CN102312082B - Desulphurization technology of molybdenum concentrate - Google Patents
Desulphurization technology of molybdenum concentrate Download PDFInfo
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- CN102312082B CN102312082B CN 201110293662 CN201110293662A CN102312082B CN 102312082 B CN102312082 B CN 102312082B CN 201110293662 CN201110293662 CN 201110293662 CN 201110293662 A CN201110293662 A CN 201110293662A CN 102312082 B CN102312082 B CN 102312082B
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Abstract
The invention discloses a desulphurization technology of a molybdenum concentrate. The desulphurization technology comprises the following steps: 1, burdening: weighing the molybdenum concentrate, an expanding agent, and a binder according to a weight ratio of the molybdenum concentrate: the expanding agent: the binder of 1:0.2-0.6%:0.3-0.5%, and mixing to obtain an initial raw material; 2, molding: preparing a blank material from the initial raw material with a square or round honeycomb briquette machine; drying, and preparing a dry blank material by putting the preparative blank material at a shade place for natural drying or heating the preparative blank material for drying; and 3, carrying out oxidation desulphurization: carrying out oxidation desulphurization by sending the dry blank material to a tunnel oxidation kiln with a track kiln car. The tunnel oxidation kiln comprises a preheating zone, a sintering zone and a cooling zone. The dry blank material which goes through the tunnel oxidation kiln with the track kiln car stays for 8-16h in the sintering zone to complete the whole process of oxidation desulphurization. By adopting the desulphurization technology of the molybdenum concentrate provided by the present invention, the energy consumption is saved, the exhaust gas discharge is furthest reduced, energy saving and emission reduction are realized, and the production cost is substantially reduced.
Description
Technical field
The invention belongs to sulfide oxidative desulfurization techniques field, be specifically related to a kind of concentrated molybdenum ore oxidation desulfuration process.
Background technology
Concentrated molybdenum ore is the main raw material of producing molybdic oxide, and its main chemical composition is: Mo, 45-53%; SiO
2, 5.5-13%; S, 30-36%; CaO, 1.5-3%.
Oxidation sweetening is the committed step that concentrated molybdenum ore is produced molybdic oxide (molybdenum powder).The quality of concentrated molybdenum ore oxidation sweetening just determines yield that product is last and the complexity of last part technology.
The granularity of concentrated molybdenum ore substantially all is about 200 orders, traditional multiple hearth furnace roasting method technique is directly with roasting in the concentrated molybdenum ore input stove of this granularity, because 60% of the not enough charging capacity of the discharging of the too thin common finished product discharge port of granularity, dust pollution is serious, has substantially all eliminated now this technique.
At present, most manufacturers all adopt rotary kiln to finish the oxidation sweetening operation of concentrated molybdenum ore.Concrete grammar is first concentrated molybdenum ore to be added certain raising agent and binding agent, makes the ball ball by tablets press, drops into rotary kiln baking again.Although the logical oxygen of ball ball inside and comparatively all perseverances of conducting heat, but ball pellet material can not make sulphur and the airborne oxygen in the concentrated molybdenum ore fully react, and the unbalanced accumulation of material in stove hindered the effecting reaction of material, only have by strengthening oxygen-supplying amount and prolonging the way of the residence time of material in kiln and solve, cause thus being multiplied of energy consumption and exhaust gas emission.
The tradition multiple hearth furnace is processed approximately 150Kg of concentrated molybdenum ore material quota of expenditure coal per ton, and power consumption 200KW needs the exhaust smoke level 20000M that administers
3The tradition rotary kiln is processed concentrated molybdenum ore material quota of expenditure coal 200Kg per ton, and power consumption 80KW needs the exhaust smoke level 24000M that administers
3Can find out that from above-mentioned data traditional multiple hearth furnace, rotary kiln can not satisfy the standard of energy-saving and emission-reduction, cause very large cost burden to enterprise, also cause serious energy dissipation, urgent need will be improved and innovate.
Summary of the invention
The object of the present invention is to provide a kind of concentrated molybdenum ore sulfur removal technology, not only save energy consumption reduces discharge amount of exhaust gas to greatest extent, realizes energy-saving and emission-reduction, and greatly reduces production cost.
