SU1250550A1 - Method of grinding non-plastic components of ceramic slip - Google Patents

Description

one

The invention relates to the manufacture of ceramic products with a wet method of preparing raw materials and can be used, for example, in the preparation of facade tiles, floor tiles, sanitary construction products, etc.

The purpose of the invention is to accelerate the grinding of the aggravating components of the ceramic slip.

When grinding, emaciated components (fluxes), nepheline, nepheline-syenite, perlite, volcanic tuffs and glasses, metallurgical, fuel, cupola slags, waste of metallurgical processing at machine-building plants, etc. are used, quartz sand, ceramic clay products, broken glass, chalk and others; electrolytes: silicate block, liquid glass (36-45% sodium silicate solution of the formula Na On SiOj, where 6-3.4), sodium silicate, sodium hydroxide, sodium phosphate floor (pyrophosphate, tripoly f (1fc; d1, .

The essence of the invention is that not only clay, but also the components become eroded, being dispersed in water with the addition of electrolytes. In this case, the electrolyte presenting; one of the individual substances, silicate, sodium polyphosphate hydroxide or their mixture, is introduced as an inorganic dispersant and modifying additive at the stage of wet grinding (dispersion) lagging components. These additives in the grinding process react with water containing dissolved bicarbonates. In the alkaline environment created by sodium silicate, bicarbonates react with alkali to form soda. This forms a mixture of silicate and sodium carbonate. Sodium silicate in the process of grinding penetrates into the cracks and cracks arising from the impact of the grinding bodies on the particles of the emaciated components, thereby creating wedging usi1P1, accelerating the grinding. Sodium carbonate formed by the interaction of sodium silicate with bicarbonate and carbon dioxide reacts, in turn, with selected by water from the structure of eluent calcium hydroxide and magnesium, transferring them to insoluble carbonate and basic ka 505502

Bonate, respectively, with the secondary formation of sodium hydroxide. When sodium hydroxide is added as an additive, the latter partially reacts with bicarbonates and sodium hydroxide.

gas with the formation of sodium carbonate and partly with the silica components of the ground material, thereby obtaining a mixture

 About silicate and sodium carbonate.

Sodium polyphosphate is reacted with bicarbonate, containing 1mis in the source water to form sodium carbonate, due to the free alkalinity, to form a mixture of polyphosphate and sodium carbonate. During the grinding process, the polyphosphate and sodium carbonate react with the calcium and magnesium hydroxides liberated in the plant, converting calcium and magnesium ions to polyphosphate complexes to form sodium hydroxide as a side. The latter reacts further according to the scheme described above. Besides,

25 polyphosphate anions, like silicate, penetrate into the cracks and cracks of the ground material, thereby contributing to the acceleration of its grinding,

30 Additives of silicate or sodium hydroxide or polyphosphate, or their mixtures, act as dispersing agents, accelerating grinding, and also as stabilizing agents as part of a suspension of lean materials. This is due to the fact that during the grinding process, these additives are chemisorbed on the freshly formed surface of the dispersible

40 emaciated materials, thereby passivating this surface and reducing its rheological activity. As a result of such processes, in addition to speeding up the grinding, a decrease in the moisture content of the slip of emaciated materials is achieved without deteriorating it, the flowability, which makes it possible to transfer such shlikerr at low humidity. After displacing the treated such

50, by reducing slurry with a clay slurry, a decrease in moisture is also achieved due to the fact that less water is supplied to the slurry slurry. At the same time, the fluidity of the resulting 5J ceramic crystal is not impaired due to the decrease in the rheological activity of the components of the emaciated slip.

..Mixes of inorganic additives are prepared by mixing the ingredients in the required amounts. The obtained mixtures are introduced for grinding in an amount of 0.02-0.15 wt.%, Since the introduction of individual substances or mixtures in the specified range has an intensifying effect. At the same time, the ratio of ingredients in blends is determined by the fact that, when they are subsequently mixed together with the slip, the emaciated components in the ceramic slip, they have the most effective thinning effect,

In tab. 1 shows the effectiveness of grinding the otokhpitel (perli0, 02

0.08 0.15

0.02

0.08 0.15

0.0025 (2.5%)

0.005 (5%)

0.005 (5%). .

0.005 (5%)

0.005 (5%)

0.010 (10%)

0.010 (10%)

250550

ta) with the introduction of inorganic sodium salts.

In tab. Figure 2 shows the effect of the diluting effect of a slip containing 5%: clay 40, nepheline 25, chalk 7, slab tiles 7 and quartz sand 21, when introduced when grinding the descalers of a mixture of silicate and sodium hydroxide. ten

In tab. 3 shows the dilution of a slip containing 70% nikiforovskoy clay and 30% of aragak perlite by introducing into it when grinding a mixture of 15 silicate, hydroxide and sodium polyphosphate.

Table 1

11.0 Gusta

10.0 Merges

10.0 good

10.0 Suspension

, 02, 08, 15

0.0075 (7.5%)

0.005 (5%)

0.015 (15%)

0.040 (40%)

0.050 (50%)

0.040 (40%)

0.050 (50%)

10.0 easy

10.0 merges 10.0 Easy 10.0 merges 10.0 Same 10.0 10.0

8.0

8.0

9.0

10.0

8.0

10.0

Note. Grinding perlite in the presence of inorganic

Additives - to a residue of 2% on the grid number 0063 with the ratio of perlite: balls: water 1: 1.5: 0.66.

Continued table. one

Compiled by L. Gosteva Editor L. Avramenko Tehred N. Bonkalo

Order 437A / 19 Circulation 640 Subscription

BNUII USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

table 2

Proof-reader I. Erdeyi

Claims (1)

METHOD FOR GRINDING SEMIENT COMPONENTS OF CERAMIC SLIPER by introducing an inorganic sodium salt, characterized in that, in order to accelerate grinding, at least one component from the group is introduced as an inorganic sodium salt: sodium silicate, sodium hydroxide, sodium polyphosphate in an amount of 0.02 -0.15% by weight of thinning components. Nd