CN116929082A - Oxygen-enriched side-blown smelting furnace and electric heating front-bed furnace drying method - Google Patents
Oxygen-enriched side-blown smelting furnace and electric heating front-bed furnace drying method Download PDFInfo
- Publication number
- CN116929082A CN116929082A CN202310955276.4A CN202310955276A CN116929082A CN 116929082 A CN116929082 A CN 116929082A CN 202310955276 A CN202310955276 A CN 202310955276A CN 116929082 A CN116929082 A CN 116929082A
- Authority
- CN
- China
- Prior art keywords
- furnace
- electric heating
- oxygen
- front bed
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005485 electric heating Methods 0.000 title claims abstract description 132
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 239000001301 oxygen Substances 0.000 title claims abstract description 113
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 113
- 238000001035 drying Methods 0.000 title claims abstract description 31
- 238000003723 Smelting Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 33
- 238000004321 preservation Methods 0.000 claims abstract description 11
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 34
- 239000011819 refractory material Substances 0.000 claims description 28
- 239000000571 coke Substances 0.000 claims description 25
- 239000002893 slag Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000004927 clay Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 230000000630 rising effect Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- DUGCZLXAKMIUGN-UHFFFAOYSA-N [Ni].[Pb].[Sn].[Cu] Chemical compound [Ni].[Pb].[Sn].[Cu] DUGCZLXAKMIUGN-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1545—Equipment for removing or retaining slag
- F27D3/1554—Equipment for removing or retaining slag for removing the slag from the surface of the melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for utilizing an oxygen-enriched side-blown smelting furnace and an electrothermal front-bed furnace drying method, which comprises the following steps: the method comprises a baking preparation stage, an electric heating front bed low-temperature baking stage, an electric heating front bed medium-temperature baking and oxygen-enriched side-blown furnace low-temperature baking stage, an electric heating front bed high-temperature baking and oxygen-enriched side-blown furnace medium-temperature baking stage, an electric heating front bed heat-preservation baking and oxygen-enriched side-blown furnace medium-temperature baking stage and a baking end stage. By adopting different methods at different temperature rising stages, the temperature rising curve of the whole baking process is characterized by linearization, so that all parts in the furnace are heated uniformly, the problem that the temperature in the furnace is difficult to control accurately in the prior art, thereby influencing the baking effect is solved, and the beneficial effect of improving the baking quality is produced.
Description
Technical Field
The invention relates to the technical field of nonferrous metallurgical furnace kiln opening, in particular to a method for utilizing an oxygen-enriched side-blown smelting furnace and an electrothermal front-bed baking furnace.
Background
The oxygen-enriched side-blown furnace is an energy-saving high-efficiency smelting furnace which is widely applied to copper-nickel-lead-tin smelting and has the advantages of small gas consumption, small occupied area, strong raw material adaptability, less waste gas emission, high metal recovery rate and the like.
For a newly built oxygen-enriched side-blown furnace and an electric heating front bed, the building mode and the internal structure of the newly built oxygen-enriched side-blown furnace can lead the furnace body to contain more moisture or water. If the furnace is directly ignited and opened, the moisture in the furnace can be quickly evaporated to cause pulverization and cracking of the refractory material, cracking of the furnace body and damage of the hearth. Therefore, the baking furnace is an important link before the furnace is opened, the baking furnace can ensure that the furnace body is not damaged, simultaneously the refractory material is fully sintered, the stress caused by thermal expansion is eliminated, and the service life of the refractory material is prolonged.