For achieving the above object, the technical scheme that the present invention takes is: propose a kind of concentrated molybdenum ore sulfur removal technology, it is characterized in that comprising the steps:
Step 1: batching takes by weighing concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.2% ~ 0.6%:0.3% ~ 0.5%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed;
Step 2: moulding, utilize square or circular honey-comb briquet that initial feed is made blank stand-by;
Step 3: drying is put in shady and cool place's seasoning with the blank that makes or heat drying makes flake;
Step 4: oxidation sweetening, dried flake is sent into oxidation sweetening in the tunnel like oxidation kiln by the track kiln car; Described tunnel like oxidation kiln comprises preheating section, the section of burning till, cooling section, and preheating section, the section of burning till, cooling section are cemented in the tunnel oven body of same track in turn; Described flake carries out drying and preheating at preheating section to flake first along with the track kiln car enters tunnel like oxidation kiln, and the temperature of preheating section is controlled at 30 ~ 220 ℃, and the track kiln car enters the section of burning till from preheating section after preheating section stops 1 ~ 2 hour; The temperature of the section of burning till is controlled at 500 ~ 650 ℃, the spontaneous combustion because sulphur can generate heat under high-temperature oxygen-enriched condition, so finishing the oxidation sweetening operation in the section of burning till, flake must burn till blank, the track kiln car enters cooling section after the section of burning till stops 8 ~ 16 hours, burn till blank through cooling off to get the desulfurization concentrated molybdenum ore, the track kiln car after cooling section stopped 4 ~ 8 hours from tunnel like oxidation kiln out, finish whole oxidation sweetening operation;
Described preheating section is provided with built-in flue and external flue, built-in flue will the section of burning till heat energy reach preheating section drying and preheated charge, be provided with settling pocket and vacuum fan in the external flue, the dust in the flue gas is in the settling pocket sedimentation, and residual air is led to the desulfurization adsorption unit and processed rear the discharge; Described cooling section arranges gas blower, gas blower is blown into cooling section with freezing air, blank is burnt till in cooling on the one hand, freezing air is heated simultaneously, the warm air of a large amount of preheating is provided for the section of burning till, on the other hand, under the drive of airflow, take the waste heat of the section of burning till to preheating section by built-in flue, and utilize these waste heats to come dry and preheated charge.
Described swelling agent is at least a in wood shavings material, the vegetable fibre.
Described vegetable fibre is the mixture of paddy rice bar, Chinese sorghum and straw.
Described tackiness agent is a kind of in the mixture, water glass, swelling soil of flour and clear water; The mixture of described flour and clear water is to mix to be incorporated in to stir under the heated condition in the ratio of 100g:1000L in flour and clear water to make, and its viscosity is 40 ~ 70s.
Described tunnel like oxidation kiln is rectangular structure, and tunnel like oxidation kiln overall length is not shorter than 27.3m, and the Length Ratio of preheating section, the section of burning till, cooling section is 1:8:4.
The described section of burning till both sides are provided with the heating chamber of muffle device, and the muffle heating chamber is provided with temperature sensor, and when the section of burning till temperature was lower than 500 ℃, the muffle heating chamber adds the section of burning till vulcanized temperature.
Can regulate wind speed by vacuum fan and gas blower, and then regulate and to enter air draught and the oxygen-supplying amount of the section of burning till, control the temperature of the section of burning till below 650 ℃.
The blank that makes in the described step 2 contains the water more than 5%, and behind step 3 spontaneous combustion drying or heat drying, the water content in the blank is down to below 5%; Heat drying in the step 3 be blank at the front end of preheating section, utilize the waste heat of the section of burning till to the blank drying, and drying temperature is below 50 ℃.
Swelling agent of the present invention and tackiness agent loss on ignition reach greatly less residue, and residue does not affect lower segment process.Swelling agent of the present invention is at least a in wood shavings material, the vegetable fibre, its role is to promote fully contacting of the thermal efficiency transmission of concentrated molybdenum ore and warm air and concentrated molybdenum ore; Tackiness agent of the present invention is a kind of in the mixture, water glass, swelling soil of flour and clear water, and its effect is to help concentrated molybdenum ore machine-shaping.
The present invention is processed into square or circular honeycomb coaly blank with the initial feed that concentrated molybdenum ore, swelling agent, binding agent form, and purpose is to make concentrated molybdenum ore fully to contact with air, and then guarantees that sulphur and airborne oxygen in the concentrated molybdenum ore fully react.
