SU893917A1 - Enamel slip - Google Patents

Description

(54) ENAMEL SLICK

The invention relates to the enameling of steel products and can be used to apply an enamel coating on steel products, for example pipes.

Known enamel slip RZ containing, by weight.h .: Frit 100 Fine sand 10-15 Ammonium molybdate 0.7-1.0 Borax 0.2-2.4 Palygorsk 1.6-2.0 Water 50 The known composition of the slip requires relatively high firing temperature, which contributes to the formation of coating defects, in particular, blistering, warping, etc.

High firing temperature caused by the presence in the composition

palygorskite possessing refractory properties.

The closest to the present invention is the composition of the enamel slip Qzl, containing parts by weight: Frit 100, silica sand 1-1.5 J ammonium molybdate 0.2-0.6 J clay Glukhovsk 3-5; chromium oxide 1-1.5 water 40-50; zirconium concentrate 1.25-2.50, at least, two oxides from the group: magnesium oxide, calcium oxide, zinc oxide, tin dioxide 0.45-0.7.

A disadvantage of the known composition is elevated temperature.

15 roasting.

The purpose of the invention is to reduce the firing temperature.

This goal is achieved by the fact that the enamel ischiker, including

20 Frit, sand, water, oxide of divalent metal, additionally contains apatite concentrate and a compound from the group of sulfates and trivalent metals or water-soluble amino compounds with the following ratio of components, parts by weight: frit 100} peeks 15-40 water 40-50 oxide of divalent metal 0.5-3i Apatite concentrate 5-IU; a compound from the group of sulfates of divalent and trivalent metals or a water-soluble amino compound .0.3-1. Apatite concentrate is produced from apatite ore, which is widely blasted in nature as a rock-forming mineral. Ds of slurry preparation are used for reactants manufactured according to GOST and TU, quartz sand TU 21 Ukrainian SSR 526-70 GOST 703 -54, magnesium oxide, calcium according to GOST 4526-67, magnesium sulfate, aluminum according to GOST 4523-67. Specific compositions of the slurry are shown in Table. 1. The preparation of the slip is carried out as follows. Weighed quantities of the constituent components are added to the ball mill, the apatite concentrate is pre-milled, the mixture is finely ground to a grinding fineness determined 1.01, 2 cm by the method of Shsenko (OST 417l). Dp of the slurry preparation are used frits (Table 2) f, used for both groundless and coating enamels, in particular, laminating enamel 25, coating enamel 175, etc. The resulting slurry, which is a suspension, is applied to the product by dipping, after which the product is dried and then fired. Coatings obtained on the basis of the proposed formulations have the properties presented in table. 3. The proposed formulations give a positive effect when using, which consists in improving the quality of products, reducing energy costs, replacing decimation materials, etc. Table 1

300

0.05 Brilliant schA, smooth-,

280

0.04 Same 300

0.05 Smooth, not very

300

0.05 Spiked, smooth Formula of the invention

Enamel slip, including frit, sand, water, oxide of bivalent metal, characterized in that, in order to reduce the firing temperature, it additionally contains apatite concentrate and a compound from the group of sulfates of divalent and trivalent metals or water-soluble amino compounds in the following ratio, wt. including:

very best schA

ka, tight

No breakdown

Same ka tight

ritta 100 sand 15-40 water 40-50; a bivalent metal oxide of 0.5-3;

Apatite concentrate 5-10; compounds from the group of sulfates of two- and Tpeca-valent metals and a water-soluble amino compound 0.3-1.

Sources of information taken into account in the examination

1. Authors certificateSSSR 558880, cl. From 03 to 7/00, 1977.

2, USSR Copyright Certificate No. 574409, cl. From 03 C7 / 00, 1975.

Claims (2)

Claim An enamel slip comprising frit, sand, water, a bivalent metal oxide, characterized in that, in order to reduce the firing temperature, it additionally contains an apatite concentrate and a compound from the group of sulfates of divalent and trivalent metals or water-soluble amine compounds in the following ratio of components, weight .h .: -Freet 100> sand $ 15-40 water 40-50; M oxide of a divalent metal of 0.5-3; apatite concentrate 5-10; ' connection. from the group of sulphates of two- and trecca9S f ⁴ tape mtabs and ^ and a water-soluble amino compound 0.3-1. ⁴⁰ Sources of information taken into account in the examination 1. Copyright certificateSSSR No. 558880, cl. C 03 C 7/00, 1977. 2. Copyright certificate of the USSR “No. 574409, cl. C 03 C 7/00, 1975. Compiled by S. Belobokov