JPH10297947A - Kiln burner for cement firing - Google Patents

Abstract

(57) [Summary] (Problem corrected) [PROBLEMS] In a conventional structure in which a castable refractory at an outer peripheral portion is supported only by V-shaped and Y-shaped studs, it is difficult to maintain sufficient castable strength, and the castable refractory becomes castable during use. A problem that cracks, cracks, and the like occur and lead to breakage due to peeling and falling off has been a problem. SOLUTION: A plurality of V-shaped and Y-shaped studs 6 are erected on a cylindrical iron core 1, and an expanded metal 3 is stretched around the cylindrical iron core 1, and the studs 6 and the expanded metal 3 are embedded. Another object of the present invention is to provide a kiln burner for cement firing, characterized in that an outer castable refractory 5 is constructed in such a manner as to perform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a kiln burner for cement firing mainly for improving the durability of an outer castable refractory.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 1, a cylindrical iron core 1 of a kiln burner for cement firing is provided with a V-shaped iron core to prevent the outer castable refractory 5 from falling off during use.
The V-shaped and Y-shaped studs 6 are buried in the castable refractory 5 on the outer periphery.

[0003]

Originally, in a structure in which the outer peripheral castable refractory 5 was supported only by the V-shaped and Y-shaped studs 6, it was difficult to maintain sufficient castable strength, and the castable refractory 5 was cracked during use. , Cracks and the like occur, leading to problems such as peeling and breakage due to falling off.

[0004] A conventional kiln burner for cement firing is as follows.
The tip portion is inserted into the rotary kiln, and pulverized coal or heavy oil is blown from the discharge port 4 together with air as a heat source.
Particularly when using a kiln burner for cement firing, the secondary air containing dust from the cooler blows up the cracks due to the above-mentioned causes, causing wear to the lower end of the kiln insertion tip, causing the cracks to expand and the outer peripheral castable fireproof. Thing 5
Peeling and falling off, and the deformation and blockage of the discharge port 4 due to heat are caused, thereby limiting the service life of the kiln burner for cement firing.

[0005] The present invention is to improve the castable support method of the kiln burner for cement firing to maintain the castable strength during use, to suppress the occurrence of cracks and cracks, and to reduce the occurrence of secondary air at the kiln insertion tip. It is an object of the present invention to prevent the outer castables from peeling and falling off even in a portion where wear is added.

[0006]

In order to solve the above-mentioned problems, in the present invention, a plurality of V-shaped and Y-shaped studs 6 are erected on the cylindrical core 1 and surround the cylindrical core 1. A cement kiln burner characterized in that the expanded metal 3 is stretched in the same manner and the outer castable refractory 5 is constructed so that the stud 6 and the expanded metal 3 are buried.

[0007]

FIG. 2 is a diagram showing the application of the product of the present invention to a kiln burner for cement firing of a rotary kiln having a 2000 T / D cement clinker firing capability, and FIG. 3 shows a stud and expanded metal used in the method of the present invention. FIG. 4 is a development view showing a planar relationship of FIG. In the figure, reference numeral 2 denotes a stud weld.

[0008]

The cement kiln burner of the present invention was mounted on a rotary kiln having a capacity of 2000 T / D cement clinker and was actually used. The durability of conventional products is
In about 6 months, the castable refractory at the lower end of the burner fell off. However, the kiln burner of the present invention can be used for one year under the same operating conditions, and the castable refractory at the lower end of the burner has few cracks and castable refractory. Peeling of objects,
No dropout occurred, and a castable refractory strength retaining effect was observed. As a result, the durability was improved by a factor of two, and the effect was remarkably confirmed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a conventional kiln burner for firing cement.

FIG. 2 is a cross-sectional view of a kiln burner for firing cement according to the present invention.

FIG. 3 is a plan view showing the relationship between the studs and expanded metal of the kiln burner for cement firing of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical iron core 2 Stud welding part 3 Expanded metal 4 Discharge port 5 Castable refractory 6 Stud

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshikazu Koma 2669-2 Hida, Hida-cho, Toki-shi, Gifu

Claims (1)

[Claims] In a kiln burner for cement firing, an anchor is erected on a cylindrical iron core of the kiln burner, and an expanded metal is stretched so as to surround the cylindrical iron core, and the anchor and the expanded metal are buried. A kiln burner for cement firing characterized by the construction of castable refractories.