CN112624136A - Method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by additive - Google Patents
Method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by additive Download PDFInfo
- Publication number
- CN112624136A CN112624136A CN202011482119.9A CN202011482119A CN112624136A CN 112624136 A CN112624136 A CN 112624136A CN 202011482119 A CN202011482119 A CN 202011482119A CN 112624136 A CN112624136 A CN 112624136A
- Authority
- CN
- China
- Prior art keywords
- boron
- rich slag
- slag
- additive
- rich
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002893 slag Substances 0.000 title claims abstract description 103
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 229910052796 boron Inorganic materials 0.000 title claims abstract description 95
- 239000000654 additive Substances 0.000 title claims abstract description 39
- 230000000996 additive effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000009257 reactivity Effects 0.000 title claims abstract description 16
- 238000002425 crystallisation Methods 0.000 title claims abstract description 15
- 230000008025 crystallization Effects 0.000 title claims abstract description 15
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 150000001638 boron Chemical class 0.000 claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 10
- 239000012141 concentrate Substances 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 238000010791 quenching Methods 0.000 claims abstract description 6
- 230000000171 quenching effect Effects 0.000 claims abstract description 6
- 238000011049 filling Methods 0.000 claims abstract description 4
- 238000010309 melting process Methods 0.000 claims abstract description 4
- 238000011946 reduction process Methods 0.000 claims abstract description 4
- 239000000292 calcium oxide Substances 0.000 claims description 14
- 239000000395 magnesium oxide Substances 0.000 claims description 12
- 229910000514 dolomite Inorganic materials 0.000 claims description 8
- 239000010459 dolomite Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 239000001095 magnesium carbonate Substances 0.000 claims description 7
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 7
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 7
- 235000019738 Limestone Nutrition 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052682 stishovite Inorganic materials 0.000 claims description 6
- 229910052905 tridymite Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 17
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052810 boron oxide Inorganic materials 0.000 abstract description 7
- 229910001730 borate mineral Inorganic materials 0.000 abstract description 3
- 239000010429 borate mineral Substances 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 20
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 12
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 241000345998 Calamus manan Species 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 210000004127 vitreous body Anatomy 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
- C01B35/10—Compounds containing boron and oxygen
- C01B35/12—Borates
- C01B35/126—Borates of alkaline-earth metals, beryllium, aluminium or magnesium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
- C01B35/10—Compounds containing boron and oxygen
- C01B35/12—Borates
- C01B35/121—Borates of alkali metal
- C01B35/122—Sodium tetraborates; Hydrates thereof, e.g. borax
- C01B35/123—Preparation from boron ores or other borates
Abstract
A method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using an additive comprises the following steps: (1) filling molten boron-rich slag generated in the reduction and melting process of the boron-containing iron concentrate into a slag pot reactor, and simultaneously adding an additive; (2) introducing compressed air into the slag pot reactor through an air inlet pipe at the bottom of the slag pot reactor, and aerating and stirring the boron-rich slag and the additive to fully mix the boron-rich slag and the additive for reaction to obtain a reaction material in the slag pot reactor; (3) carrying out water quenching on the reaction materials and cooling to room temperature; (4) and taking out the water quenched material and then crushing to obtain the activated boron-rich slag. According to the invention, the boron oxide in the boron-rich slag is strengthened to form the crystalline borate mineral, so that the precipitation of glassy boron oxide is reduced, the chemical reaction activity of the boron-rich slag is obviously improved, the process is simple, the existing large-scale equipment can be directly utilized, and the industrial operation is easy to realize.
Description
Technical Field
The invention belongs to the technical field of mineral processing, and particularly relates to a method for enhancing boron crystallization and synergistically improving reaction activity of boron-rich slag by using an additive.
