CN102766715A - Slag-free production process of ilmenite - Google Patents
Slag-free production process of ilmenite Download PDFInfo
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- CN102766715A CN102766715A CN2012102796882A CN201210279688A CN102766715A CN 102766715 A CN102766715 A CN 102766715A CN 2012102796882 A CN2012102796882 A CN 2012102796882A CN 201210279688 A CN201210279688 A CN 201210279688A CN 102766715 A CN102766715 A CN 102766715A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a slag-free production process of ilmenite, which comprises the following steps: a) preparing a mixed raw material by ilmenite, red mud and coal according to a ratio; b) drying and pre-reducing the mixed raw material in a rotary kiln; c) melting the reduced material in a melting and separating furnace and separating iron from the slag; and d) entering high-aluminum titanium clinkers discharged by an outlet of the high-aluminum titanium clinkers to into a quenching tank, and carrying out solid-liquid separation to obtain the solid light metal oxides of silicon, calcium, magnesium, aluminum and titanium. The production process has the following advantages that sodium/potassium alkali and fluorides in the red mud play a role in catalyzing and fluxing in the reduction reaction of ilmenite and carbon, so that the separation of iron and titanium is fast and thorough, and the harmful substances in the red mud are effectively utilized; at the same time, sodium/potassium alkali and fluorides are evaporated as gas, and recycled after being cooled; the yield of elemental iron reaches 99% or more; the light metal oxides of aluminum, titanium, silicon, calcium, magnesium and the like are subjected to a conventional process so as to obtain alumina (titanium, silicon, calcium, magnesium and the like); and the red mud becomes an indispensable industrial raw material, and harm is turned into benefit, thereby realizing the slag-free production process of ilmenite.
Description
Technical field
The invention belongs to the Metal smelting technical field, be specifically related to a kind of no slag production technique of ilmenite.
Background technology
In the prior art, the production technique of using ilmenite to produce titanium oxide is, ilmenite added carbon make ball, gets into electric furnace through sintering, with temperature be controlled at 1600 ℃～more than 1800 ℃ even 1800 ℃,, realize that slag iron separates through carbon reduction, high-temperature fusion.The upper strata obtains titanium slag, and lower floor obtains heating molten steel.Because this kind method need consume a large amount of electric energy, and produces a large amount of waste gas, promptly running cost is quite high, pollutes very big.
The staple of red mud is: aluminum oxide 10%～35%; Red stone 20%～55%; Silicon oxide 5%～25%; Sodium oxide (potassium) 7%～13%; Loss on ignition 10%～15%; Titanium oxide, Natural manganese dioxide, quicklime, fluorochemical etc. 5%～10%.The contaminative waste residue of discharging when it is Aluminium industry extraction aluminum oxide, its pH value is very high, and the pH value of leach liquor is 12.1～13.0.China is alumina producing big country, and the red mud of annual discharging is up to tens million of tons, and about seven, 80,000,000 tons of the annual red mud that produces in the whole world.Relevant industries are stored up it always, have both taken a large amount of soils, again soil, water source, atmosphere etc. are polluted.The sodium salt content safety range at water source is 30～400mg/L, and the sodium salt degree of wastewater from red mud is up to 26348mg/L, and the wastewater from red mud of high sodium salt degree like this gets into water body, and its pollution is self-evident.Also there is not economically viable method at present, with the red mud resource utilization, turn bane into boon.
Summary of the invention
The technical problem that the present invention will solve is: overcome the deficiency of prior art, a kind of no slag production technique of ilmenite is provided, it can separate each element in ilmenite, the red mud fully and utilize, turns bane into boon, and running cost is very low, economic benefit is very high.
The technical solution adopted for the present invention to solve the technical problems is: a kind of no slag production technique of ilmenite is characterized in that: comprise the steps: a) according to a certain percentage ilmenite, red mud, coal to be processed mixed raw material; B) above-mentioned mixed raw material is joined in the rotary kiln,, generate the reducing material that is the semi-melting state through oven dry, prereduction; C) above-mentioned reducing material is joined molten the branch in the stove, carry out fusion, the separation of slag iron; The high alumina titanium grog on upper strata is discharged by the ripe titanium material outlet of high alumina, and the heating molten steel of lower floor is flowed out by the heating molten steel outlet; D) the high alumina titanium grog of high alumina titanium grog outlet discharge gets in the watch-quench tank; Through solid-liquid separation, obtain solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound.
Preferably, in the said step a), said ilmenite, red mud mix according to weight ratio 1: 0.5～2.5; The weight of coal be ilmenite and red mud mixture gross weight 20%～50%.
