TW202346607A - Granulation device, method for producing granulation sintering raw material, and method for producing sintered ore - Google Patents
Granulation device, method for producing granulation sintering raw material, and method for producing sintered ore Download PDFInfo
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- 239000002994 raw material Substances 0.000 title claims abstract description 160
- 238000005245 sintering Methods 0.000 title claims abstract description 103
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000005469 granulation Methods 0.000 title claims abstract description 25
- 230000003179 granulation Effects 0.000 title claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000007664 blowing Methods 0.000 claims abstract description 20
- 230000008021 deposition Effects 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 230000015271 coagulation Effects 0.000 claims abstract description 4
- 238000005345 coagulation Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 238000009825 accumulation Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 41
- 238000002156 mixing Methods 0.000 description 20
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 18
- 238000011068 loading method Methods 0.000 description 17
- 239000007789 gas Substances 0.000 description 16
- 230000035699 permeability Effects 0.000 description 16
- 235000012255 calcium oxide Nutrition 0.000 description 9
- 239000000292 calcium oxide Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 9
- 238000010793 Steam injection (oil industry) Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 239000003575 carbonaceous material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- 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
- C22B1/16—Sintering; Agglomerating
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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
- C22B1/16—Sintering; Agglomerating
- C22B1/20—Sintering; Agglomerating in sintering machines with movable grates
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- Life Sciences & Earth Sciences (AREA)
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Abstract
Description
本發明是有關於一種對燒結原料進行造粒的造粒裝置、造粒燒結原料的製造方法以及燒結礦的製造方法。The present invention relates to a granulating device for granulating sintered raw materials, a method for manufacturing granulated sintered raw materials, and a method for manufacturing sintered ore.
作為高爐用原料燒結礦一般是以鐵礦石粉、製鐵廠內回收粉、燒結礦篩下粉等含鐵原料、石灰石及白雲石等含CaO原料及焦炭粉或無煙煤等炭材料（固體燃料）為燒結原料，使用作為環形移動型燒結機的維-勞氏（Dwight-Lloyd）燒結機（以下，有時記載為「燒結機」）製造。將燒結原料裝入至燒結機的環形移動式的托盤中，形成裝入層。裝入層的厚度（高度）為400 mm～800 mm左右。其後，藉由設置於裝入層的上方的點火爐，對裝入層表層的炭材料進行點火。藉由經由配設於托盤下的風箱而將空氣向下方抽吸，使裝入層中的炭材料依次燃燒。所述燃燒隨著托盤的移動而逐漸向下層且向前方進行。藉由此時產生的燃燒熱，燒結原料燃燒、熔融，生成燒結塊。其後，所獲得的燒結塊在排礦部被破碎，利用冷卻器冷卻，並進行整粒而成為成品燒結礦。As raw materials for blast furnaces, sinter is generally made of iron-containing raw materials such as iron ore powder, recycled powder from iron-making plants, and sinter screening powder, CaO-containing raw materials such as limestone and dolomite, and carbon materials (solid fuels) such as coke powder or anthracite coal. It is a sintering raw material and is produced using a Dwight-Lloyd sintering machine (hereinafter, sometimes referred to as a "sintering machine") which is a circular moving sintering machine. The sintering raw materials are loaded into the annular movable tray of the sintering machine to form a loading layer. The thickness (height) of the loading layer is approximately 400 mm to 800 mm. Thereafter, the carbon material on the surface of the charging layer is ignited by an ignition furnace installed above the charging layer. By sucking air downward through a bellows arranged under the tray, the carbon materials loaded into the layers are burned sequentially. The combustion gradually proceeds downward and forward as the pallet moves. By the combustion heat generated at this time, the sintering raw material is burned and melted, and a sintered block is generated. Thereafter, the obtained sintered lumps are crushed in the ore discharging section, cooled by a cooler, and sized to become finished sintered ore.
