SU924011A1 - Method for making cordierite products - Google Patents

Description

The invention relates to the production technology of ceramic products and can be used in electrical, electronic, radio and other sectors of the economy.

For hot molding of ceramic iz ⁵ dely apply a number of ways, differing from each other, usually roasting equipment and methods [T},

* Closest to the proposed method for the manufacture of corsetting products, in which the ceramic slurry is dehydrated on filter presses, then granulated, passing the cake through a perforated mouthpiece of a vacuum press for polishing granules with a diameter of 3 mm. The granules are dried, calcined, ground, and a thermoplastic slip is prepared from the resulting powder. From this slurry on ligey- _χ GOVERNMENTAL machines cast products, which are then baked 'in fireclay .korobah in filling technical gonkodispersnogo alumina

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The known method has the following disadvantages: the scarce raw material alumina used as an adsorbent is wasted because when it is used for several roasting it needs to be replaced: uneven heating of the products placed in the finely dispersed bedding, especially with a thick layer and heat consumption on warming backfill.

The purpose of the invention is to reduce energy costs, saving raw materials and improving the conditions of a pile of workers.

This goal is achieved by the fact that in the method of manufacturing cordierite products, including granulation of the mixture, the preparation of a thermoplastic slip, molding products and firing in the adsorbent, the slurry is prepared from the granules of the charge, once used as an adsorbent.

Moreover, the granules are made with different,

measure 50-300 microns.

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924011

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The proposed method is as follows.

From the mixture, including talc, clay, electrocorundum and chamotte prepared by any of the known methods granulated 5 powder (for example, drying the spray by spraying in a spray dryer). In the process of drying at a temperature of 300500 C, the material takes the form of granules with a size of 50-300 microns. More than ⁰

small grazules should not be used, as if they are used further, their sticking together or aggregation is possible.

Hot-cast products are placed in a layer of granular powder of the same charge composition as the products themselves and are fired.

At the same time, after roasting, this powder is used as a source component for hot casting, which is further subjected to grinding and plasticization and at the same time it is an adsorbent: bundles.

The advantages of this method are concluded: It is unnecessary to use technical alumina or other commercially available adsorbents as an adsorbent, which gives a direct economic effect; relatively small amount of powder filling, which pomei ^ enes calcined product ensures a uniform progress Kapsel volume and hollow form granules adsorbent filling gives a higher adsorption capacity and also provides possibility ^WHO-35 fine grinding cake without significant energy costs.

Example: From a water slip of a cordiero mass, including clay, talc, electrocorundum and chamotte, using a spray-drying method ⁴⁰ in a anti-burner dryer at 400–50 ° C, a granular powder with a grain size of 50 to 300 microns is obtained. The maximum size of the granules is regulated by the hole shape - 45 sunK1Y. Products molded using the τορί method, which are cast, are loaded into the drip pan, filled with the obtained powder and placed in a tunnel kiln. The temperature rises by 2 5 ^e C per hour to 600 Cu 50, further by 50 C to the end of roasting, the roasting time is 40-44 hours. Among roasting to 1000 C, it is oxidizing, then to the end of roasting it is weakly reducing. The final firing temperature 1360 C (without exposure). After firing, the product is removed from the filling, and it is used in a further production cycle, for which the filling is ground in a ball mill until the residue on the L / 006 sieve is 35%, then a thermoplastic slip is prepared from the resulting powder on a bundle of paraffin, wax and oleic acid, from which products are cast, which are fired in the filling of granular powder according to the above scheme.

When applying the proposed method in comparison with the known method, the tendency of the adsorbent to dust formation during the loading and unloading of products is significantly reduced, which makes it possible to improve the conditions of the burner pile. In addition, the quality of products increases, as it eliminates the possibility of their clogging with foreign material.

Claims (2)

Claim 1. A method of manufacturing cordery products, including granulation of the charge, preparation of a thermoplastic slip, molding of products and burning in an adsorbent, distinguishes them, which, to reduce energy costs, save raw materials and improve the working conditions of workers, the slip is prepared from the granules of the charge, once used as an adsorbent. 2, The method according to π, 1, distinguishing with I heme, that make granules with a size of 50-300 microns.