Blast furnace hearth water temperature difference alarming control method

A control method and technology of water temperature difference, applied to blast furnaces, blast furnace details, blast furnace components, etc., can solve problems such as lagging of measures, achieve the effects of reducing impact, prolonging the life of one generation, and modifying the area and length of air intake

Inactive Publication Date: 2008-09-17
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

Mainly solve the technical problem of lagging measures caused by fixed alarm points

Method used

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  • Blast furnace hearth water temperature difference alarming control method

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Embodiment Construction

[0007] Referring to the accompanying drawings, a gradient alarm program is added to the operation software of the blast furnace hearth automatic monitoring system, so that the system can reach the set water temperature difference and heat flow intensity value of the hearth stave within the set time range, divided into Two-level alarm, the first level is a yellow alarm, that is, the water temperature difference rises by 0.4°C within 4 hours, and the heat flow intensity rises by 2000kcal / m (normally below 1.0°C) 2 .h, (normally at 8000kcal / m 2 .h or less) the second level is a red alarm, that is, the water temperature difference rises by 0.6°C and the heat flow intensity rises by 4000kcal / m within 4 hours 2 .h, in actual application, through the two-level gradient alarm, effective measures such as shutting off the wind and cooling the furnace, lengthening the tuyere and blocking the tuyere were adopted to avoid greater losses. Practice has proved that the gradient alarm system ...

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Abstract

The invention relates to water temperature monitoring method of crucible of blast furnace, in particular relates to a control method of water temperature difference alarm of crucible of blast furnace. Technical problems that fixed alarming points causes measurement lag are solved. The technical solution of the invention is: a control method of water temperature difference alarm of crucible of blast furnace comprises the step of regular alarming step after data collection, that is, alarming when the water temperature difference is 1.2 deg. C and heat current intensity is 10000kcal/m.sq./h, further characterized in that comprising the step of grads alarm, composed of a first level alarming step and a second level alarming step; the first level alarming step is: alarming when the water temperature difference ascends 0.4 deg. C in hour hours and heat current intensity is 4000kcal/m.sq./h; the second level alarming step is: alarming when the water temperature difference ascends 0.6 deg. C in hour hours and heat current intensity is 4000kcal/m.sq./h. The invention is mainly applied to monitoring erosion of furnace body.

Description

Technical field: [0001] The invention relates to a method for monitoring water temperature in a blast furnace hearth, in particular to a control method for alarming the water temperature difference in a blast furnace hearth. Background technique: [0002] When the blast furnace has been in service for a certain number of years, the long-term high-intensity smelting will overwhelm the work of the hearth, the erosion will become more and more serious, the ceramic cup in the hearth of the blast furnace will gradually become thinner, the temperature difference of the hearth water will often rise, and the measurement methods are all used Manual operation is not only labor-intensive when measuring. The accuracy of its measurement is also limited, and it cannot accurately reflect the actual situation of the hearth water temperature difference and heat flow intensity. With the prolongation of the furnace age, relying on manual operation can no longer meet the actual needs of blast ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K3/08G01K3/10G01K1/14C21B7/00G01K1/02
Inventor 蔡善咏赵宪林
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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