Tunnel like oxidation kiln provided by the invention is processed approximately 20 ~ 30Kg of mineral aggregate quota of expenditure coal per ton, and power consumption 10KW needs the exhaust smoke level 8000M that administers
3
Based on above technical scheme, according to concentrated molybdenum ore sulfur removal technology provided by the invention concentrated molybdenum ore is carried out the oxidation deoxidation, have following beneficial effect:
1, adopts the material standing and reacting, reduce machinery and staff operation, lower to greatest extent the production run cost;
2, material all is to carry out at low temperatures into and out of kiln, has greatly reduced staff's operation intensity, has further improved safe reliability in the production process;
3, tunnel like oxidation kiln provided by the invention takes full advantage of heat supply preheating section, the section of burning till, the required heat of cooling zone that the sulphur spontaneous combustion discharges, fuel, power consumption have been saved, not needing provides combustion-supporting oxygen to heating gas, the waste gas that has produced when having reduced fuel combustion and combustion-supporting gas more than needed; Have environment-friendly high-efficiency, the remarkable advantage that energy consumption is low, output is large has economic advantage in addition;
4, the present invention makes square or circular honeycomb coaly with middle blank, increased the contact area of blank and air, guaranteed that sulphur and the airborne oxygen in the concentrated molybdenum ore fully reacts, further shortened the man-hour of whole technique, save fuel, power consumption, and improved the quality of the concentrated molybdenum ore after the desulfurization;
5, in the whole oxidation sweetening process, discharge amount of exhaust gas extremely reduces, and saves desulfurization energy consumption and device running cost;
6, the material after the present invention disposes, physics and stable chemical performance are for next step deep processing of concentrated molybdenum ore provides reliable guarantee.
Description of drawings
Fig. 1 is the schematic diagram of tunnel like oxidation kiln.
Fig. 2 is the schema of concentrated molybdenum ore sulfur removal technology.
Fig. 3 is for carrying out the process flow sheet of oxidation sweetening with tunnel like oxidation kiln.
Wherein, 1, preheating section; 2, the section of burning till; 3, cooling section; 4, settling pocket; 5, external flue; 6, exhaust blower; 7, vacuum fan.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail, but they are not limitation of the invention.
As shown in Figure 1, this tunnel like oxidation kiln is rectangular structure, comprises preheating section 1, the section of burning till 2, cooling section 3, and they are cemented in the tunnel oven body of same track in turn; Tunnel like oxidation kiln overall length is not shorter than 27.3m, and the Length Ratio of preheating section 1, the section of burning till 2, cooling section 3 is 1:8:4; Preheating section 1 is provided with built-in flue and external flue 5, built-in flue will the section of burning till heat energy reach preheating section drying and preheated charge, be provided with settling pocket 4 in the external flue 5, the sedimentation in settling pocket 4 of the dust in the flue gas is collected, and residual air is discharged after the desulfurization adsorption unit is processed; Cooling section 3 is provided with gas blower 6, gas blower 6 is blown into cooling section 3 with freezing air, blank is burnt till in cooling on the one hand, freezing air is heated simultaneously, the warm air of a large amount of preheating is provided for the section of burning till 2, on the other hand, under the drive of airflow, take the waste heat of the section of burning till 2 to preheating section 1 by built-in flue, and utilize these waste heats to come dry and preheated charge.The section of burning till 2 both sides are provided with the heating chamber of muffle device, and the muffle heating chamber is provided with temperature sensor, and when the section of burning till 2 temperature were lower than 500 ℃, the muffle heating chamber adds the section of burning till 2 vulcanized temperature.Can regulate wind speed by vacuum fan 7 and gas blower 6, and then regulate and to enter air draught and the oxygen-supplying amount of the section of burning till 2, control the temperature of the section of burning till 2 below 650 ℃.
As shown in Figure 2, this concentrated molybdenum ore sulfur removal technology comprises the steps:
Step 1: batching takes by weighing concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.2% ~ 0.6%:0.3% ~ 0.5%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed;
Step 2: moulding, utilize square or circular honey-comb briquet that initial feed is made blank stand-by;
Step 3: drying is put in shady and cool place's seasoning with the blank that makes or heat drying makes flake; The blank that makes in the step 2 contains the water more than 5%, and behind step 3 spontaneous combustion drying or heat drying, the water content in the blank is down to below 5%; Heat drying be blank at the front end of preheating section 1, utilize the waste heat of the section of burning till 2 to the blank drying, and drying temperature is below 50 ℃;
Step 4: oxidation sweetening, dried flake is sent into oxidation sweetening in the tunnel like oxidation kiln by the track kiln car; Flake carries out drying and preheating at 1 pair of flake of preheating section first along with the track kiln car enters tunnel like oxidation kiln, and the temperature of preheating section 1 is controlled at 30 ~ 220 ℃, and the track kiln car enters the section of burning till 2 from preheating section 1 after preheating section 1 stops 1 ~ 2 hour; The temperature of the section of burning till 2 is controlled at 500 ~ 650 ℃, the spontaneous combustion because sulphur can generate heat under high-temperature oxygen-enriched condition, so finishing the oxidation sweetening operation in the section of burning till 2, flake must burn till blank, the track kiln car enters cooling section 3 after the section of burning till 2 stops 8 ~ 16 hours, burn till blank through cooling off to get the desulfurization concentrated molybdenum ore, the track kiln car after cooling section 3 stops 4 ~ 8 hours from tunnel like oxidation kiln out, finish whole oxidation sweetening operation.
