CN103014200B

CN103014200B - Process applicable to transfer of molten steel slag of converter and optimization of treatment of hot smouldering slag

Info

Publication number: CN103014200B
Application number: CN201210083728.6A
Authority: CN
Inventors: 王瑞利; 俞海明; 梁军; 刘鲁新; 解英明; 张建华; 段建勇; 王清松; 兰飞鹏; 姜新平
Original assignee: Xinjiang Bayi Iron and Steel Co Ltd
Current assignee: Xinjiang Bayi Iron and Steel Co Ltd
Priority date: 2012-03-27
Filing date: 2012-03-27
Publication date: 2014-05-28
Anticipated expiration: 2032-03-27
Also published as: CN103014200A

Abstract

The invention provides a process applicable to transfer of molten steel slag of a converter and optimization of treatment of hot smouldering slag. According to the process, a slag film of 20 to 80mm, which is formed by bringing the high-temperature molten slag tank of the converter into contact with the inner wall of the slag tank of a steel casting and then rapidly cooling, is adopted as the refractory material of a lining; the slag surface of the slag tank containing the motel steel slag of the converter is processed for 0.5 to 2 hours by spraying atomized water, so as to form a slag housing of 100 to 150mm on the slag surface, thus the loss of thermal radiation can be reduced once the steel slag is contained again, the molten slag can be prevented from being splashed during transportation, and a condition for treating the hot smouldering slag at a temperature over 800 DEG C is provided; an infrared temperature measuring gun is adopted and used for measuring the temperature of the slag tank, and the tank can be drawn when a housing of the slag tank is at a temperature below 425 DEG C and the slag housing of the upper part is at temperature below 625 DEG C, and as a result, the safety in production can be ensured.

Description

A kind of transhipment and the technique of optimizing hot vexed slag processing that is applicable to converter liquid steel slag

technical field

The present invention relates to the transhipment protection of converter liquid steel slag, especially can meet the temperature range of hot vexed residues processing technique demand, guarantee the security of slag ladle transhipment simultaneously in conjunction with Data Detection, this detection method is easy to be practical again.

Background technology

Hot vexed slag technique becomes one of first-selected technique of many steel mills at present, and the optimum temps of the vexed slag of heat needing is 300～800 ℃, and owing to being novel process, the vexed slag of the heat treatment zone of many steel mills was all just built in recent years, all away from converter steelmaking factory; Conventionally bessemer furnace slag need to pack in the slag ladle take cast steel as material, then using train or automobile long-distance to be transported to hot vexed slag slag field processes, the danger of wherein transporting solid steel slag is less, the danger of transhipment liquid steel slag is larger, from several respects: the 1) roping of canned liquid steel slag, slag splashes can initiation fire; 2) part slag temperature is higher than 1600 ℃, and cavity appears in slag ladle fusing, wears the fire of tank initiation vehicle; 3) in slag ladle, be greater than slag with molten steel proportion, be deposited on bottom, cause Lou slag bleed-out accident; 4) adopt the cooling means of the steel mill of hot vexed slag technique all to adopt naturally cooling 6～8h, it is large that place takies, and the quantity of transhipment slag ladle is many, and cost drops into larger.

Disclose according to literature search: (1) Weiping YIN is published in " steel research " 2010(2): 24; " Application and Development of the stewing technology of bessemer furnace slag heat " paper; (2) handsome prosperous woods is published in " steel research " 2003(3): " the safety and Protection mining technique of slag basin transport vehicle " paper of 68; (3) Yan Bingfu, Zhuan Guanhua, Yan Li are published in " steel research " 2002(2): " manufacture Chinese Foundry equipment and the technology of large-scale steel-casting slag ladle " paper of 48; Above-mentioned information all solution not yet in effect is drawn safety precaution problem in tank process and the roping problem of high efficiency.

The present invention is directed to the elementary operation rule of liquid steel slag roping, the result of calculating take thermodynamical equilibrium equation is foundation, in conjunction with the thermodynamic condition of metallurgical process, develop the novel process of highly effective and safe transhipment converter liquid steel slag, after having realized converter liquid steel slag and being transported to hot vexed slag slag field, the technological temperature scope of slag temperature in the vexed processing of optimal heat is with interior technique object.

Summary of the invention

The object of the invention is to: the transhipment and the technique of optimizing hot vexed slag processing that are applicable to converter liquid steel slag are provided, solve the safety problem of remote safe roping converter liquid steel slag, created bessemer furnace slag arrival Re Men slag factory has 800 ℃ of above temperature condition later, realizes bessemer furnace slag and within the shortest time, realizes entrucking roping.

