SU817014A1 - Flux for ceramic mass - Google Patents

Description

(54) FLUSHING FOR CERAMIC MASSES

one

This invention relates to a ceramic mass of m which can be used in the production of dense sintered ceramic products.

particularly FLOOR TILES :.

A known composition of the flux for ceramics, comprising, wt.%: SiO-i 20-60, BOO, 30-60, CaO and / or MDO 5-30, 0-15 ij.

The closest to the one proposed is a flux, comprising, in wt%: SiOi 60-85, NaO 10-23, 4-17,; Al.j, 03 0.1-0.3; Kao 0.1-0.3; CaO 0.6 -; 0.7; MqO 0.2-0.4 f2l.

However, the addition of flux of this composition makes it impossible to obtain tiles with a natural color after firing. This precludes the use of these masses to obtain, for example, white tiles from white-burning clay. In addition, this mass has a short working firing temperature range.

The purpose of the invention is to extend the working firing range and obtain white tiles.

The goal is achieved by the fact that the flux, including SiO, CaO, MqO, KAO and additionally

contains the following ratio of components, wt.%:

SiOj34-67,8

AI Oj3-5

CaO9-12

MgO0,1-2

K ,, 1-2

Na.2.010-20

6.0, 10-25

0

The flux is prepared as follows. Quartz sand, soda, a material containing chalk or limestone is melted in a bath OR other glass. boiled oven at 1300-1350s.

5 The melt formed is cooled in water. Non-plastic component - the flux is ground in a ball mill using a wet method. To a residue (sieve no. 0.63), 0.4-2.5% with a moisture content of 50-55%. Then clay is added, and the whole mass is mixed for 40-60 minutes. The resulting suspension is dried in a spray dryer to a moisture content of 6-8%. Ceramic tiles for floors or other uses are pressed from the resulting powder. Tiles are dried to a moisture content of 0-0.5% at 180a

220 ° C for 30-60 minutes and fired in the slot of the roller furnace L 950-1020 C. The total firing time. 5I-90 min.

Composition, flux, wt .-%:

Colour

Examples of the composition of the tile mass with the proposed flux are given in table. one,

Physical-mechanical properties of the burned tiles are given in table 2. Table 1

table 2

White Bee Pink Pink

Claims (2)

Claim Fluxes for ceramic masses, comprising S i 0 ^, AI ^ Oj, CaO, MgO, K _and 0 and Ya ^ O, characterized in that, for the purpose of working the firing interval extensions minutes obtain white tiles, it further comprises in _{the first} Ga in the following ratio of components, wt.%: SiO-i 34-67.8 A1d_0ъ 3.0-5.0 9.0-12.0 0.1-2.0 0.1-2.0 10-20 10-25 CaO 50 MdO K ^ O NaD B / fO-j 55 Sources of information taken into account in the examination 1. French application No. 2025131, cl. From 04 to 33/00 ·, published. 1970. 2. Copyright certificate of the USSR _th0 No. 567704, cl. S 04 B 33/16, 1976. ВНИИПИ Order 1193/30 Circulation 660 Subscription Branch of the PPP Patent, Uzhgorod, ul.Proektnaya, 4