At present, the firewood, coke or natural gas direct oven has the following problems: 1. the temperature in the furnace is not easy to control, and the heat stress is easy to generate, so that the fire-resistant materials in the furnace are burnt; 2. the furnace effect is poor due to the uneven heating of all parts in the furnace; 3. the normal production of the furnace is affected by overlong furnace drying time, and the furnace drying cost is increased; 4. the water vapor and the smoke in the baking process can not be discharged in time, so that the production field environment is bad, and the instrument of the furnace top are damaged; 5. the progress of each industrial furnace is difficult to control and control to be consistent when the industrial furnace is baked, and an oxygen-enriched side-blown smelting furnace and an electric heating front-bed baking method are provided after the improvement of the related technologies.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides an oxygen-enriched side-blown smelting furnace and an electric heating front-bed furnace drying method, which solve the problem that the furnace temperature in the prior art is not well controlled so as to influence the furnace drying effect.
According to the technical scheme of the invention, the method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying method comprises the following steps:
(1) Stage of preparation before baking: the oxygen-enriched side-blown furnace and the electrothermal front bed are provided with a copper discharge port, a slag discharge port and an air discharge port, the inner side hole is plugged by adding 2/3 clay powder into 1/3 coke powder, the outer side hole is plugged by a clay gun, and a slag-making bottom material layer is paved in the electrothermal front bed;
(2) Low-temperature baking stage of electric heating front bed: a gas heating furnace is arranged on a platform above the electric heating front bed, the gas heating furnace is controlled to continuously blow heating gas into the electric heating front bed, and the electric heating front bed is subjected to low-temperature baking according to the temperature range and time of the refractory material of the electric heating front bed;
(3) Medium-temperature baking furnace and oxygen-enriched side-blowing furnace low-temperature baking stage of electric heating front bed: paving a firewood layer in the electric heating front bed, igniting the firewood layer, baking with small fire, carrying out medium-temperature baking on the electric heating front bed according to the temperature range and time of the refractory material of the electric heating front bed, simultaneously, hanging a platform gas heating furnace above the electric heating front bed above an oxygen-enriched side-blowing furnace platform by using a travelling crane, controlling the gas heating furnace to continuously blow heating gas into the oxygen-enriched side-blowing furnace, and carrying out low-temperature baking on the oxygen-enriched side-blowing furnace according to the temperature range and time of the refractory material of the oxygen-enriched side-blowing furnace;
(4) A medium-temperature baking stage of the electric heating front bed high-temperature baking furnace and the oxygen-enriched side blowing furnace: paving a coke layer in the electric heating front bed, igniting the coke layer, carrying out a high-temperature baking on the electric heating front bed according to the temperature range and time of the refractory material of the electric heating front bed, paving a firewood layer in the oxygen-enriched side-blown furnace, igniting the firewood layer, baking with small fire, and carrying out a medium-temperature baking on the oxygen-enriched side-blown furnace according to the temperature range and time of the refractory material of the oxygen-enriched side-blown furnace;
(5) Slag making, heat preservation and oxygen enrichment side blowing furnace high temperature baking stage of the electric heating front bed: paving a slag-making layer in the electric heating front bed, controlling an electrode lifting system of the electric heating front bed to descend an electrode to ignite the slag-making layer, carrying out slag-making and heat preservation on the electric heating front bed, paving a coke layer in the oxygen-enriched side-blown furnace, igniting the coke layer, and carrying out high-temperature furnace drying on the oxygen-enriched side-blown furnace according to the temperature range and time of the oxygen-enriched side-blown furnace refractory;
(6) And (3) ending the baking furnace: and after the temperature of the oxygen-enriched side-blown smelting furnace and the electric heating front bed is increased, feeding and opening the furnace.
The technical principle of the invention is as follows: the method has the advantages that the operation of the oxygen-enriched side-blown furnace and the electric heating front bed is realized by adopting different methods according to the temperature range and time of the refractory materials in the furnace at different temperatures, so that the uniform heating of all parts in the furnace is ensured, the furnace drying effect is better, the cost of the furnace is reduced, the water vapor and the flue gas discharged in the furnace drying process are treated, and meanwhile, the oxygen-enriched side-blown smelting furnace and the electric heating front bed simultaneously reach the temperature range capable of feeding production, so that the problem that the furnace temperature is not well controlled in the prior art, and the furnace drying effect is affected is solved.
