CN109800959A - A method of operation of blast furnace state is judged with index - Google Patents

Abstract

A method of operation of blast furnace state is judged with index, evaluation content includes furnace body postitallation evaluation, gas fluid distrbution evaluation, blast furnace operating evaluation, crude fuel evaluation, by every partial content according to its blast furnace effect, certain score value is given, each section content score is aggregated into total score as operation of blast furnace evaluation number；Operation of blast furnace evaluation number >=90 operational excellences；The operation of operation of blast furnace evaluation number 75~90 is substantially good；The operation fluctuation early warning of operation of blast furnace evaluation number 65~75；Operation of blast furnace evaluation number < 65 runs difference；Postitallation evaluation index content-data is calculated database from second level to acquire out, and forms operation of blast furnace evaluation number, and is alarmed unfavorable factor in terms of blast furnace.The present invention can quickly grasp the state run on the day of blast furnace by operation of blast furnace evaluation number, in time long-term trend in blast furnace, and the gradual perfection unfavorable factor in blast furnace actual motion absolutely, provide operation foundation for stable yields, efficient, low consumption, longevity.

Description

A method of operation of blast furnace state is judged with index

Technical field

The invention belongs to blast furnace operating field more particularly to a kind of methods that operation of blast furnace state is judged with index.

Background technique

In order to guarantee blast furnace long period stable smooth operation, realize that operation of blast furnace evaluation is changed from empirical to digitization, day Normal conditions of blast furnace operating status is embodied by a kind of index, and is included in daily management.

Summary of the invention

The object of the present invention is to provide a kind of methods that operation of blast furnace state is judged with index, can be with section by this method The state and there are which this unfavorable factors that ground determines that blast furnace is run at present are learned, and in daily production, is adjusted and controls, Judgment basis is provided for blast furnace manager's decision.

In order to achieve the above object, the present invention is implemented with the following technical solutions:

A method of operation of blast furnace state is judged with index, specific as follows:

1) postitallation evaluation Index Definition: evaluation content includes furnace body postitallation evaluation, gas fluid distrbution is evaluated, blast furnace operating is commented Valence, crude fuel evaluation, give every partial content to certain score value in the effect of blast furnace according to it, each section content score are converged Assembly total score is as operation of blast furnace evaluation number；

2) operation of blast furnace evaluation number judgment criteria: operation of blast furnace evaluation number >=90 are judged as operational excellence；Blast furnace fortune Row evaluation number 75~90 is judged as that operation is substantially good；Operation of blast furnace evaluation number 65~75 is judged as operation fluctuation early warning； Operation of blast furnace evaluation number < 65 is judged as that operation is poor；

3) operation of blast furnace evaluation number content is shown in Table 1- table 4, and operation of blast furnace index meets indication range, takes its score value, high Furnace operating index does not meet indication range, and score value takes zero；

Table 1: furnace body postitallation evaluation 15 is divided

Serial number	Index name	Unit	Indication range	Score value
					1	Molten iron physical thermal		3.0±0.5	2
2	Furnace core temperature	℃	330±30	5
					3	The system water temperature difference	℃	2±0.5	5
4	Copper cold wall water temperature difference	℃	4±1	3

Table 2: furnace gas flow distribution evaluates 12 points

Serial number	Index name	Unit	Indication range	Score value
					1	Stock rod is poor	mm	≤500	1
2	Top temperature	℃	≤220	2
					3	Furnace throat temperature	℃	100±20	2
4	Gas permeability		≥31	2
					5	Blast energy	5910	170±15	2
6	Coal gas hydrogen content	%	2.5±0.5	1
					7	Gas utilization rate	%	≥44	2

Table 3: blast furnace operating evaluates 13 points

Serial number	Index name	Unit	Indication range	Score value
					1	Average daily molten iron temperature	℃	≥1490	2
2	Iron qualification rate out	t	Daily output/heat ± 80	2
					3	Average daily magnalium ratio		0.5±0.1	1
4	Furnace temperature specification rate	%	≥91	2
					5	The pig iron ratio of first-grade products	%	≥91	2
6	Coke load		4.8±0.2	2
					7	Basicity of slag	It is secondary	1.18±0.03	2

Table 4: enter furnace crude fuel and evaluate 60 points

Compared with prior art, the beneficial effects of the present invention are:

A kind of method that operation of blast furnace state is judged with index of the present invention, can quickly be slapped by operation of blast furnace evaluation number The state run on the day of blast furnace is held, in time long-term trend in blast furnace absolutely, and gradual perfection is unfavorable in blast furnace actual motion Factor provides operation foundation for stable yields, efficient, low consumption, longevity.