Preferably, in the said step a), mixed raw material also includes lime, promptly according to a certain percentage ilmenite, red mud, lime, coal is processed mixed raw material.
Preferably, said ilmenite, red mud mix according to weight ratio 1: 0.5～2.5; The weight of lime, coal be respectively ilmenite and red mud mixture gross weight 5%～25%, 20%～50%.
Preferably, in the said step b), rotary kiln temperature is 800～1460 degree Celsius; Mixed raw material is dried in rotary kiln, the time of prereduction is 2～10 hours; In the said step c), reducing material enters into molten the branch in the stove through 1～4 hour by rotary kiln through enclosed passage, carries out fusion, slag iron separates; The high alumina titanium grog on upper strata is discharged by the outlet of high alumina titanium grog, and the heating molten steel of lower floor is flowed out by the heating molten steel outlet; In the said step d), the high alumina titanium grog that the high alumina outlet is discharged gets in the watch-quench tank; Through solid-liquid separation, obtain solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound.
Preferably, in the said step b), the temperature in the rotary kiln from the afterbody to the head edges up to 1460 degree from 800 degree Celsius.
Preferably, in the said step c), said molten minute furnace head installed at least one gas gun, and the muzzle of gas gun is towards said molten minute stove afterbody, to reducing material heat, fusion; Melt and divide the interior temperature of stove at 1450～1700 degree Celsius, reducing material through 1～4 hour, carries out fusion in molten branch stove, slag iron separates.
Preferably, in the said step c), furnace head was installed three gas guns in said molten minute; At said molten minute stove afterbody at least one gas gun is installed, the muzzle of all gas guns is all towards molten blanking place that divides the stove afterbody, to reducing material heat, fusion.
Preferably; Also comprise the steps: e) the molten high-temperature gas that divides in the stove, get into rotary kiln through enclosed passage, the flue gas that gives off from the exhanst gas outlet of rotary kiln afterbody; Behind waste heat boiler, obtain hot steam, the gravitational dust collection chamber bottom waste heat boiler obtains alkali and sodium salt (or sylvite); Again through water curtain dedusting alkali absorption tower; Further absorb waste gas such as sulfur in smoke, fluorine, arsenic; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Preferably, in the said step a), said ilmenite, red mud mix according to weight ratio at 1: 1; The weight of coal be ilmenite and red mud mixture gross weight 40%.
Preferably, in the said step a), said ilmenite, red mud mix according to weight ratio at 1: 1; The weight of lime, coal be respectively ilmenite and red mud mixture gross weight 10%, 30%.
Compared with prior art; The invention has the beneficial effects as follows: in the reduction reaction of ilmenite, red mud and carbon; Because red mud contains sodium/potash and a spot of fluorochemical more than 10%, makes ilmenite under lower temperature, just can decompose, and is reduced to fe and multivalence titanium oxide.Sodium/potash wherein, fluorochemical have played the catalysis fluxing action in the reduction reaction of ilmenite and carbon, make that the isolating speed of ferrotianium is fast and reaction is thorough, and objectionable impurities sodium/potash, fluorochemical in the red mud are effectively utilized.Simultaneously, sodium/potash, fluorochemical evaporate with the form of gas, recycle through cooling; Iron obtains fe through the molten stove that divides at iron notch, and yield can be up to more than 99%; Light metal oxide compounds such as aluminium, titanium, silicon, calcium, magnesium obtain from high alumina titanium outlet, through shrend, grinding, acidleach go out, operation such as solid-liquid separation obtains aluminum oxide (titanium, silicon, calcium, magnesium) etc.; This just makes the objectionable impurities as industrial residue---red mud, becomes indispensable industrial raw material, turns bane into boon, and has realized the no slag production technique of ilmenite.
Description of drawings
Fig. 1 is the structural representation of the device of embodiment of the present invention.
Be labeled as among the figure:
1, rotary kiln; 11, exhanst gas outlet; 12, waste heat boiler; 13, water curtain dedusting alkali absorption tower; 2, the molten stove that divides; 21, heating molten steel outlet; 22, high alumina titanium grog outlet; 23, gas gun; 3, watch-quench tank; 4, enclosed passage.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention done further describing:
High alumina titanium grog is the mixture that contains light metals such as aluminum oxide, silicon-dioxide, quicklime, titanium oxide, Natural manganese dioxide; Enclosed passage is built into by refractory materials.
Referring to Fig. 1, the device that is used for embodiment of the present invention is described.Need to prove that embodiment of the present invention is not limited to the device of Fig. 1.
