Novel molten iron efficient transportation method

Abstract

The invention provides a novel molten iron efficient transportation method. A blast furnace shunting yard is arranged between a blast furnace area and a steelmaking workshop; each blast furnace is provided with a corresponding iron adjusting locomotive; the iron adjusting locomotives are used for conveying the torpedo tanks filled with the molten iron between a blast furnace area and a blast furnace shunting yard in a single-tank iron adjusting mode; every time when one torpedo tank below a blast furnace tap hole is filled with the molten iron, the torpedo tanks filled with the molten iron are conveyed to the blast furnace shunting yard for waiting through the corresponding iron adjusting locomotives; a steelmaking tank conveying locomotive is arranged between a blast furnace shunting yard and a steelmaking workshop, and the steelmaking tank conveying locomotive is used for conveying torpedo tanks full of molten iron in a relay iron conveying mode; and the required torpedo ladle filled with the molten iron is conveyed to a steelmaking workshop through a steelmaking ladle conveying locomotive. The problems that a traditional torpedo tank transportation mode is long in waiting time, low in transportation efficiency and large in energy loss are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace smelting, and more particularly to a novel method for efficiently transporting hot metal. Background Art

[0002] In blast furnace production, torpedo ladles are generally transported by rail. Taking two 3200m 3 blast furnaces in the western area of the main plant of Angang Steel as an example, in the traditional transportation mode, that is, according to three torpedo ladles for each blast furnace and a 2:2 mode for each shift of ladles, each railway locomotive is responsible for a cycle process of ladle allocation (emptying), tapping, alignment, weight adjustment, weighing, transporting the hot metal to the steelmaking workshop, taking the empty ladle and then allocating the empty ladle again. Six locomotives and 24 torpedo ladles are required for the two blast furnaces to ensure production; in the operation process of the traditional transportation mode, whether in the blast furnace area or in the converter area, there are problems of long waiting time, low transportation efficiency, and high energy loss, resulting in large temperature drop of the hot metal, high manpower and material resources input for transportation, and relatively high transportation cost. Summary of the Invention

[0003] In view of the above-mentioned technical problems of long waiting time, low transportation efficiency, and high energy loss existing in the traditional torpedo ladle transportation mode, a novel method for efficiently transporting hot metal is provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A novel method for efficiently transporting hot metal, which adopts a single-ladle hot metal transfer + relay hot metal transportation mode for hot metal transportation, specifically including:

[0006] A blast furnace shunting yard is arranged between the blast furnace area and the steelmaking workshop;

[0007] Each blast furnace in the blast furnace area is provided with a torpedo ladle for loading hot metal at the tapping hole, and a corresponding hot metal transfer locomotive is provided;

[0008] The hot metal transfer locomotive is used to transport the torpedo ladle filled with hot metal between the blast furnace area and the blast furnace shunting yard in a single-ladle hot metal transfer mode: whenever a torpedo ladle under the tapping hole of the blast furnace is filled with hot metal, the filled torpedo ladle is transported to the blast furnace shunting yard by the corresponding hot metal transfer locomotive and waits;

[0009] A steelmaking ladle delivery locomotive is arranged between the blast furnace shunting yard and the steelmaking workshop, and the steelmaking ladle delivery locomotive is used to transport the torpedo ladle filled with hot metal in a relay hot metal transportation mode: whenever the number of torpedo ladles filled with hot metal waiting in the blast furnace shunting yard meets the preset requirements, the required torpedo ladles filled with hot metal are transported to the steelmaking workshop together by the steelmaking ladle delivery locomotive.

[0010] Further, after the steelmaking ladle car transports the torpedo ladle full of hot metal to the steelmaking workshop, it is also used to transport the empty torpedo ladles in the steelmaking workshop to the blast furnace shunting yard.

[0011] After the hot metal transfer car transports the torpedo ladle full of hot metal to the blast furnace shunting yard, it is also used to transport the empty torpedo ladles in the blast furnace shunting yard to the tapping spout of the corresponding blast furnace according to the needs of the blast furnace.

[0012] Further, at least two torpedo ladles are provided at the tapping spout of each blast furnace.

[0013] Further, whenever the number of torpedo ladles full of hot metal waiting in the blast furnace shunting yard is equal to the number of torpedo ladles full of hot metal required by the steelmaking workshop, the required torpedo ladles full of hot metal are transported to the steelmaking workshop together by the steelmaking ladle car.

[0014] Further, whenever there are two torpedo ladles full of hot metal waiting in the blast furnace shunting yard, two torpedo ladles full of hot metal are transported to the steelmaking workshop together by the steelmaking ladle car.