在使用所述燒結機的燒結礦的製造中，已知有如下技術：藉由對燒結原料進行預熱乾燥來縮小裝入層的濕潤帶所佔的比例來提高裝入層的通氣性、提高燒結礦的生產性。例如，在專利文獻1中揭示了在對燒結原料進行造粒的造粒時吹入水蒸氣等蒸汽，對燒結原料進行加熱的造粒燒結原料的製造方法。根據專利文獻1，藉由一邊吹入水蒸氣一邊對燒結原料進行造粒，燒結原料被預熱乾燥，可提高裝入層的通氣性而提高燒結礦的生產率。
[現有技術文獻]
[專利文獻]
In the production of sintered ore using the above-described sintering machine, there is known a technique of preheating and drying the sintered raw material to reduce the proportion of the wet zone in the loading layer, thereby improving the air permeability of the loading layer and improving the Productivity of sinter. For example,
專利文獻1：國際公開2019/167888號Patent Document 1: International Publication No. 2019/167888
[發明所欲解決之課題][Problem to be solved by the invention]
專利文獻1所揭示的方法中，一邊吹入蒸汽一邊對燒結原料進行造粒，因此需要另外準備向燒結原料吹入的蒸汽。因此，存在由於準備蒸汽所需的成本而使燒結礦的製造成本上升的課題。另一方面，若可使用蒸汽有效率地對燒結原料進行加熱，則可削減使用的蒸汽的量，可抑制燒結礦的製造成本的上升。本發明是鑒於此種現有技術的課題而成，其目的在於提供一種向燒結原料吹入蒸汽而可有效率地對燒結原料進行加熱的造粒裝置、造粒燒結原料的製造方法以及使用該造粒燒結原料的製造方法的燒結礦的製造方法。
[解決課題之手段]
In the method disclosed in
用於解決所述課題的方法如下般。 [1]一種造粒裝置，對包含含鐵原料、含CaO原料及凝結材料的燒結原料進行造粒，所述造粒裝置具有：筒狀的滾筒，設置有用來投入所述燒結原料的投入口及用來排出經造粒的燒結原料的排出口，並以橫向為旋轉軸旋轉；蒸汽配管，在所述滾筒內，且僅設置於自所述投入口至所述投入口與所述排出口的中間位置之間的前半部分；以及多個噴嘴，連接於所述蒸汽配管並向所述燒結原料的堆積面噴出蒸汽，所述多個噴嘴設置成與所述燒結原料的堆積面相距500 mm以上。 [2]如[1]所述的造粒裝置，其中，所述多個噴嘴中的半數以上的噴嘴的蒸汽噴出方向以朝向所述排出口側的方式傾斜地設置，剩餘的噴嘴的蒸汽噴出方向以相對於所述燒結原料的堆積面垂直地噴出蒸汽的方式設置。 [3]如[1]或[2]所述的造粒裝置，其中，所述多個噴嘴的蒸汽噴出方向以隨著噴嘴的位置接近所述排出口而變大且朝向所述排出口側的方式傾斜地設置。 [4]一種造粒燒結原料的製造方法，使用造粒裝置，對包含含鐵原料、含CaO原料及凝結材料的燒結原料進行造粒，所述造粒燒結原料的製造方法中，所述造粒裝置具有筒狀的滾筒，所述筒狀的滾筒設置有用來投入所述燒結原料投入口及用來排出經造粒的燒結原料的排出口，並以橫向為旋轉軸旋轉，在所述滾筒內，且在自所述投入口至所述投入口與所述排出口的中間位置之間的前半部分，自與所述燒結原料的堆積面相距500 mm以上的位置向所述燒結原料吹入蒸汽，製成較不吹入所述蒸汽而造粒的造粒燒結原料高10℃以上的造粒燒結原料。 [5]如[4]所述的造粒燒結原料的製造方法，其中，吹入至所述燒結原料的總蒸汽量中的一半以上的蒸汽的噴出方向以朝向所述排出口側的方式傾斜地吹入。 [6]一種燒結礦的製造方法，使用如[4]或[5]所述的造粒燒結原料的製造方法，利用燒結機對經造粒的造粒燒結原料進行燒結而製造燒結礦。 [發明的效果] A method for solving the above problems is as follows. [1] A granulating device for granulating sintering raw materials including iron-containing raw materials, CaO-containing raw materials and coagulation materials, the granulating device having a cylindrical drum and an inlet for inputting the sintering raw materials. and a discharge port for discharging the granulated sintered raw materials, and rotates with the transverse direction as the axis of rotation; the steam pipe is in the drum and is only provided from the input port to the input port and the discharge port the front half between the intermediate positions; and a plurality of nozzles connected to the steam pipe and ejecting steam to the accumulation surface of the sintering raw material, the plurality of nozzles are arranged 500 mm away from the accumulation surface of the sintering raw material above. [2] The granulation device according to [1], wherein the steam ejection directions of more than half of the plurality of nozzles are inclined toward the discharge port side, and the steam ejection directions of the remaining nozzles are The