Automatic control system for silicothermic process semicontinuous magnesium smelting furnace burden calcination

An automatic control system, semi-continuous technology, applied in the field of automatic control system for calcination of furnace materials for thermal magnesium smelting, can solve the problems of controlling temperature output value, inability to calculate deviations, etc.

Inactive Publication Date: 2014-11-12
NINGXIA JIAXIANG AUTOMATIC CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the automatic control system of the calcination temperature and calcination time of the rotary kiln adopts a conventional control system using a conventional analog regulator, which cannot accurately calculate the deviation and control the temperature output value.

Method used

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  • Automatic control system for silicothermic process semicontinuous magnesium smelting furnace burden calcination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: Using the working principle of the closed-loop control system :

[0010] When there is a deviation in the calcination process for some reason, the controllers such as computer 1, converter 2, and holder 3 will calculate the deviation according to the set control temperature, and then output a control value △u to the actuator 4 to reduce the deviation , until the control requirements are met, at this time the controller output u will remain at a certain value and will not change.

Embodiment 2

[0011] Embodiment 2 adopts the purpose of automatic control:

[0012] The purpose of automatic control is to keep the system stable when the temperature setting value of each section of the rotary kiln changes or is disturbed by the outside world. A well-controlled system should be stable, rapid and accurate after the system is disturbed. To approach and return to the set value, evaluate the quality indicators of the system, and have the characteristic parameters of the step response curve (attenuation ratio overshoot, recovery time, residual error) and deviation integral performance indicators, etc.

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PUM

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Abstract

The invention relates to an automatic control system for silicothermic process semicontinuous magnesium smelting furnace burden calcination. The automatic control system can precisely calculate the deviation and control the temperature output value. The automatic control system comprises a computer (1), a D/A converter (2), a retaining appliance (3), an execution mechanism (4), an A/D converter (5), a sampling apparatus (6) and a transmission signal measuring mechanism (7). The automatic control system is characterized in that closed-loop control is adopted in the automatic control system. The automatic control system has the advantages of avoiding the conditions that a past open-loop control system is generally poor in control performance, the activity degree cannot be adjusted, and the calcination temperature and time cannot be tracked, and achieving action system stability.

Description

technical field [0001] The invention relates to an automatic control system for calcination of charge for silicothermal semi-continuous magnesium smelting, in particular to an automatic control system for calcination of charge for thermal magnesium smelting. Background technique [0002] The prominent problems of thermal magnesium smelting are high fuel consumption, high cost and low output. For many years, domestic magnesium metal factories have been troubled. Although the quality of calcined white has been guaranteed in rotary kiln calcination, the activity of calcined white has not been improved. Generally, it hovers at 28%, which is far lower than the level of 85% abroad. Dolomite calcination has different properties depending on its combustion conditions. The reactivity of dolomite is determined by the calcination temperature and calcination time. Therefore, solving the tracking of the rotary kiln calcination temperature and calcination time is to improve The fundamen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/22C22B1/02
Inventor 郭志年
Owner NINGXIA JIAXIANG AUTOMATIC CONTROL TECH
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