CN1331813C - Production technology of non profiling kiln high temperature biscuit firing skeleton china and its formula - Google Patents

Abstract

The present invention relates to a production technology for skeleton porcelain through high temperature biscuit firing with non profiling kiln furniture, which is realized through the regulation of a skeleton porcelain prescription and the improvement of technology conditions. The technical processes comprise raw material processing, raw material preparation, grinding, iron removal through sieving, press filtration, pugging, molding, trimming, drying, high temperature biscuit firing, polishing inspection, glaze spraying, glaze firing, inspection and package inspection. The component range of the skeleton porcelain through high temperature biscuit firing with non profiling kiln furniture is disclosed in the specification. The present invention overcomes the technical constraint that the firing of skeleton porcelain needs a sagger, a protected sagger is not used, and skeleton porcelain which has the advantages of sufficient firing, fine porcelain texture and skeleton porcelain original style maintenance can be produced. The shrinkage of the skeleton porcelain reaches about 12% and is less than that of hard porcelain (about 13%) through multiple repeated tests, and the high temperature deformation amount of the skeleton porcelain is the same as that of hard porcelain. Thereby, the high temperature biscuit firing of skeleton porcelain without a sagger is realized.

Description

The non profiling kiln high temperature biscuit firing skeleton china production technique

Technical field

The present invention relates to the innovation and creation of sclerotin porcelain production technique, be specifically related to a kind of non profiling kiln high temperature biscuit firing skeleton china production technique and prescription thereof.

Background technology

The sclerotin porcelain is universally acknowledged high-grade porcelain, and 18th century were risen in Britain.Through 200 years of development, porcelain is pure white, the smooth characteristics soft, good transmittance of glaze become one of high-grade household china that is subjected to the countries in the world welcome deeply because of it has for the sclerotin porcelain.China's sixties trial production, the seventies trial production, the eighties begins to produce in batches, and output enlarges year by year, and quality level improves day by day.Since the nineties, domestic part colleges and universities and R﹠D institution form from sclerotin porcelain microstructure characteristics to sclerotin porcelain prescription and production technique has all been carried out big quantity research, the researchist mostly stresses to research and solve its processing performance, widen firing range, and biscuiting there is not the casket research work big progress and breakthrough do not arranged to sclerotin porcelain flat product.Over more than 200 year, the flat series products of high temperature biscuiting all be unable to do without imitative type saggar as high temperature biscuiting dish, bowl, dish etc. both at home and abroad.And there is following problems in the use of anti-type saggar: 1, the flat series products of different shapes, specification, must be equipped with special-purpose imitative type saggar, and certainly will increase the manufacturing cost of kiln furnitures like this; 2, reduce the utilization ratio of kiln, increase fuel cost, cause the waste of the energy; 3, increase labor intensity of operating personnel, labor productivity is reduced, work situation is poor simultaneously; 4, seriously restricted the exploitation timeliness of sclerotin porcelain kind.Owing to the technology prejudice that exists for a long time, all unresolved both at home and abroad the problems referred to above.

Summary of the invention

The problems referred to above at existing conventional bone porcelain has the casket firing process to exist the purpose of this invention is to provide a kind of production technique and sclerotin porcelain prescription thereof that does not have the flat series products of casket high temperature biscuiting sclerotin porcelain.

The object of the present invention is achieved like this: the non profiling kiln high temperature biscuit firing skeleton china production technique, it is characterized in that adopting following prescription and repeatedly pugging realization, and its technological process comprises:

The imitative type casket high temperature biscuiting of deironing → press filtration → pugging → moulding → repaired biscuit → drying → nothing → inspection throwing → glaze spraying → glaze firing → pick → inspection bag is handled → prepare burden → ground → sieve to raw material;

Sclerotin porcelain compositing formula is as follows:

$\left.\begin{array}{c}0.09~0.11K_{2}O\\ 0.03~0.04{\mathrm{Na}}_{2}O\\ 2.5~2.89\mathrm{CaO}\\ 0.06~0.07\mathrm{MgO}\end{array}\right\}\begin{array}{c}0.99{\mathrm{Al}}_2{O}_3\\ 0.01{\mathrm{Fe}}_2{O}_3\end{array}\left\{\begin{array}{c}4.22~4.38{\mathrm{SiO}}_2\\ 0.95~1.18P_2{O}_5\\ 0.01{\mathrm{TiO}}_2\end{array}\right.$

What especially note in its technology is to increase the pugging number of times in the pugging program, reaches and improves its homogeneity; In the shaping and drying supervisor, take simultaneously corresponding technology measure.

The present invention overcomes the technology constraint that existing sclerotin porcelain must have casket to fire, and by adjusting sclerotin porcelain prescription, suitably increases SiO in prescription ₂And Al ₂O ₃Content not only helps the effect of auxiliary skeleton, simultaneously, has increased liquid phase viscosity control high temperature deformation tendency.Do not use imitative type saggar, can produce equally and have that sintering is abundant, porcelain is fine and smooth, keep the sclerotin porcelain of original style of sclerotin porcelain.Reach through repetition test repeatedly and to be contracted in about 12%, less than hard-paste (about 13%); High temperature modification variable and hard-paste are suitable, thereby have realized no casket high temperature biscuiting sclerotin porcelain.

Compared to existing technology, the present invention has following remarkable advantage:

1, make sclerotin porcelain variety development not restricted by imitative type kiln furnitures, the exploitation timeliness is suitable with common household china;

2, can reduce the kiln furnitures cost greatly;

3, fuel consumption reduces greatly, and the casket porcelain is than reducing to 2: 1, kiln utilization ratio raising 30% by traditional 4: 1;

4, improve dress ON operation personnel's work situation, obviously reduced labour intensity, improved individual Lao Xiao.

