CN102686758A - Method for smelting high carbon ferrochromium - Google Patents
Method for smelting high carbon ferrochromium Download PDFInfo
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910000604 Ferrochrome Inorganic materials 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003723 Smelting Methods 0.000 title description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 31
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 20
- 239000011044 quartzite Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 9
- 230000002829 reductive effect Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000005058 metal casting Methods 0.000 claims 1
- 238000012856 packing Methods 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 239000011651 chromium Substances 0.000 abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 29
- 239000000377 silicon dioxide Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 10
- 230000009467 reduction Effects 0.000 abstract description 7
- 229910001021 Ferroalloy Inorganic materials 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- QDOXWKRWXJOMAK-UHFFFAOYSA-N chromium(III) oxide Inorganic materials O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052681 coesite Inorganic materials 0.000 abstract description 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract description 2
- 229910052682 stishovite Inorganic materials 0.000 abstract description 2
- 229910052905 tridymite Inorganic materials 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052596 spinel Inorganic materials 0.000 description 6
- 239000011029 spinel Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000571 coke Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 229910000423 chromium oxide Inorganic materials 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical group [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052566 spinel group Inorganic materials 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5264—Manufacture of alloyed steels including ferro-alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/32—Obtaining chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
- C21C2007/0062—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires with introduction of alloying or treating agents under a compacted form different from a wire, e.g. briquette, pellet
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
Description
技术领域 technical field
本发明涉及铁合金生产，确切地说，涉及在矿石熔炼电炉中的高碳铬铁生产的方法。This invention relates to the production of ferroalloys, in particular to a method for the production of high carbon ferrochrome in electric ore smelting furnaces.
背景技术 Background technique
迄今已知在矿石熔炼炉中的高碳铬铁生产的方法，其中炉料由铬矿石、碳还原剂和含硅石熔剂制备。该方法中使用10-80mm大小的矿石块和超过5mm的含碳还原剂的级分。炉料以分批操作供应到炉顶并且所产生的金属和炉渣从炉排出。金属在与炉渣分离之后从炉中排出到铸模中(Ryss M.A.Production of ferroalloys.-M.：Metallurgy，1985，199-212页)。Processes for the production of high-carbon ferrochrome in ore smelting furnaces are known so far, in which the charge is prepared from chromium ore, a carbon reducing agent and a silica-containing flux. Ore chunks of size 10-80mm and fractions of carbonaceous reducing agent over 5mm are used in the process. Furnace charge is supplied to the furnace roof in a batch operation and the resulting metal and slag are discharged from the furnace. The metal is discharged from the furnace into molds after separation from the slag (Ryss M.A. Production of ferroalloys.-M.: Metallurgy, 1985, pp. 199-212).
该方法的特征如下：The method is characterized as follows:
高碳铬铁熔炼方法中铬还原的速率低，原因是硅石铬矿石含有30-35％Cr2O3和10-20％SiO2。在熔炼温度下，氧化硅在铬矿石块的表面上形成粘性膜，其阻止氧化铬与碳还原剂以及气态一氧化碳的相互作用。硅石熔剂通过阻碍矿石铬尖晶石与碳还原剂和气态CO的接触而增强了铬矿石的氧化硅的作用。铬矿石的难熔铬尖晶石中的铬不与氧化硅形成铬可从其中被还原的任何液体相。由于从铬尖晶石的铬还原的钝化反应，其在炉浴的较上层不被还原。固体矿石颗粒以相当大的量被供应到底层，并被从炉流出的液体矿渣卷带。The rate of chromium reduction in the high carbon ferrochromium smelting process is low because the silica chromium ore contains 30-35% Cr 2 O 3 and 10-20% SiO 2 . At smelting temperatures, the silicon oxide forms a sticky film on the surface of the chrome ore lumps, which prevents the interaction of the chromium oxide with the carbon reducing agent and gaseous carbon monoxide. Silica flux enhances the silica action of chromium ore by hindering the contact of ore chromium spinel with carbon reducing agents and gaseous CO. The chromium in the refractory chromium spinel of the chrome ore does not form any liquid phase with the silica from which the chromium can be reduced. Due to the passivation reaction of chromium reduction from chrome spinel, it is not reduced in the upper layers of the furnace bath. Solid ore particles are supplied to the bottom layer in considerable quantities and are entrained by the liquid slag flowing from the furnace.
