CN1199778A

CN1199778A - Metallurgical slag granulator

Info

Publication number: CN1199778A
Application number: CN98106855A
Authority: CN
Inventors: 奥里根斯基·费·雅; 斯维林·瓦·瓦; 哈比布林·拉·米; 巴斯特雷金·谢·谢; 牟行余; 王小功
Original assignee: Baotou Iron & Steel Design Inst Ministry Of Metallurgical Industry
Current assignee: Baotou Iron & Steel Design Inst Ministry Of Metallurgical Industry
Priority date: 1998-04-14
Filing date: 1998-04-14
Publication date: 1998-11-25
Anticipated expiration: 2018-04-14
Also published as: CN1058526C

Abstract

The metallurgical slag granulator includes slag chute, granulating device, drum with strainer, water circulation system and slag discharger. The granulating device granulates slag mechanically. The present invention has short technological path, simple structure, powerful slag processing capacity; low water consumption and lower power consumption.

Description

Metallurgical slag granulator

The invention belongs to the metallurgical cinder technical field, particularly relate to a kind of slag granulated processed device.

Modern slag treatment; generally all adopt in stokehold shrend granulation; after dewatering, export with conveyor; disclosed russian patent N.1181530; " metallurgical slag granulating device "; as shown in Figure 1; molten slag flows out from blast furnace residue channel, enters granulating unit 2 through chute 1, and the high-pressure cooling water of supplying with water circulation system contacts; the slag quenching is broken into particulate; the pulp water miscellany is pooled to slag-storing bucket 3, and the pulp water miscellany inflow length of discharging from slag-storing bucket 3 is the rotary drum 4 of the rotation about 6 meters, and the dividing plate pan 6 in rotary drum 4 is mentioned dehydration from rotary drum 4 bottoms; slag after the dehydration transports through the rotary conveyor 13 that level stretches into rotary drum, and then transports to the slag field.

Above-mentioned metallurgical slag granulating device, it is big to adopt the water quenching granulated slag to consume quantity of circulating water, and slag per ton needs the about 8～10m/t slag of recirculated water, and strict to the slag temperature requirement of handling, if temperature drift easily produces foamy slag, temperature is on the low side, and the slag caking is difficult for fragmentation; Simultaneously, if tramp metal iron in the slag is fallen when slag on the equipment of water flushing, metallic iron forms inaccessible hydrospace on its surface, flash evapn at high temperature, thus set off an explosion.

Above-mentioned metallurgical slag granulating device, its rotary drum is long, is generally about 6 meters, and therefore the conveyor horizontal direction distance of transportation slag is big from rotary drum, causes the inconvenience of rotary drum repair and maintenance, and weight of equipment is big.

The objective of the invention is to overcome the deficiency of said apparatus, and provide that a kind of technical process is short, simple in structure, the metallurgical slag granulator of water-saving, safety, reliable operation.

Task of the present invention is finished by following approach, and metallurgical slag granulator comprises pelletizer, slag chute, the rotary drum that filter screen is arranged, water circulation system and slag discharging device.The length of changeing fermented soya beans, salted or other wise is less than its diameter; the dividing plate pan is arranged on the rotary drum; be used to mention grain slag and dehydration; the chute outlet is stretched in the shell that has chimney; the pelletizer setting in the enclosure with the distance of rotary drum to guarantee that grain slag can flow in the rotary drum chamber; overflow device is housed below the rotary drum in the enclosure, and it links to each other with water storage tank, and the strength lifting device that can rise to the tiny slag particle that flows into water storage tank rotary drum is housed in the water storage tank.Between shell and rotary drum liner is housed, it is flanged coaxial two end ring, rotary drum can be in its chamber and with the axle rotation of its cross section perpendicular, connecting rod one end is fixed on the axle, the other end is fixed on the roller that can move by liner.

The dividing plate pan of rotary drum has the slit along its width, and with the rotation of rotary drum, the slag that the dividing plate pan will be mentioned fully dewaters.

The length of changeing fermented soya beans, salted or other wise is more than or equal to 1/3rd of its diameter, smaller or equal to 1/2nd of its diameter.

Stretch into the grain slag that receives in the rotary drum chamber after the dehydration of falling down from the rotary drum top from the device slant chute upper end that rotary drum is discharged grain slag, the end of slant chute is above the rotary conveyor of shell outside.

Pelletizer the place ahead is fixed with the inclination skimming plate in the rotary drum chamber, is used for water spray refrigerative grain slag after the granulation is blocked and drop to the bottom of the drum.

On the outer side wall of rotary drum brush is housed.

Beneficial effect of the present invention is:

This metallurgical slag granulator; adopt the pelletizer mechanical disintegration slag of rotation; can not only guarantee the quality of grain slag; and slag energy economized cycle water 5～7m/t slag per ton; significantly reduced power charge; processing power is strong; be not subjected to slag temperature drift or influence on the low side; the grain slag of mechanical disintegration is fallen into rotary drum again after the water spray cooling, also can not produce blast even be mingled with metal; because injection flow rate is little; the grain slag temperature is higher, can lean on self temperature further dry in the process of transporting, so the grain slag water content is low.

The pelletizer of this metallurgical slag granulator, rotary drum all are arranged in the shell that has chimney; compact construction; the water vapor, the flue gas that produce in granulation and the transportation can be concentrated by chimney and discharged; reduce environmental pollution; fully satisfy environmental requirement, rotary drum length is little, and it is inner, and only a slant chute need be set just can transport rotary drum to grain slag; slant chute is simple in structure, stable, is convenient to Maintenance and Repair.

This metallurgical slag granulator; the tiny slag particle that utilizes strength lifting device will be deposited on water tank bottom in water storage tank promotes and turns back to dehydration discharge in the rotary drum; recirculated water is fully purified, thereby improve the life-span of water circulating pump, thoroughly solved a short difficult problem of water circulating pump life-span.

Fig. 1 is a russian patent N1181530 synoptic diagram;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is that Fig. 2 is along the A-A sectional view;

Fig. 4 is that Fig. 2 is along the B-B sectional view;

Fig. 5 is Fig. 2 I partial enlarged drawing.

Most preferred embodiment of the present invention is:

A kind of metallurgical slag granulator; pelletizer 2 and rotary drum 4 compact arrangement are in the shell 5 that has chimney 23; the outlet section of chute 1 is gone into the front upper place of pelletizer 2 in the shell 5 second month in a season; directly smelt the high-temperature slag of discharging the unit from blast furnace or other; supply with the pelletizer 2 of its outlet below by chute 1; the rotating speed of pelletizer 2 is 60～80 rev/mins; slag contacts with the working face collision of the pelletizer 2 of rotation; mechanicalness is ground into grain slag; by the cooling of water circulation system water spray; grain slag falls into the overflow water of rotary drum 4 bottoms, cools off granulation once more.Under the driving of drive unit; rotary drum 4 in its chamber and perpendicular to section the axle 7 the rotation; connecting rod 8 one ends are fixing with axle 7; the other end is fixed on the roller 9 that can move by liner 10; on the wall of rotary drum 4, evenly arrange eight dividing plate pans 6; the quantity of other situation lower clapboard pans 6 can increase and can subtract; each dividing plate pan 6 is converted into the obtuse angle and forms, its width be the flow direction of grain slag slit 19 is arranged in case dividing plate pan 6 along with the rotation of rotary drum 4 with grain slag dehydration when mention rotary drum 4 bottoms.

The outer wall of rotary drum 4 is equipped with brush 11, is convenient to clean rotary drum 4, is fixed with the skimming plate 20 that tilts to pelletizer 2 in the chamber of rotary drum 4, and skimming plate 20 is a thin plate, is convenient to granulation, refrigerative grain slag blocked drop to rotary drum 4 bottoms.

Overflow device 16 is installed below the rotary drum in shell 5, according to entering what of rotary drum 4 quantity of slag, regulate overflow device 16, thereby guarantee the water yield of rotary drum 4 bottom necessity, water storage tank 15 communicates with shell 5 through overflow device 16, when drum rotating dehydration surpasses water level shell 5 in to require, by overflow device 16 inflow water storage tanks 15.In water storage tank 15, be separately installed with the dam plate 22 that exceeds the water surface near overflow device 16; strength lifting device 14 and water level regulator 12; when recirculated water when water storage tank 15 flows into cleaned water tanks 21; the thin slag particle that dam plate 22 blocks 15 li suspensions of water storage tank flows into cleaned water tank 21; strength lifting device 14 can be mentioned the thin slag particles in the water storage tank 15 and being turned back in the rotary drum 4 dehydration and discharge; water level regulator 12 links with water supply outer net pressure measuring system water source; the control replenishment cycles water yield; the grain slag water spray cooling of cleaned water tank 21 and after pulverizing to pelletizer 2; be to realize, also can keep simultaneously the water level of the necessity in the shell 5 of rotary drum 4 by water pump 18 and connecting tube 17.

The device of discharging grain slag from rotary drum 4 has slant chute 13 and rotary conveyor 24; the grain slag after the dehydration of accepting in the rotary drum to fall down from rotary drum 4 tops is stretched in slant chute 13 upper ends; its end extends to rotary drum 4 and shell 5 outside rotary conveyors 24 tops; so that the grain slag after the dehydration is transported to the slag field; the angle that slant chute 13 is tilted should be enough to make grain slag to lean on self gravitation to fall along slant chute 13, and the angle of inclination generally is not less than 40 °.

The workflow of metallurgical slag granulator is: metallurgical cinder flows to the pelletizer 2 of rotation along chute 1; contact mechanical disintegration with the working face of pelletizer 2 and become grain slag; behind the skimming plate 20 of water flushing, fall in the bottom enclosure 5 of rotary drum 4 of certain water level and cool off fragmentation once more; the grain slag of band water is mentioned along with rotary drum 4 rotary dehydrations by dividing plate pan 6 from rotary drum 4 bottoms of rotation; water is discharged to overflow device 16 through the slit 19 of dividing plate pan 6; grain slag after the dehydration is fallen an end and is stretched in the slant chute 13 in rotary drum 4 chambeies from the top of rotary drum 4; transport to slag field or elsewhere through rotary conveyor 24; supplied with by cleaned water tank 21 at recirculated water or replenishment cycles water that granulating needs, gas mixture such as steam that forms in the grain slag transportation and flue gas are discharged by the chimney on the shell 5 23.

Claims

1; a kind of metallurgical slag granulator; comprise slag chute [1]; pelletizer [2]; the rotary drum [4] that filter screen is arranged; water circulation system and slag discharging device; it is characterized in that: pelletizer [2] and rotary drum [4] compact arrangement are in shell [5]; the oblique upper of the interior pelletizer of shell [5] [2] is stretched in chute [1] outlet; the length of changeing fermented soya beans, salted or other wise [4] is less than its diameter; dividing plate pan [6] is arranged on the rotary drum [4]; overflow device [16] is installed in rotary drum [4] bottom enclosure [5]; it links to each other with water storage tank [15]; between shell [5] and rotary drum [4], liner [10] is housed; rotary drum [4] in its chamber and with its cross section perpendicular the axle [7] rotation; connecting rod [8] one ends are fixed on the axle [7], and the other end is fixed on can be by on the mobile roller [9] of liner [10].

2, metallurgical slag granulator according to claim 1 is characterized in that: the length of changeing fermented soya beans, salted or other wise [4] is more than or equal to 1/3rd of its diameter, smaller or equal to 1/2nd of its diameter.

3, metallurgical slag granulator according to claim 1 is characterized in that: the rotating speed of pelletizer [2] is 60～80 rev/mins.

4, according to the metallurgical slag granulator shown in the claim 1, it is characterized in that: rotary drum [4] internal fixing has skimming plate [20], and this skimming plate [20] is a thin plate, and corresponding pelletizer [2] tilts.

5, metallurgical slag granulator according to claim 1 is characterized in that: dividing plate pan [6] is provided with the slit [19] along its width.

6, metallurgical slag granulator according to claim 1; it is characterized in that: slag discharging device comprises slant chute [13] and rotary conveyor [24] from rotary drum [4]; slant chute [13] upper end is stretched in the rotary drum [4], and its lower end extends to the outer belt conveyor of shell [5] [24] oblique upper.

7, metallurgical slag granulator according to claim 1 is characterized in that: steering gear [10] is flanged co-axial two end ring.

8, metallurgical slag granulator according to claim 1 is characterized in that: the dam plate [22], strength lifting device [14] and the water level regulator [12] that exceed the water surface are housed in water storage tank [15].