LAYOUT OF SLAB STOREROOMS AND FURNACES FOR SEPARATE CHARGING OF COLD BLANKS AND HOT BLANKS OF THICK PLATE, AND FURNACE CHARGING METHOD

Abstract

A slab library for separate storage of cold blanks and hot blanks of heavy plates and heating furnace layout, and a furnace loading method are provided. The slab library and heating furnace layout comprises: 1# slab library and 2# slab library span, i.e. feeding span, arranged side by side; continuous casting blank delivery roller way connected to the continuous casting process arranged at the inlet of the 2# slab library span; heating furnace span arranged at the outlet of the 2# slab library span, wherein more than two heating furnaces are arranged in the heating furnace span, and arranged side by side at the outlet of the 2# slab library span; slab preparatory library span, which is across the inlets of the 1# slab library span and the 2# slab library span; span-crossing traverse trolley roller way, which is across the cold blank zones of the 1# slab library span and the 2# slab library span, and the heating furnace span; span-crossing roller way, which is across the slab preparatory library span and the 1# slab library span; and, feeding roller way, arranged between the 2# slab library span and the heating furnace span, and across the hot blank zone and the cold blank zone of the 2# slab library span and the two ends of the heating furnace span, wherein the feeding roller way has a structure for delivery in two directions.

Claims

1. A slab library for separate storage of cold blanks and hot blanks of heavy plates and heating furnace layout, characterized in comprising: 1# slab library span for storing the blanks which need to be stored for a long time, or cold blanks; 2# slab library span, i.e. feeding span, arranged side by side on one side of the 1# slab library span, for stacking hot blanks which need to be temporarily stacked for a short time (i.e. hot blanks to be fed), or for storing cold blanks to be fed, wherein a continuous casting blank delivery roller way connected to the continuous casting process is arranged at the inlet of the 2# slab library span; and, the hot blank zone and the cold blank zone are respectively arranged within the 1# slab library span and the 2# slab library span; heating the furnace span arranged at the outlet of the 2# slab library span, wherein more than two heating furnaces are arranged in the heating furnace span, and arranged side by side at the outlet of the 2# slab library span, corresponding to the hot blank zone and the cold blank zone; slab preparatory library span, which is across the inlets of the 1# slab library span and the 2# slab library span, i.e. a hot blank zone, wherein the continuous casting blank delivery roller way passes through the slab preparatory library span; span-crossing traverse trolley roller way, which is across the cold blank zones of the 1# slab library span and the 2# slab library span, and the heating furnace span; span-crossing roller way, which is across the slab preparatory library span and the 1# slab library span, for delivering the blanks from the slab preparatory library span or the blanks from the continuous casting blank delivery roller way to the 1# slab library span; and feeding roller way, arranged between the 2# slab library span and the heating furnace span, and across the hot blank zone and the cold blank zone of the 2# slab library span and the two ends of the heating furnace span, wherein the feeding roller way has a structure for delivery in two directions.

2. A furnace loading method using a slab library for separate storage of cold blanks and hot blanks of heavy plates and heating furnace layout, characterized in comprising the following steps: 1) determining the ratio x of hot blanks in the blanks to be fed in a planned heating and rolling process; 2) according to the ratio of hot blanks and the number of the heating furnaces (the total number of the heating furnaces is N, the number of the selected hot blank heating furnaces is i, and the hot blank heating furnace ratio is y=i/N; setting the initial value of i as 1, and calculating the hot blank heating furnace ratio y, wherein if the value of y is greater than the ratio x, then i−1 of the heating furnaces are selected as the hot blank heating furnaces, and N−i+1 of the heating furnaces are selected as the cold blank heating furnaces; and if i<1, then the number of the hot blank heating furnace is 1, and the number of the cold blank heating furnaces is N−1; and 3) setting heating furnaces No. 1 to No. i−1 as a feeding roller zone for hot blanks, and heating furnaces No. N to No. N−i+1 as a feeding roller zone for cold blanks, feeding hot blanks from the roller way at the end of the 1.sup.st heating furnace, and feeding cold blanks from the roller way at the end of the N.sup.th heating furnace.

3. The furnace loading method according to claim 2, wherein the total number of the heating furnaces N=3, and the ratio of hot blanks is 70%, wherein the number of hot blank heating furnaces is 2, and the number of cold blank heating furnaces is 1.

4. The furnace loading method according to claim 2, wherein the total number of the heating furnaces N=4, and the ratio of hot blanks is 20%, wherein the number of hot blank heating furnaces is 1, and the number of cold blank heating furnaces is 3.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0048] These and other features, properties and advantages of the present invention will become more apparent when the following detailed description of the disclosure is read with reference to the accompanying drawings and examples, and the same reference signs in the drawings always refer to the same features, in which:

[0049] FIG. 1 is a schematic view of the slab library for separate storage for cold blanks and hot blanks of heavy plates and heating furnace layout according to the present invention.

