Apparatus and method for producing pellets using low calorific value gas

By dividing the cooling section into three sections and using mixed hot air cooling in the first section, high-temperature roasting and consolidation of pellets are achieved using low-calorific-value fuels, solving the problems of energy waste and high cost in existing technologies, and realizing efficient and low-cost pellet production.

CN116465219BActive Publication Date: 2026-04-28SINOSTEEL EQUIP & ENG
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Patent Information

Application Number
CN202310609071.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-26
Publication Date
2026-04-28
Estimated Expiration
2043-05-26

AI Technical Summary

Technical Problem

The existing belt roasting machine relies on high-calorific-value fuel gas in the production of ore pellets, which leads to energy waste and increased processing costs. Low-calorific-value fuels have insufficient combustion temperature to achieve high-temperature roasting and solidification.

Method used

The device for producing pellets using low-calorific-value fuel gas divides the cooling section into three sections. In the first cooling section, hot air from the homogenization section is introduced and mixed with ambient air for hot air cooling, thereby reducing the air-fuel ratio and achieving high-temperature roasting and solidification using low-calorific-value fuel.

Benefits of technology

It has reduced the processing cost of pellets, improved energy efficiency, reduced energy waste, and enabled the efficient application of low-calorific-value fuels in pellet production.

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Abstract

The application discloses a device for producing pellets by using low-calorific-value gas, which comprises a blast drying section, an exhaust drying section, a preheating section, a baking section, a soaking section and a cooling section which are sequentially and separately arranged, the cooling section is divided into a first cooling section, a second cooling section and a third cooling section which are sequentially arranged, the first cooling section is arranged close to the soaking section, waste gas of the soaking section is communicated with a first air bellow of the first cooling section through a first pipeline, the first air bellow is communicated with a cooling pipeline, hot air of the first cooling section flows to the baking section and the soaking section, the baking section is provided with a first low-calorific-value fuel burner, and an air-fuel ratio of the first low-calorific-value fuel burner is 4-7. The device for producing pellets by using low-calorific-value gas can realize high-temperature baking and solidification of the pellets by using low-calorific-value fuel, and the processing cost of the pellets is reduced. The application further provides a method for producing pellets by using low-calorific-value gas.
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