During installation, rotary kiln 1, molten stove 2, the residing position of watch-quench tank 3 threes divided reduce successively, and their each own heads (or bottom) are all low with respect to the height of its afterbody (or top), that is: the head of rotary kiln 1 is lower slightly than its afterbody; The molten afterbody of stove 2 that divides is lower than the head of rotary kiln 1, but is higher than the molten head that divides stove 2; The top of watch-quench tank 3 is lower than the molten head that divides stove 2, but is higher than the bottom of watch-quench tank 3.
As shown in Figure 1, the device of embodiment of the present invention process method comprises rotary kiln 1, the molten stove 2 that divides, and enclosed passage 4 is communicated with said molten minute stove 2 afterbodys with said rotary kiln 1 head; Said molten minute stove 2 head downsides are provided with heating molten steel outlet 21, and said molten minute stove 2 head upsides are provided with high alumina titanium grog outlet 22; Said heating molten steel outlet 21 is lower than said high alumina titanium grog outlet 22; Export above in the of 22 at said molten minute stove 2 head, said high alumina titanium grog, three gas guns 23 are installed, the muzzle of said gas gun 23 was towards said molten minute stove 2 afterbodys; Be provided with three gas guns 23 at said molten minute stove 2 afterbodys, the muzzle of said gas gun 23 is all towards blanking place of said molten minute stove 2 afterbodys; Export below 22 at said molten minute stove 2 head, said high alumina, be provided with watch-quench tank 3; Said rotary kiln 1 afterbody is provided with exhanst gas outlet 11, and the exhanst gas outlet 11 of said rotary kiln 1 is communicated with water curtain dedusting alkali absorption tower 13 through waste heat boiler 12.
Embodiment one
As shown in Figure 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 2.5 according to weight ratio, mix; Get coal according to 50% of the gross weight of ilmenite and red mud mixture, mix after their are pulverized, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, afterbody rises to 1460 degree to the temperature of head from 800 degree Celsius gradually in the control rotary kiln 1; Through 2 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1450 degree Celsius, reducing material through 4 hours, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Again via water curtain dedusting alkali absorption tower 13; Further absorb waste gas such as sulfur in smoke, fluorine, arsenic; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment two
Referring to Fig. 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 1.5 according to weight ratio, mix; Get coal according to 35% of the gross weight of ilmenite and red mud mixture, mix after their are pulverized, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 5 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1500 degree Celsius, reducing material through 3 hours, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Absorb waste gas such as sulfur in smoke, fluorine, arsenic via water curtain dedusting alkali absorption tower 13 again; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment three
Referring to Fig. 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 1 according to weight ratio, mix; Get coal according to 30% of the gross weight of ilmenite and red mud mixture, mix after their are pulverized, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 7 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1600 degree Celsius, reducing material through 2 hours, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, and solid-liquid separation obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Again via water curtain dedusting alkali absorption tower 13; Further absorb waste gas such as sulfur in smoke, fluorine, arsenic; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment four
Referring to Fig. 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 0.5 according to weight ratio, mix; Get coal according to 20% of the gross weight of ilmenite and red mud mixture, mix after their are pulverized, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 10 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1700 degree Celsius, reducing material through 1 hour, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, and solid-liquid separation obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Absorb waste gas such as sulfur in smoke, fluorine, arsenic via water curtain dedusting alkali absorption tower 13 again; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment five
As shown in Figure 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 2 according to weight ratio, mix; Get coal according to 35% of the gross weight of ilmenite and red mud mixture, mix after their are pulverized, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, afterbody rises to 1460 degree to the temperature of head from 800 degree Celsius gradually in the control rotary kiln 1; Through 2 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1450 degree Celsius, reducing material through 4 hours, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Again via water curtain dedusting alkali absorption tower 13; Further absorb waste gas such as sulfur in smoke, fluorine, arsenic; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment six
As shown in Figure 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 2.5 according to weight ratio, mix; Get lime, coal according to 5%, 20% of the gross weight of ilmenite and red mud mixture respectively, they are mixed, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 2 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1450 degree Celsius, reducing material through 4 hours, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Again via water curtain dedusting alkali absorption tower 13; Further absorb waste gas such as sulfur in smoke, fluorine, arsenic; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment seven