Background
Boron is called industrial monosodium glutamate, is an important chemical raw material and is widely applied to various industrial fields. At present, the paigeite can realize the primary separation of the paigeite by using a beneficiation method, and the boron concentrate can be directly used as a qualified raw material of boron chemical industry; the secondary separation of ferroboron in the boron-containing iron concentrate is mainly carried out by pyrogenic reduction and melting separation to obtain boron-containing pig iron and boron-rich slag; but the reaction activity of the boron-rich slag is low, and the leaching rate of boron is not high and is only about 50 percent; therefore, the key to the utilization of the boron in the boron-containing iron concentrate lies in how to obtain the high-activity boron-rich slag to meet the requirement of subsequent processing and utilization.
The invention provides a method for improving activity of boron-rich slag (CN201410035869.X), which is characterized in that TiO with the fineness of 60-80 meshes and the mass fraction of 3.5-4.5% respectively is used2And 2.5 to 3.5% of ZrO2Stirring and mixing the boron-rich slag and the crushed boron-rich slag with the granularity of 10-40 meshes, heating the mixture to 1510-1550 ℃, melting the mixture for 2-3 hours, cooling the mixture at the cooling speed of 80-100 ℃/hour until the temperature is lower than 850 ℃, taking the cooled mixture out of the furnace, and air-cooling the cooled mixture to room temperature to obtain a boron-rich slag product with high activity; the method has high raw material cost and needs to add expensive TiO2And ZrO2And the melting temperature is high, the time is long, and a large amount of energy is consumed.
The invention discloses a low-cost activation process method of boron-rich slag (201610821940.6). in the method, the boron-rich slag is heated to 1400-1450 ℃ to be melted, and then is poured into a slag pot made of refractory materials to be slowly cooled at room temperature, and the cooling speed is controlled at 10-20 ℃/min; slowly cooling the boron-rich slag to 1150-1050 ℃, opening a slag tank, pouring the high-temperature solid boron-rich slag into a closed water tank for rapid quenching, and filtering and drying to obtain the boron-rich slag with the activity of 87%; the method has high smelting temperature, and then the steel is rapidly cooled in a closed water quenching mode, and the cooling speed is difficult to control actually; meanwhile, the cooling system is complex, the production efficiency is influenced, and the large-scale industrial production is not facilitated.
Disclosure of Invention
Aiming at the problems of low activity, high production cost and the like of molten boron slag in the existing boron-rich slag treatment technology, the invention provides a method for enhancing boron crystallization by using an additive to improve the reaction activity of the boron-rich slag, wherein magnesite, limestone or dolomite is used as the additive to improve the reaction activity of the boron-rich slag, so that a large amount of boron resources in paigeite are effectively utilized.
The method of the invention is carried out according to the following steps:
1. filling molten boron-rich slag generated in the reduction and melting process of the boron-containing iron concentrate into a slag pot reactor, and simultaneously adding an additive; the molten boron-rich slag contains B in percentage by mass2O3 10～22％，MgO 25～55％，Al2O3 1～10％，SiO215-30% of CaO, 1-20% of CaO and 1350-1500 ℃ of temperature; the adding amount of the additive is 5-10% of the total mass of the molten boron-rich slag;
2. introducing compressed air into the slag pot reactor through an air inlet pipe at the bottom of the slag pot reactor, and aerating and stirring the boron-rich slag and the additive to fully mix the boron-rich slag and the additive for reaction to obtain a reaction material in the slag pot reactor;
3. pouring the reaction material into water, performing water quenching, cooling to room temperature, and obtaining a water quenched material in the water;
4. and taking out the water quenched material and then crushing to obtain the activated boron-rich slag.
In the step 2, the additive is prepared by grinding magnesite, limestone or dolomite, wherein the part with the grain diameter less than or equal to 0.1mm accounts for more than 60 percent of the total mass.
In the step 2, the amount of the air is 0.01-0.05 m per ton of the molten boron-rich slag3/min。
In the step 2, the flow velocity of the air is 1.0-1.5 m/s when the air is introduced.
In the step 2, the time of aeration stirring is 10-30 min.
