CN2344410Y

CN2344410Y - Washed coal fired negative pressure sintering furnace

Info

Publication number: CN2344410Y
Application number: CN 98225489
Authority: CN
Inventors: 王秋森; 王栋; 石天吉
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-30
Filing date: 1998-10-30
Publication date: 1999-10-20
Anticipated expiration: 2008-10-30

Abstract

The utility model relates to a coal fired negative pressure sintering furnace used for iron-making industry, comprising a furnace shaft whose inner cavity is filled with brown iron oxide balls and a furnace chamber. The center of the inner cavity of the furnace shaft is provided with a central cylinder whose lower end is communicated with an exhaust blower via a connecting tube; the furnace chamber is distributed around the periphery of the middle part of the furnace shaft. The utility model can reduce the energy consumption, enhances the sintering quality and decreases the environment pollution.

Description

Washed coal negative pressure sintering oven

The utility model relates to the sintering oven of the ferric oxide sphere of powder that a kind of iron industry uses, particularly a kind of washed coal negative pressure sintering oven.

As everyone knows, with iron powder ironmaking, be iron powder to be added water mix that to stir into diameter be 2-3 centimetre the ferric oxide sphere of powder, heat-agglomerating in sintering oven then then can be smelted iron in iron-smelting furnace.In the prior art, the shaft furnace SINTERING TECHNOLOGY is used widely, and its sintering oven has the combustion raw coal, and burner hearth is distributed in the bottom of shaft, and to burner hearth blowing pressurization, thorax is with operation under positive pressure in the shaft.This sintering oven energy consumption is higher, and sintering quality is relatively poor, and surrounding environment is had pollution.

The purpose of this utility model is to provide a kind of washed coal negative pressure sintering oven, can reduce energy consumption, improves sintering quality and reduces environmental pollution.

For achieving the above object, the utility model adopts following technical proposals: the same shaft and the burner hearth that includes the inner chamber filling ferric oxide sphere of powder with prior art of the utility model.It is characterized in that the shaft lumen centers has a central cylinder, vacuum fan is connected by pipe connecting in the central cylinder lower end; Burner hearth is distributed in around the periphery, middle part of shaft.In use, at burner hearth internal combustion cleaned coal, combustion gas enters the shaft inner chamber from burner hearth, under the air draught effect of vacuum fan, fuel gas return-flow is gone into central cylinder and pipe connecting and is extracted out by vacuum fan, and then the shaft inner chamber is in the negative pressure operation, the filling ferric oxide sphere of powder in the annular housing between shaft inwall and central cylinder outer wall, the ferric oxide sphere of powder is under the heating of combustion gas and sintering finished, then in the discharging of restoration of lower stack exit.In the use, continuously-running, constantly reinforced above shaft, and in shaft outlet discharging.Because operation continuously under negative pressure, own oxidation heat energy in the time of making full use of combustion gas heat energy and ferric oxide sphere of powder sintering is so can reduce energy consumption; Owing to use cleaned coal, can improve sintering quality; Owing to use cleaned coal and vacuum fan air draught smoke evacuation, thereby can reduce pollution to surrounding environment.

Central cylinder of the present utility model top is than the low one section virtual height in shaft top, and foot is extracted out in making combustion gas flow into central cylinder.Periphery, the shaft middle part 10-30 burner hearth that distributing can be along evenly input combustion gas around the shaft.A platform is fixed in shaft periphery below burner hearth, is convenient to the fireman and manipulates.There is the ring-type cooling water cavity in the restoration of lower stack exit, is used to add recirculated water discharging is cooled off.

The utility model has following conspicuous advantage compared with prior art: can cut down the consumption of energy, thereby reduce processing charges, can reduce processing charges 1/4th than prior art; Can improve sintering quality, the pelletizing external form of finished product is smooth, uniform particles, and physical strength is good, behind the adding blast furnace, helps improving the ventilation property of high furnace charge grain, makes blast-furnace smelting smooth, not hanging; Can reduce pollution to surrounding environment.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the structural representation of an embodiment of the utility model.

Fig. 2 is the schematic perspective view of Fig. 1 example.

An optimum implementation of the present utility model is: referring to Fig. 1 and Fig. 2, this washed coal negative pressure sintering oven includes shaft 1 and the furnace chamber 3 that inner chamber is loaded the ferric oxide sphere of powder 12, shaft 1 lumen centers has a central cylinder 2, and vacuum fan is connected by pipe connecting 8 in the lower end; Burner hearth 3 is distributed in around the periphery, middle part of shaft 1.Central cylinder 3 tops are than the low one section virtual height in shaft 1 top, and foot is extracted out in making combustion gas flow into central cylinder.Periphery, shaft 1 middle part 18 burner hearths 3 that distributing.A platform 4 is fixed in shaft 1 periphery of burner hearth 3 belows.There is ring-type cooling water cavity 5 at shaft 1 lower part outlet 7 places, water inlet pipe 11 and rising pipe 6 are arranged and connection recirculated water.Shaft 1 is by helping plate 10 to fixedly connected with base plate 9, and base plate 9 can be used for fixing on the ground.

Claims

1. washed coal negative pressure sintering oven that iron industry is used, the shaft (1) and the burner hearth (3) that comprise the inner chamber filling ferric oxide sphere of powder (12), it is characterized in that shaft (1) lumen centers has a central cylinder (2), vacuum fan is connected by pipe connecting (8) in central cylinder (2) lower end; Burner hearth (3) is distributed in around the periphery, middle part of shaft (1).

2. washed coal negative pressure sintering oven according to claim 1 is characterized in that central cylinder (3) top than the low one section virtual height in shaft (1) top, and foot is extracted out in making combustion gas flow into central cylinder.

3. washed coal negative pressure sintering oven according to claim 1 and 2 is characterized in that periphery, shaft (1) middle part 10-30 the burner hearth (3) that distributing.

4. washed coal negative pressure sintering oven according to claim 3 is characterized in that fixing a platform (4) in shaft (1) periphery of burner hearth (3) below.

5. washed coal negative pressure sintering oven according to claim 1 is characterized in that shaft (1) lower part outlet (7) located ring-type cooling water cavity (5).