SU730657A1 - Ceramic mass for manufacturing acid-resistant articles - Google Patents

Description

I

The invention relates to chemistry and can be used in the building materials industry and the chemical industry.

The famous ceramic mass l for the manufacture of acid-resistant products, including clay, chamotte, magnesium-containing component from the group magnesite, dunite and alkali-containing component from the group nepheline-syenite, perlite in the following ratio, wt. %:

Clay4O-7O

Shamot10-30

Magnesium-containing component5-10 Silk-containing component 1O-25 The heat resistance of products based on the known mass is within 15-25 heat cycles, with an absorption of 4%, an acid resistance of 9 7.3%, and the distance from compression under compression is 150 MPa, with 42 MPa when bending.

Closest to the invention: Ammonium weight: for the manufacture of acid-resistant products, including,%: 7Oj clay, chamotte 2O, and silica-containing component 10. The heat resistance of the products is at least 30 heat cycles, water absorption 6.8-7.4%, acid resistance 96.2-97.8% G is the limit of density in compression of 49-68.6 MPa, in bending 1O-13.5 MPa 2.

The disadvantage of these ceramic masses is the low acid resistance and high water absorption of the products.

The purpose of the invention is to increase the acid resistance and reduce water absorption of products.

This gel is achieved by the fact that the ceramic mass for the manufacture of acid-resistant products, including clay, chamotte and silica component, additionally contains either PgO-HSiOi or RF, where R-Na or K 37 in the following ratio of components, weight. %: Clay7-25 Shamot10-40 R2 CO or RO-n5iO, i or RF (in terms of) О, Кремн 93 all that contains the rest component. The clay used is kao. Pinite, mont-Morillonite or mono-termitic clay, As Otoshi tel - silica solder component from the group of quartz, loess, sandy loam and fireclay. The preparation of the composition is carried out as follows. The pre-desumed clay, an alkali metal compound R, CO3 or Rj O-nSl Qji or RF and part of a silica-earth component, each with a ratio of 2p -66iO2, is co-milled to the grinding fineness corresponding to the specific surface on the PSC-2 device. The crushed components are mixed with the rest of the silica-containing component, wet mass to a moisture content of 6–10%, mix up a uniform distribution / shade of moisture, and press powder on presses for semi-dry pressing of electrolytes, which after drying are burned with 1 1 10 5 0 1150 ° C. During firing, interaction occurs primarily in the comminuted component, with the formation of crystalline substances of composition 6SiO, which are analogs of acid-resistant natural minerals, for example, albite or orthoclase. In the process of formation of these substances, their surface also interacts with the unmilled silica-containing component, which is resistant to the action of acids, which contributes to the dense shard with high acid-resistance and low water absorption. Acid-resistant tiles can be made of ceramic material. Bricks, KOLY1. Example 1 A mixture of pre-dried at 1O5 С components containing weight%: clay component - Betonite of Cherkassy locus 7, silica-containing component of peso Knavskoye deposit 10, so technical 2.6% (in terms of a.jO - 1.5), podrgat joint grinding in a vibromill to grinding fineness corresponding to a specific surface of 4100 in PSC-2. The resulting mixture is mixed with the remaining components, weight%: chamotte 1O, silica-containing component - loess of the Kiev Field 71.5, moistened to 8% moisture, stirred until a uniform distribution of moisture. The obtained press powder is molded on a mold by a tile of 10 mm in size, which is dried on a radionionic dryer at lOS-lSO C, placed in caps and fired in a muffle furnace for 34 hours with isothermal aging at 3 hours. mechanical indicators: compressive strength .203 MPa, 45.5 MPa bending, water absorption 0.89%, kg: - lot resistance according to GOST 47364 - 99.44%, heat resistance 18 heat cycles, reducing the weight of the tiles after boiling in acid 7O% concentration within 7OO h is O, 6 9%. Example 2. A mixture of components, preliminary dried at 105 ° C, containing wt.