In the step 2, the temperature of the reaction material after the reaction is finished is 1250-1400 ℃.
In the step 4, the mixture is crushed to a particle size of less than or equal to 1 mm.
In the step 4, the reactivity of the activated boron-rich slag is more than or equal to 85 percent.
The reaction in step 2 of the invention comprises thermal decomposition reaction and combination reaction, wherein the main reaction formula of the thermal decomposition reaction is as follows:
MgCO3＝MgO+CO2 (1)、
CaCO3＝CaO+CO2(2) and
CaMg(CO3)2＝CaO+MgO+2CO2 (3)；
the main reaction formula of the combination reaction is as follows:
2MgO+B2O3＝Mg2B2O5 (4)、
2CaO+B2O3＝Ca2B2O5 (5)、
3MgO+B2O3＝Mg3(BO3)2(6) and
3CaO+B2O3＝Ca3(BO3)2 (7)。
the basic principle of the invention is as follows: part of boron in the boron-rich slag obtained by reduction and melting is in a crystalline state of borate such as tunnel stone (Mg) without slow cooling treatment2B2O5) Or rattan stone (Mg)3(BO3)2) The boron has higher reactivity; 40-60% of boron forms amorphous vitreous bodies in the cooling process, the reaction activity is very low, and the glass is difficult to leach, extract and utilize; the invention adds magnesite, limestone or dolomite additive, the additive is decomposed at high temperature to obtain free magnesium oxide or calcium oxide, and the free magnesium oxide or calcium oxide reacts with boron oxide in boron slag at high temperature to form crystalline borate, further promote crystallization and reduce formation of glass state boron oxide; the boron-rich slag after the strengthening crystallization of the magnesium oxide and the calcium oxide has greatly improved chemical reaction activity because most of the boron oxide is converted into crystalline borate minerals in a slag pot reactor, and can be used for alkaline leachingAnd obtaining high-quality borax.
Compared with the prior art, the invention strengthens boron oxide in the boron-rich slag to form the crystalline borate mineral, reduces the precipitation of glassy boron oxide, obviously improves the chemical reaction activity of the boron-rich slag, has simple process, can directly utilize the existing large-scale equipment, and is easy to realize industrial operation.
Drawings
FIG. 1 is a schematic structural view of a slag pot reactor in an embodiment of the invention; in the figure, 1, a tank body, 2, a shell, 3, an air inlet pipe, 4, an air inlet main pipe, 5 and molten boron-rich slag.
Detailed Description
The slag pot reactor in the embodiment of the invention is shown in figure 1, and comprises a pot body 1 and an outer shell 2 outside the pot body, wherein a plurality of air inlet pipes 3 are inserted into the bottom plate of the pot body 1, each air inlet pipe 3 is simultaneously communicated with an air inlet main pipe 4 outside the pot body 1, and the air inlet main pipe 4 is communicated with an air compressor.
In the embodiment of the invention, the shell of the slag pot reactor is made of steel, and the pot body is made of refractory magnesia bricks.
In the embodiment of the invention, the method for testing the reaction activity comprises the following steps: finely grinding the activated boron-rich slag until the part with a particle size of-200 meshes accounts for more than 90% of the total mass, drying to remove water, weighing 5g of the boron-rich slag, adding the boron-rich slag and 50mL of NaOH solution with a mass concentration of 20% into a 250mL distillation flask; heating the distillation flask to slightly boil and refluxing, and performing alkaline hydrolysis for 2 hours; filtering while hot after the alkaline hydrolysis is finished, then washing a solid phase with water until a washing liquid is neutral, and drying to obtain alkaline hydrolysis residues; weighing to obtain the mass m of the alkaline hydrolysis residue2And assaying B in the alkaline hydrolysis residue2O3W in percentage by mass2The mass of the activated boron-rich slag before reaction is m1，B2O3W is the mass percentage of1According to X ═ 1- (m)2×w2)/m1×w1]X100%, and calculating to obtain the alkaline hydrolysis rate X of the activated boron-rich slag, namely the activity of the activated boron-rich slag.
