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Combustor for magnetizing roasting rotary kiln

A technology of magnetization roasting and rotary kiln, which is applied in the direction of burners, burners, and combustion methods for burning powder fuels, and can solve problems such as inability to react, side reactions, low temperature, and slow reaction speed

Pending Publication Date: 2021-08-31
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature range required for the magnetization roasting of weakly magnetic iron ore and the reduction roasting of pyrolusite and other ore phase transformation processes is only a relatively low temperature of 650°C to 850°C. If the temperature is too high, it will easily cause side reactions and environmental pollution problems. Low response speed is too slow or even unable to react

Method used

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  • Combustor for magnetizing roasting rotary kiln
  • Combustor for magnetizing roasting rotary kiln
  • Combustor for magnetizing roasting rotary kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] like Figure 1-3As shown, the present invention discloses a burner for a magnetized roasting rotary kiln, which includes a coarse-grained coal powder supply channel 2, a coarse-grained coal powder conveying air channel 1, a primary combustion-supporting air supply channel 3, a fine-grained coal powder The supply channel 4 and the fine-grained pulverized coal conveying air channel 5 are both formed by circular pipe fittings and arranged in sockets, and the socketed pipes are separated by high-temperature-resistant steel and arranged coaxially. The outlets of the coarse pulverized coal conveying air channel 1 , the primary combustion air supply channel 3 and the fine pulverized coal supply channel 4 are arranged in alignment. The primary combustion-supporting air supply channel 3 is socketed on the outside of the coarse-grained coal powder supply channel 2, and the gap of the fine-grained coal powder supply channel 4 is socketed on the outside of the primary combustion-su...

Embodiment 2

[0055] like Figure 4-5 As shown, the present invention discloses a burner for magnetization roasting rotary kiln, its main structure is similar to that of Embodiment 1, the difference is that it also includes a secondary combustion-supporting air supply channel 6, wherein the secondary combustion-supporting air supply The coaxial gap of the inlet channel 6 is sleeved on the outside of the fine-grained coal powder supply channel 4, and its output port is connected with the coarse-grained coal powder supply channel 2, the primary combustion-supporting air supply channel 3 and the fine-grained coal powder supply channel 4 The output ports are aligned. Thereby, the coarse-grained coal powder in the coarse-grained coal powder supply channel 2 is fed into the reaction furnace at a high speed through the ejection action of the coarse-grained coal powder conveying air channel 1, and the output end of the fine-grained coal powder transporting air channel 5 is inserted into the reactio...

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Abstract

The invention discloses a combustor for a magnetizing roasting rotary kiln. The combustor comprises a coarse-grain pulverized coal feeding channel, a coarse-grain pulverized coal conveying air channel, a primary combustion-supporting air feeding channel, a fine-grain pulverized coal feeding channel and a fine-grain pulverized coal conveying air channel, and is characterized in that the primary combustion-supporting air feeding channel sleeves the coarse-grain pulverized coal feeding channel in a clearance manner, the fine-grain pulverized coal feeding channel sleeve the primary combustion-supporting air feeding channel in a clearance mode, the output end of the coarse-grain pulverized coal conveying air channel is arranged in the conveying direction of coarse-grain pulverized coal, and the output end of the fine-grain pulverized coal conveying air channel is arranged in the conveying direction of fine-grain pulverized coal. A reasonable temperature field can be formed, meanwhile, the temperature field is more flexible and convenient to regulate and control, the problems that the local temperature is too high, and more thermal NOx gas is produced can be further solved, and the combustion and reduction processes are more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and mineral processing equipment, and in particular relates to a burner used for magnetization roasting rotary kiln. Background technique [0002] As the key equipment in the high-temperature mineral phase transformation process of ferrous metals, the performance of the burner directly affects the fuel consumption in the roasting process, the quality of roasted products, production output and the service life of refractory materials. The design concept of the burner used in conventional metallurgical equipment is to strengthen the reflow of high-temperature gas by adjusting the equipment structure and the ratio of primary air and secondary air, so as to obtain a relatively reasonable flame temperature distribution and flame length in the reactor. [0003] However, in the process of pursuing a high fuel burnout rate, the concentration distribution of the reducing gas in the radial direction in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B7/34F23D1/00F23L9/00
CPCF23D1/00F23L9/00F27B7/34
Inventor 陈雯刘小银李家林彭泽友陆晓苏
Owner CHANGSHA RES INST OF MINING & METALLURGY
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