SU1469271A1 - Method of producing lining for induction unit of channel-type melting furnace - Google Patents

Abstract

The invention relates to the field of metallurgy, in particular, to methods for producing the lining of an induction unit of a channel melting furnace. The purpose of the invention is to increase the reliability of work and the economy of refractory material due to its repair capacity. The method provides for the installation of an additional template under the block with the melting channel on the template in the form of a pipe with subsequent steps for additional drying of the bottom stones 1 with the specified templates. After removal of these templates, the finished block 2 with the melting channel 3 and the opening for the ceramic pipe 4 with sealing of the gaps with magnesium oxide powder is installed into the resulting niche open on one side. 1 hp f-ly, 2 ill., 1 tab. (L

Description

one

The invention relates to metallurgy, in particular, to methods for producing the lining of an induction unit of a channel melting furnace.

The purpose of the invention is to increase the reliability of work and save the refractory material due to its reparability.

Figure 1 is given the lining of the induction unit channel melting furnace, view in plan; figure 2 - section aa in figure 1.

The lining consists of a hearth 1, a block 2 with a melting channel 3, a ceramic pipe 4. The gaps between the hearth 1, block 2,

ceramic pipe 4 is filled with cable 5. All external joints of pipe 4 and block 2. with the bottom stone 1 sealed with glaze 6. The inductor is introduced into the interior of cavity 7, and after assembling the unit, it is placed on the furnace.

A method of manufacturing the lining of an induction unit of a channel melting furnace includes installing a template in the form of a pipe into a metal outer body to form a cavity under the inductor, then packing the hearth to the level of installing an additional

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the template under the block with the melting channel, the setting of the additional sheet by putting it on the template in the form of a pipe, continuing the filling of the bottom stone to the top of the body of the unit. Then, the lining of the unit is placed on drying, after which the template is first removed in the form of a pipe, and then an additional template is removed. In this case, a niche is formed in the bottom stone, into which a cooking block with a melting channel is inserted, and a ceramic pipe is inserted through the internal cavity of the bottom stone and the block hole. Then, the gaps between the ceramic pipe and the hearth are sealed with refractory bedding, for example MgO powder, and the lining is placed for final drying.

Primer p. The method was tested at the Yerevankabel plant. 2 induction units were manufactured by the proposed method and 2 induction units by a known method and comparative tests were carried out by installing an ILK-16 operating channel melting furnace. During the tests, the condition of the linings of the units was periodically monitored visually and if they failed (cracking, scattering of parts of the linings, reduction of power consumption) they were removed from the furnace, they were inspected.

The main results of the tests are presented in the table.

As can be seen from the table, induction units manufactured by the proposed method have a longer service life and, in addition, are subject to recovery.

Due to the application of the proposed method of lining an induction unit, it is easy to disassemble by first removing the ceramic pipe and then the block from the hearth stone. This allows the induction unit to be repaired, for example, in the event of a block with a melting channel failing by its replacement and subsequent assembly. As a result, the refractory material of the lining of the hearth stone, ceramic pipe is saved due to the maintenance ability. Besides

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maintainability provides a small mobility of the individual elements of the lining (under the stone - block - ceramic tube) relative to each other, which leads to the elimination of thermal stresses. The sealing of the gap with a block, a ceramic pipe and a bottom stone with refractory backfill fixes their position relative to each other. (but not rigidly), prevents the penetration of the metal to the inductor, ensures the elimination of unacceptable temperature stresses in the gaps. All this increases the reliability of the induction unit.

The use of MgO powder as a backfill due to its non-wettability with copper will improve the sealing of the unit and, therefore, the reliability of the induction unit.

Claims (2)

1. A method of manufacturing the lining of an induction single channel melting furnace, which includes the manufacture of a hearth stone around the template pipe to form an internal cavity under the inductor, placing the inside of a block with a melting channel and a hole for the inductor, in which a ceramic pipe is installed, the subsequent lining of the hearth stone, drying of the lining, characterized in that, in order to increase reliability and save refractory material by increasing the maintainability, before placing the block with the melting channel, an additional template is created to create an open from one side block, conduct additional vodka, remove additional template and pipe-template, place the block in a niche, and the subsequent lining of the bottom stone is carried out by compaction the gaps between the block, ceramic tube and hearth refractory backfill. 2. Method POP1, characterized in that magnesium oxide powder is used as a charge. 1 F1 / g.1