The magnesite, the limestone and the dolomite in the embodiment of the invention are commercial industrial products.
In the embodiment of the invention, air is introduced during air inflation and stirringThe amount of the boron-rich slag is 0.01-0.05 m per ton of the molten boron-rich slag3And/min, wherein the flow speed of the air is 1.0-1.5 m/s when the air is introduced.
Example 1
Filling molten boron-rich slag generated in the reduction and melting process of the boron-containing iron concentrate into a slag pot reactor, and simultaneously adding an additive; the molten boron-rich slag contains B in percentage by mass2O3 20.09％，MgO 51.35％，Al2O3 2.55％，SiO219.45 percent, CaO1.52 percent and the temperature is 1500 ℃; the adding amount of the additive is 10 percent of the total mass of the molten boron-rich slag; the additive is prepared by grinding magnesite, wherein the part with the particle size less than or equal to 0.1mm accounts for 65 percent of the total mass;
introducing compressed air into the slag pot reactor through an air inlet pipe at the bottom of the slag pot reactor, and aerating and stirring the boron-rich slag and the additive for 30min to fully mix the boron-rich slag and the additive for reaction to obtain a reaction material in the slag pot reactor; the temperature of the reaction materials after the reaction is finished is 1400 ℃;
pouring the reaction material into water, performing water quenching, cooling to room temperature, and obtaining a water quenched material in the water;
and taking out the water-quenched material, and crushing to obtain activated boron-rich slag with the particle size of less than or equal to 1mm, wherein the reactivity of the activated boron-rich slag is 92%.
Example 2
The method is the same as example 1, except that:
(1) the molten boron-rich slag contains B in percentage by mass2O3 12.55％，MgO 33.01％，Al2O3 6.99％，SiO229.81 percent of CaO, 6.98 percent of CaO and 1350 ℃; the addition amount of the additive is 8 percent of the total mass of the molten boron-rich slag; the additive is prepared by grinding limestone, wherein the part with the grain diameter less than or equal to 0.1mm accounts for 70 percent of the total mass;
(2) the time of air-charging and stirring is 20min, and the temperature of the reaction materials after the reaction is finished is 1250 ℃;
(3) the reaction activity of the activated boron-rich slag is 85 percent.
Example 3
The method is the same as example 1, except that:
(1) the molten boron-rich slag contains B in percentage by mass2O3 11.78％，MgO 32.72％，Al2O3 7.41％，SiO227.11 percent of CaO, 17.92 percent of CaO and the temperature of 1400 ℃; the addition amount of the additive is 9 percent of the total mass of the molten boron-rich slag; the additive is prepared by grinding dolomite, wherein the part with the grain diameter less than or equal to 0.1mm accounts for 75 percent of the total mass;
(2) the time of air-charging and stirring is 10min, and the temperature of the reaction materials after the reaction is finished is 1300 ℃;
(3) the reaction activity of the activated boron-rich slag is 87%.
Example 4
The method is the same as example 1, except that:
(1) the molten boron-rich slag contains B in percentage by mass2O3 17.95％，MgO 41.20％，Al2O3 3.31％，SiO218.16 percent, CaO 1.66 percent and temperature of 1450 ℃; the addition amount of the additive is 5 percent of the total mass of the molten boron-rich slag; the additive is prepared by grinding dolomite, wherein the part with the grain diameter less than or equal to 0.1mm accounts for 75 percent of the total mass;
(2) the time of air-charging and stirring is 25min, and the temperature of the reaction materials after the reaction is finished is 1350 ℃;
(3) the reactivity of the activated boron-rich slag is 90%.
