CN2463393Y

CN2463393Y - Molten iron preprocessing unit

Info

Publication number: CN2463393Y
Application number: CN 01207152
Authority: CN
Inventors: 王振峰; 潘贻芳; 李树庆
Original assignee: TIANJIN TIANGANG GROUP CO Ltd; Zhengzhou University
Current assignee: TIANJIN TIANGANG GROUP CO Ltd; Zhengzhou University
Priority date: 2001-02-27
Filing date: 2001-02-27
Publication date: 2001-12-05
Anticipated expiration: 2011-02-27

Abstract

The utility model provides a simple molten iron preprocessing device, which can be improved on the basis of the structure of an iron container (such as an iron ladle). Through the reasonable structures of a molten iron eyelet, an iron flowing mouth, a slag discharging mouth, etc., the simple molten iron preprocessing device can realize the desulfurization or the dephosphorization, etc., of molten iron, and simultaneously can separate slag iron automatically. Industrial application shows that the utility model has the advantage of convenient operation, and the desulfurization rate and the dephosphorization rate can reach more than 50 percents.

Description

The hot metal pretreatment device

The utility model relates to a kind of molten iron treatment unit in ferrous metallurgy field.

At present, in smelting process, the outer pretreated method of molten iron stove is more, with regard to its apparatus-form, spraying type is arranged, shaking ladle formula etc.These equipment can both reach the purpose of desulfurization or dephosphorization, but have the equipment complexity, invest problems such as big, the operation of especially skimming trouble, and because of being with iron also can cause certain iron loss in the slag.In addition, spread the method for sweetening agent or dephosphorizing agent in the iron runner, though simple, there is the low and unsettled shortcoming of desulfurization (phosphorus) rate, operating environment is seriously polluted in addition.

Some desulfurization (phosphorus) agent fusing point is lower, as the composite desulfurizing agent or the big powder (Na that revives ₂CO ₃), with molten iron mixing process in just can melt.Therefore, if can construct a kind of device, utilize the drop of molten iron or the kinetic energy that flows and had, finish the thorough mixing of molten iron and desulfurization (phosphorus) agent or contact, molten iron and slag can be separated automatically again simultaneously, so not only can reach the purpose of desulfurization (phosphorus), and the great amount of investment of equipment such as can reduce that pulvis is carried, skimmed, operation can be simplified greatly again, be saved slag-removing time, reduce the hot metal temperature drop that causes thus.

The purpose of this utility model provide a kind of can desulfurization (phosphorus), molten iron and slag can be separated automatically again simultaneously, invest hot metal pretreatment device little, easy to use.

The utility model is achieved in that

The hot metal pretreatment device, construct by steel construction shell and refractory materials and to form, it is characterized in that: construct in the Sheng iron container that forms at steel construction shell and refractory materials, build partition wall by laying bricks or stones with refractory materials, with its separated into two parts, become row Tie Tong road and pretreatment chamber respectively, on partition wall, have molten iron to have a look at, will arrange Tie Tong road and pretreatment chamber and be communicated with; The Sheng iron wall of container of pretreatment chamber's one side is provided with the deslagging stem bar, and the Sheng iron wall of container of molten iron passage one side is provided with row's flowing molten iron mouth.Wherein, the position of deslagging stem bar is higher than row's flowing molten iron mouth, and the position of row's flowing molten iron mouth is higher than molten iron has a look at, to reach the automatic isolating purpose of slag iron.

Compared with prior art, the utility model has the advantages that: 1, because this use is novel by just realizing that to traditional hot metal ladle transformation therefore, compare with shaking ladle process or blowing process, equipment is simple, less investment, operation are simplified greatly.2, owing to can realize that slag iron separates automatically, do not need the equipment of skimming, save slag-removing time, reduce the hot metal temperature drop and the molten iron loss that cause thus.3, compare with blowing process, can reduce the dust pollution that pulvis conveying etc. causes.

Accompanying drawing 1 is the utility model section of structure, and Fig. 2 is a structure vertical view of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing.

In Fig. 1 and Fig. 2, the 1st, the ladle box hat, the 2nd, the ladle liner is made up of refractory material, and 3 The deslagging stem bar, the 4th, row's flowing molten iron mouth, the 5th, partition wall, the 6th, molten iron is had a look at, and 7,8 is the suspension hook nose, the 9th, thoroughly The gas brick, the 10th, shackle shaft. Ladle box hat 1 and ladle liner 2 are built into one and contain the iron container, at this Receptacle with refractory material laying or pour into a partition wall 5, is divided into two parts with this container, its In, A is the pretreatment chamber that is surrounded by liner 2, the bag end and partition wall 5, B be by liner 2, the bag end and every The molten iron passage in wall 5 besieged cities. Different according to building method and condition, the section of B can be circle, eye Eyeball shape or other shape. Molten iron is had a look at 6 should be from bag end 200mm above position, to avoid wrapping the floor iron water temperature Spend lowly, cause that molten iron condenses, and results in blockage. Sheng iron chamber wall in the A of pretreatment chamber one side is provided with Deslagging stem bar 3 is provided with row's flowing molten iron mouth 4 at the Sheng iron chamber wall of molten iron channel B one side, wherein: row The position of slag stem bar 3 is higher than row's flowing molten iron mouth 4, and the position of row's flowing molten iron mouth 4 is higher than molten iron and has a look at 6, to reach slag The purpose that iron separates automatically. In addition, in the bottom of the B of pretreatment chamber air brick 9 is installed, can strengthens and stir Mix. The position of air brick 9 is in arbitrary position of the B of pretreatment chamber bag bottom, is preferably in molten iron and has a look at 6 center lines Upper, bag two/Radius place, the end.

