JPH072890U - A blown air burner for rotary kiln - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate energy loss due to residual coal in a rotary kiln in which carbonaceous material is added to a raw material and charged and heated by a heavy oil burner to carry out a combustion reduction reaction. [Structure] This is a blown-air burner arranged so as to directly blow air to the accumulated matter in the kiln near the heavy oil burner at the discharge end of the rotary kiln.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a blown air burner installed in a rotary kiln for reduction of non-ferrous smelting.

[0002]

[Prior art]

 In a rotary kiln for the reduction reaction of non-ferrous smelting, coke is mixed as a carbonaceous material into the raw material to be treated and charged, and reduction is performed by heating with a heavy oil burner from the discharge end of the rotary kiln. In this case, in order to sufficiently reduce the target element in the raw material, it is necessary to add an amount of carbonaceous material in excess of the theoretical amount of carbonaceous material required for reduction. Excess carbonaceous material was discharged from the rotary kiln discharge end together with the burnt ore as unburned coal (residual coal).

[0003]

[Problems to be solved by the device]

 The purpose of the present invention is to eliminate the above-mentioned energy loss due to residual coal, to more effectively burn the carbonaceous material in the residue in the rotary kiln, and to reduce the energy consumption rate of the rotary kiln.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides an air provided in a rotary kiln in which carbonaceous material is added to a raw material and charged, heated from a discharge end side by a heavy oil burner, and a combustion reduction reaction is performed by the carbonaceous material. It is a burner, which is a blowing air burner for a rotary kiln, which is arranged to blow air directly to the accumulated material in the kiln near the heavy oil burner at the discharge end of the rotary kiln.

[0005]

[Action]

 According to the blow-off air burner of the present invention, air (air) is blown to the residual coal in the vicinity of the discharge end in the kiln, and combustion is promoted. Therefore, the combustion heat of the residual coal is the heat input to the rotary kiln. Becomes Therefore, the energy intensity of the rotary kiln is reduced.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. In the figure, 1 is a rotary kiln, and 2 is a discharge end side hood of the rotary kiln. 3 is a heavy oil burner for heating. Reference numeral 4 denotes a blow-off air burner made of a heat-resistant stainless steel pipe, which is arranged so as to blow air to a portion of the furnace near the discharge end of the accumulated material 5.

In the present embodiment, the blowing air burner 4 has an outer diameter of 150 to 200 mm (inner diameter of 140 to 190 mm), and the tip portion is bent downward at an angle of 20 to 30 degrees to blow air on the stay material 5. It is formed so that it can be easily applied.

Therefore, if air is blown from the blowing air burner 4 to the accumulated material 5, the residual coal in the accumulated material 5 can be burned.

[0009]

[Effect of device]

 According to the air-blown air burner for a rotary kiln of the present invention, it is possible to burn the residual coal and reduce the energy consumption rate.

[Brief description of drawings]

FIG. 1 is a cutaway perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged side view of a blown air burner according to an embodiment of the present invention.

[Explanation of symbols]

 1 Rotary kiln 2 Hood at discharge end 3 Heavy oil burner 4 Air blower for this blow 5 Retained material

Claims (1)

[Scope of utility model registration request] 1. An air burner provided in a rotary kiln for charging a raw material by adding a carbonaceous material, heating it from a discharge end side with a heavy oil burner, and performing a combustion reduction reaction by the carbonaceous material, the rotary kiln discharging end. This is a rotary air blower burner for the rotary kiln, which is arranged to blow air directly to the accumulated material in the kiln near the heavy oil burner.