steam is ejected perpendicularly to the deposition surface of the sintering raw material. [3] The granulation device according to [1] or [2], wherein the steam ejection direction of the plurality of nozzles becomes larger as the position of the nozzle approaches the discharge port and is toward the discharge port side. set up obliquely. [4] A method of manufacturing a granulated and sintered raw material, which uses a granulating device to granulate a sintered raw material containing an iron-containing raw material, a CaO-containing raw material and a coagulated material. In the method of manufacturing a granulated and sintered raw material, the granulating material is granulated. The granulation device has a cylindrical drum. The cylindrical drum is provided with an input port for inputting the sintering raw material and a discharge port for discharging the granulated sintering raw material. The cylindrical drum rotates with the transverse direction as the axis of rotation. When the drum is within, and in the first half between the input port and the intermediate position between the input port and the discharge port, blow the sintered raw material from a position more than 500 mm away from the accumulation surface of the sintered raw material. Steam is used to produce a granulated and sintered raw material that is 10° C. or higher higher than a granulated and sintered raw material that is granulated without blowing the steam. [5] The method for manufacturing a granulated sintering raw material according to [4], wherein the ejection direction of more than half of the total amount of steam blown into the sintering raw material is inclined toward the discharge port side. Blow in. [6] A method for producing sintered ore, which uses the method for producing granulated and sintered raw materials described in [4] or [5], and sinters the granulated granulated and sintered raw materials with a sintering machine to produce sintered ore. [Effects of the invention]
藉由使用本發明的造粒裝置，可向燒結原料吹入蒸汽而有效率地進行加熱，因此可削減造粒時使用的蒸汽的蒸汽原單元。藉由使用所述加熱後的造粒燒結原料，裝入層的通氣性提高，燒結礦的生產率提高，因此，藉由使用本發明的造粒裝置，可實現燒結礦的生產率的提高與燒結礦的製造成本上升的抑制。By using the granulation device of the present invention, steam can be blown into the sintering raw material and heated efficiently, so the steam source unit of the steam used during granulation can be reduced. By using the heated granulated and sintered raw material, the air permeability of the loading layer is improved and the productivity of sintered ore is improved. Therefore, by using the granulating device of the present invention, it is possible to improve the productivity of sintered ore and the sintered ore. suppression of rising manufacturing costs.
以下，通過發明的實施方式對本發明進行說明。圖1是表示具有作為本實施方式的造粒裝置的滾筒混合機32的燒結礦製造設備10的一例的示意圖。保管於場地11中的含鐵原料12藉由搬送輸送機14搬送至調配槽22。含鐵原料12包含各種品種的鐵礦石及製鐵廠內產生的粉塵。Hereinafter, the present invention will be described based on the embodiments of the invention. FIG. 1 is a schematic diagram showing an example of the