Referring to Fig. 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 1.5 according to weight ratio, mix; Get lime, coal according to 10%, 30% of the gross weight of ilmenite and red mud mixture respectively, they are mixed, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 5 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1500 degree Celsius, reducing material through 3 hours, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, obtains light metal oxide compounds such as solid silicon, calcium, magnesium, aluminium, titanium;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Absorb waste gas such as sulfur in smoke, fluorine, arsenic via water curtain dedusting alkali absorption tower 13 again; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment eight
Referring to Fig. 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 1 according to weight ratio, mix; Get lime, coal according to 20%, 40% of the gross weight of ilmenite and red mud mixture respectively, they are mixed, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 7 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1600 degree Celsius, reducing material through 2 hours, carries out fusion in molten branch stove 2, slag iron separates; The high alumina on upper strata is discharged by high alumina outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, and solid-liquid separation obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Again via water curtain dedusting alkali absorption tower 13; Further absorb waste gas such as sulfur in smoke, fluorine, arsenic; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment nine
Referring to Fig. 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 0.5 according to weight ratio, mix; Get lime, coal according to 25%, 50% of the gross weight of ilmenite and red mud mixture respectively, they are mixed, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 10 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1700 degree Celsius, reducing material through 1 hour, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, and solid-liquid separation obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Absorb waste gas such as sulfur in smoke, fluorine, arsenic via water curtain dedusting alkali absorption tower 13 again; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
Embodiment ten
Referring to Fig. 1, a kind of no slag production technique of ilmenite comprises the steps:
A) get ilmenite, red mud at 1: 2 according to weight ratio, mix; Get lime, coal according to 15%, 35% of the gross weight of ilmenite and red mud mixture respectively, they are mixed, process mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln 1, the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 10 hours oven dry, prereduction, generate the reducing material that is the semi-melting state;
C), enter into molten the branch in the stove 2 through enclosed passage 4 with the discharge port of above-mentioned reducing material by rotary kiln 1; Head at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 all divides stove 2 afterbodys towards molten, to reducing material heat, fusion; Afterbody at said molten minute stove 2 is installed three gas guns 23, and the muzzle of gas gun 23 is all towards molten blanking place that divides stove 2 afterbodys, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1700 degree Celsius, reducing material through 1 hour, carries out fusion in molten branch stove 2, slag iron separates; The high alumina titanium grog on upper strata is discharged by high alumina titanium grog outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21;
D) the high alumina titanium grog of high alumina titanium grog outlet 22 discharges gets into watch-quench tank 3, and solid-liquid separation obtains solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound;
E) moltenly divide the high-temperature gases in the stove 2 to get into rotary kilns 1 through enclosed passage 4, the flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtains alkali and sodium salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Absorb waste gas such as sulfur in smoke, fluorine, arsenic via water curtain dedusting alkali absorption tower 13 again; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (11)
1. the no slag production technique of an ilmenite is characterized in that: comprise the steps:
A) according to a certain percentage ilmenite, red mud, coal are processed mixed raw material;
B) above-mentioned mixed raw material is joined in the rotary kiln,, generate the reducing material that is the semi-melting state through oven dry, prereduction;
C) above-mentioned reducing material is joined molten the branch in the stove, carry out fusion, the separation of slag iron; The high alumina titanium grog on upper strata is discharged by the ripe titanium material outlet of high alumina, and the heating molten steel of lower floor is flowed out by the heating molten steel outlet;
D) the high alumina titanium grog of high alumina titanium grog outlet discharge gets in the watch-quench tank; Through solid-liquid separation, obtain solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound.
2. the no slag production technique of ilmenite according to claim 1 is characterized in that: in the said step a), said ilmenite, red mud mix according to weight ratio 1: 0.5～2.5; The weight of coal be ilmenite and red mud mixture gross weight 20%～50%.
3. the no slag production technique of ilmenite according to claim 1, it is characterized in that: in the said step a), mixed raw material also includes lime.
4. the no slag production technique of ilmenite according to claim 3 is characterized in that: said ilmenite, red mud mix according to weight ratio 1: 0.5～2.5; The weight of lime, coal be respectively ilmenite and red mud mixture gross weight 5%～25%, 20%～50%.
5. according to the no slag production technique of claim 2 or 4 described ilmenites, it is characterized in that:
In the said step b), rotary kiln temperature is 800～1460 degree Celsius; Mixed raw material is dried in rotary kiln, the time of prereduction is 2～10 hours;
In the said step c), reducing material enters into molten the branch in the stove through 1～4 hour by rotary kiln through enclosed passage, carries out fusion, slag iron separates; The high alumina titanium grog on upper strata is discharged by the outlet of high alumina titanium grog, and the heating molten steel of lower floor is flowed out by the heating molten steel outlet;
In the said step d), the high alumina titanium grog that the high alumina outlet is discharged gets in the watch-quench tank; Through solid-liquid separation, obtain solid silicon, calcium, magnesium, aluminium, titanium light metal oxide compound.