Specific embodiment

Specific embodiments of the present invention will be further explained below:

A method of operation of blast furnace state is judged with index, specific as follows:

1) postitallation evaluation Index Definition: evaluation content includes furnace body postitallation evaluation, gas fluid distrbution is evaluated, blast furnace operating is commented Valence, crude fuel evaluation, give every partial content to certain score value in the effect of blast furnace according to it, each section content score are converged Assembly total score is as operation of blast furnace evaluation number；

2) operation of blast furnace evaluation number judgment criteria: operation of blast furnace evaluation number >=90 are judged as operational excellence；Blast furnace fortune Row evaluation number 75~90 is judged as that operation is substantially good；Operation of blast furnace evaluation number 65~75 is judged as operation fluctuation early warning； Operation of blast furnace evaluation number < 65 is judged as that operation is poor；

3) operation of blast furnace evaluation number content is shown in Table 1- table 4, and operation of blast furnace index meets indication range, takes its score value, high Furnace operating index does not meet indication range, and score value takes zero；

Table 1: furnace body postitallation evaluation 15 is divided

Serial number	Index name	Unit	Indication range	Score value
					1	Molten iron physical thermal		3.0±0.5	2
2	Furnace core temperature	℃	330±30	5
					3	The system water temperature difference	℃	2±0.5	5
4	Copper cold wall water temperature difference	℃	4±1	3

Table 2: furnace gas flow distribution evaluates 12 points

Serial number	Index name	Unit	Indication range	Score value
					1	Stock rod is poor	mm	≤500	1
2	Top temperature	℃	≤220	2
					3	Furnace throat temperature	℃	100±20	2
4	Gas permeability		≥31	2
					5	Blast energy	5910	170±15	2
6	Coal gas hydrogen content	%	2.5±0.5	1
					7	Gas utilization rate	%	≥44	2

Table 3: blast furnace operating evaluates 13 points

Table 4: enter furnace crude fuel and evaluate 60 points

Claims (1)

1. a kind of method for judging operation of blast furnace state with index, which is characterized in that specific as follows:

1) postitallation evaluation Index Definition: evaluation content include furnace body postitallation evaluation, gas fluid distrbution evaluation, blast furnace operating evaluation, Enter the evaluation of furnace crude fuel, give every partial content to certain score value in the effect of blast furnace according to it, each section content score is converged Assembly total score is as operation of blast furnace evaluation number；

2) operation of blast furnace evaluation number judgment criteria: operation of blast furnace evaluation number >=90 are judged as operational excellence；Operation of blast furnace is commented Valence index 75~90 is judged as that operation is substantially good；Operation of blast furnace evaluation number 65~75 is judged as operation fluctuation early warning；Blast furnace Postitallation evaluation index < 65 is judged as that operation is poor；

3) operation of blast furnace evaluation number content is shown in Table 1- table 4, and operation of blast furnace index meets indication range, takes its score value, blast furnace fortune Row index does not meet indication range, and score value takes zero；

Table 1: furnace body postitallation evaluation 15 is divided

Serial number Index name Unit Indication range Score value 1 Molten iron physical thermal 3.0±0.5 2 2 Furnace core temperature ℃ 330±30 5 3 The system water temperature difference ℃ 2±0.5 5 4 Copper cold wall water temperature difference ℃ 4±1 3

Table 2: furnace gas flow distribution evaluates 12 points

Serial number Index name Unit Indication range Score value 1 Stock rod is poor mm ≤500 1 2 Top temperature ℃ ≤220 2 3 Furnace throat temperature ℃ 100±20 2 4 Gas permeability ≥31 2 5 Blast energy 5910 170±15 2 6 Coal gas hydrogen content % 2.5±0.5 1 7 Gas utilization rate % ≥44 2

Table 3: blast furnace operating evaluates 13 points

Serial number Index name Unit Indication range Score value 1 Average daily molten iron temperature ℃ ≥1490 2 2 Iron qualification rate out t Daily output/heat ± 80 2 3 Average daily magnalium ratio 0.5±0.1 1 4 Furnace temperature specification rate % ≥91 2 5 The pig iron ratio of first-grade products % ≥91 2 6 Coke load 4.8±0.2 2 7 Basicity of slag It is secondary 1.18±0.03 2

Table 4: enter furnace crude fuel and evaluate 60 points