原料供給部20包括多個調配槽22、24、25、26、28。在調配槽22貯存有含鐵原料12。在調配槽24貯存有包含石灰石或生石灰等的含CaO原料16，在調配槽25貯存有包含白雲石或精煉鎳渣等的含MgO原料17。在調配槽26貯存有包含使用棒磨機破碎成粒徑1 mm以下的焦炭粉或無煙煤的凝結材料18。在調配槽28貯存有燒結礦的成為篩下的粒徑5 mm以下的返礦（燒結礦篩下粉）。自原料供給部20的調配槽22～調配槽28切出規定量的各原料，將該些調配而成為燒結原料。燒結原料藉由搬送輸送機30而搬送至滾筒混合機32。含MgO原料17是任意調配原料，可調配於燒結原料，亦可不調配。The raw
滾筒混合機32是一邊向燒結原料吹附蒸汽一邊進行造粒的造粒裝置。滾筒混合機32具有以橫向為旋轉軸旋轉的筒狀的滾筒33、蒸汽配管36、以及連接於蒸汽配管36並向燒結原料的堆積面噴出水蒸氣38的多個噴嘴37。再者，水蒸氣為蒸汽的一例。The
在筒狀的滾筒33，設置有投入口34及排出口35，所述投入口34設置於該滾筒33的一端面側，用來投入燒結原料，所述排出口35設置於滾筒33的另一端面側，用來排出經造粒的造粒燒結原料（以下，記載為擬似粒子）。蒸汽配管36在滾筒33內，且設置於成為自投入口34至投入口34與排出口35的中間位置之間的前半部分的區域。多個噴嘴37設置於與燒結原料的堆積面在垂直方向上相距500 mm以上的位置，自該位置向燒結原料的堆積面吹入水蒸氣。The
如此，一邊吹入水蒸氣一邊對燒結原料進行造粒來製造擬似粒子，藉此造粒成溫度較不吹入水蒸氣而造粒的擬似粒子高10℃以上的平均粒徑3.0 mm左右的擬似粒子。擬似粒子藉由搬送輸送機39而搬送至燒結機40。在本實施方式中，擬似粒子的平均粒徑為算術平均粒徑Σ（Vi×di）（其中，Vi是位於第i粒度範圍中的粒子的存在比率，di是第i粒度範圍的代表粒徑）所定義的粒徑。另外，滾筒混合機32為對燒結原料進行造粒的造粒裝置的一例。In this way, the sintering raw material is granulated while blowing water vapor to produce pseudo particles. The temperature is thereby granulated into pseudo particles that are 10°C or more higher than the pseudo particles granulated without blowing water vapor and have an average particle diameter of about 3.0 mm. The pseudo particles are transported to the
燒結機40例如是下方抽吸式的維-勞氏燒結機。燒結機40具有：燒結原料供給裝置42、環形移動式的托盤台車44、點火爐46、以及風箱（wind box）48。自燒結原料供給裝置42將燒結原料裝入至托盤台車44，形成燒結原料的裝入層。裝入層由點火爐46點火。藉由通過風箱48抽吸空氣，一邊在裝入層內使凝結材料18燃燒，一邊使裝入層內的燃燒/熔融帶向裝入層的下方移動。藉此，裝入層被燒結而形成燒結塊。在本實施方式中，亦可包括氣體燃料供給裝置47。自氣體燃料供給裝置47供給的氣體燃料是選自高爐氣、焦爐氣、高爐/焦爐混合氣體、轉爐氣、城鎮氣體燃料氣體、天然氣、甲烷氣體、乙烷氣體、丙烷氣體、葉岩氣體及該些的混合氣體中的任一可燃性氣體。The sintering
將燒結塊藉由破碎機50破碎而成為燒結礦。由破碎機50破碎的燒結礦由冷卻機52冷卻。由冷卻機52冷卻的燒結礦由具有多個篩子的篩分裝置54篩分，被篩分為粒徑超過5 mm的成品燒結礦56及粒徑5 mm以下的返礦58。成品燒結礦56用作高爐原料。另一方面，返礦58藉由搬送輸送機60而搬送至原料供給部20的調配槽28。在本實施方式中，成品燒結礦56的粒徑及返礦58的粒徑是指藉由篩子篩分的粒徑，例如，所謂粒徑超過5 mm，是指使用孔徑5 mm的篩子篩分至篩上的粒徑，所謂粒徑5 mm以下，是指使用孔徑5 mm的篩子篩分至篩下的粒徑。成品燒結礦56及返礦58的粒徑的各值僅為一例，並不限定於該值。The sintered lump is crushed by the
如此，在使用燒結礦製造設備10的燒結礦的製造中，利用滾筒混合機32向燒結原料吹入水蒸氣而對燒結原料進行造粒並且進行加熱。藉此，燒結原料的裝入層的通氣性提高，燒結原料的生產率提高。圖2是表示滾筒混合機輸出側的擬似粒子的溫度與裝入層的通氣性指數JPU的關係的圖表。圖2的橫軸為自滾筒混合機32排出的擬似粒子的溫度（℃）。擬似粒子的溫度是自滾筒混合機32排出的擬似粒子的平均溫度。In this way, in the production of sintered ore using the sintered
投入至滾筒混合機32之前的燒結原料的溫度為35.0℃。燒結原料包含含CaO原料。CaO在與水反應而生成Ca(OH)
2時發熱，因此即使不吹入水蒸氣，燒結原料的溫度亦自35.0℃上升至約42.5℃。圖2的橫軸為42.5℃的點繪是不向燒結原料吹入水蒸氣而對燒結原料進行造粒的造粒例，其他點繪是向燒結原料吹入水蒸氣而造粒並對燒結原料進行加熱的造粒例。
The temperature of the sintering raw material before being put into the
圖2的縱軸為裝入層的通氣性指數JPU。所謂JPU，是使藉由將擬似粒子裝入至托盤而形成的裝入層在冷態下向下抽吸大氣並測定出的通氣性指數。通氣性指數JPU是使用下述（1）式而算出。The vertical axis of Figure 2 is the breathability index JPU of the built-in layer. JPU is a breathability index measured by sucking the air downward into a layer formed by loading pseudo particles into a tray in a cold state. The air permeability index JPU is calculated using the following formula (1).