Swelling agent is at least a in wood shavings material, the vegetable fibre.
Vegetable fibre is the mixture of paddy rice bar, Chinese sorghum and straw.
Tackiness agent is a kind of in the mixture, water glass, swelling soil of flour and clear water; The mixture of described flour and clear water is to mix to be incorporated in to stir under the heated condition in the ratio of 100g:1000L in flour and clear water to make, and its viscosity is 40 ~ 70s.
Embodiment one:
The present embodiment adopts the main chemical composition of concentrated molybdenum ore as follows: Mo, 53%; SiO
2, 6.5%; S, 30 ~ 34%; CaO, 1.5%;
The swelling agent that the present embodiment adopts is the wood shavings material; Binding agent is the mixture of flour and clear water.
Preparation technology:
1, batching takes by weighing concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.6%:0.5%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed;
2, moulding utilizes the adapted for square honeycomb briquette machine that initial feed is made blank stand-by;
3, drying is put in shady and cool place seasoning to blank water content with the blank that makes and makes flake below 5%;
4, oxidation sweetening is sent into oxidation sweetening in the tunnel like oxidation kiln with dried flake by the track kiln car; By regulating vacuum fan 7 and gas blower 6, control preheating section 1 temperature is at 30 ~ 200 ℃, and the section of burning till 2 temperature are at 550 ~ 650 ℃; Flake enters tunnel like oxidation kiln with the track kiln car, and through preheating section 1, through cooling section 3, the track kiln car out, is finished this oxidation sweetening operation from tunnel like oxidation kiln after the section of burning till 2 stops 16 hours.Burn till after measured rear material sulfur-bearing 2.8%, be the desirable quality before the sodium roasting.
Embodiment two:
The present embodiment adopts the main chemical composition of concentrated molybdenum ore as follows: Mo, 51%; SiO
2, 5.5%; S, 30 ~ 33%; CaO, 2%;
The swelling agent that the present embodiment adopts is vegetable fibre; Binding agent is water glass.
Preparation technology:
1, batching takes by weighing concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.5%:0.4%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed;
2, moulding utilizes circular honey-comb briquet that initial feed is made blank stand-by;
3, drying is put in shady and cool place seasoning to blank water content with the blank that makes and makes flake below 5%;
4, oxidation sweetening is sent into oxidation sweetening in the tunnel like oxidation kiln with dried flake by the track kiln car; By regulating vacuum fan 7 and gas blower 6, control preheating section 1 temperature is at 30 ~ 150 ℃, and the temperature of preheating section 1 front end is at 30 ~ 50 ℃, and the section of burning till 2 temperature are at 550 ~ 650 ℃; Flake enters tunnel like oxidation kiln with the track kiln car, after preheating section 1 stops 1 hour, enter the section of burning till 2, after the section of burning till 2 stops 13 hours, enter cooling section 3, after cooling section 3 stops 6 hours, the track kiln car out, is finished this oxidation sweetening operation from tunnel like oxidation kiln.Burn till after measured rear material sulfur-bearing 2.5%, be the desirable quality before the sodium roasting.
Embodiment three:
The present embodiment adopts the main chemical composition of concentrated molybdenum ore as follows: Mo, 45%; SiO
2, 13%; S, 30 ~ 33%; CaO, 3%;
The swelling agent that the present embodiment adopts is wood shavings material and vegetable fibre, and the weight ratio of wood shavings material and vegetable fibre is 1:1; Binding agent is swelling soil.