Embodiment

Below in conjunction with embodiment the present invention is described in further detail.

The non profiling kiln high temperature biscuit firing skeleton china production technique, adopt following prescription and repeatedly pugging realization, its technological process comprises: the imitative type casket high temperature biscuiting of deironing → press filtration → pugging → moulding → repaired biscuit → drying → nothing → inspection throwing → glaze spraying → glaze firing → pick → inspection bag is handled → prepare burden → ground → sieve to raw material;

The prescription compositing range:

$\begin{array}{c}0.09~0.133K_{2}O\\ 0.03~0.05{\mathrm{Na}}_{2}O\\ 1.53~3.55\mathrm{CaO}\\ 0.05~0.07\mathrm{MgO}\end{array}\left\{\begin{array}{c}0.99{\mathrm{Al}}_2{O}_3\\ 0.01{\mathrm{Fe}}_2{O}_3\end{array}\left\{\begin{array}{c}2.60~4.49{\mathrm{SiO}}_2\\ 0.51~1.18P_2{O}_5\\ 0.01{\mathrm{TiO}}_2\end{array}\right.\right.$

The present invention compares with common high temperature biscuiting technology, and what especially note is to increase the pugging number of times in the pugging program, reaches and improves its homogeneity.

The present invention is around improving β-C in the sclerotin porcelain ₃P and CAS ₂Content, the skeleton of other porcelain kind is partly introduced in the sclerotin porcelain, play the effect of dual skeleton, increase the viscosity of glassy phase simultaneously, control high temperature deformation tendency.In order to guarantee the characteristics of sclerotin porcelain good transmittance, adopt silica powder, α-Al under 325 mesh sieves ₂O ₃Powder, Feldspar Powder and washed clay are to reduce quartz, feldspar, clay remains quantity and granularity in the sclerotin porcelain.

Prescription 1,

$\left.\begin{array}{c}0.11K_{2}O\\ 0.04{\mathrm{Na}}_{2}O\\ 2.89\mathrm{CaO}\\ 0.07\mathrm{MgO}\end{array}\right\}\begin{array}{c}0.99{\mathrm{Al}}_2{O}_3\\ 0.01{\mathrm{Fe}}_2{O}_3\end{array}\left\{\begin{array}{c}4.22{\mathrm{SiO}}_2\\ 1.18P_2{O}_5\\ 0.01{\mathrm{TiO}}_2\end{array}\right.$

Prescription 2,

$\left.\begin{array}{c}0.09K_{2}O\\ 0.03{\mathrm{Na}}_{2}O\\ 2.58\mathrm{CaO}\\ 0.06\mathrm{MgO}\end{array}\right\}\begin{array}{c}{0.99\mathrm{Al}}_2{O}_3\\ {0.01\mathrm{Fe}}_2{O}_2\end{array}\left\{\begin{array}{c}{4.30\mathrm{SiO}}_2\\ {0.95P}_2{O}_5\\ 0.01\mathrm{Ti}{O}_2\end{array}\right.$

Prescription 3,

$\left.\begin{array}{c}0.10K_{2}O\\ {0.03\mathrm{Na}}_{2}O\\ 2.73\mathrm{CaO}\\ 0.07\mathrm{MgO}\end{array}\right\}\begin{array}{c}0.99{\mathrm{Al}}_2{O}_3\\ 0.01{\mathrm{Fe}}_2{O}_3\end{array}\left\{\begin{array}{c}4.38{\mathrm{SiO}}_2\\ 1.10P_2{O}_5\\ 0.01{\mathrm{TiO}}_2\end{array}\right.$

Better through testing above-mentioned prescription processability, high-temperature liquid-phase viscosity is bigger, and the type variable is low, sintering temperature moderate (1240 ℃～1260 ℃), and transparence is better.Realized that under this formulation guide high temperature does not have casket biscuiting sclerotin porcelain.

The present invention just is being based on and is breaking through the technology that the conventional bone porcelain has casket to burn till, the achievement in research of carrying out.The thing phase composite of sclerotin porcelain is: tricalcium phosphate (β-C ₃P), lime feldspar (CAS ₂), glassy phase and pore and residual quartz etc.Wherein tricalcium phosphate and lime feldspar are that principal crystalline phase plays skeleton function in porcelain body, and in common household china SiO ₂And Al ₂O ₃The mullite that forms under high temperature action is the major portion of skeleton.

Claims (4)

1, non profiling kiln high temperature biscuit firing skeleton china production technique is characterized in that adopting following prescription and repeatedly pugging realization, and its technological process comprises:

The imitative type casket high temperature biscuiting of deironing → press filtration → pugging → moulding → repaired biscuit → drying → nothing → inspection throwing → glaze spraying → glaze firing → pick → inspection bag is handled → prepare burden → ground → sieve to raw material;

Sclerotin porcelain compositing formula is as follows:

2,, it is characterized in that sclerotin porcelain prescription is as follows according to the described non profiling kiln high temperature biscuit firing skeleton china production technique of claim 1:

3,, it is characterized in that sclerotin porcelain prescription is as follows according to the described non profiling kiln high temperature biscuit firing skeleton china production technique of claim 1:

4,, it is characterized in that sclerotin porcelain prescription is as follows according to the described non profiling kiln high temperature biscuit firing skeleton china production technique of claim 1: