate of the coefficient of expansion is made in enclosing, firing temperature can be reduced but firing range will not be reduced, production can be improved Product thermal shock resistance.

Useless porcelain is the material by burning till, and can suitably reduce firing temperature, shortens firing time, saves material cost, is A kind of twice laid.

Bentonite is the plasticizer of ceramic batch.The plasticity and caking property of blank can be improved, improves the drying of ceramic blank Intensity and burn till intensity.）

（2）It is prepared by glaze

Take the parts by weight of spodumene 76-79, the parts by weight of calcium oxide 4-6, the parts by weight of magnesia 9-11, the weight of kaolin 7-8 Measure raw material of the part as glaze；

— it through excess temperature is 1200 DEG C-1250 DEG C that above-mentioned spodumene, which is, and the time is 14-18 hours calcination processings；

After above-mentioned raw materials are mixed plus clear water carries out wet ball grinding, through ball milling raw material by magnetic separator de-ironing iron removaling, after iron removaling Raw material crosses 320 mesh sieves, through sieve raw material with clear water be deployed into concentration be 52 Baume degrees glaze it is standby；

（The characteristics of glaze is made with above-mentioned raw materials：

The expansion coefficient similar of the glaze made of above-mentioned raw materials, its coefficient of expansion and blank, and cause product glaze layer Density improves, and can improve the thermal shock resistance of product, the porcelain degree and intensity of product accordingly improve.）

（3）It is molded repaired biscuit

Above-mentioned standby blank is taken, roll forming is carried out using roller head machine；Roll-forming process is rolled using delay Method, the delay rolling is by the rolling time of original single product（Conventional is 15-16 seconds）30-32 seconds are extended to, is made The density and intensity of base substrate improve；

Using the conventional repaired biscuit technique of household porcelain production, molding blank surface is repaired；

（4）Biscuiting

Using routine ceramic kiln to through be molded repaired biscuit base substrate carry out biscuiting, 800-850 DEG C of biscuiting temperature, 5-6 hours biscuiting time；

（5）Glazing

Glazing is carried out to the base substrate through biscuiting, using leaching glaze method, base substrate immerses the glaze that concentration is 52 ± 2 Baume degrees for glazing Soaked 4-5 seconds in liquid, product surface is adsorbed glaze liquid, form the glaze layer that thickness is 0.4-0.5mm；

（6）Burn till

It is to be burnt till using conventional ceramic kiln to being burnt till through glazing base substrate, firing temperature highest Reach 1270-1280 DEG C, firing time is 16-18 hours；In sintering process, it should be kept 1240-1260 DEG C of stages 1-1.5 hours, make glaze layer closely knit；I.e. finished product after base substrate is burnt till.

High-heat resistance shock resistant ceramic cooking product qualification rate produced by the present invention is high, and product appearance is regular, and glaze layer is closely knit, production Product intensity is high, and the thermal shock resistance of product reaches heat exchange in 600 DEG C of inputs, 20 DEG C of water and do not split once.

Embodiment

Embodiment：

（1）It is prepared by blank

Take the parts by weight of spodumene 45, the parts by weight of kaolin 38, the parts by weight of petalite 8, the useless parts by weight of porcelain 6, the weight of bentonite 2 Measure raw material of the part as blank；

— it through excess temperature is 1240 DEG C that above-mentioned spodumene, which is, and the time is 15 hours calcination processings；Above-mentioned kaolin comes From Fujian Longyan and two, Guizhou different sources, wherein Fujian Longyan kaolin and Guizhou kaolin respectively accounts for kaolin dosage 50%；Above-mentioned useless porcelain refers to the porcelain scrapped after burning till, and is fragmentated with hammering；

After above-mentioned raw materials are mixed plus clear water carries out wet ball grinding, and 200 mesh are crossed after ball milling raw material is by magnetic separator de-ironing iron removaling Clod, into clod, is carried out pugging by pug mill, prepares mass by sieve, the raw material after iron removaling is sieved by filter press press filtration The blank that moisture content is 22% is standby；

（2）It is prepared by glaze

The parts by weight of spodumene 78, the parts by weight of calcium oxide 5, the parts by weight of magnesia 10, the parts by weight of kaolin 7 are taken as glaze Raw material；

— it through excess temperature is 1240 DEG C that above-mentioned spodumene, which is, and the time is 15 hours calcination processings；

After above-mentioned raw materials are mixed plus clear water carries out wet ball grinding, through ball milling raw material by magnetic separator de-ironing iron removaling, after iron removaling Raw material crosses 320 mesh sieves, through sieve raw material with clear water be deployed into concentration be 52 Baume degrees glaze it is standby；

（3）It is molded repaired biscuit

Above-mentioned standby blank is taken, the roll forming of pot shape base substrate is carried out using roller head machine；Roll-forming process is adopted With delay rolling depression method, by the rolling time lengthening of original single product to 31 seconds；

Using the conventional repaired biscuit technique of household porcelain production, molding blank surface is repaired；

（4）Biscuiting

Using the ceramic kiln of routine to carrying out biscuiting, 820 DEG C of biscuiting temperature, during biscuiting through being molded the base substrate of repaired biscuit Between 5 hours；

（5）Glazing

Glazing is carried out to the base substrate through biscuiting, using leaching glaze method, base substrate immerses the glaze liquid that concentration is 52 Baume degrees for glazing Middle immersion 4 seconds, makes product surface adsorb glaze liquid, forms the glaze layer that thickness is 0.4mm；

（6）Burn till

It is to be burnt till using conventional ceramic kiln to being burnt till through glazing base substrate, firing temperature highest Reach 1270 DEG C, firing time is 17 hours；In sintering process, kept for 1 hour 1240-1260 DEG C of stages；Base substrate is burnt till It is finished product ceramic pan afterwards.

The qualification rate of high-heat resistance shock resistant ceramic pan is up to 99% made from embodiment, and product appearance is regular, and glaze layer is closely knit, production Product intensity is high, and the thermal shock resistance of product reaches heat exchange in 600 DEG C of inputs, 20 DEG C of water and do not split once（By having qualification mechanism by QB/ T2580《Fine ceramics cooking device》Standard gauge location survey tries）.

Comparative example 1：Unlike embodiment, the addition of petalite is kept to 3 parts by weight in blank.Manufactured product Thermal shock resistance decline, product sintering qualified rate significantly declines, only 90%.

Comparative example 2：Unlike embodiment, the kaolin in blank is all using Fujian Longyan kaolin.Cause base Expect that plasticity declines, product ftractures being delayed in roll-forming process.

Comparative example 3：Unlike embodiment, product does not use delay rolling depression method, using the roll forming side of routine Method.Manufactured product is because blank density is poor, insufficient strength, is easy to damaged.

Comparative example 4：Unlike embodiment, product soak time in glaze liquid is 2 seconds, glazed thickness 0.2mm.It is made Product glaze layer it is not closely knit enough, poor flatness.

Comparative example 5：Unlike embodiment, during product is burnt till, only kept 1240-1260 DEG C of stages 0.5 hour. Manufactured product glaze layer is not closely knit enough, the increase of glaze layer defects.