Claims (8)
1. A method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using an additive is characterized by comprising the following steps of:
(1) filling molten boron-rich slag generated in the reduction and melting process of the boron-containing iron concentrate into a slag pot reactor, and simultaneously adding an additive; the molten boron-rich slag contains B in percentage by mass2O3 10～22％，MgO 25～55％，Al2O3 1～10％，SiO215-30% of CaO, 1-20% of CaO and 1350-1500 ℃ of temperature; the adding amount of the additive is 5-10% of the total mass of the molten boron-rich slag;
(2) introducing compressed air into the slag pot reactor through an air inlet pipe at the bottom of the slag pot reactor, and aerating and stirring the boron-rich slag and the additive to fully mix the boron-rich slag and the additive for reaction to obtain a reaction material in the slag pot reactor;
(3) pouring the reaction material into water, performing water quenching, cooling to room temperature, and obtaining a water quenched material in the water;
(4) and taking out the water quenched material and then crushing to obtain the activated boron-rich slag.
2. The method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using additive according to claim 1, wherein in the step (2), the additive is prepared by grinding magnesite, limestone or dolomite, wherein the part with the particle size of less than or equal to 0.1mm accounts for more than 60% of the total mass.
3. The method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using the additive according to claim 1, wherein in the step (2), the amount of air introduced is 0.01-0.05 m per ton of molten boron-rich slag3/min。
4. The method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using the additive according to claim 1, wherein in the step (2), the flow velocity of air is 1.0-1.5 m/s when air is introduced.
5. The method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using the additive according to claim 1, wherein in the step (2), the time for aeration stirring is 10-30 min.
6. The method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using the additive according to claim 1, wherein in the step (2), the temperature of the reaction material after the reaction is finished is 1250-1400 ℃.
7. The method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag according to claim 1, wherein in the step (4), the boron-rich slag is pulverized to have a particle size of 1mm or less.
8. The method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by using the additive according to claim 1, wherein in the step (4), the reactivity of activated boron-rich slag is not less than 85%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011482119.9A CN112624136A (en) | 2020-12-16 | 2020-12-16 | Method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011482119.9A CN112624136A (en) | 2020-12-16 | 2020-12-16 | Method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112624136A true CN112624136A (en) | 2021-04-09 |
Family
ID=75313553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011482119.9A Pending CN112624136A (en) | 2020-12-16 | 2020-12-16 | Method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by additive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112624136A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2020083A (en) * | 1982-10-16 | 1984-04-19 | Foseco International Limited | (ca0 + a12oz) based fluxes for dephosphorising and/or desulphurising iron and steel in furnaces and continuous casting moulds |
| CN1115302A (en) * | 1994-07-27 | 1996-01-24 | 东北大学有色金属及化工研究开发中心 | Method for extracting B from B slag |
| US20050257644A1 (en) * | 2000-09-14 | 2005-11-24 | Nkk Corporation | Refining agent and refining method |
| CN101818244A (en) * | 2010-04-03 | 2010-09-01 | 大连理工大学 | Process method for calcified roasting of boron-rich slag |
| CN103864086A (en) * | 2014-01-24 | 2014-06-18 | 北京工业大学 | Method of producing borax by utilizing boron-rich slag |
| CN103880304A (en) * | 2014-01-24 | 2014-06-25 | 北京工业大学 | Method for improving activity of boron-rich slag |
| CN104928429A (en) * | 2015-07-02 | 2015-09-23 | 中冶东方工程技术有限公司 | Metallization reduction utilization method of paigeite |
| CN106431023A (en) * | 2016-09-13 | 2017-02-22 | 北京科技大学 | Low cost activation technique of boron-rich slag |
