CN201575703U

CN201575703U - Sintering ignition furnace

Info

Publication number: CN201575703U
Application number: CN2009203191950U
Authority: CN
Inventors: 贺新华; 朱飞; 王赛辉
Original assignee: Zhongye Changtian International Engineering Co Ltd
Current assignee: Zhongye Changtian International Engineering Co Ltd
Priority date: 2009-12-30
Filing date: 2009-12-30
Publication date: 2010-09-08
Anticipated expiration: 2019-12-30

Abstract

The utility model discloses a sintering ignition furnace, including a furnace body and more than four burners, wherein a channel for the trolley to pass through is formed along the length direction of the furnace body in the furnace body, the burners are mounted on the mounted on the furnace body and are arranged facing to the charge level in the trolley, the burners are arranged in a row or a plurality of rows in the width direction of the furnace body, the direction along the running direction of the trolley is the front side, more than one edge burner is provided above the edge point at both sides of the trolley, the edge burner is arranged at the front side of the burner. The utility model is a sintering ignition furnace with simple and compact structure, low cost, simple and convenient installation, and capability of reducing the edge effect and improving sintering quality and sintering yield.

Description

Sintering ignition furnace

Technical field

The utility model is mainly concerned with the agglomerating plant field, refers in particular to the ignition installation that a kind of sintering process is used.

Background technology

Igniting is important link in the sintering process flow process.In modern sintering process process, ignition furnace is used to provide hot strip flame to mix surface, make solid fuel wherein fire burns, and make top layer compound sintering under ignition furnace high-temperature flue gas and solid fuel ignition exothermic effects, the heat that provides sufficient oxygen amount that the top layer is put aside by the air exhauster exhausting is passed to down one deck compound simultaneously, makes sintering process carry out rapidly downwards thereby impel the solid fuel that descends one deck to burn away.The sintering ignition system requires ignition furnace that enough ignition intensities and firing temperature should be arranged, and the suitable high temperature retention time also will be arranged, and also wants simultaneously and can evenly light a fire along chassis length and width.The quality of igniting will have influence on directly that can sintering process carry out smoothly and the intensity of sintering deposit.Firing temperature is low excessively, and the heat of top layer sinter mixture savings is not enough to create clean-burning condition to lower floor very little, can't make the mixing bed of material reach sintering strength, will produce a large amount of returning mine.Otherwise firing temperature too high or duration of ignition is long can cause the superfusion of sinter mixture top layer influence the air communication mistake again, the reduction bed permeability, reduce vertical sintering speed, thereby cause productivity ratio to reduce, make the FeO content of sintering deposit raise the reducing property variation simultaneously.

Existing old-fashioned ignition furnace burner distributing position such as Fig. 1, Fig. 2 and shown in Figure 3, burner 2 is straight along straight line and is distributed on the body of heater 1, totally two arrange burners 2, spacing between row and row and among the same row between burner 2 and the burner 2 all is to determine through accurate calculating, can guarantee to form a thermal-flame band on the sintering feed surface, by the draft effect of main exhauster, the heat on top layer is passed to down one deck compound, thus the sintering process of finishing.There is following problem in this structure:

Referring to Fig. 4, Fig. 5 and Fig. 6, the curve a among Fig. 4 represents the variation of chassis breast board place wind speed with the distance of advancing, and curve b represents the variation of chassis central part wind speed with the distance of advancing; Curve c among Fig. 5 represents the variation of chassis breast board place combustion zone thickness with the distance of advancing, and curve d represents the variation of central part combustion zone thickness with the distance of advancing.Because bed of material both sides contact with the chassis wallboard and have the gap, make that the resistance ratios mid portion of bed of material both sides air intake is little, air draught speed in bed of material both sides is faster than bed of material mid portion, i.e. the edge effect of sintering machine.The bed of material is thick more, the sintering master takes out that negative pressure is big more, and bed of material both sides air draught speed and middle part difference are big more, and it is obvious more to produce edge effect.Because limit portion wind speed is too fast, cause the fixed carbon on the bed of material top layer of two side portions to be difficult to igniting on the one hand, on the other hand, igniting is finished in the bed of material top layer of two side portions in a single day, burning velocity in its bed of material is far away faster than the burning velocity of the middle part bed of material, cause the both sides sintering end point than mid portion in advance, the bed of material is thick more, the both sides sintering end point more in advance.Because the influence of edge effect makes sintering finished rate along chassis section direction, low more the closer to the bed of material yield rate at chassis wallboard place, sinter quality is poor more; Simultaneously, along with the raising of thickness of feed layer, the increasing of the influence of edge effect, the yield rate of sintering machine bed of material integral body also progressively reduces, and the whole variation of sinter quality is referring to Fig. 6.Be that chassis is when moving through the burner combustion band, may will two kinds of situations appear: when the normal ignition needs are satisfied in the charge level heat supply at middle part, the heat supply deficiency can appear in the charge level of chassis two side portions, the feasible fixed carbon on the bed of material top layer of chassis two side portions that leans on is lighted a fire not exclusively, even partly can not put fire, cause the both sides sinter quality poor; When the charge level heating load of chassis two side portions can satisfy the normal ignition needs, the burning situation can appear in the charge level heating load surplus at chassis middle part, make the middle part charge level produce and melt phenomenon, cause charge level to harden, reduced the charge level gas permeability, cause the middle part sinter quality to reduce.