JPU=V/[S×（ΔP/h） 0.6]･･･（1） 在所述（1）式中，V為風量（m 3/min），S為燒結機的有效面積（m 2），h為裝入層高度（mm），ΔP為壓力損失（mmH 2O）。 JPU = V / [ S , h is the loading layer height (mm), ΔP is the pressure loss (mmH 2 O).
若裝入層的通氣性高，則通氣性指數JPU變大，若通氣性低，則通氣性指數JPU變小。如圖2所示，藉由向燒結原料吹入水蒸氣，使擬似粒子的溫度高於42.5℃，裝入層的通氣性提高。另外，由溫度自42.5℃提高至10℃以上的56.0℃的擬似粒子形成的裝入層的通氣性顯著高於由47.0℃的擬似粒子形成的裝入層的通氣性。根據該結果可知，較佳為向燒結原料吹入水蒸氣而造粒，製成溫度較不吹入水蒸氣而造粒的擬似粒子高10℃以上的擬似粒子，藉此，成為形成高通氣性的裝入層的擬似粒子。If the air permeability of the built-in layer is high, the air permeability index JPU becomes large, and if the air permeability is low, the air permeability index JPU becomes small. As shown in Figure 2, by blowing water vapor into the sintering raw material, the temperature of the pseudo particles is higher than 42.5°C, and the air permeability of the packed layer is improved. In addition, the air permeability of the loading layer formed of the pseudo-particles at 56.0°C, where the temperature was raised from 42.5°C to 10°C or above, was significantly higher than that of the loading layer formed of the pseudo-particles at 47.0°C. From this result, it can be seen that it is preferable to blow water vapor into the sintered raw material for granulation, and to prepare pseudo particles whose temperature is 10°C or more higher than that of pseudo particles granulated without blowing water vapor. This can form a device with high air permeability. Pseudo-particles entering the layer.
圖3是表示滾筒混合機輸出側的擬似粒子的溫度與燒結礦的生產率的關係的圖表。圖3的橫軸為自滾筒混合機32排出的擬似粒子的溫度（℃）。圖3的縱軸為燒結礦的生產率（t/（hr×m
2））。如圖3所示，使用溫度相對於43.5℃高10℃以上的溫度的56.0℃的擬似粒子生產燒結礦的燒結礦的生產率顯著高於使用47.0℃的擬似粒子生產燒結礦的燒結礦的生產率。根據該結果與圖2的結果可知，藉由向燒結原料吹入水蒸氣進行造粒，製成溫度較不吹入水蒸氣而造粒的擬似粒子高10℃以上的擬似粒子，使用該擬似粒子製造燒結礦，可實現燒結礦的生產率的提高。
FIG. 3 is a graph showing the relationship between the temperature of the pseudo particles on the output side of the drum mixer and the productivity of sintered ore. The horizontal axis of FIG. 3 represents the temperature (°C) of the pseudo particles discharged from the
接著，對吹入燒結原料的水蒸氣，可有效率地提高自滾筒混合機32排出的擬似粒子的溫度的滾筒混合機32的結構進行說明。由於滾筒33以橫向為旋轉軸旋轉，因此滾筒33內的燒結原料的堆積位置相對於鉛垂下方向向滾筒33的旋轉方向傾斜。多個噴嘴37設置於與燒結原料的堆積面在垂直方向上相距500 mm以上的位置。如此，藉由將多個噴嘴37設置於與燒結原料的堆積面在垂直方向上相距500 mm以上的位置，可有效率地提高擬似粒子的溫度。滾筒混合機32中的旋轉軸可設為大致水平。另外，為了效率良好地排出擬似粒子，亦可以排出口35相對於投入口34位於鉛垂方向的下方的方式使旋轉軸傾斜。Next, the structure of the
