CN2453015Y

CN2453015Y - Slag blocking stopper for steel tapping from converter

Info

Publication number: CN2453015Y
Application number: CN 00261785
Authority: CN
Inventors: 曹松年
Original assignee: SONGLI METALLURGICAL FURNACE MATERIALS CO Ltd MAANSHAN
Current assignee: SONGLI METALLURGICAL FURNACE MATERIALS CO Ltd MAANSHAN
Priority date: 2000-12-01
Filing date: 2000-12-01
Publication date: 2001-10-10
Anticipated expiration: 2010-12-01

Abstract

The utility model relates to a slag blocking stopper for steel tapping from converters, and belongs to the technical field of the steel smelting. The utility model solves the problem that the furnace slag flows out along with the molten steel at the later stage of the steel tapping from the converter at present. A slag blocking stopper with a special shape is made of cast steel or cast iron and refractory material. In the process of slag blocking, the metal is smelted back to the molten steel, a large amount of high-quality refractory material is saved, the slag blocking efficiency achieves more than 99 %, the resulfurizatio and the rephosphorization are effectively prevented, the quality of the refining molten steel on the outside of the stove is improved, and the labor strength of the worker is reduced.

Description

The converter tapping floating plug

A kind of converter tapping floating plug, the technical field of smelting of genus steel.

According to the knowledge of the applicant,, be the slag that prevents to float on molten steel, wrap in molten steel and flow out, pollute molten steel, must block slag liquid, do not make it sneak into molten steel, dam in stove in the converter tapping later stage.The pneumatic pushing off the slag technology of external at present employing, with high costs, though blocked slag liquid, guaranteed the pure of molten steel, remaining molten steel is more in the converter, and the molten steel recovery rate is low, causes waste.Present domestic most iron and steel enterprises use the slag-blocking ball pushing off the slag, be generally dual mode: the one, manual operation, promptly throw slag-blocking ball facing to converter taphole by artificial, the 2nd, with the converter synchronization job, fasten slag-blocking ball with iron wire, hook block reaches near the tap hole on interlock operation bar, molten steel fusing iron wire, slag-blocking ball falls down.Because the proportion of slag-blocking ball is chosen between slag liquid and the molten steel, promptly little the slag-blocking ball that enters under above two kinds of situations swims between molten steel and the slag liquid its proportion and bigger than slag liquid than molten steel, with MOLTEN STEEL FLOW, is brought to tap hole, blocks slag.The fatal shortcoming of these two kinds of methods is that hit rate is low, only about 80%, because slag-blocking ball and tap hole dislocation promptly cause slag liquid to spill with molten steel, molten steel is polluted sometimes.

The purpose of this utility model will be made a kind of pushing off the slag part exactly, and it has high hit rate, and good pushing off the slag effect is arranged, and guarantees the cleaning of molten steel, can obtain maximum molten steel recovery rate simultaneously, and cost is not high, easy to use.

The utility model is like this design: a kind of converter tapping floating plug, and it is made up of with passing the plug at its center and being enclosed within the tail rod that plug stretches out land portions hemispheric chock plug, and it is semicircular arcuate furrow that semisphere chock plug both sides have cross section; Tail rod is made by refractory materials, and its shell of semisphere chock plug is by steel or castiron, and its inner core is that the refractory materials that mixes iron and steel particle or iron and steel fiber is made; The effect of refractory materials is not melted by molten steel.

Service condition of the present utility model is in the converter tapping later stage, one of the plug of floating plug by the mechanical manipulator clamping, reaches tap hole; Because the relative tap hole of tail rod diameter of floating plug is very little, tail rod very easily enters tap hole, hemispheric chock plug is suspended in slag liquid and molten steel interface, when molten steel flows to end soon, chock plug begins to clog tap hole, and molten steel flows out from the twice groove on the one hand, melts iron-clad on the other hand rapidly, from the slit, flow out, and slag liquid can't drop down.After iron-clad had melted, inner core combined with the tap hole of being made by refractory materials, blocks slag liquid rapidly.The utility model hit rate is high, when guaranteeing to flow out the cleaning of molten steel, obtains bigger molten steel recovery rate as far as possible.

Below in conjunction with accompanying drawing structure of the present utility model is further described.

Fig. 1 is an organigram of the present utility model.

Fig. 2 Fig. 3 is the organigram of chock plug, and wherein Fig. 3 is the A-A sectional view of Fig. 2.

Fig. 4 is the utility model service condition synoptic diagram.

Among the figure:

1. plug 2. chock plugs 3. tail rods 4. shells 5. inner cores 6. mechanical manipulators 7. converter bodies 8. tap holes 9. molten steel 10. slag liquid

As can be seen from Figure 1, main part of the present utility model is hemispheric chock plug (2), and plug (1) passes from its center, in the part that plug (1) stretches out chock plug (2) sphere, is with the tail rod of being made by refractory materials (3) on it.

Can find out that from Fig. 2 and Fig. 3 the outside of chock plug (2) is steel or castiron shell (4), inside is the inner core of being made by the refractory materials that mixes iron and steel particle or iron and steel fiber (5).Both sides in shell (4) respectively have a cross section to be circular arcuate furrow.

As can be seen from Figure 4, converter body (7) is toppled over, and molten steel (9) flows out from tap hole (8).Mechanical manipulator (6) is being controlled plug (1) chock plug (2) is being sent between molten steel (9) and the slag liquid (10), and its tail rod (3) is sent into tap hole (8) inner chamber because diameter is less.When molten steel (9) when flowing to end soon, chock plug (3) gets lodged in and carries out pushing off the slag for the first time in early stage on the inner chamber of tap hole (8), molten steel is gone up the groove outflow of both sides on the one hand from chock plug (3), the pyritous molten steel melts the shell (4) of chock plug (3) rapidly on the other hand, form the slit and flow out always, and meanwhile, slag liquid (10) is because proportion is less thicker again, then be blocked, can't flow out.But after shell (4) melted away gradually, inner core (5) was also along with coming out, and combined with tap hole (8) as refractory materials, blocked tap hole (8), carried out the secondary pushing off the slag, thereby stoped slag liquid to flow out effectively.

The utility model brings up to 99% with the pushing off the slag rate, has prevented time sulphur effectively, and rephosphorization (being beneficial to the exploitation of new kinds of steel) has improved the quality of external refining molten steel.70% metal melt back of the utility model material is in molten steel, and metal obtains recycling.The utility model has been saved the high-quality refractory material resource, has reduced production cost, thereby has reduced steelmaking ingredient consumption, has reduced steel-making cost.The utility model has significantly reduced working strength of workers.The utility model is subjected to operator's generally commendation after trying out in the converter of different sizes.The utility model simple structure, easy to use, guaranteeing good pushing off the slag effect, obtain molten steel recovery rate as much as possible when guaranteeing the molten steel cleaning.

Claims

1. converter tapping floating plug is characterized in that it by hemispheric chock plug with pass the plug at its center and be enclosed within the tail rod that plug stretches out land portions and form, and it is semicircular arcuate furrow that semisphere chock plug both sides have the cross section; Its shell of hemispheric chock plug is by steel or castiron, and its inner core is that the refractory materials that mixes iron and steel particle or iron and steel fiber is made, and its tail rod is also made with refractory materials, and the effect of refractory materials is not melted by molten steel.