CN101245416B - Magnesium refining method with vertical kiln vertical pot silicon heat reduction - Google Patents
Magnesium refining method with vertical kiln vertical pot silicon heat reduction Download PDFInfo
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- CN101245416B CN101245416B CN2008100844118A CN200810084411A CN101245416B CN 101245416 B CN101245416 B CN 101245416B CN 2008100844118 A CN2008100844118 A CN 2008100844118A CN 200810084411 A CN200810084411 A CN 200810084411A CN 101245416 B CN101245416 B CN 101245416B
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Abstract
The invention relates to a method for smelting magnesium in a shaft kiln and a vertical tank with silicon reduction. The method mainly comprises a calcined dolomite system consisting of the shaft kiln, an infrared spectrometer and a scanning electric mirror; a fine grinding and briquetting system consisting of a Raymond mill and a dual-roll ball press; a reduction system consisting of a vertical reduction tank and a reduction furnace; a fuel system consisting of a water-coal-slurry tank and a high-pressure slurry delivery pump; a cooling system consisting of a cooling water tank and a water circulating pump; a heat recycling system consisting of a tube-typed waste heat steam boiler and a steam tank; a vacuum-pumping system consisting of a jet vacuum pump and a vacuum tank; a slag sealing treatment system consisting of a high pressure positive blower, a slag turning pipe and an ageing pool; a dust collecting system consisting of a bag-typed dust collector and a negative-pressure dust collector; a refining system consisting of a double-room constant-refining furnace and an argon tank and a control system consisting of a temperature sensor, a pressure sensor and a computer. The method of the invention is characterized by high yield, energy conservation, emission reduction, no pollution, heat recycling, high utilization of ferrosilicon, and magnesium concentrate yield of over 95 percent and can be applied in magnesium smelting enterprises with dolomite as raw materials, ferrosilicon as a reducing agent and fluorite as a mineralizing agent.
Description
Technical field
The present invention relates to a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction, belong to the magnesium metal smelting technical field.
Technical background
At present, be raw material with the rhombspar, magnesium metal smelting generally adopts " Pidgeon process " Technology.This technology was continued to use 66 years, went through continuous innovation and still had following defective: 1. highly energy-consuming.Equipment power consumption is big, and is white as forging with rotary kiln, can not the preheating rhombspar, rotate the inaction energy consumption, and cooling repeats energy consumption; Reducing process, reduction jar horizontal type structure is unreasonable, mass-and heat-transfer weak effect, ton magnesium comprehensive energy consumption: more than 8.5 tons of mark coals.2. heavily contaminated.Slag removal machine slit dust hot gas flow constitutes dust pollution, and slag waste treatment composing environment pollutes.3. low output.The horizontal technology that is provided with of reduction jar that falls behind, forge white, ferrosilicon, the levigate granularity of fluorite is lower than 80 order ball mill fine grinding process, the time-consuming evacuation process of Dan Zudan pump makes reduction cycle reach 10～12 hours, reduce MAGNESIUM METAL yield and output, material group/magnesium: 8.5, reduce percentage of utilization of fixed asset, increase production cost.4. yield is low.Smart magnesium yield generally is lower than 95%.5. level of automation is low.Forge and whitely can not realize online detection; Temperature, pressure, valve can not be realized automatic control.The Technology backwardness has seriously hindered the good and fast development of magnesium industry.
The invention technology
The object of the present invention is to provide with the rhombspar is raw material, is reductive agent with the ferrosilicon, is mineralizer with the fluorite, realizes forging a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction of white, levigate, reduction, refining whole-process automatic control.
A kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction of the present invention mainly comprises: shaft furnace, infrared spectrometer, scanning electron microscope, coal water slurry jar, burn chew, calorifier, Feng Zui, computer form the white system of forging; Raymond mill, batching microcomputer, two roller ball press, feed appliance, dehumidification drying kiln are formed levigate pressure and are rolled into a ball system; Vertical reducing jar, reduction furnace, computer are formed restoring system; Coal water slurry jar, high pressure pump for mortar transmission, burn chew, calorifier, Feng Zui, electrical header, computer form fuel combustion system; Opening chilled water tank, water circulating pump, cooling-water temperature sensor, electrical header are formed water cooling system; Afterheat steam tubular boiler, vapor can, pressure transmitter are formed thermal cycling and are utilized system; Jet vacuum pump, vacuum tank, electrical header, vacuum pressure sensor are formed pumped vacuum systems; High pressure positive blower, corrugated tube, slag discharging pipe, ageing pond, building block press are formed slag encapsulation process system; Overhead traveling crane, electric block, lifting robot arm are formed location Lift-on/Lift-off System automatically; Air channel, grid mouth, blast regulator, sack cleaner, depression dust-removing device are formed dust-removal system; Two chambers continuous refining furnace, argon tanks, solvent tank, pig moulding machine, computer are formed rectification systems; Infrared spectrometer, scanning electron microscope, temperature sensor, pressure transmitter, vacuum pressure sensor, electrical header tandem are formed automatic control system at computer interface; Its principal character is: shaft furnace has preheating, calcining, cools off three sections functions automatically, automatic blanking, and infrared spectrometer, scanning electron microscope are installed in the calcining section, form to forge white automatic on-line detection; Raymond mill is levigate granularity 400 orders, two roller ball press pressure 200Mpa; Around the reduction furnace heating chamber bottom be provided with coal water slurry burn chew, wind chews, the top is provided with temperature sensor, reduction jar vertical double being installed on the reduction furnace, upper and lower end exposure reduction furnace, the opening encapsulation lid is established in the lower end, during slagging-off and sylphon seal
Connect, the outside, upper end is provided with watercooling jacket, vacuum-pumping tube, in establish magnesium crystallizer, sodium potassium trap, thermal baffle, sealing cover is established on the top; The coal water slurry tank is provided with steel hot water overcoat outward; The jet vacuum pump front end is provided with the high pressure steam jar, and the rear end is provided with vacuum tank; The opening chilled water tank embeds underground; Overhead traveling crane is equipped with 4 lifting robot arms across two reduction furnaces; Corrugated tube, sliding dreg tube are hermetically sealed system, and slag flows into the ageing pond automatically under the high pressure wind effect; The refining shielding gas is an argon gas; Computer controlled automatic shaft furnace, reduction furnace, refining furnace, circulating water temperature, reduction jar, vacuum tank vacuum tightness, afterheat steam tubular boiler, high pressure steam pressure tank, electrical header.
The advantage of a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction of the present invention is: burn out rate 47.5%, igloss amount≤0.5%, hydration activity degree 〉=35% can be provided high-quality forge white; Levigate granularity 400 orders, pellet density 2g/cm
3Pumpdown time 30min; Far ultrared paint makes 1180 ℃ of hyperthermia radiation abilities of reduction furnace improve 17 times, and penetrativity is strong, is rapidly heated simultaneously in the material group table, and reduction cycle is 360min, realizes day three reduction cycles, improves production capacity 35%; Ton magnesium ferrosilicon consumes: 1 ton; Magnesium/material group: 6; Adopt the coal water slurry clean fuel, TSP, SO
2, the CO qualified discharge; Dust pollution is effectively controlled in the sealing slagging-off, and the slag ageing is handled and made building block, and the radical cure slag pollutes; Recycling residual heat, but 3.5 ten thousand tons of marks of ten thousand tons of magnesium save energy coal, energy-conservation 43%; The online detection of omnidistance realization digitizing, control automatically; 18 tons in reduction furnace (50 vertical reducing jars) daily output crystallization magnesium can form the large-scale production capacity.