Preparation technology:
1, batching takes by weighing concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.3%:0.4%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed;
2, moulding utilizes the adapted for square honeycomb briquette machine that initial feed is made blank stand-by;
3, drying is put in shady and cool place seasoning to blank water content with the blank that makes and makes flake below 5%;
4, oxidation sweetening is sent into oxidation sweetening in the tunnel like oxidation kiln with dried flake by the track kiln car; By regulating vacuum fan 7 and gas blower 6, control preheating section 1 temperature is at 30 ~ 220 ℃, and the section of burning till 2 temperature are at 550 ~ 650 ℃; Flake enters tunnel like oxidation kiln with the track kiln car, enters the section of burning till 2 after preheating section 1 stops 1 hour, and through cooling section 3, the track kiln car out, is finished this oxidation sweetening operation from tunnel like oxidation kiln after the section of burning till 2 stops 8 hours.Burn till after measured rear material sulfur-bearing 2.3%, be the desirable quality before the sodium roasting.
Embodiment four:
The present embodiment adopts the main chemical composition of concentrated molybdenum ore as follows: Mo, 45%; SiO
2, 8.5%; S, 30 ~ 31%; CaO, 2.6%;
The swelling agent that the present embodiment adopts is vegetable fibre; Binding agent is swelling soil.
Preparation technology:
1, batching takes by weighing concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.2%:0.3%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed;
2, moulding utilizes circular honey-comb briquet that initial feed is made blank stand-by;
3, oxidation sweetening is sent into oxidation sweetening in the tunnel like oxidation kiln with blank by the track kiln car; By regulating vacuum fan 7 and gas blower 6, control preheating section 1 temperature is at 30 ~ 100 ℃, and the temperature of preheating section 1 front end is at 30 ~ 50 ℃, and the section of burning till 2 temperature are at 550 ~ 650 ℃; Flake enters tunnel like oxidation kiln with the track kiln car, preheating section 1 front end stop 1 hour, after preheating section 1 rear end stops 1 hour, enter the section of burning till 2, after stopping 9 hours, the section of burning till 2 enters cooling section 3, after cooling section 3 stops 5 hours, the track kiln car out, is finished this oxidation sweetening operation from tunnel like oxidation kiln.Burn till after measured rear material sulfur-bearing 2.3%, be the desirable quality before the sodium roasting.
Embodiment five:
The present embodiment adopts the main chemical composition of concentrated molybdenum ore as follows: Mo, 49%; SiO
2, 9%; S, 30 ~ 32%; CaO, 2.2%;
The swelling agent that the present embodiment adopts is vegetable fibre; Binding agent is the mixture of flour and clear water.
Preparation technology:
1, batching claims concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.3%:0.3%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed;
2, moulding utilizes the adapted for square honeycomb briquette machine that initial feed is made blank stand-by;
3, drying is put in shady and cool place seasoning to blank water content with the blank that makes and makes flake below 5%;
4, oxidation sweetening is sent into oxidation sweetening in the tunnel like oxidation kiln with dried flake by the track kiln car; By regulating vacuum fan 7 and gas blower 6, control preheating section 1 temperature is at 30 ~ 220 ℃, and the section of burning till 2 temperature are at 550 ~ 650 ℃; Flake enters tunnel like oxidation kiln with the track kiln car, enters the section of burning till 2 through preheating section 1, and through cooling section 3, the track kiln car out, is finished this oxidation sweetening operation from tunnel like oxidation kiln after the section of burning till 2 stops 10 hours.Burn till after measured rear material sulfur-bearing 2.6%, be the desirable quality before the sodium roasting.