Compared with the prior art, the invention has the following beneficial effects: 1. according to the invention, the heating gas generated by the gas heating furnace is used for carrying out low-temperature baking on the electric heating front bed and the oxygen-enriched side blowing furnace, most of moisture in the masonry can be evaporated slowly by the method, and pulverization and cracking of the refractory material, expansion crack of the furnace body and damage to the hearth caused by too fast evaporation of the moisture are avoided; 2. according to the invention, different heating stages adopt different methods, and the heating curve of the whole furnace drying process is characterized by linearization, so that each part in the furnace is uniformly heated, cracking caused by excessive stress of the refractory is avoided, the high-temperature fluid scouring and erosion resistance of the refractory is enhanced, and the service life of the refractory is greatly prolonged; 3. the electric heating front bed and the oxygen-enriched side-blown furnace are staggered to bake the furnace, so that the temperature interval of feeding production can be simultaneously reached, the time required by baking the furnace is shortened, and the cost required by baking the furnace is reduced; 4. the water vapor and the smoke generated in the baking process uniformly enter the back-end smoke treatment system, so that the on-site production environment is ensured, and meanwhile, the furnace top instruments and meters are protected from being damaged by smoke erosion.
Drawings
FIG. 1 is a process flow diagram of a method for utilizing an oxygen-enriched side-blown smelting furnace and an electrothermal forehearth furnace according to the present invention.
FIG. 2 is a graph showing the temperature rise of a furnace using an oxygen-enriched side-blown smelting furnace and an electrothermal forehearth furnace drying method according to the present invention.
FIG. 3 is a schematic front view of an electrothermal front bed and an oxygen-enriched side-blown furnace according to the present invention.
FIG. 4 is a graph showing the comparison of the effect of a low temperature oven of a gas heating furnace and a low temperature oven of a resistance wire after use.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the embodiment of the invention provides a method for utilizing an oxygen-enriched side-blown smelting furnace and an electrothermal front-bed furnace, which comprises the following steps:
(1) Stage of preparation before baking: the oxygen-enriched side-blown furnace and the electrothermal front bed are provided with a copper discharge port, a slag discharge port and an air discharge port, the inner side hole is plugged by adding 2/3 clay powder into 1/3 coke powder, the outer side hole is plugged by a clay gun, and a slag-making bottom material layer is paved in the electrothermal front bed;
(2) Low-temperature baking stage of electric heating front bed: a gas heating furnace is arranged on a platform above the electric heating front bed, the gas heating furnace is controlled to continuously blow heating gas into the electric heating front bed, and the electric heating front bed is subjected to low-temperature baking according to the temperature range and time of the refractory material of the electric heating front bed;
(3) Medium-temperature baking furnace and oxygen-enriched side-blowing furnace low-temperature baking stage of electric heating front bed: paving a firewood layer in the electric heating front bed, igniting the firewood layer, baking with small fire, carrying out medium-temperature baking on the electric heating front bed according to the temperature range and time of the refractory material of the electric heating front bed, simultaneously, hanging a platform gas heating furnace above the electric heating front bed above an oxygen-enriched side-blowing furnace platform by using a travelling crane, controlling the gas heating furnace to continuously blow heating gas into the oxygen-enriched side-blowing furnace, and carrying out low-temperature baking on the oxygen-enriched side-blowing furnace according to the temperature range and time of the refractory material of the oxygen-enriched side-blowing furnace;
(4) A medium-temperature baking stage of the electric heating front bed high-temperature baking furnace and the oxygen-enriched side blowing furnace: paving a coke layer in the electric heating front bed, igniting the coke layer, carrying out a high-temperature baking on the electric heating front bed according to the temperature range and time of the refractory material of the electric heating front bed, paving a firewood layer in the oxygen-enriched side-blown furnace, igniting the firewood layer, baking with small fire, and carrying out a medium-temperature baking on the oxygen-enriched side-blown furnace according to the temperature range and time of the refractory material of the oxygen-enriched side-blown furnace;
(5) Slag making, heat preservation and oxygen enrichment side blowing furnace high temperature baking stage of the electric heating front bed: paving a slag-making layer in the electric heating front bed, controlling an electrode lifting system of the electric heating front bed to descend an electrode to ignite the slag-making layer, carrying out slag-making and heat preservation on the electric heating front bed, paving a coke layer in the oxygen-enriched side-blown furnace, igniting the coke layer, and carrying out high-temperature furnace drying on the oxygen-enriched side-blown furnace according to the temperature range and time of the oxygen-enriched side-blown furnace refractory;
(6) And (3) ending the baking furnace: and after the temperature of the oxygen-enriched side-blown smelting furnace and the electric heating front bed is increased, feeding and opening the furnace.
