阅读说明：本技术 硅热法冶镁还原炉炉前除尘装置 (Stokehole dust removal device for magnesium smelting reduction furnace by silicothermic process ) 是由 赵校军 李连杰 周远富 俞立锋 魏玉周 陈刚 邢维旦 刘衍辉 于 2018-07-25 设计创作，主要内容包括：一种硅热法冶镁还原炉炉前除尘装置,包括可移动的除尘机构及架设于还原炉上方的吸尘机构,还原炉内装有若干卧式还原罐,所述除尘机构包括过滤箱及安装在过滤箱上的进气管及排气管,所述吸尘机构包括吸尘罩及与吸尘罩连通的集气管,所述集气管与进气管可拆卸连接,所述吸尘罩包括对称设置的第一吸尘罩及第二吸尘罩,所述第一吸尘罩及第二吸尘罩分别可转动地安装于还原罐端口的前方,该除尘装置结构紧凑,除尘效果好,有助于环境保护。(The utility model provides a silicothermic process smelts magnesium reduction furnace stokehold dust collector, includes mobilizable dust removal mechanism and erects the dust absorption mechanism in the reduction furnace top, is equipped with a plurality of horizontal reduction jars in the reduction furnace, dust removal mechanism includes the rose box and installs intake pipe and the blast pipe on the rose box, dust absorption mechanism includes suction hood and the discharge that communicates with the suction hood, the connection can be dismantled with the intake pipe to the discharge, the suction hood is including the first suction hood and the second suction hood that the symmetry set up, first suction hood and second suction hood are rotationally installed in the place ahead of reduction jar port respectively, and this dust collector compact structure, dust removal effect is good, helps environmental protection.)

1. A stokehold dust collector of silicothermic magnesium reduction furnace for get rid of the smoke and dust before the reduction furnace, be equipped with the horizontal reduction jar that a plurality of has circular port in the reduction furnace, the reduction jar extends upward at the port rear and is equipped with vacuum tube, dust collector includes mobilizable dust removal mechanism and erects the dust absorption mechanism in reduction jar top, dust removal mechanism includes the rose box and installs intake pipe and the blast pipe on the rose box, dust absorption mechanism is including being located the suction hood in port the place ahead and the discharge tube that communicates with the suction hood, its characterized in that: the dust hood comprises a first dust hood and a second dust hood which are symmetrically arranged, the first dust hood and the second dust hood are rotatably arranged in front of the port of the reduction pot respectively, and arc-shaped openings are formed in the first dust hood and the second dust hood in the vertical direction respectively.

2. The stokehole dust collector of the silicothermic magnesium-smelting reduction furnace of claim 1, wherein: the arc-shaped openings of the first dust hood and the second dust hood are combined to form a continuous semicircle when being closed, and the vacuum tube of the reduction tank can pass through the middle of the first dust hood and the second dust hood when the arc-shaped openings of the first dust hood and the second dust hood are separated.

3. The stokehole dust collector of the silicothermic magnesium-smelting reduction furnace of claim 1, wherein: the first dust hood and the second dust hood respectively comprise a base part with an arc-shaped opening and a switching part extending from the base part to the rear of the reduction tank, and the switching part is of a hollow tubular structure and is communicated with the inside of the base part.

4. The stokehole dust collector of the silicothermic magnesium-smelting reduction furnace of claim 3, wherein: the gas collecting pipe is provided with a pair of telescopic sleeves corresponding to the reduction tanks respectively, and the switching part can be inserted into the telescopic sleeves.

5. The stokehole dust collector of the silicothermic magnesium-smelting reduction furnace of claim 4, wherein: the telescopic tube is provided with an L-shaped plug connector.

6. The stokehole dust collector of the silicothermic magnesium-smelting reduction furnace of claim 4, wherein: the first dust collection cover and the second dust collection cover are respectively provided with an operating handle which protrudes forwards, the base parts of the first dust collection cover and the second dust collection cover can be respectively rotated along the vertical direction by grasping the operating handle, and the first dust collection cover and the second dust collection cover can be pulled out from the telescopic sleeve along the horizontal direction.

7. The stokehole dust collector of the silicothermic magnesium-smelting reduction furnace of claim 1, wherein: the port of the reduction pot is ring-shaped with an inner diameter and an outer diameter, and the radius of the arc-shaped opening is larger than the inner diameter of the port of the reduction pot and smaller than the outer diameter of the port.

8. The dust removing device in front of the silicothermic magnesium smelting reduction furnace according to any one of claims 1 to 7, wherein: the upper end of the vacuum-pumping pipe is provided with a telescopic flexible connecting pipe, and the flexible connecting pipe is connected with the vacuum pipe through a flange.