| CN108069434A (en) * | 2016-11-14 | 2018-05-25 | 中国科学院过程工程研究所 | A kind of method for carrying boron |
-
2020
- 2020-12-16 CN CN202011482119.9A patent/CN112624136A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2020083A (en) * | 1982-10-16 | 1984-04-19 | Foseco International Limited | (ca0 + a12oz) based fluxes for dephosphorising and/or desulphurising iron and steel in furnaces and continuous casting moulds |
| CN1115302A (en) * | 1994-07-27 | 1996-01-24 | 东北大学有色金属及化工研究开发中心 | Method for extracting B from B slag |
| US20050257644A1 (en) * | 2000-09-14 | 2005-11-24 | Nkk Corporation | Refining agent and refining method |
| CN101818244A (en) * | 2010-04-03 | 2010-09-01 | 大连理工大学 | Process method for calcified roasting of boron-rich slag |
| CN103864086A (en) * | 2014-01-24 | 2014-06-18 | 北京工业大学 | Method of producing borax by utilizing boron-rich slag |
| CN103880304A (en) * | 2014-01-24 | 2014-06-25 | 北京工业大学 | Method for improving activity of boron-rich slag |
| CN104928429A (en) * | 2015-07-02 | 2015-09-23 | 中冶东方工程技术有限公司 | Metallization reduction utilization method of paigeite |
| CN106431023A (en) * | 2016-09-13 | 2017-02-22 | 北京科技大学 | Low cost activation technique of boron-rich slag |
| CN108069434A (en) * | 2016-11-14 | 2018-05-25 | 中国科学院过程工程研究所 | A kind of method for carrying boron |
Non-Patent Citations (2)
| Title |
|---|
| WANG, G ET AL.: "New Separation Method of Boron and Iron from Ludwigite Based on Carbon Bearing Pellet Reduction and Melting Technology", 《ISIJ INTERNATIONAL》 * |
| 李杰等: "钙化焙烧对富硼渣活性的影响研究", 《化工矿物与加工》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101559953B (en) | Method for using high-temperature liquid silicon manganese alloy slag as raw material to produce cast stone | |
| CN102942303B (en) | A kind of utilize granite waste material to prepare high-strength wearable engineering devitrified glass and preparation method | |
| CN101433950B (en) | Method for preparing protecting residue from recovery refining slag | |
| Meng et al. | The recycling of leaded glass in cathode ray tube (CRT) | |
| KR20180125572A (en) | A method of melting and reducing iron by stirring vortex | |
| CN106045347B (en) | A kind of method for melting free calcium oxide in resolution converter slag | |
| CN106348626A (en) | Method for recovering converter molten steel slag to produce concrete admixture | |
| CN103952515A (en) | Method for recycling high-iron red mud as steelmaking slag former/dephosphorizing agent | |
| CN105731808A (en) | Method for preparing glass ceramics | |
| CN111850193A (en) | Online quenching and tempering device and method for slag discharging and cooling process of molten steel slag | |
| CN108754134A (en) | A kind of red mud comprehensive utilization process | |
| CN106148684A (en) | The method and system of comprehensive utilization red mud | |
| WO2022227184A1 (en) | Comprehensive utilization method for bottom-top composite blowing smelting reduction of high-iron red mud | |
| CN106399676A (en) | Method and system for processing red mud | |
| CN113415997A (en) | Method for preparing lead slag microcrystalline glass by oxidizing and tempering silicon-rich silicon slag | |
| CN103074484A (en) | Comprehensive treatment method of oolitic hematite containing phosphorus and red mud | |
| CN100543152C (en) | A kind of processing method of removing fine foreign matter in the molten steel | |
| CN101497515B (en) | Method for producing titanium slag wall material brick making | |
| CN112624136A (en) | Method for enhancing boron crystallization and synergistically improving reactivity of boron-rich slag by additive | |
| CN104651553B (en) | Steel slag modifier | |
| CN108558244B (en) | Device and method for preparing cement mixture by utilizing thermal state converter slag | |
| CN101818229A (en) | Foamed dephosphorization pellet and preparation method thereof | |
| CN107265866B (en) | It is a kind of using blast furnace cinder as Venus devitrified glass of main material and preparation method thereof | |
| CN109252011A (en) | A kind of vanadium-raising cooling agent and preparation method thereof and extraction vanadium method | |
| CN106565096A (en) | Method for preparing glass-ceramic by using carbide slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210409 |