[0015] Further, during the transportation of the hot metal transfer car and the steelmaking ladle car, the casting and transportation personnel monitor the status of the torpedo ladle according to the requirements of railway operation guidance.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The novel high-efficiency hot metal transportation method provided by the present invention can improve the turnover efficiency and service life of torpedo ladles, reduce the proportion of crust and nodule formation in torpedo ladles, save gas consumption during ladle baking, reduce the loss of hot metal temperature drop, increase the scrap ratio of converters, reduce the energy consumption of converters, improve the transportation efficiency, reduce the number of locomotives used, and reduce the transportation labor cost.

[0018] Based on the above reasons, the present invention can be widely promoted in the field of blast furnace smelting. Detailed Embodiments

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] The present invention provides a novel high-efficiency hot metal transportation method, which adopts the mode of single-ladle hot metal transfer + relay hot metal delivery for hot metal transportation, specifically including:

[0021] A blast furnace shunting yard is set up between the blast furnace area and the steelmaking workshop;

[0022] For each blast furnace in the blast furnace area, a torpedo ladle for loading molten iron is set at the tapping hole, and a corresponding iron transfer locomotive is provided;

[0023] The iron transfer locomotive is used to transport the torpedo ladle full of molten iron between the blast furnace area and the blast furnace shunting yard in the mode of single-ladle iron transfer: whenever a torpedo ladle under the tapping hole of the blast furnace is full of molten iron, the iron transfer locomotive will transport the torpedo ladle full of molten iron to the blast furnace shunting yard to wait;

[0024] A steelmaking ladle delivery locomotive is set up between the blast furnace shunting yard and the steelmaking workshop. The steelmaking ladle delivery locomotive is used to transport the torpedo ladle full of molten iron in the mode of relay iron delivery: whenever the number of torpedo ladles full of molten iron waiting in the blast furnace shunting yard meets the preset requirements, the steelmaking ladle delivery locomotive will transport the required torpedo ladles full of molten iron to the steelmaking workshop together.

[0025] Furthermore, after the steelmaking ladle delivery locomotive transports the torpedo ladle full of molten iron to the steelmaking workshop, it is also used to transport the empty torpedo ladles in the steelmaking workshop to the blast furnace shunting yard;

[0026] After the iron transfer locomotive transports the torpedo ladle full of molten iron to the blast furnace shunting yard, it is also used to transport the empty torpedo ladles in the blast furnace shunting yard to the tapping hole of the corresponding blast furnace according to the needs of the blast furnace.

[0027] Furthermore, at least two torpedo ladles are set at the tapping hole of each blast furnace.

[0028] Furthermore, whenever the number of torpedo ladles full of molten iron waiting in the blast furnace shunting yard is equal to the number of torpedo ladles full of molten iron required by the steelmaking workshop, the steelmaking ladle delivery locomotive will transport the required torpedo ladles full of molten iron to the steelmaking workshop together.

[0029] Preferably, whenever there are two torpedo ladles full of molten iron waiting in the blast furnace shunting yard, the steelmaking ladle delivery locomotive will transport the two torpedo ladles full of molten iron to the steelmaking workshop together.

[0030] Furthermore, during the transportation of the iron transfer locomotive and the steelmaking ladle delivery locomotive, the casting and transportation personnel will track and monitor the status of the torpedo ladle according to the requirements of railway operation guidance until the iron pouring is completed.

[0031] The novel high-efficiency hot metal transportation method described in the present invention proposes a new transportation mode of single ladle iron adjustment + relay hot metal delivery, which divides the functions of locomotives. One part of the locomotives is responsible for transporting torpedo ladles between the blast furnace and the blast furnace shunting yard, and the other part of the locomotives is responsible for transporting torpedo ladles between the blast furnace shunting yard and the steelmaking workshop. Thus, the number of locomotives used is reduced, the manual transportation cost is lowered, and the turnover rate of torpedo ladles is increased through extreme operation. Furthermore, the temperature drop of the hot metal in the torpedo ladle caused by the waiting time of the torpedo ladle in the blast furnace area or the converter area is reduced, the service life of the torpedo ladle is increased, the proportion of crust and nodule formation in the torpedo ladle is reduced, and the gas consumption during ladle baking is saved.

[0032] Example 1

[0033] In this embodiment, taking two 3200m 3 blast furnaces in the west area of the main plant of Angang Steel as an example, adopting the traditional transportation mode, that is, implementing ladle allocation according to three torpedo ladles per blast furnace and a 2:2 mode for each turn. Each railway locomotive is responsible for a cycle process of ladle allocation from empty ladle, tapping, alignment, weight adjustment of the ladle, weighing, delivering the hot metal to the steelmaking workshop, taking the empty ladle and then ladle allocation again. To ensure production, 6 locomotives and 24 torpedo ladles are required for the two blast furnaces;

[0034] While adopting the novel high-efficiency hot metal transportation method described in the present invention:

[0035] Two torpedo ladles are set at the tapping hole of each blast furnace, and a corresponding iron adjustment locomotive is set;

