CN201346476Y

CN201346476Y - Built-up welding grate bar of single roll crusher for sinters

Info

Publication number: CN201346476Y
Application number: CNU2008201569448U
Authority: CN
Inventors: 丛林火; 丛欣滋
Original assignee: SHANGHAI JINCHUAN MECHANICAL AND ELECTRICAL TECHNOLOGY Co Ltd
Current assignee: SHANGHAI JINCHUAN MECHANICAL AND ELECTRICAL TECHNOLOGY Co Ltd
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-11-18
Anticipated expiration: 2018-12-11

Abstract

The utility model provides a built-up welding grate bar of a single roll crusher for sinters, which comprises a grate bar ingot. The grate bar is characterized in that the left and the right sides of the upper side of the grate bar ingot are respectively provided with an olive-shaped abrasion-resistant layer, the longitudinal section of which is large in the middle and small at both ends; the upper half cambered surface of each abrasion-resistant layer is arranged outside of the grate bar ingot; the lower half cambered surface of the abrasion-resistant layer is arranged inside the grate bar ingot; and at least four anti-flaking reinforcing bars are implanted in the abrasion-resistant layers. The utility model changes the structure of the grate bar, the thickness of the abrasion-resistant layers of the abraded parts is greatly increased, and meanwhile, the composite structure fabrication technology is adopted as a measure to further solve the problem that a high-thickness built-up welding layer can easily flake off. Consequently, the service life of the built-up welding grate bar with the high-thickness abrasion-resistant layers, an anti-flaking property and high impact-resistant load is greatly prolonged.

Description

A kind of sintering deposit single roll crusher built-up welding grate bar

Technical field

The utility model relates to a kind of sintering deposit single roll crusher built-up welding grate bar, belongs to metallurgical equipment built-up welding grate bar technical field.

Background technology

Now, it is the first road flow process that industry ironmaking sinters mineral powder into pelletizing, and sintering temperature is about 1200 ℃, and whole process is worked continuously.Sinter cake arrives the sintering machine tail end, and on the grate bar of disintegrating machine, the monodentate roller through rotating carries out the hot shearing attrition crushing from several meters eminence landings.The condition of work of grate bar is very abominable, and environment temperature is about 700～800 ℃.Under this temperature, all antifriction metal (AFM)s are all obviously softening, and the sintering deposit of iron is hard especially, and wearing and tearing are just more serious.The density of sintering deposit is very big, and big sinter cake has several weights, and so heavy sinter cake gets off from several meters eminence landings, and the grate bar will be subjected to very big impact load.

The grate bar that steel plant use mostly is built-up welding part or alloy steel casting.Because operating mode, the steel-casting material can not be crisp too firmly, otherwise be easy to generate fracture.The fracture of grate bar will be once very serious production accident, so the wearability of steel-casting grate bar is relatively poor, thereby influence its service life.The grate bar of built-up welding, in order to improve its service life, the built-up welding wlding of selecting for use is all crisp extremely firmly.The grate bar overlay cladding wearing and tearing of built-up welding were promptly lost efficacy and were scrapped, so overlay cladding thickness is determining the service life of grate bar.But overlay cladding is blocked up to be easy to produce and to peel off, thereby influences its service life.Now, the performance of the high-abrasive material of built-up welding grate bar has reached limit degree, solve grate bar problem in service life from this aspect, has not had potentiality and can dig.

As shown in Figure 1, be traditional built-up welding grate bar blank schematic diagram.Normally at the thick wearing layer of the abrading section, top of built-up welding grate bar blank 4 flat heap 10～15mm.If overlay cladding is thick again the danger of peeling off is just arranged.Promptly be to adopt wearing layer and the stacked overlaying method that adds of carbon steel, the wearing layer crack also can expand to the carbon steel layer, and the carbon steel layer still can seriously chap, and is not connected and fixed between carbon steel overlay cladding and the grate bar parent, does not have the effect of anti-strip basically.Because the symmetry of sintering deposit single roll crusher grate bar both sides, so after all being a wear out failure in using, till tune is used and lost efficacy.