The utility model content

The technical problems to be solved in the utility model just is: at the technical problem that prior art exists, the utility model provides a kind of simple and compact for structure, with low cost, simple installation, can reduce edge effect, improve sintering quality, improve the sintering ignition furnace of sintering finished rate.

For solving the problems of the technologies described above, the utility model by the following technical solutions.

A kind of sintering ignition furnace, comprise body of heater and the burner more than four, length direction along body of heater in the described body of heater forms the passage that passes through for chassis, the charge level that described burner is installed on the body of heater and in chassis is arranged, described burner is arranged in a row or more along the width of body of heater, it is characterized in that: the traffic direction along chassis is the place ahead, the top that is positioned at place, chassis both sides of the edge on the described body of heater is equipped with one with the top edge burner, and described edge burner is arranged at the place ahead of burner.

As further improvement of the utility model:

The edge burner of each top, lateral edges place of described chassis is arranged to a row along the length direction of body of heater.

Compared with prior art, advantage of the present utility model just is: ignition furnace of the present utility model, simple and compact for structure, with low cost, simple installation, by above the chassis edge, setting up the edge burner, strengthen the heat supply intensity of chassis edge, thereby improved sintering quality and sintering finished rate.

Description of drawings

Fig. 1 is the main TV structure schematic diagram of prior art ignition furnace;

Fig. 2 is the plan structure schematic diagram of ignition furnace in the prior art;

Fig. 3 is the sectional structure schematic diagram at A-A place among Fig. 2;

Fig. 4 be chassis during by ignition furnace transversely wind speed with the schematic diagram of the variable in distance of advancing;

Fig. 5 be chassis during by ignition furnace sinter bed internal combustion band with the schematic diagram of the variable in distance of advancing;

Fig. 6 is the schematic diagram that thickness of feed layer, chassis edge change to middle part distance and sintering deposit yield rate;

Fig. 7 is the main TV structure schematic diagram of the utility model ignition furnace;

Fig. 8 is the plan structure schematic diagram of the utility model ignition furnace;

Fig. 9 is the sectional structure schematic diagram at B-B place among Fig. 8.

Marginal data

1, body of heater; 2, burner; 3, passage; 4, chassis; 5, edge burner.

The specific embodiment

Below with reference to specific embodiment and Figure of description the utility model is described in further details.

As Fig. 7, Fig. 8 and shown in Figure 9, ignition furnace of the present utility model, comprise body of heater 1 and the burner more than four 2, length direction along body of heater 1 in the body of heater 1 forms the passage 3 that passes through for chassis 4, burner 2 is installed on the body of heater 1 and the charge level in chassis 4 is arranged, burner 2 is arranged in a row or more along the width of body of heater 1, the place ahead that operates to along chassis 4, be positioned on the body of heater 1 chassis 4 both sides of the edge places directly over be equipped with one with top edge burner 5, edge burner 5 is arranged at the place ahead of burner 2.The flame injection direction of burner 2 can be vertical with chassis 4 traffic directions, also can out of plumb.When adopting the above burner 2 of two rows, the flame injection direction can be all vertical with chassis 4 traffic directions, and also out of plumb all also can the vertical or row's out of plumb of a row.In the present embodiment, the edge burner 5 directly over chassis 4 each lateral edges place is arranged to a row along the length direction of body of heater 1.Remove like this and adopt normal two row's burners 2, can satisfy outside the heat supply of charge level normal ignition needs at sintering machine middle part, the utility model has also increased edge burner 5 newly, and edge burner 5 only carries out local heat supply to the both sides of sintering pallet 4, satisfy the charge level normal ignition heat supply needs that chassis 4 both sides are influenced by edge effect, when can guarantee the charge level normal ignition at sintering machine middle part, the charge level of both sides also can normal ignition.By this enhancing limit portion heat supply intensity, can be used for reducing edge effect influences sintering quality.

The above only is a preferred implementation of the present utility model, and protection domain of the present utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to protection domain of the present utility model.Should be pointed out that for those skilled in the art in the some improvements and modifications that do not break away under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. sintering ignition furnace, comprise body of heater (1) and the burner more than four (2), length direction along body of heater (1) in the described body of heater (1) forms the passage (3) that passes through for chassis (4), described burner (2) is installed on the last and layout of the charge level in chassis (4) of body of heater (1), described burner (2) is arranged in a row or more along the width of body of heater (1), it is characterized in that: the traffic direction along chassis (4) is the place ahead, the top that is positioned at place, chassis (4) both sides of the edge on the described body of heater (1) is equipped with one with top edge burner (5), and described edge burner (5) is arranged at the place ahead of burner (2).

2. sintering ignition furnace according to claim 1 is characterized in that: the edge burner (5) of each top, lateral edges place of described chassis (4) is arranged to a row along the length direction of body of heater (1).