9. The dust removing device in front of the silicothermic magnesium smelting reduction furnace according to any one of claims 1 to 7, wherein: the dust removal mechanism is characterized in that a funnel-shaped dust collection part is arranged below a filter box of the dust removal mechanism, a discharge port is formed in the lower end of the dust collection part, and the filter box is fixedly installed on a trolley with rollers through a support.

Technical Field

The invention relates to the field of metal smelting auxiliary equipment, in particular to a dust removal device used in front of a reduction furnace for smelting magnesium by a silicothermic process.

Background

The silicothermic process is the main method for smelting magnesium at present, and the common method for reducing magnesium by the process comprises the steps of mixing calcined dolomite obtained by calcining dolomite with ferrosilicon and fluorite according to a proportion, finely grinding and pelletizing, putting the pelletized pellets into a reduction tank of a reduction furnace, a plurality of reduction tanks are arranged in the reduction furnace, the tank bodies of the reduction tanks are arranged in the reduction furnace, the tank openings extend out of the furnace front position outside the reduction furnace, then the reduction tank is sealed and vacuumized, the reduction tank is heated to over 1200 ℃ by a reduction furnace, the ferrosilicon is reduced and calcined under the condition of vacuum high temperature to generate magnesium vapor, the generated magnesium vapor escapes to the tank opening under the action of a vacuum system, a cooling water jacket is arranged near the tank opening, the magnesium vapor reaches the cooling water jacket and is condensed to form crystallized magnesium, after the reduction is finished, opening the reduction tank to take out the crystallized magnesium from the reduction tank for further refining, cleaning the reducing slag in the reduction tank, and then filling new raw materials for the next production cycle.

A large amount of smoke and dust are generated in the processes of opening the reduction tank to obtain the crystallized magnesium, slagging off and loading, so that the working and surrounding environments are seriously polluted, the working environment is severe, and the physical health of workers is influenced. For this reason, those skilled in the art have developed dust-removing devices for use in mechanical slag-raking and charging equipment, such as: the dust removal device of the vacuum smelting reduction magnesium combined operation vehicle disclosed by the Chinese patent CN201520709012.1 is provided with a dust removal tank, the top of the dust removal tank is provided with a dust removal device with one end sealed and the other end communicated with a filter pipe of a draught fan, the device can be arranged in front of a reduction furnace for dust removal, but inevitably occupies the operation space in front of the furnace, so that the operation and dust removal in front of the furnace are difficult to be carried out simultaneously. According to the central dust removal station dust removal system of the magnesium metal smelting reducing slag high-pressure slagging-off and charging system disclosed by the Chinese patent CN201410632709.3, although the main facility is arranged at a position far away from the front of the reducing furnace, a vehicle-mounted dust hood is left in front of the reducing furnace, and the occupied space in front of the reducing furnace cannot be completely eliminated. The problems that the operation is complicated due to the intermittent movable dust hood, the investment is large due to the fact that a central dust removal station dust removal system needs to be arranged on each reduction furnace, and the like exist.

In view of the above, it is necessary to design a dust removing device in front of a reduction furnace for smelting magnesium by a silicothermic process to solve the above problems.

Disclosure of Invention

The invention aims to provide a stokehole dust removal device of a silicothermic magnesium smelting reduction furnace, which has a reasonable structure, is safe and reliable.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a front dust removal device of a magnesium smelting reduction furnace by a silicothermic process is used for removing smoke dust in front of the reduction furnace, a plurality of horizontal reduction tanks with round ports are arranged in the reduction furnace, a vacuum tube extends upwards behind the ports of the reduction tanks, the dust removal device comprises a movable dust removal mechanism and a dust collection mechanism erected above the reduction tanks, the dust removal mechanism comprises a filter box, an air inlet tube and an air outlet tube, the air inlet tube and the air outlet tube are mounted on the filter box, the dust collection mechanism comprises a dust hood and a gas collecting tube communicated with the dust hood, the dust hood comprises a first dust hood and a second dust hood which are symmetrically arranged, the first dust hood and the second dust hood are respectively and rotatably mounted in front of the ports of the reduction tanks, and arc-shaped openings are respectively formed in the vertical direction of the first dust hood and the second dust hood.

Furthermore, the arc-shaped openings of the first dust hood and the second dust hood are combined to form a continuous semicircle when being closed, and the vacuum tube of the reduction tank can pass through the middle of the first dust hood and the second dust hood when the arc-shaped openings of the first dust hood and the second dust hood are separated.