This shows, be that built-up welding part or alloy steel casting grate bar all exist short problem in service life.The grate bar is short service life, causes the consumption of grate strip material, processing charges and the energy, increases production cost and influences production operation.

The utility model content

After providing a kind of long service life and lost efficacy, the purpose of this utility model can repair again the sintering deposit single roll crusher built-up welding grate bar of usefulness.

In order to achieve the above object, the technical solution of the utility model has provided a kind of sintering deposit single roll crusher built-up welding grate bar, comprise grate bar blank, it is characterized in that, respectively be provided with a longitudinal section in the right and left grate bar abrading section, the top of grate bar blank and be the little anti abrasion layer in two broad in the middle, in anti abrasion layer, be implanted with at least four anti-strip gusset bars.The several requirement decisions of the sheet of anti-strip gusset bar according to grate bar length and grate bar service life.

Further, the degree of depth of second cambered surface of anti abrasion layer is 10～100mm.The height of first cambered surface of anti abrasion layer is 10～150mm.

The utility model has changed the structure of grate bar, increases considerably abrading section wearing layer thickness, and adopts the composite construction manufacturing technology to be easy to generate the measure of peeling off as further solving big thickness overlay cladding simultaneously.Have the built-up welding grate bar of big thickness wearing layer anti-strip, anti-shock loading like this, will improve greatly service life.

Description of drawings

Fig. 1 is traditional built-up welding grate bar blank schematic diagram;

The blahk structure schematic diagram of a kind of sintering deposit single roll crusher built-up welding grate bar that Fig. 2 provides for the utility model;

A kind of sintering deposit single roll crusher built-up welding grate bar that Fig. 3 provides for the utility model.

The specific embodiment

Specify the utility model below in conjunction with embodiment.

Embodiment

As shown in Figure 2, the blahk structure schematic diagram of a kind of sintering deposit single roll crusher built-up welding grate bar that provides for the utility model, grate bar blank 3 is No. 35 steel forgings, respectively be provided with a circular arc built-up welding groove at grate bar blank 3 top the right and lefts, the maximum groove depth H1 of circular groove is 50mm, and the height of projection H2 that sets wearing layer 1 that will built-up welding on circular groove is 100mm.According to the shape and size of circular groove, by the position that anti-strip gusset bar 2 is set, 22 anti-strip gusset bars 2 not of uniform size of every preparation, promptly a sintering deposit single roll crusher built-up welding grate bar needs 44.Anti-strip gusset bar 2 thicknesss of slab are 10mm, and width is the width of grate bar blank 3, and material is an ordinary carbon steel.In the position, deep of circular groove, be spaced apart 40mm between the anti-strip gusset bar 2, at the thin position of circular groove both sides overlay cladding, the interval between the anti-strip gusset bar 2 is amplified to 50～60mm.

Before hardfacing, anti-strip gusset bar 2 is weldingly fixed in the circular groove of grate bar blank 3 according to desired location, implement built-up welding by the bead-welding technology of working out then, promptly form a longitudinal section and be the little approximate olive shape anti abrasion layer 1 in two broad in the middle, grate bar two sides are 8mm by the design specification determiner overlay cladding thickness of traditional built-up welding grate bar.

Through after the above-mentioned steps, promptly make a sintering deposit single roll crusher built-up welding grate bar as shown in Figure 3.

Claims

1. sintering deposit single roll crusher built-up welding grate bar, comprise grate bar blank (3), it is characterized in that, respectively be provided with the longitudinal section at top the right and left of grate bar blank (3) and be the little olive shape anti abrasion layer (1) in two broad in the middle, in anti abrasion layer (1), be implanted with at least four anti-strip gusset bars (2).

2. a kind of sintering deposit single roll crusher built-up welding grate bar as claimed in claim 1 is characterized in that the degree of depth (H1) of second cambered surface of anti abrasion layer (1) is 10～100mm.

3. a kind of sintering deposit single roll crusher built-up welding grate bar as claimed in claim 2 is characterized in that the height (H2) of first cambered surface of described anti abrasion layer (1) is 10～150mm.