TW202033771A - Combined smelting of molten slags and residuals from stainless steel and ferrochromium works - Google Patents
Combined smelting of molten slags and residuals from stainless steel and ferrochromium works Download PDFInfo
- Publication number
- TW202033771A TW202033771A TW109106471A TW109106471A TW202033771A TW 202033771 A TW202033771 A TW 202033771A TW 109106471 A TW109106471 A TW 109106471A TW 109106471 A TW109106471 A TW 109106471A TW 202033771 A TW202033771 A TW 202033771A
- Authority
- TW
- Taiwan
- Prior art keywords
- slag
- metal
- stainless steel
- electric arc
- arc furnace
- Prior art date
Links
- 239000002893 slag Substances 0.000 title claims abstract description 60
- 229910000604 Ferrochrome Inorganic materials 0.000 title claims abstract description 21
- 239000010935 stainless steel Substances 0.000 title claims abstract description 21
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 21
- 238000003723 Smelting Methods 0.000 title abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 229910044991 metal oxide Inorganic materials 0.000 claims description 20
- 150000004706 metal oxides Chemical class 0.000 claims description 20
- 239000000428 dust Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 238000010891 electric arc Methods 0.000 claims description 12
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 5
- 239000013618 particulate matter Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 4
- 239000003830 anthracite Substances 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- -1 scale Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims 1
- 239000003546 flue gas Substances 0.000 claims 1
- 238000010310 metallurgical process Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 12
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 238000003672 processing method Methods 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000003923 scrap metal Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/02—Working-up flue dust
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
-
- 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
- C21C5/005—Manufacture of stainless steel
-
- 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
-
- 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
- C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/20—Arc remelting
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
-
- 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
- C21C2200/00—Recycling of waste material
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Ceramic Engineering (AREA)
- Analytical Chemistry (AREA)
- Structural Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
本發明涉及一種用於冶煉含金屬及含金屬氧化物的側流的方法，該等側流諸如是在不鏽鋼及鉻鐵廠產生的熔渣及廢料。本發明的製程方法是用於來自述及的工業領域的所有側流及殘渣的冶煉製程。這些流主要在液相中經處理以節省能源。The present invention relates to a method for smelting metal-containing and metal-oxide-containing side streams, such as slag and waste produced in stainless steel and ferrochrome plants. The process method of the present invention is used for the smelting process of all side streams and residues from the mentioned industrial fields. These streams are mainly processed in the liquid phase to save energy.
在使用電弧爐的鋼鐵工業中，會生產大量的含金屬氧化物的粉塵。這種粉塵產生了處置問題，因其包含大量的金屬，這些金屬妨礙了垃圾填埋場傾倒。另外，廢料金屬代表經濟損失。除了粉塵外，工業中還會產生一些含金屬的廢料流，這些廢料流為金屬回收及降低環境衝擊提供了契機。In the steel industry that uses electric arc furnaces, a large amount of metal oxide-containing dust is produced. This dust creates disposal problems because it contains large amounts of metals, which prevent dumping in landfills. In addition, scrap metal represents economic loss. In addition to dust, some metal-containing waste streams are also generated in the industry. These waste streams provide opportunities for metal recycling and reduce environmental impact.
自1970年代起，南非發展了Enviroplas製程，用於處理冶金工業的熔渣及粉塵。典型的製程涉及一個直流電弧爐，該爐中添有不鏽鋼廠粉塵、無菸煤、助熔劑及鹼劑。產物是一種合金，例如含有超過90%的饋料Cr及Ni，以及可處置的熔渣。Since the 1970s, South Africa has developed the Enviroplas process to treat slag and dust in the metallurgical industry. A typical process involves a DC electric arc furnace, which is filled with stainless steel mill dust, anthracite, flux and alkali. The product is an alloy, for example, containing more than 90% of the feedstock Cr and Ni, and disposable slag.
歐洲專利號1 641 946 B揭示了一種在許多後續步驟中生產金屬合金熔體的方法，藉此將粉塵及熔渣循環到製程中以回收Cr及Ni。European Patent No. 1 641 946 B discloses a method of producing metal alloy melt in many subsequent steps, whereby dust and slag are recycled into the process to recover Cr and Ni.