The object of the present invention is achieved like this: a kind of transhipment and the technique of optimizing hot vexed slag processing that is applicable to converter liquid steel slag, utilize in the liquid high temperature sludge liquid splendid attire slag ladle of converter and contact with the slag ladle inwall of steel casting, the slag film of 20～80mm forming sharply cools, use as inner lining refractory, the liquid steel slag of splendid attire converter, prevent the tank accident of wearing that converter high-temperature steel slag causes, and for the top top of the slag that is loaded with converter liquid steel slag slag ladle, use atomized water spray operation 0.5-2h, impel slag surface to form the skull of 100-150mm, again when splendid attire slag, can reduce thermal radiation loss, can effectively prevent in roping process the slag liquid all kinds of accidents that cause of splashing simultaneously, and in roping process, jolting of vehicle, the accident that slag ladle causes is overflowed in vibrations, the more than 800 ℃ hot vexed slag condition of creation, adopt infrared temperature measurement gun again, slag ladle is carried out to thermometric, in slag ladle skin temperature, lower than 425 ℃, the temperature of top skull, lower than 625 ℃, can be implemented to draw tank operation, guarantees safe production.

Described technique, the model of hand-held infrared temperature measurement gun is RAYTEK, by Futian Area of Shenzhen City, Guangdong Province, Lei Tai company produces.

Technique of the present invention had both solved the transhipment safety problem of converter liquid steel slag, kept again hot vexed slag ideal temperature before treatment, was really to kill two birds with one stone; The method is simple, and security is secure, can effectively improve operating rate, for the technique adjustment of slag factory and the continuity of production provide guarantee, shows technical progress.

Embodiment

With 3 120 tons of converter smeltings, use 11m ³slag ladle roping be example to the operation of the vexed slag slag of the heat field apart from beyond steelworks 8km: its operation steps is as follows:

1) adopt handheld portable infrared temperature measurement gun for subsequent use as temperature measurement tool, its range is at 10 ℃～900 ℃;

2) on the vacant lot of slag field, put second new slag ladle stand-by, first new slag ladle connects slag operation to converter;

3) slag ladle of first splendid attire converter liquid slag liquid, connect slag operation uses driving to carry out deslagging operation to second new slag ladle later, the slag liquid that is about to the first tank is poured second new slag ladle into, be finished down first slag ladle of slag liquid, leave the slag film of inwall, use this converter with next stove of slag ladle splendid attire of slag film to slag tap slag that operation pours out, treats the converter end of slagging tap, and slag ladle is transferred to slag ladle placed point and leaves standstill and process 20min;

4) splendid attire first slag ladle pour out second slag ladle of slag liquid, due to the cooling in tank switching process, second slag ladle inwall also can form the slag film of one deck 60mm, therefore the inwall of second slag ladle also has safety control, second slag ladle also winched to slag ladle placed point and leave standstill 20min;

5) after treating that slag ladle surface is without boiling phenomenon and slag splash phenomena, working pressure is less than the atomized water of 50pa, sprays and beats water-cooled Constraint Cooling Technology to the top of the slag of having filled above slag melt cinder tank;

6) the higher heat of spraying cooling 2h(slag temperature, the time of spraying cooling is longer accordingly; The slag that the heat that slag temperature is lower and slag splashing are poured out later, cooling time is shorter accordingly), then stop spraying cooling, the flow of spray water has strong steam to overflow with the top of the slag to be as the criterion always, and the water consumption of ton slag is controlled at 0.8t, until top of the slag surface during without ponding, the temperature of measuring its skull surface is less than 650 ℃, the temperature of slag ladle outer wall, lower than 425 ℃, waits for that the lip-deep water evaporation of slag film is clean, by slag ladle entrucking roping.

Beneficial effect of the present invention:

(1) be 7h the minimum cooling time of a traditional slag ladle of naturally cooling technique, and this technique only needs 1.0h, saves h cooling times 6 of cooling slag ladle, and operating efficiency increases substantially.

(2) converter of 3 120 tons of traditional technologys, needs 60 slag ladles can meet the needs of steel slag hot disintegrating, adopts this technique, drops into 30 slag ladles and can meet the demand of production run, according to each 11m ³250,000 yuan of calculating of slag ladle cost, save slag ladle input cost 50%.

Claims

1. one kind is applicable to the transhipment and the technique of optimizing hot vexed slag processing of converter liquid steel slag, it is characterized in that: utilize in the liquid high temperature sludge liquid splendid attire slag ladle of converter and contact with the slag ladle inwall of steel casting, the slag film of 20～80mm forming that sharply cools, uses as inner lining refractory; And for the top of the slag that is loaded with converter liquid steel slag slag ladle, use atomized water spray operation 0.5-2h, impel the top of the slag to form the skull of 100-150mm, again when splendid attire slag, can reduce thermal radiation loss, prevent that the slag liquid of roping from splashing, create the treatment condition of more than 800 ℃ hot vexed slag; Adopt infrared temperature measurement gun again, slag ladle is carried out to thermometric, in slag ladle skin temperature, lower than 425 ℃, the temperature of top skull, lower than 625 ℃, can be implemented to draw tank operation, guarantees safe production.

2. technique according to claim 1, is characterized in that: the model of hand-held infrared temperature measurement gun is RAYTEK, and by Futian Area of Shenzhen City, Guangdong Province, Lei Tai company produces.