[0036] A blast furnace shunting yard is set between the blast furnace area and the steelmaking workshop;

[0037] When a torpedo ladle under the first blast furnace is filled with hot metal, the filled torpedo ladle is transported to the blast furnace shunting yard by the corresponding iron adjustment locomotive to wait. If the first blast furnace still needs an empty torpedo ladle, the empty torpedo ladle in the blast furnace shunting yard is transported to the tapping hole of the corresponding blast furnace by the corresponding iron adjustment locomotive;

[0038] When a torpedo ladle under the second blast furnace is filled with hot metal, the filled torpedo ladle is transported to the blast furnace shunting yard by the corresponding iron adjustment locomotive to wait. If the second blast furnace still needs an empty torpedo ladle, the empty torpedo ladle in the blast furnace shunting yard is transported to the tapping hole of the corresponding blast furnace by the corresponding iron adjustment locomotive;

[0039] The steelmaking workshop requires two torpedo ladles filled with hot metal at a time. When the number of torpedo ladles filled with hot metal waiting in the blast furnace shunting yard reaches two, two torpedo ladles filled with hot metal are transported to the steelmaking workshop together by the steelmaking ladle delivery locomotive, and the empty torpedo ladles in the steelmaking workshop are transported to the blast furnace shunting yard;

[0040] By adopting the method provided by the present invention, only 2 iron transfer locomotives, 2 steelmaking ladle cars and 16 - 18 torpedo ladles are needed for two blast furnaces to ensure production. The turnover rate of torpedo ladles can be increased by more than 30%, the temperature drop of molten iron can be reduced by 8 - 10 °C, and at the same time, 2 locomotives can be saved, and the shift drivers and crew can be reduced by one - third. Taking the daily output of two blast furnaces as 16,000 tons, the benefit per degree of the cost per ton of iron is 0.5 yuan, and calculating with the new high - efficiency molten iron transportation method reducing the temperature drop of molten iron by 10 degrees, the benefit = 16000 * 10 * 0.5 * 365 = 29.2 million yuan / year.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel method for efficient transportation of hot metal, characterized in that, The molten iron transportation is carried out in the mode of single ladle iron adjustment + relay iron delivery, specifically including: A blast furnace shunting yard is set between the blast furnace area and the steelmaking workshop; Each blast furnace in the blast furnace area is provided with a torpedo ladle for loading molten iron at the tapping hole, and a corresponding iron adjusting locomotive is set; The iron adjusting locomotive is used to transport the torpedo ladle full of molten iron between the blast furnace area and the blast furnace shunting yard in the mode of single ladle iron adjustment: Whenever a torpedo ladle under the tapping hole of the blast furnace is full of molten iron, the iron adjusting locomotive will transport the torpedo ladle full of molten iron to the blast furnace shunting yard to wait; A steelmaking ladle delivery locomotive is set between the blast furnace shunting yard and the steelmaking workshop. The steelmaking ladle delivery locomotive is used to transport the torpedo ladle full of molten iron in the mode of relay iron delivery: Whenever the number of torpedo ladles full of molten iron waiting in the blast furnace shunting yard meets the preset requirements, the steelmaking ladle delivery locomotive will transport the required torpedo ladles full of molten iron to the steelmaking workshop together.

2. The novel high-efficiency hot metal transportation method according to claim 1, wherein After the steelmaking ladle delivery locomotive transports the torpedo ladle full of molten iron to the steelmaking workshop, it is also used to transport the empty torpedo ladles in the steelmaking workshop to the blast furnace shunting yard; After the iron adjusting locomotive transports the torpedo ladle full of molten iron to the blast furnace shunting yard, it is also used to transport the empty torpedo ladles in the blast furnace shunting yard to the tapping hole of the corresponding blast furnace according to the needs of the blast furnace.

3. The novel high-efficiency hot metal transportation method according to claim 1, characterized in that Each blast furnace is provided with at least two torpedo ladles at the tapping hole.

4. The novel method for efficient hot metal transportation according to claim 1, characterized in that, Whenever the number of torpedo ladles full of molten iron waiting in the blast furnace shunting yard is equal to the number of torpedo ladles full of molten iron required by the steelmaking workshop, the steelmaking ladle delivery locomotive will transport the required torpedo ladles full of molten iron to the steelmaking workshop together.

5. The novel high-efficiency hot metal transportation method according to claim 1, characterized in that Whenever there are two torpedo ladles full of molten iron waiting in the blast furnace shunting yard, the steelmaking ladle delivery locomotive will transport the two torpedo ladles full of molten iron to the steelmaking workshop together.

6. The novel high-efficiency hot metal transportation method according to claim 1, characterized in that, During the transportation of the iron adjusting locomotive and the steelmaking ladle delivery locomotive, the casting and transportation personnel track and monitor the status of the torpedo ladle according to the requirements of railway operation guidance.