The utility model realizes that the course of work of desulfurizing iron is as follows:

When using the utility model, molten iron flows to pretreatment chamber from this device top, simultaneously to preliminary treatment The chamber adds desulfurization (or phosphorus) agent, because the proportion of molten iron is more great than the ratio of melt cinder, molten iron is in the bottom, and Desulfurization (or phosphorus) agent is on top, and molten iron is had a look at by molten iron and entered the molten iron passage; Along with molten iron constantly Flow into, the molten iron level in the molten iron passage constantly raises, and molten iron flows out from row's flowing molten iron mouth; Along with desulfurization (or phosphorus) agent constantly adds, and the melt cinder face in the pretreatment chamber constantly rises, at last can be from the deslagging stem bar Flow out. Certainly, also can handle assembly sling melt cinder is toppled over out. Because the position of row's flowing molten iron mouth is lower than The position of deslagging stem bar, therefore, pretreatment chamber's one side can form the liquid slag layer of certain altitude, and molten iron is being worn When crossing it, heat is passed to desulfurization (or phosphorus) agent, make its fusing, desulfurization or phosphorus reaction take place simultaneously; In addition, stir from air brick air blowing or other gas, the mass transfer that can more strengthen between the slag iron is anti-Should, good desulfurization (or dephosphorization) effect is arranged, thereby can realize desulfurization (or dephosphorization) worker to molten iron Make process.

In the course of the work, desulfurization (or dephosphorization) agent can adopt machinery or manual type to add continuously, also can intermittently add.In addition, when molten iron enters pretreatment chamber, also can blow, still can obtain sweetening effectiveness preferably from gas permeable brick.

Embodiment:

Embodiment is by being 30 tons to nominal appearance iron amount, finishes through the hot metal ladle transformation of 1.95M in the high 2.5M, cylinder-packing.With building together straight partition wall in the middle of high alumina brick is in 30 tons hot metal ladle by laying bricks or stones, constructing wide 200mm from bag end refractory surface 200mm place, the rectangle molten iron of high 300mm is had a look at, and partition wall is divided into big or small two Room with hot metal ladle.Little of the molten iron passageway, at this side 1.75M eminence welding row embolum, inner lining refractory; Big as pretreatment chamber, in its bag central position, the end, bottom, gas permeable brick is installed, its upper port place establishes the deslagging mouth.With sweetening agent and dephosphorizing agent molten iron is carried out desulfurization or dephosphorization treatment respectively, obtains following effect:

1, desulfurization

Adopt CaO-CaF ₂-Na ₂The O fimily desulfurizing agent is handled more than 5000 ton of molten iron, 1395 ℃ of molten iron medial temperatures.

The molten iron average assay is before handling: Si:1.2%; S:0.085%, P:0.085%;

Handling back molten iron average assay is: Si:1.15%; S:0.034%, P:0.081%; Desulfurization degree on average reaches 57%, and desulfurization degree is minimum to be 44.6%, and desulfurization degree is up to 71.6%.

2, dephosphorization

Adopt CaO-Fe ₂O ₃-Na ₂O is a dephosphorizing agent, handle 900 surplus ton molten iron, the molten iron medial temperature is 1402 ℃ before handling.

The molten iron average assay is before handling: Si:1.12%; S:0.045%, P:0.085%;

Handling back molten iron average assay is: Si:0.97%; S:0.040%, P:0.040%;

Dephosphorization rate on average reaches 52%, and dephosphorization rate is minimum to be 44.6%, and dephosphorization rate is up to 68.6%.

Claims

1. hot metal pretreatment device, construct by steel construction shell and refractory materials and to form, it is characterized in that: construct in the Sheng iron container that forms at steel construction shell and refractory materials, build partition wall by laying bricks or stones with refractory materials, with its separated into two parts, become row Tie Tong road and pretreatment chamber respectively, on partition wall, have molten iron to have a look at, will arrange Tie Tong road and pretreatment chamber and be communicated with; The Sheng iron wall of container of pretreatment chamber's one side is provided with the deslagging stem bar, and the Sheng iron wall of container of molten iron passage one side is provided with row's flowing molten iron mouth.

2. according to the said hot metal pretreatment device of claim 1, it is characterized in that the position of deslagging stem bar is higher than row's flowing molten iron mouth, row's flowing molten iron mouth is higher than molten iron and has a look at.