[0050] FIG. 2 is a schematic view of the inventive example 1.

[0051] FIG. 3 is a schematic view of the inventive example 2.

[0052] FIG. 4 is a flow chart of the furnace loading method according to the present invention.

DETAILED DESCRIPTION

[0053] Now, the invention is further illustrated with reference to the examples and the accompanying drawings.

[0054] Referring to FIG. 1, the slab library for separate storage for cold blanks and hot blanks of heavy plates and heating furnace layout of the invention comprises:

[0055] 1# slab library span 1 for storing the blanks which need to be stored for a long time, or cold blanks;

[0056] 2# slab library span 2, i.e. feeding span, arranged side by side on one side of the 1# slab library span 1, for stacking hot blanks which need to be temporarily stacked for a short time (i.e. hot blanks to be fed), or for storing cold blanks to be fed, wherein a continuous casting blank delivery roller way 10 connected to the continuous casting process is arranged at the inlet of the 2# slab library span 2; and, the hot blank zone 100 and the cold blank zone 200 are respectively arranged within the 1# slab library span 1 and the 2# slab library span 2;

[0057] heating the furnace span 3 arranged at the outlet of the 2# slab library span 2, wherein more than two heating furnaces 31, 32, 33 are arranged in the heating furnace span 3, and arranged side by side at the outlet of the 2# slab library span 2, corresponding to the hot blank zone 100 and the cold blank zone 200;

[0058] slab preparatory library span 4, which is across the inlets of the 1# slab library span 1 and the 2# slab library span 2, i.e. a hot blank zone 100, wherein the continuous casting blank delivery roller way 10 passes through the slab preparatory library span 4;

[0059] span-crossing traverse trolley roller way 20, which is across the cold blank zones 200 of the 1# slab library span 1 and the 2# slab library span 2, and the heating furnace span 3;

[0060] span-crossing roller way 30, which is across the slab preparatory library span 4 and the 1# slab library span 1, for delivering the blanks from the slab preparatory library span 4 or the blanks from the continuous casting blank delivery roller 30 to the 1# slab library span 1; and feeding roller way 40, arranged between the 2# slab library span 2 and the heating furnace span 3, and across the hot blank zone 100 and the cold blank zone 200 of the 2# slab library span 2 and the two ends of the heating furnace span 3, wherein the feeding roller way 40 has a structure for delivery in two directions.

[0061] Referring to FIG. 4, the furnace loading method using the slab library for separate storage of cold blanks and hot blanks of heavy plates and furnace layout according to the present invention comprises the following steps:

[0062] 1) determining the ratio x of hot blanks in the blanks to be fed in a planned heating and rolling process;

[0063] 2) according to the ratio of hot blanks and the number of the heating furnaces (the total number of the heating furnaces is N, the number of the selected hot blank heating furnaces is i, and the hot blank heating furnace ratio is y=i/N; setting the initial value of i as 1, and calculating the hot blank heating furnace ratio y, wherein if the value of y is greater than the ratio x, then i−1 of the heating furnaces are selected as the hot blank heating furnaces, and N−i+1 of the heating furnaces are selected as the cold blank heating furnaces; and if i<1, then the number of the hot blank heating furnace is 1, and the number of the cold blank heating furnaces is N−1; and

[0064] 3) setting heating furnaces No. 1 to No. i−1 as a feeding roller zone for hot blanks, and heating furnaces No. N to No. N−i+1 as a feeding roller zone for cold blanks, feeding hot blanks from the roller way at the end of the 1.sup.st heating furnace, and feeding cold blanks from the roller way at the end of the N.sup.th heating furnace.

Example 1

[0065] Referring to FIG. 2, the total number of the heating furnaces N=3, and the ratio of hot blanks is 70%, wherein the number of hot blank heating furnaces is 2 (i.e. the heating furnaces 31, 32), and the number of cold blank heating furnaces is 1 (i.e. the heating furnace 33).

Example 2

[0066] Referring to FIG. 3, the total number of the heating furnaces N=4, and the ratio of hot blanks is 20%, wherein the number of hot blank heating furnaces is 1 (i.e. the heating furnace 31), and the number of cold blank heating furnaces is 3 (i.e. the heating furnaces 32, 33, 34).

[0067] Although the specific embodiments of the present invention have been described, those skilled in the art will understand that these are just illustrative, and the protection scope of the present invention is defined by the accompanying claims. Various changes or modifications to the invention can be made by those skilled in the art after reading the above teachings of the invention, and these equivalent variations fall in the scope defined by the accompanying claims of the application as well.