圖4（a）、圖4（b）是對滾筒混合機32的結構進行說明的示意圖。圖4（a）是滾筒混合機32的剖面示意圖。圖4（b）是蒸汽配管36的示意圖。再者，在圖4（b）中，由表示自各噴嘴噴出的水蒸氣的噴出方向的箭頭表示多個噴嘴37。4(a) and 4(b) are schematic diagrams illustrating the structure of the
如圖4（a）、圖4（b）所示，在本實施方式的滾筒混合機32中，蒸汽配管36設置於自滾筒33的投入口34至成為投入口34與排出口35的中間位置之間的前半部分的距投入口34為5000 mm的位置。另外，在蒸汽配管36，以350 mm的間距分別設置有十五個的噴嘴37。該些多個噴嘴37中的自投入口34側起第一個～第七個噴嘴以相對於燒結原料的堆積面垂直地噴出水蒸氣的方式設置。自投入口34側起第八個～第十四個噴嘴以朝向排出口35側的方式相對於針對燒結原料的堆積面的垂線向排出口35側傾斜30°地設置。最靠近排出口35側的噴嘴相對於針對燒結原料的堆積面的垂線向排出口35側傾斜45°地設置。即，多個噴嘴37中的半數以上的噴嘴的蒸汽噴出方向以朝向排出口35側的方式傾斜地設置，剩餘的噴嘴的蒸汽噴出方向以相對於燒結原料的堆積面垂直地噴出蒸汽的方式設置。As shown in FIGS. 4(a) and 4(b) , in the
圖5是表示多個噴嘴的位置的滾筒混合機的剖面圖。為了確認噴嘴的設置位置的效果，製作圖4（a）、圖4（b）所示的滾筒混合機，且為以使噴嘴的位置成為距燒結原料62的堆積面在垂直方向上的距離為100 mm、300 mm、500 mm、1500 mm及2500 mm的方式設置蒸汽配管的滾筒混合機，使用該滾筒混合機實施蒸汽吹入實驗。FIG. 5 is a cross-sectional view of the drum mixer showing the positions of a plurality of nozzles. In order to confirm the effect of the installation position of the nozzle, a drum mixer as shown in FIGS. 4(a) and 4(b) was produced so that the position of the nozzle would be at a distance in the vertical direction from the deposition surface of the sintering
圖6是表示蒸汽吹入實驗的結果的圖表。圖6的橫軸為滾筒混合機內的位置（m），縱軸為燒結原料的溫度（℃）。在圖6中，燒結原料的溫度是橫軸所示的滾筒混合機內的各位置處的燒結原料的平均溫度。本實驗（蒸汽吹入實驗）的條件為，在任一實驗例（1～5）中，均將蒸汽吹入量設為7.5 t/h，將蒸汽溫度設為170℃（蒸汽配管的壓力：0.7 MPa），將原料（燒結原料）投入量設為730 t/h，進行實驗。FIG. 6 is a graph showing the results of the steam injection experiment. The horizontal axis of Figure 6 represents the position (m) within the drum mixer, and the vertical axis represents the temperature (°C) of the sintering raw material. In FIG. 6 , the temperature of the sintering raw material is the average temperature of the sintering raw material at each position in the drum mixer shown on the horizontal axis. The conditions for this experiment (steam injection experiment) are that in any of the experimental examples (1 to 5), the steam injection amount is 7.5 t/h, and the steam temperature is 170°C (steam pipe pressure: 0.7 MPa), the input amount of raw materials (sintered raw materials) was set to 730 t/h, and the experiment was conducted.