The specific operation flow is as follows: step one: in the preparation stage before baking, the oxygen-enriched side-blown furnace and the electric heating front bed are provided with a copper discharge port, a slag discharge port and an air discharge port, the inner hole is plugged by adding 2/3 clay powder into 1/3 coke powder, the outer hole is plugged by a clay gun, and a slag-making primer layer is paved in the electric heating front bed, wherein the slag-making primer layer comprises the following components: welding a rectangular frame with a steel plate of 8-10mm in the electric heating front bed, placing the rectangular frame in the center of an electrode, tamping a graphite conducting layer with the thickness of about 30mm in the bottom layer in the frame, spreading copper-clad iron fragments on the upper part of the graphite conducting layer, and filling copper matte blocks and water quenching slag outside the frame, wherein the thickness is about 80-100mm.
Step two: and a low-temperature baking stage of the electric heating front bed, wherein a gas heating furnace is arranged on a platform above the electric heating front bed, the gas heating furnace is controlled to continuously blow heating gas into the electric heating front bed, the electric heating front bed is subjected to low-temperature baking according to the temperature range and time of the refractory material of the electric heating front bed, the low-temperature baking stage of the electric heating front bed lasts for about 60 hours, and the temperature is controlled to be 200-250 ℃.
Step three: the method comprises the steps of paving a firewood layer in an electric heating front bed, igniting the firewood layer, baking with small fire, and carrying out medium-temperature baking on the electric heating front bed according to the temperature range and time of the refractory material of the electric heating front bed, wherein the thickness of the firewood layer in the electric heating front bed is 60-80mm, the medium-temperature baking stage of the electric heating front bed lasts for about 48 hours, and the temperature is controlled to be 450-600 ℃. Simultaneously, a crane is utilized to hoist a platform gas heating furnace above the electric heating front bed to the position above an oxygen-enriched side-blowing furnace platform, the gas heating furnace is controlled to continuously blow heating gas into the oxygen-enriched side-blowing furnace, the oxygen-enriched side-blowing furnace is subjected to low-temperature furnace drying according to the temperature range and time of the oxygen-enriched side-blowing furnace refractory, the low-temperature furnace drying stage of the oxygen-enriched side-blowing furnace lasts for about 72 hours, and the temperature is controlled to be 250-300 ℃.
Step four: and a coke layer is paved in the electric heating front bed, the coke layer is ignited, the electric heating front bed is subjected to high-temperature baking according to the temperature range and time of the electric heating front bed refractory material, the thickness of the coke layer in the electric heating front bed is 50-60mm, the electric heating front bed high-temperature baking stage lasts for about 48 hours, and the temperature is controlled to be 850-950 ℃. Meanwhile, a firewood layer is paved in the oxygen-enriched side-blown furnace, the firewood layer is ignited and baked with small fire, the oxygen-enriched side-blown furnace is subjected to medium temperature baking according to the temperature range and time of the refractory material of the oxygen-enriched side-blown furnace, the thickness of the firewood layer in the oxygen-enriched side-blown furnace is 50-70mm, the medium temperature baking stage of the oxygen-enriched side-blown furnace lasts for about 48 hours, and the temperature is controlled to be 400-550 ℃.
