Device for trapping antimony and gold from blast furnace slag

Abstract

The utility model discloses a device for capturing antimony and gold from blast furnace slag. The device comprises a high-pressure nitrogen bag, a pressure reducing valve, a high-temperature ceramic tube, a heat-preservation blast furnace front bed, a high-temperature heat-preservation bag, an electric hoist, an electric induction furnace, a capturing agent metering storage cylinder, a cooler, a dust collector and a matte ingot mold. The device is used for treating blast furnace slag to recover antimony and gold, the heating and stirring characteristics of an electric induction furnace are utilized, assistance stirring of high-pressure nitrogen is fused, a capturing agent is added into the slag to capture antimony and gold, most of the antimony and gold are recycled in matte, and a small part of the antimony and gold is volatilized and then is recycled after cooling and dust collection. The device disclosed by the utility model is suitable for trapping valuable metals in the slag, and is particularly suitable for trapping and recycling valuable metals such as antimony and gold in the slag of an antimony smelting blast furnace. When the device is used for treating the blast furnace slag, the antimony and gold catching agent can be well and rapidly added into the molten blast furnace slag through the electric induction effect, antimony and gold can be rapidly caught, and the content of antimony and gold in the slag can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting, in particular to a device for capturing antimony and gold from blast furnace slag. Background Art

[0002] China is a major producer of antimony. Most enterprises adopt the process of volatilizing and oxidizing to produce antimony oxide in blast furnaces. During the process of producing antimony oxide, coking coal is heated, and iron ore and lime are added to form slag. For every 1 ton of antimony oxide produced, nearly 2 tons of blast furnace slag will be produced. Under normal circumstances, the antimony content in the slag is about 1.5%. In the raw ore we produce, the antimony content is only about 1.6% - 1.8%. Obviously, a large amount of antimony is lost from the slag, seriously affecting the economic benefits of antimony enterprises. For this reason, some domestic enterprises have conducted research on the recovery of antimony from slag. Starting from mineral processing, various flotation methods have been studied, but the effect is poor. Then, research was carried out from the perspective of smelting. Using the reduction method and using iron powder with good activity as a reducing agent, the purpose was to reduce and recover the oxides therein. The results showed that there was almost no effect. The redox method has also been used. First, the metals therein are oxidized to increase the concentration of oxides, and then better reduction and sedimentation are carried out, still without effect. Therefore, for a long time, there has been no method to reduce the antimony content in blast furnace slag. Reducing antimony in blast furnace slag is a major problem and a headache in the antimony smelting industry. There are also no more reports in this regard at home and abroad. Content of the Utility Model

[0003] The purpose of the utility model is to provide a device for capturing antimony and gold from blast furnace slag in view of the deficiencies of the prior art, so as to solve the problems raised in the background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A device for capturing antimony and gold from blast furnace slag, including a high-pressure nitrogen gas package, a pressure reducing valve, a high-temperature ceramic tube, a heat-insulated blast furnace forehearth, a high-temperature heat-insulated package, an electric hoist, an induction electric furnace, a capture agent metering storage tank, a cooler, a dust collector, and an ice copper ingot mold. The high-pressure nitrogen gas package is connected to one end of the pressure reducing valve through a pressure-resistant pipe, and the other end of the pressure reducing valve is connected to the high-temperature ceramic tube through a pressure-resistant pipe. The gas outlet end of the high-temperature ceramic tube is placed in the furnace cavity of the induction electric furnace;

[0005] A high-temperature heat-insulated package is arranged at the discharge port of the heat-insulated blast furnace forehearth. The high-temperature heat-insulated package is suspended on the electric hoist, and the left side of the high-temperature heat insulation is connected to the slag discharge channel of the heat-insulated blast furnace forehearth;

[0006] The capture agent metering storage tank is located on the upper right side of the induction electric furnace; the cooler is located above the induction electric furnace, and the cooler is connected to the dust collector;

[0007] The ice copper ingot mold is located at the lower right front of the induction electric furnace, and the ice copper ingot mold is connected to the ice copper outlet channel of the induction electric furnace.

[0008] Preferably, the high-pressure nitrogen gas package is located on the left side of the induction electric furnace, the forehearth of the heat-insulating blast furnace is located behind the high-pressure nitrogen gas package, the high-temperature heat-insulating package is located at the slag outlet on the right side of the forehearth of the heat-insulating blast furnace, and the electric hoist is located above the high-temperature heat-insulating package.

[0009] Preferably, the high-temperature heat-insulating package includes a shell and a heat-insulating rock wool board, wherein the shell is made of refractory bricks, and the heat-insulating rock wool board covers the outer side wall of the shell.

[0010] Preferably, the forehearth of the heat-insulating blast furnace is a cube or cuboid refractory brick furnace for heat preservation and clarification after the blast furnace slag flows out of the blast furnace slag channel, and has a slag outlet, a matte outlet and an antimony matte outlet.

[0011] Preferably, the high-temperature ceramic tube adopts a corundum ceramic tube.

[0012] Preferably, the capture agent metering storage tank is a conical steel hopper, which has a discharge valve and a cover, and is used for the storage and metering of the capture agent.

[0013] Preferably, the induction electric furnace is an intermediate frequency induction electric furnace, which has a matte outlet and a slag outlet on the bottom side, an open upper part, and an external heat-insulating steel shell.

[0014] Preferably, the cooler is an M-type steel pipe cooler, the connecting opening of which is located above the open mouth of the induction electric furnace, is larger than the open mouth of the induction electric furnace, and can move left and right, and is used for cooling high-temperature flue gas dust.

[0015] Preferably, the dust collector is a high-temperature resistant bag dust collector, which is used for collecting soot.

[0016] Preferably, the matte ingot mold is a cast iron steel mold, which is used for collecting the valuable metal antimony-gold matte captured.

[0017] Compared with the prior art, the present utility model provides a device for capturing antimony and gold from blast furnace slag, and successfully realizes the efficient recovery and utilization of valuable metals antimony and gold in blast furnace slag. It has the following beneficial effects:

[0018] 1. The device of the present utility model processes blast furnace slag, can well add the antimony and gold capture agent into the molten blast furnace slag quickly through electromagnetic induction, quickly capture antimony and gold, and can reduce the content of antimony and gold in the slag;

[0019] 2. The device of the present utility model realizes the automatic stirring under electromagnetic induction of high-temperature molten slag, strengthens the reaction process, and has a safe and reliable environment, and is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0021] Reference Numerals: 1 high-pressure nitrogen gas package, 2 pressure reducing valve, 3 high-temperature ceramic tube, 4 heat-insulated blast furnace forehearth, 5 high-temperature heat-insulated package, 6 electric hoist, 7 induction furnace, 8 capture agent metering storage tank, 9 cooler, 10 dust collector, 11 matte ingot mold. Detailed Implementation Manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0023] As Figure 1 shown, a device for capturing antimony and gold from blast furnace slag in this embodiment includes a high-pressure nitrogen gas package 1, a pressure reducing valve 2, a high-temperature ceramic tube 3, a heat-insulated blast furnace forehearth 4, a high-temperature heat-insulated package 5, an electric hoist 6, an induction furnace 7, a capture agent metering storage tank 8, a cooler 9, a dust collector 10, and a matte ingot mold 11. The high-pressure nitrogen gas package 1 is located on the left side of the equipment, and the nitrogen gas outlet is connected to the inlet of the pressure reducing valve 2; the inlet of the pressure reducing valve 2 is connected to the nitrogen gas outlet of the high-pressure nitrogen gas package 1 through a pressure-resistant metal hose, and the outlet is connected to the high-temperature ceramic tube 3 through a pressure-resistant metal hose; the heat-insulated blast furnace forehearth 4 is located behind the high-pressure nitrogen gas package 1, and its slag outlet is located on the right side; the high-temperature heat-insulated package 5 is located on the right side of the heat-insulated blast furnace forehearth 4, and the slag of the heat-insulated blast furnace forehearth 4 is put into the high-temperature heat-insulated package 5 through a high-temperature slag passage; the electric hoist 6 is connected to the high-temperature heat-insulated package 5 through its hook to move the hot melt slag into the induction furnace 7; the induction furnace 7 is located on the right side of the high-pressure nitrogen gas package 1 and in front of the high-temperature heat-insulated package 5, and its upper open mouth is connected to the cooler 9; the capture agent metering storage tank 8 is located on the right side of the induction furnace 7, and the capture agent is metered and then put into the induction furnace 7 through a pipeline; the high-temperature ceramic tube 3 is located on the left side of the induction furnace 7. After the molten slag and the capture agent are put into the induction furnace 7 and heated, nitrogen gas is blown in for intensive stirring. After the reaction is completed, it is extracted, and then the pressure reducing valve 2 is closed;

[0024] The cooler 9 is located above the open mouth of the induction furnace 7, and its connection port is slightly larger than the open mouth of the induction furnace 7 and can move left and right. It is opened before the induction furnace 7 works and stops after the induction furnace 7 shuts down; the dust collector 10 is located on the right side of the cooler 9 and is connected by a pipeline, and a suction fan is connected behind it to maintain a negative dust collection pressure. It is turned on before the cooler 9 and turned off after the cooler 9. The matte ingot mold 11 is located at the lower right end of the induction furnace 7 and is connected to the lower matte outlet of the induction furnace 7 through a high-temperature passage. After the antimony and gold are captured in the induction furnace 7, the slag is discharged first, and then the matte is discharged. Most of the antimony and gold are recovered in the matte. After the matte is recovered, the cooler and the dust collector are cleaned to further recover antimony and gold in the soot.

[0025] For the high-temperature slag melt in the forehearth of the blast furnace, first separate the slag, put it into a high-temperature heat preservation ladle, lift the high-temperature heat preservation ladle to the upper opening of the induction furnace with an electric hoist and pour it into the induction furnace. Then, turn on the induction furnace for heating and heat preservation. Next, add the scavenger into the metering tank of the scavenger, and slowly open the high-pressure nitrogen tank. After decompression, blow in nitrogen to intensively stir the molten slag, quickly promote the antimony and gold capture reaction. At the same time, turn on the cooling and dust collection, and stop the nitrogen stirring. After clarification for a certain period of time, open the slag valve and matte valve at the bottom of the induction furnace, discharge the slag for water quenching utilization, discharge the matte for ingot casting to recover antimony and gold, and turn off the induction furnace. After completion, clean the flue and the dust bag to further recover the volatilized antimony and gold.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for capturing antimony and gold from blast furnace slag, comprising a high-pressure nitrogen bag (1), a pressure reducing valve (2), a high-temperature ceramic tube (3), a heat-insulating blast furnace fore bed (4), a high-temperature heat-insulating bag (5), an electric hoist (6), an induction furnace (7), a capture agent metering storage cylinder (8), a cooler (9), a dust collector (10) and a matte ingot mold (11), characterized in that: The high-pressure nitrogen bag (1) is connected to one end of the pressure reducing valve (2) through a pressure-resistant pipe, and the other end of the pressure reducing valve (2) is connected to the high-temperature ceramic tube (3) through the pressure-resistant pipe, and the gas outlet end of the high-temperature ceramic tube (3) is placed in the furnace chamber of the induction furnace (7); A high-temperature insulation bag (5) is provided at the discharge port of the front bed (4) of the heat-insulating blast furnace. The high-temperature insulation bag (5) is suspended on an electric hoist (6). The left side of the high-temperature insulation bag (5) is connected to the slag discharge channel of the front bed (4) of the heat-insulating blast furnace. The capture agent metering storage cylinder (8) is located on the upper right side of the induction furnace (7); the cooler (9) is located on the upper part of the induction furnace (7), and the cooler (9) is connected to the dust collector (10); The matte copper ingot mold (11) is located at the lower right front end of the induction furnace (7), and the matte copper ingot mold (11) is connected to the matte copper outlet of the induction furnace (7).

2. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The high-pressure nitrogen bag (1) is located on the left side of the induction furnace (7), the heat-insulating blast furnace fore bed (4) is located behind the high-pressure nitrogen bag (1), the high-temperature heat-insulating bag (5) is located at the slag outlet on the right side of the heat-insulating blast furnace fore bed (4), and the electric hoist (6) is located on the upper part of the high-temperature heat-insulating bag (5).

3. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The high-temperature insulation bag (5) comprises a shell and an insulation rock wool board, wherein the shell is made of refractory bricks, and the insulation rock wool board covers the outer side wall of the shell.

4. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The heat-insulating blast furnace fore bed (4) is a cubic or rectangular refractory brick furnace used for heat insulation and clarification after the blast furnace slag flows out of the blast furnace slag channel, and has a slag outlet, a matte outlet and a raw antimony outlet.

5. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The high temperature ceramic tube (3) is a corundum ceramic tube.

6. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The capture agent metering storage cylinder (8) is a conical steel bucket with a discharge valve and a cover, and is used for storing and metering the capture agent.

7. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The induction furnace (7) is a medium frequency induction furnace, with a matte outlet and a slag outlet on the bottom side of the furnace, an open top, and an external insulation steel shell.

8. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The cooler (9) is an M-shaped steel tube cooler, the connection opening of which is located above the opening of the induction furnace (7), is larger than the opening of the induction furnace (7), and can be moved left and right, and is used for cooling high-temperature flue gas dust.

9. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The dust collector (10) is a high temperature resistant bag dust collector, and is used to capture smoke and dust.

10. The device for capturing antimony and gold from blast furnace slag according to claim 1, characterized in that: The matte ingot mold (11) is a cast iron steel mold and is used to collect the captured valuable metals antimony and gold matte.

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