當前，來自不鏽鋼生產及鉻鐵生產的側流分別在各種指定製程中進行處理。金屬回收廠以冷卻的形式處理熔渣；而金屬氧化物廢料，例如袋濾器的粉塵、鏽皮（scale）和汙泥通常在單獨的廢料冶煉廠進行處理或經填埋。側流輸出中始終存在一定量的金屬氧化物，但將這些流再次熔融以提升還原效果通常是無利可圖的。傳統上，藉機械金屬回收設備自熔渣流回收殘渣金屬，且一些金屬在處理後餘留在熔渣中。Currently, the side streams from stainless steel production and ferrochrome production are processed in various designated processes. Metal recycling plants treat molten slag in a cooled form; while metal oxide waste, such as bag filter dust, scale, and sludge, is usually processed in a separate waste smelter or landfilled. There is always a certain amount of metal oxide in the side stream output, but it is usually unprofitable to melt these streams again to improve the reduction effect. Traditionally, mechanical metal recovery equipment is used to recover residual metal from the slag stream, and some metal remains in the slag after processing.
在同一製程單元中，並無最先進的方法處理來自不鏽鋼生產及鉻鐵生產的液態熔渣。
表1：不鏽鋼及鉻鐵廠的粉塵、熔渣及鏽皮的平均化學分析（均以質量%計）
本發明由獨立項揭示的內容界定。較佳的具體實例在附屬項中闡述。The present invention is defined by the content disclosed in the independent item. Preferred specific examples are described in the appendix.
根據本發明，在電弧爐或轉爐中將諸如濾器粉塵、鏽皮及汙泥的金屬氧化物廢料與來自不鏽鋼及鉻鐵生產的液態熔渣一同熔融。一個重要的特點是以液相形式供應熔渣，從而顯著降低熔融及還原所需能量。According to the present invention, metal oxide scraps such as filter dust, scale, and sludge are melted together with liquid slag from stainless steel and ferrochrome production in an electric arc furnace or converter. An important feature is the supply of slag in liquid phase, which significantly reduces the energy required for melting and reduction.
定義definition
在本發明的上下文中，不鏽鋼熔渣是在廢料熔融、AOD/VOD轉換及鑄杓處理製程在不鏽鋼生產中產生的熔渣。
表2：典型不鏽鋼熔渣成分範圍
在本發明的上下文中，鉻鐵熔渣是在鉻鐵礦的鉻鐵冶煉操作中產生的熔渣。表2示出鉻鐵熔渣的典型組成範圍。In the context of the present invention, ferrochrome slag is the slag produced in the ferrochrome smelting operation of chromite. Table 2 shows the typical composition range of ferrochrome slag.
來自熔渣流及金屬氧化物廢料流的已處於熔融狀態的金屬氧化物藉高溫冶金還原成金屬以節省能源，從而提升冶煉的利潤率。The molten metal oxides from the slag stream and the metal oxide waste stream are reduced to metal by pyrometallurgy to save energy and improve the profitability of smelting.
與本發明相關的熔渣流是來自不鏽鋼及鉻鐵生產容器（電弧爐、轉爐、鑄杓處理）的所有熔渣，以及來自述及的金屬生產設備的其他含金屬或金屬氧化物的側流，例如二手耐火材料。與此創造相關的含金屬氧化物的側流是來自不鏽鋼及鉻鐵生產（例如，來自冶煉、熔融、研磨、熱軋與冷軋及酸再生設備）的含金屬氧化物、含硫酸鹽或含氫氧化物的氣體清潔粉塵、鏽皮及汙泥。The slag flow related to the present invention is all slag from stainless steel and ferrochrome production vessels (electric arc furnace, converter, ladle treatment), and other metal or metal oxide side streams from the mentioned metal production equipment , Such as second-hand refractory materials. The side streams of metal oxides related to this creation are metal oxides, sulfates, or sulphates from stainless steel and ferrochrome production (for example, from smelting, melting, grinding, hot and cold rolling, and acid regeneration equipment). Hydroxide gas cleans dust, scale and sludge.
本發明製程方法對金屬氧化物廢料與熔渣進料的冶煉進行組合。因此，金屬氧化物廢料流不需要單獨的製程單元。此組合製程不再需要對餘留在熔渣中的金屬進行傳統機械分離。當前製程方法生產作為輸出的純金屬合金及不含金屬的熔渣。The process method of the present invention combines the smelting of metal oxide waste and molten slag feed. Therefore, the metal oxide waste stream does not require a separate process unit. This combined process no longer requires traditional mechanical separation of the metal remaining in the slag. Current process methods produce pure metal alloys and metal-free slag as output.
冶煉（輸入能量以熔融物流並還原金屬氧化物）可在交流電或直流電弧爐中進行。若較佳使用轉爐，則也可使用化學能。Smelting (input energy to melt the stream and reduce metal oxides) can be carried out in AC or DC electric arc furnaces. If a converter is preferred, chemical energy can also be used.
