Closed loop control method and device for high-temperature slag flow and cooling water amount

Abstract

The invention provides a closed loop control method for high-temperature slag flow and cooling water amount. High-temperature slag flows into a middle slag trough and a slag primary cooling device, enters a slag-granulating and water-spraying system and is sprayed into the slag primary cooling device; high-temperature slag liquid drops which are granulated by the slag-granulating device contact cooling water mist and are cooled; and when the high-temperature slag flow changes, the liquid level H of the high-temperature slag in the middle slag trough changes, the detected liquid level change amount is transmitted to a closed loop system for slag amount and water amount, the control system gives a cooling water regulating amount according to the measured liquid level change and the cooling water amount through computation of a mathematic model, and controls a water amount regulating device to change the cooling water amount, so that the closed loop control for the high-temperature slag flow and the cooling water amount is realized. The invention provides a closed loop control device for the high-temperature slag flow and the cooling water amount. The closed loop control device mainly comprises a middle tank slag liquid level measuring device, the closed loop control system for the slag amount and the water amount, the middle slag trough, the slag-granulating device and the slag primary cooling device.

Description

Technical field: [0001] The invention relates to the technical field of ironmaking and automatic control, in particular to a closed-loop control method and device for high-temperature slag flow and cooling water flow Background technique: [0002] In the prior art, in order to realize the closed-loop control of the high-temperature slag flow and the cooling water flow, it is first necessary to be able to measure the instantaneous flow of the high-temperature slag and the cooling water. The measurement technology of cooling water flow is very mature and there are many methods, but there are not many measurement methods for the flow measurement of high temperature slag due to the high temperature. At present, the method that can measure the instantaneous flow of high-temperature liquids such as molten iron and molten steel is the method of measuring the cross-sectional area of ​​the launder by applying the high-frequency skin effect, which is actually a method of batch process...

AI Technical Summary

Problems solved by technology

However, these two methods are not suitable for measuring the instantaneous flow rate of high-temperature slag, and no mature method for measuring the instantaneous flow rate of high-temperature slag has been reported yet.

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