铬从铬矿石还原的机理在于，固体焦炭在其接触铬矿石块的点处与构成这种矿石的铁和氧化铬反应。在加热过程中，碳扩散到整个铬尖晶石体积中，形成气态CO、铬和碳化铁。巧合地，焦炭与铬矿石接触的区域富含多孔岩石的难熔氧化物(SiO2、MgO、Al2O3)，主要为SiO2，从而在焦炭与铬尖晶石之间产生所谓的炉渣-金属屏障，在该屏障处铬还原的速率急剧降低。The mechanism of chromium reduction from chrome ore is that the solid coke reacts with the iron and chromium oxides that make up this ore at the point where it contacts the chrome ore mass. During heating, carbon diffuses throughout the chromium spinel volume, forming gaseous CO, chromium, and iron carbide. Coincidentally, the area where the coke comes into contact with the chromium ore is rich in refractory oxides (SiO 2 , MgO, Al 2 O 3 ) of porous rock, mainly SiO 2 , thus creating the so-called slag between the coke and the chrome spinel - A metal barrier where the rate of chromium reduction is drastically reduced.
在矿石熔炼炉的铬铁熔炼过程中，在添加有含硅石熔剂的炉料中铬从硅石铬矿石还原的低速率导致熔炼处理时间增加、用于铬铁熔炼比功率消耗过量以及炉渣获得率增加。During ferrochrome smelting in ore smelting furnaces, the low rate of chromium reduction from silica-chrome ore in charge with silica-containing fluxes leads to increased smelting process time, excess specific power consumption for ferrochrome smelting and increased slag yield.
已知有一种铬铁熔炼的方法，其中使用尺寸为10-80mm的铬矿石级分、超过5mm的含碳还原剂的级分以及呈自生产的炉渣-金属废料形式的含硅石熔剂作为炉料组分。炉料在电炉中熔炼，产生铬铁和炉渣(RyssM.A.Production of ferroalloys.-M.：Metallurgy，1985，第199-212页)。A process for ferrochrome smelting is known, in which a fraction of chrome ore with a size of 10-80 mm, a fraction of carbon-containing reducing agent exceeding 5 mm and a silica-containing flux in the form of self-produced slag-metal scrap are used as charge groups point. The charge is smelted in an electric furnace, producing ferrochrome and slag (Ryss M.A. Production of ferroalloys.-M.: Metallurgy, 1985, pp. 199-212).
该方法的特征如下：The method is characterized as follows:
由于在使用由铬矿石、碳还原剂和熔剂组成的炉料的矿石熔炼炉中高碳铬铁生产过程中发生的低速率亚铬酸盐-还原剂反应造成废渣中高含量的氧化铬，这些低速率的反应是由硅石熔剂以及由铬矿石中存在的多孔岩石的硅石排出的亚铬酸盐导致的。Due to the high content of chromium oxide in the waste slag due to the low rate chromite-reductant reaction that occurs during the production of high carbon ferrochrome in ore smelting furnaces using a charge consisting of chromium ore, carbon reducer and flux, these low rate The reaction is caused by silica flux and chromite expelled from the silica of the porous rock present in the chrome ore.
硅石铬矿石的使用导致炉浴上层内在铬尖晶石颗粒上的炉渣屏障的形成。而且，铬尖晶石具有较高的熔炼温度，并且它们因其与硅石的低速率反应而著称，这就是铬矿石与硅石熔剂一起加热造成难以形成铬可以从中被还原的液相的原因。The use of silica chrome ore leads to the formation of a slag barrier on the chrome spinel grains in the upper layer of the furnace bath. Also, chromium spinels have high melting temperatures and they are known for their low rate of reaction with silica, which is why heating chromium ore with silica flux makes it difficult to form a liquid phase from which chromium can be reduced.