%: Clay from the Chacharovskoye deposit 25, quartz sand 18, 7, and a cinder mixture of 8.6 (in terms of Mill O-5), is subjected to joint grinding in vibromelide to the grinding fineness corresponding to the 5OOO surface texture of PKS-2. The resulting mixture is mixed with the remaining components, wt. %: chamotte 15, river Dnieper sand 36.3, moistened to 7% moisture, mixed to an equal distribution of moisture. The press powder obtained is molded on a semi-dry press press “vani brick pa3Mq oM mm, which, after drying in a tunnel dryer, is fired in a muffle furnace of the furnace for 48 hours with isothermal aging at 2 hours. After firing, the products have the following physical and mechanical properties; limit compressive strength 146 MPa, bending 10.4 MPa, water absorption 3.6%, acid resistance according to GOST 473-64 98, 9%, heat resistance 12 heat cycles. Example 3 A mixture of pre-dried at 1O5 C components containing, in weight. %: the clay component — kpolin of the Prosnovsky place of birth 9, the silica-containing components — the pess of the Kievskoye deposit 10 and the anhydrous sodium metaslicate NajO-SiOg 7.1 (in terms of Na O 3, 5), are co-milled in the mill until tonnes is ground, Corresponds to the specific surface 3100 in PKS-2. The resulting mixture is mixed with the rest of the components, weight. %: chamotte 25, silica-containing component - loess of the Kievskoe deposit 52.5 is moistened to 8% humidity and stirred until a uniform distribution of moisture. From the press powder obtained, a plpt of 1O size is formed on the mold (HZO1Om which is placed in the drip pan in the radiation drier after subsampling and roasted in a muffle furnace for 34 hours with an isothermal exposure of 2 hours after calcination, the products have the following physical and mechanical indicator: compressive strength 127 MPa, at 30.2 MPa, water absorption 1.2%, acid resistance according to GOST 4 73-64 software, 69%. heat resistance 32 heat cycles. Examples 4 and 5, Mixes pre-drying at 105 ° C to constant weight components consisting of a clay complex nenta kaolta, sand of a river n alkali metal compound, is subjected to joint grinding in a laboratory ball mill to a specific surface 3630 on the PSC-2 instrument. Then they are mixed with the other components: chamotte and silica contained in sandy loam from the Kievskoe deposit, moistened to 6% moisture is transferred to a uniform moisture distribution.From the obtained press powder they form shapesE-CYLINDERS with a height and diameter of 50 mm, which, after drying in an oven at 100 ± 5С, are burned in a muffle electric furnace for 18 h zotermicheskoy heating at 2 hours. The properties of the obtained samples after baking are shown in Table.

87,813,7

92,114,2

99.41

2.02

2.97

Claims (2)

99,42 Technical efficiency of the invention 5 consists in obtaining acid-resistant LID with acid resistance of 98.9-99.69%, water absorption of 0.83-3.2%, limit 7 of compressive strength 58-203 MPa, bending 10.4- 45.6 MPa, heat resistance 12-32 heat shifts. The results of studies of the resistance of acid-resistant materials in boiled and choleric acids for a long time have shown that the process of their corrosion is decaying, in contrast to traditional acid-resistant materials whose dissolution process intensifies with time. The inventive formula: Ceramic mass for the manufacture of acid-resistant products, including Biy gly, chamotte, and a crumbseil-containing component, characterized in that, in order to reduce the acid resistance of the water suppressor, it additionally contains either hSiO or RF, where R is Na or K in the following Ratio of components, weight,%: Clay7-.25 Fireclay 10-40 or R O-MSiOg or RF {in terms of RjO) 0.8-5 Silica-containing cc "componentOther Information sources taken during the examination 1. Authors USSR certificate № 444756, cl. From 04 B ZZ / OO, 1972. 2. New technology in ceramic production. Proceedings of the Institute NIIstroykeramika, M., 1977, higher. 42, p. 61-63.