金屬氧化物的還原以還原劑完成。有用的還原劑的實例為煤焦、無菸煤、石墨、甲烷、塑膠及橡膠。也可採用其他碳源。此外，可使用以矽及鋁為主的還原劑。The reduction of metal oxides is accomplished with a reducing agent. Examples of useful reducing agents are coal char, anthracite, graphite, methane, plastic, and rubber. Other carbon sources can also be used. In addition, reducing agents based on silicon and aluminum can be used.
在這種情況下，粉塵也可包括ZnO。用於根據本發明的方法的流可涉及最大尺寸為100mm的廢鋼鐵廠粉塵及顆粒物。In this case, the dust may also include ZnO. The stream used in the method according to the invention may involve scrap steel mill dust and particulate matter with a maximum size of 100 mm.
當使用根據本發明的方法時，作為金屬的鉻、鐵及鎳，其回收率通常超過90%。When using the method according to the present invention, the recovery rate of chromium, iron, and nickel as metals generally exceeds 90%.
根據本發明，藉由混合熔融的不鏽鋼熔渣（用作石灰源）及鉻鐵熔渣獲得用於Cr2 O3 還原的最佳熔渣鹼度。因此，不需要額外的石灰進料及熔體，從而節省了自然資源及能源。According to the present invention, the best slag basicity for Cr 2 O 3 reduction is obtained by mixing molten stainless steel slag (used as a lime source) and ferrochrome slag. Therefore, no additional lime feed and melt are required, thereby saving natural resources and energy.
根據本發明，提供一種用於生產鉻鐵合金的方法，該鉻鐵合金在多個連續且同步的方法步驟中較佳含有Cr、Ni及Mo： ● 在第一個方法步驟中，將熔融的不鏽鋼熔渣及熔融的鉻鐵熔渣自不鏽鋼及鉻鐵生產設備運到熔渣的處理廠。將熔渣送入電弧爐或轉爐，接著將液態不鏽鋼熔渣及鉻鐵熔渣進行自然混合。 ● 在第二個方法步驟中，還原能以電的形式供應給熔體，或在使用轉爐的具體實例中以化學能的形式供應給熔體。由於熔渣在運輸期間會稍微冷卻，因此還需要額外的能量以達到預期的熔體溫度。 ● 在第三個方法步驟中，將金屬氧化物廢料流及還原劑（較佳為無菸煤）引到熔體，並在最佳溫度下還原熔渣中的金屬氧化物。 ● 在第四個方法步驟中，使熔渣中還原的金屬滴沉降到金屬殘渣（heel）中。在金屬還原及沉降之後，從還原爐或容器中敲取出熔渣及金屬。 ● 在第五個方法步驟中，將經敲取出的金屬及熔渣冷卻成骨材形式或造粒成液滴狀顆粒。金屬合金還可立即在不鏽鋼生產設備中用作液體以節省能源。所生產的金屬合金可進一步用於金屬工業，且所生產的熔渣可進一步用於各種熔渣產物應用（主要用於土方工程）。According to the present invention, there is provided a method for producing a ferrochrome alloy, the ferrochrome alloy preferably contains Cr, Ni and Mo in a plurality of continuous and simultaneous method steps: ● In the first method step, the molten stainless steel slag and molten ferrochrome slag are transported from the stainless steel and ferrochrome production equipment to the slag treatment plant. The slag is fed into an electric arc furnace or a converter, and then the liquid stainless steel slag and ferrochrome slag are naturally mixed. ● In the second method step, the reducing energy is supplied to the melt in the form of electricity, or in the form of chemical energy in the specific example of using a converter. Since the slag cools slightly during transportation, additional energy is required to reach the expected melt temperature. ● In the third method step, the metal oxide waste stream and the reducing agent (preferably anthracite) are introduced to the melt, and the metal oxides in the slag are reduced at the optimal temperature. ● In the fourth method step, the metal droplets reduced in the molten slag are allowed to settle into the metal heel. After the metal is reduced and settled, knock out the slag and metal from the reduction furnace or container. ● In the fifth method step, the knocked out metal and molten slag are cooled into aggregate form or granulated into droplet particles. Metal alloys can also be used immediately as liquids in stainless steel production equipment to save energy. The produced metal alloy can be further used in the metal industry, and the produced slag can be further used in various slag product applications (mainly used in earthwork).