Claims (5)
1. a concentrated molybdenum ore sulfur removal technology is characterized in that comprising the steps:
Step 1: batching takes by weighing concentrated molybdenum ore, swelling agent, binding agent according to concentrated molybdenum ore, swelling agent, weight of binder than 1:0.2% ~ 0.6%:0.3% ~ 0.5%; And concentrated molybdenum ore and swelling agent, binding agent be mixed to get initial feed; Swelling agent is at least a in wood shavings material, the vegetable fibre; Vegetable fibre is the mixture of paddy rice bar, Chinese sorghum and straw; Binding agent is a kind of in the mixture, water glass, swelling soil of flour and clear water; The mixture of flour and clear water is to mix to be incorporated in to stir under the heated condition in the ratio of 100g:1000L in flour and clear water to make, and its viscosity is 40 ~ 70s;
Step 2: moulding, utilize square or circular honey-comb briquet that initial feed is made blank stand-by;
Step 3: drying is put in shady and cool place's seasoning with the blank that makes or heat drying makes flake;
Step 4: oxidation sweetening, dried flake is sent into oxidation sweetening in the tunnel like oxidation kiln by the track kiln car; Described tunnel like oxidation kiln comprises preheating section (1), the section of burning till (2), cooling section (3), and preheating section (1), the section of burning till (2), cooling section (3) are cemented in the tunnel oven body of same track in turn; Described flake is along with the track kiln car enters tunnel like oxidation kiln, first at preheating section (1) flake is carried out drying and preheating, the temperature of preheating section (1) is controlled at 30 ~ 220 ℃, and the track kiln car enters the section of burning till (2) from preheating section (1) after preheating section (1) stops 1 ~ 2 hour; The temperature of the section of burning till (2) is controlled at 500 ~ 650 ℃, the spontaneous combustion because sulphur can generate heat under high-temperature oxygen-enriched condition, so finishing the oxidation sweetening operation in the section of burning till (2), flake must burn till blank, the track kiln car enters cooling section (3) after the section of burning till (2) stops 8 ~ 16 hours, burn till blank through cooling off to get the desulfurization concentrated molybdenum ore, the track kiln car after cooling section (3) stopped 4 ~ 8 hours from tunnel like oxidation kiln out, finish whole oxidation sweetening operation;
Described preheating section (1) is provided with built-in flue and external flue (5), built-in flue will the section of burning till (2) heat energy reach preheating section (1) drying and preheated charge, be provided with settling pocket (4) and vacuum fan (7) in the external flue (5), dust in the flue gas is in settling pocket (4) sedimentation, and residual air is led to the desulfurization adsorption unit and processed rear the discharge; Described cooling section (3) arranges gas blower (6), gas blower (6) is blown into cooling section (3) with freezing air, blank is burnt till in cooling on the one hand, freezing air is heated simultaneously, the warm air of a large amount of preheating is provided for the section of burning till (2), on the other hand, under the drive of airflow, waste heat that will the section of burning till (2) takes preheating section (1) to by built-in flue, and utilizes these waste heats to come dry and preheated charge.
2. according to concentrated molybdenum ore sulfur removal technology claimed in claim 1, it is characterized in that: described tunnel like oxidation kiln is rectangular structure, and tunnel like oxidation kiln overall length is not shorter than 27.3m, and the Length Ratio of preheating section (1), the section of burning till (2), cooling section (3) is 1:8:4.
3. according to concentrated molybdenum ore sulfur removal technology claimed in claim 1, it is characterized in that: the described section of burning till (2) both sides are provided with the heating chamber of muffle device, the muffle heating chamber is provided with temperature sensor, when the section of burning till (2) temperature was lower than 500 ℃, the muffle heating chamber adds the section of burning till (2) vulcanized temperature.
4. according to concentrated molybdenum ore sulfur removal technology claimed in claim 1, it is characterized in that: regulate wind speed by vacuum fan (7) and gas blower (6), and then regulate and to enter air draught and the oxygen-supplying amount of the section of burning till (2), control the temperature of the section of burning till (2) below 650 ℃.
5. according to concentrated molybdenum ore sulfur removal technology claimed in claim 1, it is characterized in that: the blank that makes in the described step 2 contains the water more than 5%, and behind step 3 spontaneous combustion drying or heat drying, the water content in the blank is down to below 5%; Heat drying in the step 3 be blank at the front end of preheating section (1), utilize the waste heat of the section of burning till (2) to the blank drying, and drying temperature is below 50 ℃.
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| CN 201110293662 CN102312082B (en) | 2011-10-08 | 2011-10-08 | Desulphurization technology of molybdenum concentrate |
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|---|---|---|---|
| CN 201110293662 CN102312082B (en) | 2011-10-08 | 2011-10-08 | Desulphurization technology of molybdenum concentrate |
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| CN102312082B true CN102312082B (en) | 2013-04-17 |
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| CN104032126B (en) * | 2014-04-30 | 2016-06-15 | 中南大学 | A kind of technique of moving bed roasting Low Grade Molybdenum Concentrates |
| CN107382279A (en) * | 2017-08-25 | 2017-11-24 | 重庆升上源环境治理有限公司 | A kind of haydite burning process |
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| US4555387A (en) * | 1984-02-27 | 1985-11-26 | Amax Inc. | Flash roasting of molybdenum sulfide concentrates in a slagging reactor |
| CN1069111C (en) * | 1998-09-11 | 2001-08-01 | 中南工业大学 | Molding method of roasted concentrated molybdenum ore |
| CN101343696A (en) * | 2008-08-15 | 2009-01-14 | 昆明理工大学 | Desulfurization method for molybdenum sulfide |
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