Step five: in the high-temperature baking stage of the slagging heat preservation and oxygen-enriched side blowing furnace of the electric heating front bed, a slagging material layer is paved in the electric heating front bed, an electrode lifting system of the electric heating front bed is controlled to descend and ignite the slagging material layer, the slagging heat preservation is carried out on the electric heating front bed, the thickness of the slagging material layer in the electric heating front bed is 80-100mm, the slagging heat preservation stage of the electric heating front bed lasts about 60 hours, and the temperature is controlled to be 1000-1100 ℃. Simultaneously, paving a coke layer in the oxygen-enriched side-blown furnace, igniting the coke layer, and carrying out high-temperature furnace drying on the oxygen-enriched side-blown furnace according to the temperature range and time of the refractory material of the oxygen-enriched side-blown furnace, wherein the thickness of the coke layer in the oxygen-enriched side-blown furnace is 40-50mm, the high-temperature furnace drying stage of the oxygen-enriched side-blown furnace lasts for about 36 hours, and the temperature is controlled at 800-900 ℃.
Step six: and in the finishing stage of the baking furnace, after the temperature of the oxygen-enriched side-blown smelting furnace and the electric heating front bed are raised, feeding and opening the furnace.
As shown in figure 1, as a preferable technical scheme of the invention, a rectangular frame is welded in the electric heating front bed in the pre-baking stage by using a steel plate with the thickness of 8-10mm, the rectangular frame is placed in the center of an electrode, a graphite conducting layer with the thickness of about 30mm is rammed at the bottom layer in the frame, copper-clad iron fragments are fully paved on the upper part of the graphite conducting layer, copper matte blocks and water quenching slag are fully filled outside the frame, and the thickness is about 80-100mm.
As shown in figure 1, as a preferable technical scheme of the invention, an air outlet pipeline of the air heating furnace in the low-temperature baking stage of the electric heating front bed is connected with a four-way pipeline through a flange, the low-temperature baking stage of the electric heating front bed lasts for about 60 hours, and the temperature is controlled to be 200-250 ℃. In the scheme, the air outlet pipeline is connected with a four-way pipeline through flange connection, so that the heating furnace is guaranteed to guide heating gas into the electric heating front bed through three pipelines, and the low-temperature baking stage of 60h is completed.
As shown in figure 1, as a preferable technical scheme of the invention, the thickness of the firewood layer in the electric heating front bed middle temperature baking and oxygen-enriched side blowing furnace low temperature baking stages is 60-80mm, the electric heating front bed middle temperature baking stage lasts for about 48 hours, the temperature is controlled to be 450-600 ℃, the oxygen-enriched side blowing furnace low temperature baking stage lasts for about 72 hours, and the temperature is controlled to be 250-300 ℃. In the scheme, firewood is paved in the electric heating front bed, the electric heating front bed is heated by firewood combustion, meanwhile, heating gas is continuously blown into the oxygen-enriched side-blown furnace through the gas heating furnace, and further, the temperature rising curve of the electric heating front bed and the oxygen-enriched side-blown furnace refractory material is utilized to ensure the implementation control of temperature.
As shown in figure 1, as a preferable technical scheme of the invention, the thickness of the coke layer in the electric heating front bed high-temperature baking stage and the oxygen-enriched side blowing furnace medium-temperature baking stage is 50-60mm, the electric heating front bed high-temperature baking stage lasts for about 48 hours, the control temperature is 850-950 ℃, the thickness of the firewood layer in the oxygen-enriched side blowing furnace is 50-70mm, the oxygen-enriched side blowing furnace medium-temperature baking stage lasts for about 48 hours, and the control temperature is 400-550 ℃. In the scheme, a coke layer with higher temperature during combustion is used for the electric heating front-bed high-temperature baking furnace, a firewood layer is paved inside the oxygen-enriched side-blown furnace, and the temperature rising curve of the refractory material is measured while the temperature is further increased.