圖1示出使用容器將熔渣從金屬生產設備運到冶煉設備的方式。在一階段將液態熔渣送入冶煉爐，該階段等於熔渣生產量。此外，固態熔渣及固態金屬氧化物廢料流透過料槽自料倉送到爐中。電極可提供額外的能量以達到預期的還原溫度（金屬為1,500°C至1,600°C，而熔渣為1,600°C至1,700°C）。添加以碳為主的還原劑將金屬氧化物自熔渣層還原到金屬殘渣中。經還原的金屬滴的沉降速度或其他冶金參數可藉由熔渣添加劑（例如，石英及石灰）進行調整。在還原及沉降所生產的金屬合金之後，對爐輕敲。金屬合金既可在不鏽鋼生產中用作液體，也可製成金屬顆粒以用於金屬工業。冶煉爐生產的熔渣藉由空氣、水或氣體造粒，製成各種用途的熔渣產物。也可使用空氣冷卻生產熔渣骨材。所生產的熔渣不含金屬，且無需進一步金屬分離。Figure 1 shows the manner in which a container is used to transport molten slag from a metal production facility to a smelting facility. The liquid slag is sent to the smelting furnace in a stage, which is equal to the slag production volume. In addition, solid slag and solid metal oxide waste streams are sent from the silo to the furnace through the trough. The electrode can provide additional energy to reach the desired reduction temperature (1,500°C to 1,600°C for metals and 1,600°C to 1,700°C for slag). Adding a carbon-based reducing agent reduces the metal oxide self-melting slag layer to the metal residue. The settling rate of the reduced metal droplets or other metallurgical parameters can be adjusted by slag additives (for example, quartz and lime). After reducing and settling the produced metal alloy, tap the furnace. Metal alloys can be used as liquids in the production of stainless steel, and can also be made into metal particles for use in the metal industry. The molten slag produced by the smelting furnace is granulated by air, water or gas to make various slag products for various purposes. Air cooling can also be used to produce slag aggregates. The produced slag contains no metal and no further metal separation is required.
無no
參照附圖更詳細地說明本發明，其中， [圖1]示出對來自不鏽鋼及鉻鐵設備的含金屬及含金屬氧化物的殘渣進行組合處理的原理。The present invention will be explained in more detail with reference to the accompanying drawings, in which, Fig. 1 shows the principle of combined treatment of metal-containing and metal-oxide-containing residues from stainless steel and ferrochrome equipment.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20195153 | 2019-03-01 | ||
| FI20195153A FI20195153A1 (en) | 2019-03-01 | 2019-03-01 | Combined smelting of molten slags and residuals from stainless steel and ferrochromium works |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| TW202033771A true TW202033771A (en) | 2020-09-16 |
Family
ID=72337367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW109106471A TW202033771A (en) | 2019-03-01 | 2020-02-27 | Combined smelting of molten slags and residuals from stainless steel and ferrochromium works |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JP2022523397A (en) |
| KR (1) | KR20210134310A (en) |
| CN (1) | CN113366129A (en) |
| CA (1) | CA3129671A1 (en) |
| FI (2) | FI20195153A1 (en) |
| SE (1) | SE2150998A1 (en) |
| TW (1) | TW202033771A (en) |
| WO (1) | WO2020178480A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113265534B (en) * | 2021-04-14 | 2023-03-31 | 嘉峪关宏电铁合金有限责任公司 | Low-grade ferrochromium slag recycling production process |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA963234B (en) * | 1995-05-02 | 1996-07-29 | Holderbank Financ Glarus | Process for the production of hydraulic binders and/or alloys such as e g ferrochromium of ferrovanadium |
| AT405839B (en) * | 1996-01-17 | 1999-11-25 | Holderbank Financ Glarus | METHOD FOR PRODUCING RAW IRON, COLORED METAL ALLOYS, FECR AND SYNTHETIC BLAST FURNACE SLAGS USING METAL OXIDE CONTAINING WASTE COMBUSTION RESIDUES OR SLAGS |
| AT407263B (en) * | 1999-04-22 | 2001-02-26 | Holderbank Financ Glarus | METHOD FOR REPRODUCING STEEL SLAG |
| JP2001316712A (en) * | 2000-05-02 | 2001-11-16 | Nippon Steel Corp | Method for recovering chromium from chromium containing slag |
| AT412349B (en) * | 2003-06-25 | 2005-01-25 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING AN ALLOYED METAL MELT AND PRODUCTION PLANT THEREFOR |
| KR20050109763A (en) * | 2004-05-17 | 2005-11-22 | 주식회사 포스코 | Method for recovery valuable metals from steel-making slag of stainless steel |
| KR100793591B1 (en) * | 2006-12-28 | 2008-01-14 | 주식회사 포스코 | Method for reduction of metallic chromium from slag containing chromium oxide |