6. the no slag production technique of ilmenite according to claim 5 is characterized in that: in the said step b), the temperature in the rotary kiln from the afterbody to the head edges up to 1460 degree from 800 degree Celsius.
7. the no slag production technique of ilmenite according to claim 6 is characterized in that: in the said step c), furnace head was installed at least one gas gun in said molten minute, and the muzzle of gas gun is towards said molten minute stove afterbody, to reducing material heat, fusion; Melt and divide the interior temperature of stove at 1450～1700 degree Celsius, reducing material through 1～4 hour, carries out fusion in molten branch stove, slag iron separates.
8. the no slag production technique of ilmenite according to claim 7 is characterized in that: in the said step c), furnace head was installed three gas guns in said molten minute; At said molten minute stove afterbody at least one gas gun is installed, the muzzle of all gas guns is all towards molten blanking place that divides the stove afterbody, to reducing material heat, fusion.
9. the no slag production technique of ilmenite according to claim 8 is characterized in that, also comprises the steps:
E) the molten high-temperature gas that divides in the stove gets into rotary kiln through enclosed passage, and the flue gas from the exhanst gas outlet of rotary kiln afterbody gives off obtains hot steam behind waste heat boiler, obtains alkali and sodium salt (or sylvite) by the gravitational dust collection chamber of waste heat boiler bottom; Again through water curtain dedusting alkali absorption tower; Further absorb waste gas such as sulfur in smoke, fluorine, arsenic; Make it to be dissolved in alkali and generate water-soluble sodium salt (or sylvite), promptly generate the mixing liquid that comprises S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).
10. the no slag production technique of ilmenite according to claim 2 is characterized in that: in the said step a), said ilmenite, red mud mix according to weight ratio at 1: 1; The weight of coal be ilmenite and red mud mixture gross weight 40%.
11. the no slag production technique of ilmenite according to claim 4 is characterized in that: in the said step a), said ilmenite, red mud mix according to weight ratio at 1: 1; The weight of lime, coal be respectively ilmenite and red mud mixture gross weight 10%, 30%.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103468940A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Cold-pressing iron coke composite pellet adhesive and preparation method thereof |
| CN107190138A (en) * | 2017-06-08 | 2017-09-22 | 江苏省冶金设计院有限公司 | A kind of method and device that manganese-silicon is prepared using poor ferrous manganese ore |
| WO2017202119A1 (en) * | 2016-05-23 | 2017-11-30 | 中国恩菲工程技术有限公司 | Reduction smelting system and reduction smelting method for vanadium-titanium magnetite ore or ilmenite |
| AU2018256247B2 (en) * | 2017-04-19 | 2020-11-12 | Korea Institute Of Geoscience And Mineral Resources | Method for smelting ilmenite using red mud |
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| CN1805903A (en) * | 2003-06-16 | 2006-07-19 | 利兹大学 | Extraction process for reactive metal oxides |
| CN102344982A (en) * | 2011-09-04 | 2012-02-08 | 胡长春 | Process for preparing hot molten iron and byproducts by utilizing red mud |
| CN102515219A (en) * | 2011-11-05 | 2012-06-27 | 胡长春 | Slag-free production process for extracting aluminum oxide and reduced iron by using bauxite one-step method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1805903A (en) * | 2003-06-16 | 2006-07-19 | 利兹大学 | Extraction process for reactive metal oxides |
| CN102344982A (en) * | 2011-09-04 | 2012-02-08 | 胡长春 | Process for preparing hot molten iron and byproducts by utilizing red mud |
| CN102515219A (en) * | 2011-11-05 | 2012-06-27 | 胡长春 | Slag-free production process for extracting aluminum oxide and reduced iron by using bauxite one-step method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468940A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Cold-pressing iron coke composite pellet adhesive and preparation method thereof |
| WO2017202119A1 (en) * | 2016-05-23 | 2017-11-30 | 中国恩菲工程技术有限公司 | Reduction smelting system and reduction smelting method for vanadium-titanium magnetite ore or ilmenite |
| AU2018256247B2 (en) * | 2017-04-19 | 2020-11-12 | Korea Institute Of Geoscience And Mineral Resources | Method for smelting ilmenite using red mud |
| CN107190138A (en) * | 2017-06-08 | 2017-09-22 | 江苏省冶金设计院有限公司 | A kind of method and device that manganese-silicon is prepared using poor ferrous manganese ore |
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