CN1140641C

CN1140641C - Process and equipment for preparing sintered ore

Info

Publication number: CN1140641C
Application number: CNB001111396A
Authority: CN
Inventors: 杨东进
Original assignee: Sinter Plant Laiwu Iron & Steel Co Ltd
Current assignee: Sinter Plant Laiwu Iron & Steel Co Ltd
Priority date: 2000-06-14
Filing date: 2000-06-14
Publication date: 2004-03-03
Anticipated expiration: 2020-06-14
Also published as: CN1276436A

Abstract

The present invention relates to a process and equipment which are used for preparing a sintered ore. In the present invention, mixtures containing solid fuel are distributed on a trolley continuously moving forward via a distributor, the mixture layers continuously combust downward under the action of negative pressure of air draft after being lighted by a lighter, so that a high temperature can be generated to soften or melt partial mixtures; the temperature of the upper layer is reduced with the continuous downward movement of a combustion zone, a liquid phase is gradually cooled, solidified and agglomerated, and then the solidified surface layers are crushed by crushing teeth on a crushing toothed roll 1 arranged on the trolley via machine frames 4 on both sides of the trolley so as to enhance the ventilation properties of the mixture layers, ensure the normal combustion of fuel, improve the size composition of the sintered ore and increase the output of the sintered ore.

Description

A kind of production method of agglomerate and equipment

Affiliated technical field

The invention belongs to metallurgical technology field, specifically a kind of production method of agglomerate and equipment.

Background technology

The production method overwhelming majority of existing agglomerate is an exhausting formula sintering, its basic production process is: will contain solid-fuelled compound and pass through distributor cloth to the chassis of sintering device handpiece, the chassis successive moves forward, fuel in the compound top layer on the chassis, when the lighter for ignition by the flame ignition of lighter for ignition, under the effect of exhausting negative pressure, air passes the bed of material then, and oxygen wherein and the fuel in the bed of material react and constantly burns, produce high temperature, a series of chemical reaction takes place in compound local softening or fusing, generates the liquid phase of some amount, subsequently, along with moving down gradually of zone of combustion, temperature reduces, and liquid phase is cooled off gradually and is frozen into piece.In the exhausting process, along whole bed depth, will present the several fields of different in kind: the superiors are sintering mine belts, are downwards zone of combustion, preheating zone successively, cross to wet and be with and original strip.Along with constantly moving ahead of truck, fuel tape and following each band move down gradually, and the sintering mine belt is thickeied gradually, and the original mixed strip is attenuate gradually.Under normal circumstances, when closing on tail, sintering process is finished, and the bed of material on the chassis all becomes the agglomerate cake.When chassis process sinter machine tail wheel, the agglomerate cake is discharged into the single roll crusher of tail wheel rear lower, and chassis turns back to the cloth position through loop, sinter machine great wheel then.So constantly circulation, SINTERING PRODUCTION is carried out continuously.In each band in the bed of material,,, thereby make the ventilation property variation of top layer agglomerate, lower vertical sintering temperature because the fluctuation of ignition temperature can cause the superfusion of agglomerate top layer though under normal circumstances the ventilation property of sintering mine belt is best.At present, in order to reduce the influence of agglomerate top layer superfusion to ventilation property, normal employing reduces the measure of ignition temperature, but has also reduced the one-tenth knot rate of agglomerate, has increased quantity of return mines.In addition, when the agglomerate cake entered single roll crusher, because the composition of agglomerate and ore deposit are complicated mutually, intensity was inhomogeneous, and the agglomerate piece size after causing the ore deposit broken differs, and bulk is cooling difficulty on belt-cooling machine, also can stop up the equipment such as funnel of subsequent handling.

Technology constitutes:

The object of the present invention is to provide and a kind ofly can improve permeability of sintering material bed, help improving vertical sintering speed, improve agglomerate quality production method and for realizing the equipment of this generation method.The production method of the said agglomerate of the present invention is the improvement that traditional sintering method is carried out, and will at first solidify caked upper epidermis fragmentation in sintering process, improves the ventilation property of sinter bed, accelerates vertical sintering speed.Its concrete production process is: will contain solid-fuelled compound, by distributor cloth to the chassis of sintering device handpiece, the chassis successive moves forward, the bed of material on the chassis, when the lighter for ignition by the flame ignition of lighter for ignition, air passes the bed of material under the effect of exhausting negative pressure then, the bed of material is constantly burnt, produce high temperature, a series of chemical reaction takes place in compound local softening or fusing, generate the liquid phase of some amount, along with moving down gradually of zone of combustion, the upper strata temperature reduces, and liquid phase cooled and solidified gradually becomes piece, when chassis closes on tail, sintering process is finished, and the bed of material all becomes sinter cake, chassis capable during to tail wheel sinter cake be discharged in the crusher at tail wheel rear portion.Its technical essential is: when the liquid phase that forms on the bed of material surface of crossing through high-temp combustion on the chassis was frozen into piece gradually, chassis was through shredder assembly, by the surface solidification layer fragmentation of this shredder assembly with agglomerate, to improve the ventilation property of the bed of material.The broken thickness of agglomerate surface is generally 20-100mm.

Description of drawings:

Fig. 1 is a structure principle chart of the present invention;

Fig. 2 is the A-A sectional view of Fig. 1.

Be described in detail realizing equipment of the present invention with reference to accompanying drawing:

For realizing that the designed agglomerate production unit of the present invention is: this equipment comprises distributor, chassis 5, lighter for ignition, the extractor fan that constitutes legacy equipment, its technical essential is: at the both sides at chassis 5 middle parts fixed installation organic frame 4, bearing assembling 2 moving up and down is installed in the chute of frame 4, the two ends spindle nose of broken discaling roll 1 is installed in the mobile bearing assembling 2, has crushing teeth on the cylindrical surface of broken discaling roll 1.Its principle of work is: moving ahead of sintering pallet drives broken discaling roll 1 rotation by the bed of material, the rotation of broken discaling roll 1 makes crushing teeth on the broken discaling roll 1 under the effect of gravity such as broken discaling roll, bearing assembling, constantly strike agglomerate 6 top layers, make its fracture.

In order to make crushing teeth that enough cracking pressures be arranged, can in bearing assembles the chute of the frame 4 above 2, counterweight 3 be installed, the size of counterweight 3 can be adjusted according to the surperficial sintering situation of the bed of material.

The present invention increases the crushing process of first solidification layer in the production of agglomerate, with the fragmentation of agglomerate surface solidification layer, can improve the ventilation property of sintered layer well, guarantee the trouble-free burning of the bed of material, and make the solidification layer generation be similar to the effect that cuts a piece of glass, be after agglomerate is discharged into single roll crusher, forcing down of crusher, agglomerate will the part broken surfacewise texture cracked, thereby make the agglomerate lumpiness after the fragmentation even relatively, reduce the generation of bulk, improve the quality of agglomerate and increase output, and can cut down the consumption of energy.For realize that the agglomerating plant structure that surface fracture designs is also fairly simple, use, manufacturing cost be also lower, do not need again legacy equipment is carried out big transformation.

Claims

1, a kind of production method of agglomerate, it is to pass through distributor cloth to the chassis of sintering device handpiece with containing solid-fuelled compound, the chassis successive moves forward, the bed of material on the chassis, when the lighter for ignition by the flame ignition of lighter for ignition, air passes the bed of material under the effect of exhausting negative pressure then, the bed of material is constantly burnt, produce high temperature, a series of chemical reaction takes place in compound local softening or fusing, generate the liquid phase of some amount, along with moving down gradually of zone of combustion, the upper strata temperature reduces, and liquid phase cooled and solidified gradually becomes piece, when chassis closes on tail, sintering process is finished, and the bed of material all becomes sinter cake, when chassis runs to tail with the sintered material discharging, it is characterized in that: when the liquid phase that forms on the bed of material surface of crossing through high-temp combustion on the chassis is frozen into piece gradually, chassis is through shredder assembly, by the surface solidification layer fragmentation of this shredder assembly with agglomerate, to improve the ventilation property of the bed of material.

2, a kind of equipment of producing agglomerate, it comprises distributor, chassis (5), lighter for ignition, extractor fan, it is characterized in that: at the both sides at chassis (5) middle part fixed installation organic frame (4), in the chute of frame (4), be equipped with and assemble in (2) by upper and lower mobile bearing, the two ends spindle nose of broken discaling roll (1) is installed in the mobile bearing assembling (2), has crushing teeth on the cylindrical surface of broken discaling roll (1) and constitutes.

3, a kind of equipment of producing agglomerate according to claim 2 is characterized in that: the counterweight (3) that increases the crushing teeth cracking pressure is installed in the chute of the frame (4) on bearing assembling (2) constitutes.