| CN107058677A (en) * | 2017-05-22 | 2017-08-18 | 山西太钢不锈钢股份有限公司 | A kind of smelting process of utilization stainless steel electroslag |
| CN108676942A (en) * | 2018-05-18 | 2018-10-19 | 廖辉明 | The materials such as a kind of iron content and/or zinc lead bronze tin cooperate with processing recovery method with molten steel slag |
-
2019
- 2019-03-01 FI FI20195153A patent/FI20195153A1/en not_active Application Discontinuation
-
2020
- 2020-02-27 TW TW109106471A patent/TW202033771A/en unknown
- 2020-02-28 KR KR1020217025564A patent/KR20210134310A/en unknown
- 2020-02-28 FI FI20217132A patent/FI20217132A1/en unknown
- 2020-02-28 SE SE2150998A patent/SE2150998A1/en unknown
- 2020-02-28 CA CA3129671A patent/CA3129671A1/en active Pending
- 2020-02-28 WO PCT/FI2020/050129 patent/WO2020178480A1/en active Application Filing
- 2020-02-28 CN CN202080012085.9A patent/CN113366129A/en active Pending
- 2020-02-28 JP JP2021551575A patent/JP2022523397A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FI20217132A1 (en) | 2021-08-26 |
| CA3129671A1 (en) | 2020-09-10 |
| JP2022523397A (en) | 2022-04-22 |
| WO2020178480A1 (en) | 2020-09-10 |
| KR20210134310A (en) | 2021-11-09 |
| FI20195153A1 (en) | 2020-09-02 |
| SE2150998A1 (en) | 2021-08-12 |
| CN113366129A (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110004352B (en) | Method for preparing copper-chromium-containing wear-resistant cast iron by utilizing reduction of molten depleted copper slag | |
| CN101736161B (en) | Method for comprehensively recovering tin smelting secondary raw materials by melting in DC furnace | |
| CN104805250B (en) | The process that a kind of high-temperature slag is continuously modified | |
| CN108278901A (en) | A kind of industrial furnace and production technology for smelting slag composition adjustment | |
| CN1813073A (en) | Method for producing an alloy molten metal and associated production plant | |
| CN109574504A (en) | A kind of method that utilization relates to weight dangerous waste slag preparation glass ceramics | |
| CN108285949A (en) | A kind of metal aluminium deoxidizer and preparation method thereof | |
| CN103243216A (en) | Sintering ore and production method thereof | |
| TW202033771A (en) | Combined smelting of molten slags and residuals from stainless steel and ferrochromium works | |
| Hanewald et al. | Processing EAF dusts and other nickel-chromium waste materials pyrometallurgically at INMETCO | |
| CN103924089A (en) | Method of melting stainless steel dust, slag and Cr-containing sludge | |
| CN103910530A (en) | Harmless treatment process for waste RH magnesite-chrome brick | |
| CN105200237A (en) | Process method for regenerating and recycling aluminum scrap resources | |
| Schweers et al. | A pyrometallurgical process for recycling cadmium containing batteries | |
| CN102851512B (en) | Method for producing iron alloy through vanadium extraction tailing reduction smelting | |
| JP6451462B2 (en) | Method for recovering chromium from chromium-containing slag | |
| JP4932309B2 (en) | Chromium recovery method from chromium-containing slag | |
| JP2001073021A (en) | Flux for refining metal and production thereof | |
| CN104178599A (en) | Desulfuration residue modifier and desulfuration method of vanadium-titanium molten iron | |
| CN115044349A (en) | Non-metal abrasive for jet cleaning and preparation method thereof | |
| CN1063508A (en) | Containing chromium titanium nickel and vanadium waste residue and gangue detoxifcation comprehensive utilization | |
| CN105925756A (en) | Method for handling waste SCR denitration catalyst and waste oil-refining catalyst | |
| CN107250387A (en) | For improving the method on the titanium oxide content in the clinker produced by the electro-smelting of titanomagnetite | |
| CN106039863A (en) | Equipment system for treating lead, nitrogen and sulfur with electrolytic manganese anode slag | |
| TWI820222B (en) | A method for utilizing metal oxide containing side streams in ferrochrome smelting processes |