As shown in figure 1, as a preferable technical scheme of the invention, the thickness of a slag layer in an electric heating front bed in the electric heating front bed slag-making heat-preserving and oxygen-enriched side-blowing furnace high-temperature baking stage is 80-100mm, the electric heating front bed slag-making heat-preserving stage lasts for about 60 hours, the control temperature is 1000-1100 ℃, the thickness of a coke layer in the oxygen-enriched side-blowing furnace is 40-50mm, the oxygen-enriched side-blowing furnace high-temperature baking stage lasts for about 36 hours, and the control temperature is 800-900 ℃. In the scheme, the slag-forming material layer with higher temperature during combustion is used for the electric heating front-bed high-temperature baking furnace, the coke layer is paved inside the oxygen-enriched side-blown furnace, and the temperature rising curve of the refractory material is measured while the temperature is further increased.
As shown in FIG. 1, as a preferred technical scheme of the invention, the water vapor and the flue gas generated in the electric heating front bed and oxygen-enriched side-blown furnace drying process enter a rear flue gas treatment process system through a flue pipe by using the same 50kw ring air collecting fan. The same 50kw ring set fan is adopted in the scheme, so that variables can be controlled, and the influence on the final result caused by other reasons is reduced.
Comparative example 1:
the low temperature oven is performed according to the method in patent document 202111358745.1:
s1, paving a hearth material: in order to protect the furnace bottom and prevent the melt from penetrating into the brick joints when the side-blown furnace just feeds materials, firstly paving a sheet iron with the thickness of less than 1mm at the furnace bottom, then taking water quenching slag into the side-blown furnace through a feeding belt, uniformly paving the water quenching slag above a steel plate with the thickness of about 200mm (water content of less than 1 percent), and paving the steel plate with the thickness of 230mm at corners;
s2, paving resistance wires: placing light clay bricks on the bottom water quenching slag as a resistance wire fixing and supporting device; the low-temperature baking stage comprises the following steps:
s3, slowing the temperature rising rate in the early stage of baking;
s4, suspending heating or prolonging the heat preservation time when more water is discharged at a certain stage of heating;
s5, after the low-temperature baking is finished, the power supply of the resistance wire is disconnected, and the resistance wire is removed and is transported out of the furnace.
A plurality of comparative experiments were conducted on the low temperature oven of the above example, and the comparative results are shown in FIG. 4.
As can be seen from example 2 and comparative example 1, the low-temperature oven preparation method using the gas heating furnace of the invention has the advantages of low cost, high operation rate and long operation time, and even improves daily average throughput and yield compared with the prior art.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (7)
1. The method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying is characterized by comprising the following steps:
(1) Stage of preparation before baking: the oxygen-enriched side-blown furnace and the electrothermal front bed are provided with a copper discharge port, a slag discharge port and an air discharge port, the inner side hole is plugged by adding 2/3 clay powder into 1/3 coke powder, the outer side hole is plugged by a clay gun, and a slag-making bottom material layer is paved in the electrothermal front bed;
(2) Low-temperature baking stage of electric heating front bed: a gas heating furnace is arranged on a platform above the electric heating front bed, the gas heating furnace is controlled to continuously blow heating gas into the electric heating front bed, and the electric heating front bed is subjected to low-temperature baking according to the temperature range and time of the refractory material of the electric heating front bed;