Embodiment
Describe a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction of the present invention below in detail:
Shaft furnace top preheating section links through transfer roller and white clouds building stones platform, bottom naturally cooling section links through transfer roller and Raymond mill, cartridge heater bottom, middle part calcining section center is equipped with to burn chews, through electrical header with high pressure pump for mortar transmission, coal water slurry jar link and burning is chewed and is equipped with combustion air side by side and chews; Depression dust-removing device and Raymond mill are supporting, and Raymond mill discharge port and pair roller ball press link, and feed appliance enters dehumidification drying kiln through track; A reduction jar water coolant packs into, return water pipe is through electrical header, water circulating pump and opening chilled water tank UNICOM; A reduction jar vacuum-pumping tube links through electrical header and vacuum tank, jet vacuum pump; Reduction furnace burns to be chewed through electrical header and high pressure pump for mortar transmission, coal water slurry jar UNICOM, and combustion air is chewed through electrical header and calorifier and linked; The afterheat steam tubular boiler advances mouth and reduction furnace links, and vapour pipe and high pressure steam jar, jet vacuum pump link; Sliding dreg tube front end and high pressure positive blower link, and rear end and ageing pond link, and upwards are tightly connected through a corrugated tube and a reduction jar lower end; Overhead traveling crane laterally is installed in two row's reduction furnace tops; Air channel, grid mouth, blast regulator forward are arranged in sack cleaner UNICOM outside top, workshop and the workshop; Two chambers continuous refining furnace and argon tanks, solvent tank link, and are furnished with pig moulding machine; Computer configuration is being forged white, batching, reduction, refining workshop section and infrared spectrometer, scanning electron microscope, batching microcomputer, temperature sensor, vacuum pressure sensor, electrical header interface.
Operational instances
Get 600 tons of the block rhombspars of 10～25cm, enter shaft furnace and under 1150 ℃ of conditions, calcine, obtain high-qualityly to forge white 312 tons,
Through levigate granularity 400 orders of Raymond mill, add (75%) 62 ton of 400 order ferrosilicon powder, (95%) 14 ton in 400 order fluorite powder are pressed
396 tons of finish mix groups, with feed appliance through overhead traveling crane pack into the reduction jar, sealing reduction jar is evacuated to 6～13.3Pa, 35 ℃ of watercooling jacket inflow temperatures, 55 ℃ of return water temperatures, temperature is 1180 ℃ in the reduction furnace, and recovery time 360min obtains 66 tons of crystallization magnesium, enter two chambers continuous refining furnace and add smelting agent and argon gas refining, obtain 63 tons in the smart magnesium of 99.99% (massfraction); 284 tons of mark coals consume energy; Slag is pressed into building block through the modification ageing of ageing pond.
A kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction of the present invention have high yield, energy-conservation, reduce discharging, radical cure pollutions, thermal cycling utilization, ferrosilicon utilization ratio height, smart magnesium yield surpass 95% characteristics, be applicable to all be raw material with the rhombspar, be reductive agent with the ferrosilicon, with the fluorite be mineralizer the magnesium Metal smelting already.
Claims (7)
1. a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction of the present invention mainly comprises: shaft furnace, infrared spectrometer, scanning electron microscope, coal water slurry jar, burn chew, calorifier, Feng Zui, computer form the white system of forging; Raymond mill, batching microcomputer, two roller ball press, feed appliance, dehumidification drying kiln are formed levigate pressure and are rolled into a ball system; Vertical reducing jar, reduction furnace, computer are formed restoring system; Coal water slurry jar, high pressure pump for mortar transmission, burn chew, calorifier, Feng Zui, electrical header, computer form fuel combustion system; Opening chilled water tank, water circulating pump, cooling-water temperature sensor, electrical header are formed water cooling system; Afterheat steam tubular boiler, vapor can, pressure transmitter are formed thermal cycling and are utilized system; Jet vacuum pump, vacuum tank, electrical header, vacuum pressure sensor are formed pumped vacuum systems; High pressure positive blower, corrugated tube, slag discharging pipe, ageing pond, building block press are formed slag encapsulation process system; Overhead traveling crane, electric block, lifting robot arm are formed location Lift-on/Lift-off System automatically; Air channel, grid mouth, blast regulator, sack cleaner, depression dust-removing device are formed dust-removal system; Two chambers continuous refining furnace, argon tanks, solvent tank, pig moulding machine, computer are formed rectification systems; Infrared spectrometer, scanning electron microscope, temperature sensor, pressure transmitter, vacuum pressure sensor, electrical header tandem are formed automatic control system at computer interface; Its principal character is: shaft furnace has preheating, calcining, cools off three sections functions automatically, automatic blanking, and infrared spectrometer, scanning electron microscope are installed in the calcining section, form to forge white automatic on-line detection; Raymond mill is levigate granularity 400 orders, two roller ball press pressure 200Mpa; Around the reduction furnace heating chamber bottom be provided with coal water slurry burn chew, wind chews, the top is provided with temperature sensor, reduction jar vertical double being installed on the reduction furnace, upper and lower end exposure reduction furnace, opening encapsulation lid is established in the lower end, during slagging-off and sylphon seal connect, the outside, upper end is provided with watercooling jacket, vacuum-pumping tube, in establish magnesium crystallizer, sodium potassium trap, thermal baffle, sealing cover is established on the top; The coal water slurry tank is provided with steel hot water overcoat outward; The jet vacuum pump front end is provided with the high pressure steam jar, and the rear end is provided with vacuum tank; The opening chilled water tank embeds underground; Overhead traveling crane is equipped with 4 lifting robot arms across two reduction furnaces; Corrugated tube, sliding dreg tube are hermetically sealed system, and slag flows into the ageing pond automatically under the high pressure wind effect; The refining shielding gas is an argon gas; Computer controlled automatic shaft furnace, reduction furnace, refining furnace, circulating water temperature, reduction jar, vacuum tank vacuum tightness, afterheat steam tubular boiler, high pressure steam pressure tank, electrical header.