在矿石熔炼炉中的铬铁生产过程中从含有30-33％铬和10-20％SiO2的硅石铬矿石还原铬的低速率导致用于铬铁熔炼的熔炼过程时间增加以及比功率消耗过量。该情形被诸如以下的因素促进：在高碳铬铁熔炼的过程中，铬矿石颗粒对于形成到炉浴底层中的CO变得不可渗透。Low rate of chromium reduction from silica chromium ore containing 30-33% chromium and 10-20% SiO2 during ferrochrome production in ore smelting furnaces leads to increased smelting process time for ferrochrome smelting and excessive specific power consumption . This situation is facilitated by factors such as during the smelting of high carbon ferrochrome, the chromium ore particles become impermeable to the CO formed into the bottom layer of the furnace bath.
与要求保护的本发明最接近等同的过程是高碳铬铁熔炼的方法(RF专利号2115627，IPC C01G37/00、C22B 1/00、C 22B 1/16，1998)。The closest equivalent process to the claimed invention is the method of high-carbon ferrochrome smelting (RF Patent No. 2115627, IPC C01G37/00, C22B 1/00, C 22B 1/16, 1998).
该方法包括装有以wt％计的如下组分比率的尺寸为10-80mm的铬矿石块、尺寸超过5mm的含碳还原剂级分、高碳铬铁生产的炉渣-金属废料以及低碳铬铁生产的炉渣的电炉：The process comprises chromium ore nuggets of size 10-80mm, carbonaceous reductant fractions of size over 5mm, slag-metal scrap from high-carbon ferrochrome production and low-carbon chrome, charged with the following component ratios in wt%. Electric furnaces with slags for iron production:
炉料被装入矿石熔炼电炉中，在炉浴中提供1.5-2.5m的层深。炉料由含有以wt％计的以下组分构成：31-33-Cr2O3；15-17-SiO2；含有86％碳的焦炭，熔剂：高碳铬铁生产的炉渣-金属废料含有以wt％计的50-SiO2；20-MgO；10-Al2O3；20-高碳铬铁的金属夹杂物，含有以wt％计40-50CaO；25-30SiO2；5-15Cr2O3；4-5Al2O3；8-12MgO；1-3FeO的低碳铬铁的炉渣。炉料组分被供应到电炉料斗中。以分批操作将炉料装到炉顶上，主要在出渣以及在炉料安放炉顶上之后。用电加热的炉料被熔炼，形成金属和炉渣，后者被规律性地排出。The charge is loaded into the ore smelting electric furnace, providing a layer depth of 1.5-2.5m in the furnace bath. The charge consists of the following components in wt %: 31-33-Cr 2 O 3 ; 15-17-SiO 2 ; coke containing 86% carbon, flux: slag from high carbon ferrochrome production - metal scrap containing 50-SiO 2 in wt%; 20-MgO; 10-Al 2 O 3 ; 20-Metallic inclusions of high carbon ferrochrome containing 40-50CaO in wt%; 25-30SiO 2 ; 5-15Cr 2 O 3 ; 4-5Al 2 O 3 ; 8-12MgO; 1-3FeO low carbon ferrochrome slag. The charge components are supplied into the electric furnace hopper. The charge is loaded onto the furnace roof in a batch operation, mainly after slag tapping and after the charge has been placed on the roof. The electrically heated charge is smelted to form metal and slag, the latter being discharged regularly.
该方法的特征在于以下：必须对细级分进行初筛，并且仅使用大的炉料组分块，这造成相当多的细级分积累并导致环境恶化。This method is characterized by the fact that the fine fraction has to be pre-screened and only large charge component chunks are used, which leads to a considerable accumulation of the fine fraction and leads to environmental degradation.
而且，含有约30％Cr2O3的精铬矿石的使用导致矿渣获得率增加以及比炉容量降低。Also, the use of refined chrome ore containing about 30% Cr2O3 resulted in increased slag yield and reduced specific furnace capacity.
发明内容 Contents of the invention
本发明解决的问题涉及在生产过程中使用按尺寸材料的等外品：尺寸小于10mm的铬矿石块和尺寸小于5mm的含碳还原剂的级分。The problem solved by the present invention concerns the use of off-grade material by size in the production process: chrome ore chunks with a size of less than 10 mm and fractions of carbonaceous reducing agents with a size of less than 5 mm.