(3) Medium-temperature baking furnace and oxygen-enriched side-blowing furnace low-temperature baking stage of electric heating front bed: paving a firewood layer in the electric heating front bed, igniting the firewood layer, baking with small fire, carrying out medium-temperature baking on the electric heating front bed according to the temperature range and time of the refractory material of the electric heating front bed, simultaneously, hanging a platform gas heating furnace above the electric heating front bed above an oxygen-enriched side-blowing furnace platform by using a travelling crane, controlling the gas heating furnace to continuously blow heating gas into the oxygen-enriched side-blowing furnace, and carrying out low-temperature baking on the oxygen-enriched side-blowing furnace according to the temperature range and time of the refractory material of the oxygen-enriched side-blowing furnace;
(4) A medium-temperature baking stage of the electric heating front bed high-temperature baking furnace and the oxygen-enriched side blowing furnace: paving a coke layer in the electric heating front bed, igniting the coke layer, carrying out a high-temperature baking on the electric heating front bed according to the temperature range and time of the refractory material of the electric heating front bed, paving a firewood layer in the oxygen-enriched side-blown furnace, igniting the firewood layer, baking with small fire, and carrying out a medium-temperature baking on the oxygen-enriched side-blown furnace according to the temperature range and time of the refractory material of the oxygen-enriched side-blown furnace;
(5) Slag making, heat preservation and oxygen enrichment side blowing furnace high temperature baking stage of the electric heating front bed: paving a slag-making layer in the electric heating front bed, controlling an electrode lifting system of the electric heating front bed to descend an electrode to ignite the slag-making layer, carrying out slag-making and heat preservation on the electric heating front bed, paving a coke layer in the oxygen-enriched side-blown furnace, igniting the coke layer, and carrying out high-temperature furnace drying on the oxygen-enriched side-blown furnace according to the temperature range and time of the oxygen-enriched side-blown furnace refractory;
(6) And (3) ending the baking furnace: and after the temperature of the oxygen-enriched side-blown smelting furnace and the electric heating front bed is increased, feeding and opening the furnace.
2. The method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying method as claimed in claim 1, wherein the method comprises the following steps: in the preparation stage before the baking furnace, a rectangular frame is welded in an electric heating front bed by using a steel plate with the thickness of 8-10mm, the rectangular frame is placed in the center of an electrode, a graphite conducting layer with the thickness of about 30mm is rammed on the bottom layer in the frame, copper-clad iron fragments are paved on the upper part of the graphite conducting layer, copper matte blocks and water quenching slag are filled outside the frame, and the thickness is about 80-100mm.
3. The method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying method as claimed in claim 1, wherein the method comprises the following steps: the gas outlet pipeline of the gas heating furnace in the low-temperature baking stage of the electric heating front bed is connected with a four-way pipeline through a flange, the low-temperature baking stage of the electric heating front bed lasts for about 60 hours, and the temperature is controlled to be 200-250 ℃.
4. The method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying method as claimed in claim 1, wherein the method comprises the following steps: the thickness of the firewood layer in the electric heating front bed middle temperature baking stage and the oxygen-enriched side blowing furnace low temperature baking stage is 60-80mm, the electric heating front bed middle temperature baking stage lasts for about 48 hours, the control temperature is 450-600 ℃, the oxygen-enriched side blowing furnace low temperature baking stage lasts for about 72 hours, and the control temperature is 250-300 ℃.
5. The method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying method as claimed in claim 1, wherein the method comprises the following steps: the thickness of the coke layer in the electric heating front bed high-temperature baking stage and the oxygen-enriched side-blown furnace medium-temperature baking stage is 50-60mm, the electric heating front bed high-temperature baking stage lasts for about 48 hours, the control temperature is 850-950 ℃, the thickness of the firewood layer in the oxygen-enriched side-blown furnace is 50-70mm, the oxygen-enriched side-blown furnace medium-temperature baking stage lasts for about 48 hours, and the control temperature is 400-550 ℃.