Furthermore, the first dust hood and the second dust hood respectively comprise a base part with an arc-shaped opening and a switching part extending from the base part to the rear part of the reduction tank, and the switching part is of a hollow tubular structure and is communicated with the inside of the base part.

Furthermore, the gas collecting pipe is provided with a pair of telescopic sleeves corresponding to the reduction tanks respectively, and the switching part can be inserted into the telescopic sleeves.

Further, the telescopic tube is provided with an L-shaped plug connector.

Furthermore, the first dust hood and the second dust hood are respectively provided with an operating handle which protrudes forwards, the base parts of the first dust hood and the second dust hood can be respectively rotated along the vertical direction by grasping the operating handle, and the first dust hood and the second dust hood can be pulled out from the telescopic sleeve along the horizontal direction.

Further, the port of the reduction tank is ring-shaped having an inner diameter and an outer diameter, and the radius of the arc-shaped opening is larger than the inner diameter of the port of the reduction tank and smaller than the outer diameter of the port.

Furthermore, a telescopic flexible connecting pipe is installed at the upper end of the vacuum pipe, and the flexible connecting pipe is connected with the vacuum pipe through a flange.

Furthermore, a funnel-shaped dust collecting part is arranged below a filter box of the dust removing mechanism, a discharge port is arranged at the lower end of the dust collecting part, and the filter box is fixedly installed on a trolley with rollers through a support.

Compared with the prior art, the front dust removal device for the magnesium smelting reduction furnace by the silicothermic process disclosed by the invention has a compact and reasonable structure, can effectively remove smoke dust generated by the reduction tank, and does not occupy the operation space in front of the reduction furnace.

Drawings

FIG. 1 is a schematic front view of a dust removing device in front of a reduction furnace for smelting magnesium by a silicothermic process according to the present invention.

FIG. 2 is a partial side view of a dust removing apparatus in front of the silicothermic magnesium reduction furnace shown in FIG. 1.

Fig. 3 is a front view of the dust removing mechanism shown in fig. 1.

Fig. 4 is a front view of the first dust extraction hood of fig. 1.

Fig. 5 is a right side view of the first dust extraction hood of fig. 4.

Fig. 6 is a front view of the second dust collection cover shown in fig. 1.

Fig. 7 is a right side view of the second dust collection cover shown in fig. 6.

Figure 8 is a front elevational view of the alternative operating condition of the suction mechanism shown in figure 1.

Detailed Description

The dust removing device 1000 in front of the silicothermic magnesium smelting reduction furnace according to the present invention will be further described with reference to the attached drawings 1 to 7. In the case of silicothermic smelting of magnesium, it is common to place several horizontal reduction tanks 30 side by side in a reduction furnace (not shown) and calcine them at high temperature to allow the minerals containing metallic magnesium to react chemically in the reduction tanks sufficiently. The reduction tank 30 has a circular port 302 and a sealing cover 301 for sealing the port 302, the port 302 is in the shape of a ring with a certain width, i.e., has an inner diameter and an outer diameter in the vertical direction, and the outer diameter of the sealing cover 301 is smaller than the inner diameter of the port 302. In addition, the vacuum-pumping pipe 33 which penetrates through the interior of the reduction tank 30 and vertically extends upwards is arranged at a position slightly behind the port 302 of the reduction tank 30, so that the interior of the reduction tank 30 is vacuumized, which is beneficial to fully extracting metal magnesium from mineral substances, and when a cover is opened, such as taking crystallized magnesium, slagging off and charging, the port 302 generates a large amount of smoke dust, which is not beneficial to environmental protection. In view of the above, the dust removing apparatus 1000 in front of the reduction furnace for smelting magnesium by silicothermic process according to the present invention is used for removing the above-mentioned smoke generated in front of the reduction furnace and from the reduction tank, so as to protect the environment and the health of the operating workers.

The vacuumizing pipe 33 is connected to the branch pipe 31 of the vacuumizing system 310 through the flexible connecting pipe 32, the reduction tank 30 is deformed and damaged after being calcined for many times, and at this time, a new reduction tank 30 needs to be replaced, therefore, the vacuumizing pipe 33 and the flexible connecting pipe 32 are preferably connected by a flange and sealed by a sealing ring (not shown), and the vacuumizing pipe 33 is conveniently detached from the flexible connecting pipe 32 when the connection is required to be detached on the premise of ensuring the connection tightness.