所实现的工程进展涉及在生产过程中使用按尺寸材料的等外品：铬矿石和含碳还原剂，以及涉及改善生态状况。The engineering advances achieved relate to the use of off-grade materials in the production process: chrome ore and carbonaceous reducing agents, and to the improvement of the ecological situation.
为了达到上述目的，以1∶(0.3-0.5)的比率混合尺寸小于10mm的铬矿石块的级分(尺寸过小的矿石)以及含碳还原剂的级分(尺寸小于5mm)，并然后将他们供应到压块机中。以25-50MPa压力生产压块。使用含有以wt％计：44.0-56.0-Cr2O3；4.0-12.0-SiO2的尺寸过小的铬矿石以及含有86％固体碳的含碳还原剂。For the above purpose, the fraction of chrome ore lumps with a size smaller than 10 mm (undersized ore) and the fraction of carbonaceous reducing agent (less than 5 mm in size) are mixed in a ratio of 1: (0.3-0.5) and then mixed with They are fed into a briquetting machine. The briquette is produced at a pressure of 25-50MPa. An undersized chromium ore containing in wt%: 44.0-56.0-Cr 2 O 3 ; 4.0-12.0-SiO 2 and a carbonaceous reducing agent containing 86% solid carbon was used.
然后，将生产的压块装入料斗中，并从料斗供应到电炉中。石英岩被供应到其中，以提供以wt％计的如下压块/石英岩比：Then, the produced briquettes are loaded into a hopper and supplied from the hopper into an electric furnace. Quartzite is supplied thereto to provide the following briquette/quartzite ratios in wt %:
压块 93.7-96.2Briquetting 93.7-96.2
石英岩 3.8-6.3Quartzite 3.8-6.3
总计为100％。Total is 100%.
将制备的压块与石英岩的混合物熔炼，从而产生铬铁与炉渣。The mixture of prepared briquettes and quartzite is smelted to produce ferrochrome and slag.
压块中铬矿石与碳还原剂的共存有助于碳还原剂在铁与铬还原过程中的有效使用，所述铁与铬还原过程在这些压块内部在相反应的多重形成表面内进行。The coexistence of chromium ore and carbon reducing agent in the briquettes facilitates the efficient use of the carbon reducing agent in the iron and chromium reduction process that takes place within these briquettes within the phase-reacting multiple forming surfaces.
具体实施方式 Detailed ways
实施例1Example 1
使用尺寸小于10mm的尺寸过小的铬矿石块级分，含有以wt％计的44.0-Cr2O3；4.0-SiO2。将该矿石与含有86％固体碳的0-5mm级分的碳还原剂混合。将混合物润湿并在25-50MPa压力制成压块。以1∶0.3的比率使用混合物组分。将压块与石英岩一起装入电炉中，以wt％计：An undersized chrome ore nugget fraction with a size of less than 10 mm was used, containing 44.0-Cr 2 O 3 ; 4.0-SiO 2 in wt%. The ore was mixed with a carbon reducer in the 0-5mm fraction containing 86% solid carbon. The mixture is wetted and pressed into briquettes at 25-50 MPa. The mixture components were used in a ratio of 1:0.3. The briquettes are loaded into the electric furnace together with the quartzite, in wt%:
压块 93.7Briquetting 93.7
石英岩 6.3Quartzite 6.3
将混合物熔炼，从而产生铬铁和炉渣。The mixture is smelted, producing ferrochrome and slag.
实施例2Example 2
使用含有以wt％计的56-Cr2O3；12.0-SiO2的铬矿石(0-10mm级分)。将该矿石与含有86％固体碳的0-5mm级分的碳还原剂混合。将混合物润湿并在25-50MPa压力制成压块。以1∶0.5的比率使用混合物组分。将生产的压块与石英岩一起装入电炉中，以wt％计：Chromium ore (0-10 mm fraction) containing 56-Cr 2 O 3 ; 12.0-SiO 2 in wt % was used. The ore was mixed with a carbon reducer in the 0-5mm fraction containing 86% solid carbon. The mixture is wetted and pressed into briquettes at 25-50 MPa. The mixture components were used in a ratio of 1:0.5. The briquettes produced are charged into an electric furnace together with quartzite, in wt %:
压块 96.2Briquetting 96.2
石英岩 3.8Quartzite 3.8
将混合物熔炼，从而产生铬铁和炉渣。The mixture is smelted, producing ferrochrome and slag.
