SU926482A1 - Rotary kiln lining - Google Patents

Description

(54) LIGHTING OF ROTATING FURNACE

one

The invention relates to the building materials industry and concerns the lining of the preparatory zones of rotary kilns used for the firing of cement raw materials and other materials.

A lining of a rotary kiln is known, comprising a layer of refractory concrete and reinforcing layers; The elements are made in the form of wire spirals G1.

A disadvantage of the known lining is a short service life. This is due to the fact that during the lining of the chain zone, the chains quickly abrade the concrete and tear off the reinforcing spirals.

The closest to the technical essence of the invention is the lining of a rotary kiln containing a layer of betsna and reinforcing elements made in the form of chains attached to the body of the kiln G2.

A disadvantage of the known lining is a short service life, since when the kiln rotates the chain curtain chain

abrade a layer of concrete to the level of reinforcing elements - chains. It also increases heat loss through the furnace body.

The purpose of the invention is to increase the service life of the lining.

This goal is achieved by the fact that in the lining of a rotary kiln that holds a layer of heat-resistant concrete and reinforcing elements made in the form of chains attached to the furnace body, alternating chain links ;; attached to the furnace body vertically, and the thickness of the concrete layer is equal to the width of the chain link.

Figure 1 shows the lining in the plan, a partial section; FIG. 2 is a section A-A in FIG. one.

The lining of the rotary kiln contains a layer of heat-resistant concrete 1 and reinforcing elements made in the form of chains attached to the body 2 of the kiln.

The link of 3 chains is attached to the core 2 vertically, and the links 4 alternating with them are at an angle.

The angle of inclination of the links 4 is 10-80 °. The lower and upper limits are chosen experimentally and for. Beats t only from the structural dimensions of the chains, then from the width of the link and the diameter of the rod,

Tontu raa concrete layer 1 is equal to the width of the chain link.

In the described lining, links 3, vertically attached to the furnace body, prevent lining abrasion along the entire height of the chains of the chain curtain and the calcined material (stabilization of the lining layer).

When the furnace is operating, the 4-lining layer remains constant and is equal to the width of the link of the reinforcing chain (according to the outer diameter of the link when using chains with round links, the width of the link is equal to the outer diameter of the link).

For example, when using round chains with a pitch (inner diameter). 12O mm and a bar diameter of 25 mm, the thickness of the concrete lining layer is 17O m. This coating is applicable in the higher temperature zone (relative to the entire concrete section), for example, in the zone of built-in heat exchangers.

In the cold half of the chain curtain for reinforcement, it is advisable to use oval chains with a pitch of 120 mm, a bar diameter of 25 mm and a link width of 1OO mm In this case, the thickness of the lining layer is 1OO mm.

Alternating with links 3, links 4 are stops (straps) that prevent the links 3 from deviating from the vertical position relative to the furnace body 2. This ensures the reliability of the fastening of reinforcing elements, and thus the constancy of the thickness of the concrete layer 1.

Making the lining with reinforcing elements in the form of chains, alternating parts that are vertically attached to the furnace body, will increase the service life of the lining and reduce heat loss through the furnace body, which will save heat resistance of concrete and fuel.

Formula inventions

The lining of the rotary kiln, containing a heat-resistant Betsa layer and reinforcing elements made in the form of chains attached to the kiln body, is characterized in that, in order to increase the service life of the lining, alternating chain links are attached to the kiln body vertically, and the thickness of the concrete layer equal to the width of the chain link.

Sources of information taken into account in the examination

1. US patent number 3718323, cl. 263-40 published 1973.

2. Anisimov KP, and others. Early development of design capacity at the Akmnsky Combine. Cement, 1977, No. 8, p. 2

Claims (1)

Claim Lining of a rotary kiln containing a layer of heat-resistant concrete and reinforcing elements made in the form of chains attached to the furnace body, characterized in that, in order to increase the lining life, alternating chain links are vertically attached to the furnace body, and the thickness of the concrete layer is equal to the width of the link chains.