SU1416191A1 - Method of producing the hydrocyclone lining - Google Patents

Abstract

The invention relates to a technique for the separation of heterogeneous liquid media and allows for improved durability and reduced installation labor. In the manufacture of the lining, elements (E) are formed from a carbide-silicon ceramic mass, thermally processed and collected by E outside the body (K) of a hydrocyclone. At the joints of E, a layer of binder is applied (c), then E is calcined and set in K. As C, a mixture of the following composition is used in the first embodiment, wt%: feldspar 48-62; forsit borosilicatna 13-17; clay refractory rest. In the second variant, the following mixture in wt.% Is used as C: silicon carbide black fraction minus 40 microns 70-78, lignosulfonate — grades A 22-: 30. 2 hp f-ly, I tab. and fS (L

Description

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The invention relates to technology; separation of heterogeneous liquids, I in particular, to methods of lining (working surface of hydrocyclones,: And can be used in mining, concentrating, abrasive, and others: industrial zones.

The purpose of the invention is to increase the durability and reduce the complexity of installation.

The proposed method is carried out as follows.

In the molds formed cones and; rings from a mixture containing polycry-; steel silicon carbide and ceramic binder of known compositions, for example highly dispersed silicon carbide and lignosulfonate. Forming I is carried out by the method of static press; sizing to size; 2.5-2.8 g / cm. Received; billet elements are dried for i 10–12 h at 100–110 ° C, cooled, and then the casing block assembly is assembled by stacking conical and then cylindrical elements. A binder layer with a thickness of 1-3 mm, prepared by mixing, for example, in a ball mill of the following components, in wt.%, Is applied to the joints of the elements: feldspar 48-62; frit borcilicate IB -l; the rest refractory clay, or a layer of binder containing, in wt.%; silicon carbide black fraction minus 40 microns 70-78; lignosulfonate brand A 22-30.

The assembled unit is placed in a tunnel or chamber furnace, kept at 1450 + 20 ° C for 100-112 h, cooled to room temperature and installed in the body of a hydrocyclone. In the process of burning the lining block, sintering of the ceramic mass of the lining elements as well as the binder occurs, which ensures a solid connection of the elements into a single block.

PRI me R 1. From the molding mixture containing, wt.% :.

Carbite flint black.

grit, mm .35; .;.; 0.4-1.0 50

Ceramic bond 15 (binder composition 1, wt.%: Silicon carbide black fraction minus 40 microns 75; lignosulfonate grade A 25), molded to a density of 2.8 g / cm in special molds for hydraulic

5 0 5 About

Q with

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P-479 press with a force of 400 ton-force; blanks of elements in the form of cones and rings for hydrocyclone GTsM-150. The obtained blanks, after drying out in an oven for 10 hours at 100 + 10 ° C and cooling to room temperature, were assembled into a block with a layer of about 2 mm applied to the joints of the elements. As a binder 2 used a mixture containing, wt.%:

Field spar 50

Frit borcicatna 1 5

Clay Refractory 35

The fired unit was fired in a tunnel kiln at 1450 + 20 ° C for 112 hours.

The definitions of the physicomechanical indices of the linings byp were made of the same molding composition, the samples in the form of two rings connected to each other by means of connecting 1 and 2 different compositions, as well as by means of a cement mortar (portland cement 500). Drying and roasting were carried out with the same parameters as the lining elements.

The resulting samples were tested for rupture on the machine. UMM-5 and for wear in the joints of elements on the sandblasting installation of the brand 91 at 15 MPa.

The table shows the test results of the samples.

As follows from the table, samples made of carbide-silicon mass and bonded with the pre-bonded links 1 and 2 have a higher wear resistance and tensile strength compared with samples bonded with cement mortar. Decreasing or increasing the components in the compositions leads to a decrease in mechanical strength and an increase in wear samples.

Claims (3)

1. A method of manufacturing a hydrocyclone lining, comprising molding elements in the form of cones and rings from carbide-silicon ceramic mass, heat treatment and assembly of elements, characterized in that, in order to increase durability and reduce the labor intensity of installation, the elements are assembled outside the body hydrocyclone from neob31D161 The bonded elements are applied onto the junctions of the elements of the binder layer, then the assembled block is fired and placed into the body of the hydro cyclone. 2. The method according to claim I, characterized in that a mixture of the composition, wt.%, Is used as the binder: Feldspar 48 - 62 d Frit borcicatna 13-17 Clay refractory Rest 3. The method according to claim 1, wherein a mixture of the composition is used as a binder, May,%: Carbide Flint Black fraction minus AO µm 70 - 78 Lignosulfonat brand L22 - 30 Indicators The content of components, wt.% ;. 48 13 39 Feldspar Frit boron silicate Clay refractory  Silicon carbide black fraction minus 40 microns Lignosulfonate grade A Properties: Tensile strength, kgf / cm 85 Wear, mm 0.7 55 62 46 64 15 17 12 19 ---- .30 21 42 17 --7074786880 3026223220 90 88 66 70 156166162130128 0,65 0,7 0,9 0,85 0,50,50,550,70,65 Note: When testing specimens bonded to cements mortar tensile strength equal to 48 kgf / cm, wear 1.4 mm.