由此，所提出的方法增强了熔炼过程的技术和经济性能，并解决了环境改善的问题。Thus, the proposed method enhances the technical and economical performance of the smelting process and addresses the issue of environmental improvement.
Claims (3)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KZ2010/1327.1 | 2010-10-27 | ||
| KZ20101327 | 2010-10-27 | ||
| PCT/KZ2011/000006 WO2012057593A1 (en) | 2010-10-27 | 2011-04-07 | Method for melting high-carbon ferrochrome |
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| CN102686758A true CN102686758A (en) | 2012-09-19 |
| CN102686758B CN102686758B (en) | 2014-07-09 |
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| CN (1) | CN102686758B (en) |
| EA (1) | EA016426B1 (en) |
| FI (1) | FI20126085A (en) |
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| EA030670B1 (en) * | 2016-05-20 | 2018-09-28 | Фазыл Каюмович ШАДИЕВ | Method for producing briquettes for ferrochrome production |
| CN115161469A (en) * | 2022-07-21 | 2022-10-11 | 山西太钢万邦炉料有限公司 | Production method of high-proportion south Africa chromium ore pellets |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215522A (en) * | 1960-11-22 | 1965-11-02 | Union Carbide Corp | Silicon metal production |
| GB1024692A (en) * | 1962-01-24 | 1966-03-30 | Techmet Ltd | Production of ferro-chrome alloys |
| RU2008150098A (en) * | 2008-12-17 | 2010-06-27 | Государственное учреждение Институт металлургии Уральского отделения Российской Академии наук (ГУ ИМЕТ УрО РАН) (RU) | MIXTURE FOR PRODUCING A HIGH-CARBON FERROCHROME |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053307A (en) * | 1976-01-16 | 1977-10-11 | Showa Denko K. K. | Process for manufacture of high-chromium iron alloy |
| RU2083693C1 (en) * | 1995-06-01 | 1997-07-10 | Акционерное общество закрытого типа "Урал-ВИМ" | Method of manufacturing chromium briquets for producing ferrochrome |
| RU2115627C1 (en) * | 1997-05-06 | 1998-07-20 | Открытое акционерное общество Челябинский электрометаллургический комбинат | Blend for preparing high carbon ferrochrome |
| RU2241057C1 (en) * | 2003-04-09 | 2004-11-27 | ОАО "Серовский завод ферросплавов" | Batch for producing of high-carbon ferrochrome |
-
2011
- 2011-04-07 CN CN201180004528.0A patent/CN102686758B/en active Active
- 2011-04-07 UA UAA201205093A patent/UA103121C2/en unknown
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- 2011-04-07 WO PCT/KZ2011/000006 patent/WO2012057593A1/en not_active Ceased
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215522A (en) * | 1960-11-22 | 1965-11-02 | Union Carbide Corp | Silicon metal production |
| GB1024692A (en) * | 1962-01-24 | 1966-03-30 | Techmet Ltd | Production of ferro-chrome alloys |
| RU2008150098A (en) * | 2008-12-17 | 2010-06-27 | Государственное учреждение Институт металлургии Уральского отделения Российской Академии наук (ГУ ИМЕТ УрО РАН) (RU) | MIXTURE FOR PRODUCING A HIGH-CARBON FERROCHROME |
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| EA201101615A1 (en) | 2012-04-30 |
| CN102686758B (en) | 2014-07-09 |
| EA016426B1 (en) | 2012-04-30 |
| WO2012057593A1 (en) | 2012-05-03 |
| FI20126085A7 (en) | 2012-10-18 |
| UA103121C2 (en) | 2013-09-10 |
| FI20126085A (en) | 2012-10-18 |
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