2. a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction according to claim 1, it is characterized in that: described shaft furnace calcining section kiln body is the Clad Steel structure, middle kiln lining adds the cast-in-place moulding of refractory material ageing with high-temperature flame-proof soil, steel bushing is a high temperature steel in the kiln body, be coated with high temperature resistant far ultrared paint, porcelainization with kiln lining contact surface heat.
3. a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction according to claim 1 and 2, it is characterized in that: be provided with high temperature steel combustion barrel with holes in the middle of the described shaft furnace burning zone, be provided with in the combustion barrel many coal water slurry burn chew, wind chews, combustion barrel internal surface heat is coated with high temperature resistant far ultrared paint, porcelainization.
4. a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction according to claim 1 and 2 is characterized in that: the automatic cooling section of described shaft furnace is made of the funnel-form cyclic water jacket, and the cyclic water jacket bottom is provided with the self-emptying mouth.
5. a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction according to claim 1 is characterized in that: described reduction furnace furnace lining adds the cast-in-place moulding of refractory material ageing for high-temperature flame-proof soil, and after the drying, furnace lining internal surface heat is coated with high temperature resistant far ultrared paint, porcelainization.
6. a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction according to claim 1, it is characterized in that: described reduction jar thermal baffle is the fixedly center of circle and the detachably wrong hole of cylindrical diaphragm structure, fixedly the center of circle and the welding suitable for reading of slotting tube are fixed, inserting the tube lower end is the liftable cylindrical shell, by fixedly center of circle screw rod adjustment lifting, inserting tube is fin structure, and the fin outer wing contacts with a reduction jar inwall, inserts a tube lower end and reduction jar lower end bell internal diameter and coincide.
7. according to claim 1 or 6 described a kind of magnesium refining method with vertical kiln vertical pot silicon heat reduction, it is characterized in that: described reduction jar is coated with high temperature resistant far ultrared paint, porcelainization at reduction furnace heating section outer surface heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100844118A CN101245416B (en) | 2008-03-21 | 2008-03-21 | Magnesium refining method with vertical kiln vertical pot silicon heat reduction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100844118A CN101245416B (en) | 2008-03-21 | 2008-03-21 | Magnesium refining method with vertical kiln vertical pot silicon heat reduction |
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| Publication Number | Publication Date |
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| CN101245416A CN101245416A (en) | 2008-08-20 |
| CN101245416B true CN101245416B (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100844118A Expired - Fee Related CN101245416B (en) | 2008-03-21 | 2008-03-21 | Magnesium refining method with vertical kiln vertical pot silicon heat reduction |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812599B (en) * | 2010-03-18 | 2011-08-31 | 吉林大学 | Method for preparing metal magnesium by using dolomite as raw material |
| CN103397204A (en) * | 2013-07-03 | 2013-11-20 | 宁夏鹏程致远自动化技术有限公司 | Novel insulation baffle of magnesium crystallizer |
| CN104946906B (en) * | 2015-06-15 | 2017-01-25 | 东北大学 | Thermal reduction magnesium smelting device and method integrated with calcination and reduction |
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