The stokehole dust removal device 1000 for the magnesium smelting reduction furnace by the silicothermic process comprises a movable dust removal mechanism 20 and a dust collection mechanism 10 erected above a plurality of reduction tanks 30, wherein the dust removal mechanism 20 comprises a filter box 24, and an air inlet pipe 21 and an air outlet pipe 22 which are arranged on the filter box 24; the dust collection mechanism 10 includes dust hoods 100 located above the reduction tanks 20 and a gas collecting pipe 120 communicated with the dust hoods 100, one end of the gas collecting pipe 120 is detachably connected to the air inlet pipe 21, and the other end of the gas collecting pipe 120 is provided with a plurality of branches and is finally communicated with the dust hoods 100.

The dust hood 100 includes a first dust hood 11 and a second dust hood 41 symmetrically disposed, the first dust extraction hood 11 includes a base 111 having an arc-shaped opening 110 formed downward in a vertical direction, and an adapter 112 extending from the base 111 toward the rear of the reduction tank 30, the adapter 112 having a hollow tubular structure and penetrating the inside of the base 111, the adapter 112 is detachably connected with the gas collecting pipe 120, and preferably, a telescopic sleeve 12 is arranged between the gas collecting pipe 120 and the adapter 112, the telescopic tube 12 has an L-shaped plug 121, one end of the telescopic tube 12 is integrated with the gas collecting tube 120, the opening shape of the L-shaped plug 121 connected to the other end is similar to the opening of the adapter 112, so as to be removably and tightly coupled to the adapter 112, the opening of the adapter 112 is preferably conical and can be inserted into the telescopic tube 12.

Similarly, the second dust hood 41 includes a base 411 having an arc-shaped opening 410 in a vertical direction, and an adapter 412 extending from the base 411 to the rear of the reduction tank 30, wherein the adapter 412 is a hollow tubular structure and is communicated with the inside of the base 411, and the adapter 412 is detachably connected to the gas collecting pipe 120. As shown in fig. 8, the base portions 111,411 of the first dust hood 11 and the second dust hood 41 are respectively rotatable around the adapter portions 112,412 thereof, that is, the first dust hood 11 and the second dust hood 41 are respectively rotatably mounted in front of the port 302 of the reduction pot 30, so that when the reduction pot 30 needs to be withdrawn from the reduction furnace, the vacuum pipe 33 can pass through the middle of the first dust hood 11 and the second dust hood 41 after rotating the first dust hood 11 and the second dust hood 41 in opposite directions. The first dust hood 11 and the second dust hood 41 are respectively provided with an operating handle 113,413 protruding forwards, the base parts 111 and 411 of the first dust hood 11 and the second dust hood 41 can be respectively rotated in the vertical direction by grasping the operating handle 113,413, and the first dust hood 11 and the second dust hood 41 can be pulled out from the telescopic pipe 12 in the horizontal direction.

The base parts 111 and 411 are hollow box-shaped, the arc-shaped opening 110 and the arc-shaped opening 410 are arranged opposite to each other and respectively have a quarter arc length, the radius of the arc-shaped opening 110 and the arc-shaped opening 410 is larger than the inner diameter of the port 302 of the reduction tank 30 and smaller than the outer diameter of the port 302, when the first dust hood 11 and the second dust hood 41 are combined and close together, the arc-shaped opening 110 and the arc-shaped opening 410 are combined into a semicircle with a downward opening, and are used for sucking smoke dust overflowing from the port 302, and transmitting the smoke dust to the gas collecting pipe 120 through the respective adapter parts 112 and 412, and finally transmitting the smoke dust to the dust removing mechanism 20 for.

The lower end of the filter box 24 of the dust removing mechanism 20 is provided with a funnel-shaped dust collecting part 25, the lower end of the dust collecting part 25 is provided with a discharge port 251, the filter box 24 is fixedly arranged on a trolley 26 with a roller 261 through a bracket 232, and the dust removing mechanism 20 can be switched to use as required. The dust removing mechanism 20 further comprises an induced draft fan 23 fixed on the filter box 24, an air outlet end of the induced draft fan 23 is communicated with an exhaust pipe 22, an air inlet end of the induced draft fan 23 is communicated with the upper part of the filter box 24 through an adapter tube 231, a plurality of layers of filter screens (not shown) are arranged in the filter box 24, smoke dust is transmitted to an air inlet pipe 21 of the dust removing mechanism 20 through a gas collecting pipe 120 of the dust collecting mechanism 10 and enters the filter box 24, particulate matters in the smoke dust are adsorbed and retained in the filter box 24 under the filtration of the filter screens and are finally collected through a horn-shaped integration part 25 and then uniformly discharged from a discharge port 251, and clean and filtered gas is discharged to the atmosphere from the exhaust pipe 22, if the function of removing toxic gas is added to the filter screen, the health of the workers can be ensured.