SU1323205A1 - Method of producing ceramic cores - Google Patents

Abstract

The invention relates to foundry, in particular, to the process of making ceramic rods. The purpose of the invention is to increase the stability of the strength characteristics of the rods - due to the fact that, before mixing with the plasticizer, oxide and chloride Mg are added in a ceramic powder in a ratio of 4: 6, performed as a cement material The steroids are carried out at a temperature sufficient to completely remove the plasticizer, after which the rods are cooled and impregnated with water without removing any clay from the alumina. The strength of the rods is formed by the formation of the HOMgO refractory polymer (-Mg-0-) nMgClj, which holds the particles of the refractory filler — ceramic powder. The highest strength of the rods is achieved when the content of oxide and Mg chloride in the mixture is 2%. 1 tab. e (l oo to so ka ate

Description

This invention relates to a foundry, namely a process for making ceramic rods,

The purpose of the invention is to increase the stability of the strength characteristics of the rods.

Example. Ceramic mixture consisting of grinding powders and micro-grinding powders of electrocorundum and aluminum powder is mixed with a high-concentration material in the form of oxide and magnesium chloride (taken in the ratio 4: 6, and low-melting liquid

five

ten

In this production of ceramic rods, their strength is formed by the formation of the refractory polymer EOHgO () nKgCl which holds the particles of the refractory filler. The amount of cementing material in the ceramic mixture can vary from 0.5 to 15%. The greatest strength is achieved when the content of MgO and MgClj is 2%,

Burning with sterlet at a temperature sufficient to completely remove the plasticizer provides, with plasticizer, to obtain a homogeneous thermoplastic mass with a decrease of the box with a fixed volume

At a temperature of 95-100 ° C. At this temperature, the penetration of a certain fraction of the curtain is pressurized under pressure in the product, regardless

0.25-0.27 MPa into the metal from its interaction with the plasticizer mold. What is obtained by such a device is also guaranteed by standing strings placed in a refractory 20 process.

burned into the furnace at 700 ° C for 1 hour at a rate of temperature rise in the furnace, then the box is cooled, ay with the furnace to 150 ° C, removed from the furnace, cooled to room temperature and filled with a damper ( water).

. After impregnation with a tray cage, it is dried at 3 hours.

The finished rods are removed from the box and 3: clear,

Thus, the proposed samples from a mixture of the same composition

the samples have a strength of 4.86 Sha, max (but without a cementing additive); the deviation is maximum from the maximum deviation of the average value of 0.33 MPa or Os4%, from the average value of 1.1 Sha or 37%,

The average deviation from it is 0.14 Sha or 3%

In this production of ceramic rods, their strength is formed by the formation of the refractory polymer EOHgO () nKgCl which holds the particles of the refractory filler. The amount of cementing material in the ceramic mixture can vary from 0.5 to 15%. The greatest strength is achieved when the content of MgO and MgClj is 2%,

Burning the sterlet at a temperature sufficient to completely remove the plasticizer provides, when zadivka box with a fixed volume

Impregnating the rods with a sealer without removing alumina allows the product to be molded regardless of the lacquer of the cementing material;

to ensure the integrity of the product in the period when the temporary bond is already removed and the worker is not yet formed.

Rods 210x65x (05b-3e7) mm were manufactured using this method.

different complexity in geometry. The tests were carried out on a tensile testing machine P-0.5. The test results are given in the table.

Samples from a mixture of the same composition

the average deviation from the average value of 057 MPa or 23%. In this way, the proposed method allows to significantly increase the stability of their strength characteristics.

Claims (1)

Invention Formula An alumina strip, characterized in that, in order to increase the stability of the strength characteristics of the rods, before it is mixed with the plasticizer, magnesium oxide and magnesium are additionally introduced in a ratio of 4: 6, and the roasting of the rods is carried out at a temperature sufficient for Method of making ceramic I erased the day, which includes cooking .... y. ,, „„,.,. mixtures of ceramic powder and lightly-complete plasticizer removal, a high-melting plasticizer, the molding of the rods and the filling of alumina from it from the rods, the roasting in the deputy is cooled and impregnated with water. 3232054 An alumina strip, characterized in that, in order to increase the stability of the strength characteristics of the rods, before it is mixed with the plasticizer, magnesium oxide and magnesium are additionally introduced in a ratio of 4: 6, and the roasting of the rods is carried out at a temperature sufficient for .... city ,, „„,.,. - t Full plasticizer removal, pic what are the rods and clay ma cooled and soaked with water.