6. The method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying method as claimed in claim 1, wherein the method comprises the following steps: the thickness of a slag layer in the electric heating front bed slag-making heat-preserving and oxygen-enriched side-blowing furnace high-temperature furnace-drying stage is 80-100mm, the electric heating front bed slag-making heat-preserving stage lasts for about 60 hours, the control temperature is 1000-1100 ℃, the thickness of a coke layer in the oxygen-enriched side-blowing furnace is 40-50mm, the oxygen-enriched side-blowing furnace high-temperature furnace-drying stage lasts for about 36 hours, and the control temperature is 800-900 ℃.
7. The method for utilizing the oxygen-enriched side-blown smelting furnace and the electric heating front bed furnace drying method as claimed in claim 1, wherein the method comprises the following steps: the water vapor and the smoke generated in the electric heating front bed and oxygen-enriched side-blown furnace drying process all enter a rear smoke treatment process system through a smoke pipe by using the same 50kw ring air collecting fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310955276.4A CN116929082A (en) | 2023-07-31 | 2023-07-31 | Oxygen-enriched side-blown smelting furnace and electric heating front-bed furnace drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310955276.4A CN116929082A (en) | 2023-07-31 | 2023-07-31 | Oxygen-enriched side-blown smelting furnace and electric heating front-bed furnace drying method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116929082A true CN116929082A (en) | 2023-10-24 |
Family
ID=88384235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310955276.4A Pending CN116929082A (en) | 2023-07-31 | 2023-07-31 | Oxygen-enriched side-blown smelting furnace and electric heating front-bed furnace drying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116929082A (en) |
-
2023
- 2023-07-31 CN CN202310955276.4A patent/CN116929082A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206339094U (en) | Heating using microwave produces the product line device of alloy | |
| CN108624740B (en) | Steelmaking equipment and smelting method for steelmaking by using scrap steel | |
| CN107419052A (en) | The furnace drying method after fire proof material of furnace lining is changed in 120t converters | |
| CN101353579B (en) | 7.63m coke oven negative pressure in-furnace furnace drying method | |
| CN111593149A (en) | Smooth blow-in method for large blast furnace for iron making | |
| CN106546096B (en) | The product line device and production method of microwave heating production alloy | |
| CN106288781A (en) | A kind of monolayer for being reduced directly the mode of production heats and heat reclamation type rotary hearth furnace | |
| CN101294770A (en) | Crucible furnace for alloy melting and heat preservation | |
| CN107238289A (en) | A kind of roaster is calcined control method | |
| CN108411064A (en) | The method of waste steel for electric furnace preheating | |
| CN209371763U (en) | A kind of tunnel oven for bauxite roasting | |
| CN116929082A (en) | Oxygen-enriched side-blown smelting furnace and electric heating front-bed furnace drying method | |
| CN104089476B (en) | A kind of method of induction furnace ferroalloy smelting | |
| CN201053820Y (en) | Highly effective crucible furnace | |
| CN109028973A (en) | A kind of novel furnace drying method of yellow phosphorus electric furnace | |
| CN103727795A (en) | Method for directly transmitting power to bake large-scale direct current electric arc furnace | |
| CN208012367U (en) | A kind of energy-efficient industrial furnace | |
| CN205990415U (en) | A kind of monolayer for being reduced directly the mode of production heats and frequency modulation type rotary hearth furnace | |
| CN206817966U (en) | A kind of new energy saving and environment friendly car type furnace | |
| CN108662854B (en) | Method for heating alloy by using high-temperature flue gas of converter | |
| CN206269585U (en) | A kind of high temperature oxygen deprivation multicell heat accumulation casting furnace | |
| CN206269581U (en) | A kind of high temperature oxygen deprivation multicell heat accumulation founding furnace system | |
| CN101240978A (en) | Slag cleaning furnace once electricity-feeding temperature-raising method | |
| CN115418433B (en) | High-temperature furnace drying method for opening new converter | |
| CN215113907U (en) | Intelligent drying and sintering device for conical quartz ceramic products |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |