Direct reduction shaft furnace with probe for interior gas analysis

Abstract

A direct reduction shaft furnace having at least one probe disposed vertically within the reduction zone thereof. The probe preferably extends from the top to the bottom of the reduction zone. The probe allows for gas sampling along the length thereof and transmittal of the gas to at least one type of gas analysis device. The probe may also allow for the measurement of the temperature and pressure of the gas sample as it is taken.

Description

technical field [0001] The invention generally relates to any type of shaft furnace including direct reduction shaft furnaces. More specifically, the present invention relates to internal sensors for direct reduction shaft furnaces. In particular, the invention relates to a direct reduction shaft furnace having at least one probe to measure temperature and collect gas samples at different levels within its reduction zone. Background technique [0002] The direct reduction method used to produce high-quality metallized pellets has an extremely high degree of thermal efficiency. Direct reduced iron (DRI) is produced by the direct reduction of iron ore (in the form of lumps, pellets or fines) to iron by means of reducing gases. Hematite / magnetite is suitable for direct reduction. [0003] Reduced iron gets its name from the chemical changes that iron ore undergoes when it is heated in a furnace at high temperatures in the presence of hydrocarbon-rich gases, carbon monoxide, ...

AI Technical Summary

Problems solved by technology

Therefore, since there are currently no in situ measurements of gas analysis inside the shaft furnace, technicians can only model the DR reduction zone based on its inputs and outputs (gas and solids)

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