如圖6所示，在與燒結原料的堆積面在垂直方向上的距離小於500 mm的實驗例1、實驗例2的滾筒混合機中，投入口附近的溫度雖然變高，但是其後，溫度下降，自該些滾筒混合機排出的擬似粒子的溫度變低。另一方面，在與燒結原料的堆積面在垂直方向上的距離相距500 mm以上的實驗例3、實驗例4、實驗例5的滾筒混合機中，投入口附近的溫度雖然低，但是其後的溫度下降得到抑制，自該些滾筒混合機排出的擬似粒子的溫度較實驗例1、實驗例2高。根據該些結果，確認到藉由在與燒結原料的堆積面在垂直方向上相距500 mm以上的位置設置多個噴嘴，自該噴嘴向燒結原料吹入水蒸氣，相較於在距燒結原料的堆積面在垂直方向上小於500 mm的位置設置多個噴嘴的情況，自滾筒混合機排出的擬似粒子的溫度提高。如此，在本實施方式的滾筒混合機中，可知由於可吹入蒸汽而效率良好地提高擬似粒子的溫度，因此若吹入的蒸汽量相同，則可進一步提高自滾筒混合機排出的擬似粒子的溫度，若自滾筒混合機排出的擬似粒子的溫度相同，則可進一步減少水蒸氣的吹入量。As shown in Figure 6 , in the drum mixers of Experimental Examples 1 and 2 in which the vertical distance to the deposition surface of the sintering raw material was less than 500 mm, the temperature near the input port became high, but thereafter the temperature As the temperature decreases, the temperature of the pseudo-particles discharged from the drum mixers becomes lower. On the other hand, in the drum mixers of Experimental Examples 3, 4, and 5 in which the distance from the deposition surface of the sintering raw material in the vertical direction was 500 mm or more, the temperature near the input port was low, but thereafter The temperature drop was suppressed, and the temperature of the pseudo particles discharged from these drum mixers was higher than that in Experimental Examples 1 and 2. Based on these results, it was confirmed that by arranging a plurality of nozzles at a position more than 500 mm away from the deposition surface of the sintering raw materials in the vertical direction, and blowing water vapor from the nozzles toward the sintering raw materials, it was confirmed that compared with the deposition surface at a distance from the deposition surface of the sintering raw materials, When multiple nozzles are installed at positions less than 500 mm in the vertical direction, the temperature of the pseudo particles discharged from the drum mixer increases. As described above, in the drum mixer of the present embodiment, it is found that the temperature of the pseudo particles can be efficiently raised by blowing steam. Therefore, if the amount of steam blown is the same, the temperature of the pseudo particles discharged from the drum mixer can be further increased. If the temperature of the pseudo particles discharged from the drum mixer is the same, the amount of water vapor injected can be further reduced.
另一方面，自滾筒混合機排出的擬似粒子的水分量亦重要。若自滾筒混合機排出的擬似粒子的水分量小於目標水分量（6.5質量%），則不進行燒結原料的造粒，造粒後的擬似粒子的粒徑變小。如此，若擬似粒子的粒徑變小，則由該粒徑小的擬似粒子形成的裝入層的通氣性劣化，燒結礦的生產率下降。On the other hand, the moisture content of the pseudo-particles discharged from the drum mixer is also important. If the moisture content of the pseudo particles discharged from the drum mixer is less than the target moisture content (6.5% by mass), the sintered raw material is not granulated, and the particle size of the granulated pseudo particles becomes smaller. In this way, when the particle diameter of the pseudo particles becomes smaller, the air permeability of the loading layer formed of the pseudo particles with a small particle diameter deteriorates, and the productivity of sintered ore decreases.
圖7（a）～圖7（c）是表示蒸汽配管的示意圖。在圖7（a）～圖7（c）中，亦由表示自各噴嘴噴出的水蒸氣的噴出方向的箭頭表示多個噴嘴。圖7（a）為以噴出的水蒸氣的噴出方向成為鉛垂下方的方式設置有多個噴嘴的實驗例11的蒸汽配管。圖7（b）為如下實驗例12的蒸汽配管：以從多個噴嘴中的自投入口側起第一個～第七個噴嘴噴出的水蒸氣的噴出方向成為鉛垂下方的方式設置，從自投入口側起第八個～第十四個噴嘴噴出的水蒸氣的噴出方向相對於鉛垂下方向排出口側傾斜30°地設置，自最靠近排出口側的噴嘴噴出的水蒸氣的噴出方向相對於鉛垂下方向排出口側傾斜45°地設置。圖7（c）為如下實施例13的蒸汽配管：從多個噴嘴中的自投入口側起第一個～第七個噴嘴噴出的水蒸氣的噴出方向相對於鉛垂下方向排出口側傾斜30°地設置，從自投入口側起第八個～第十四個噴嘴噴出的水蒸氣的噴出方向相對於鉛垂下方向排出口側傾斜45°地設置，自最靠近排出口側的噴嘴噴出的水蒸氣的噴出方向相對於鉛垂下方向排出口側傾斜60°地設置。使用將該些蒸汽配管設置成自與燒結原料的堆積面在垂直方向上相距1500 mm的位置吹入水蒸氣的滾筒混合機，實施水蒸氣吹入實驗。7(a) to 7(c) are schematic diagrams showing steam piping. In FIGS. 7( a ) to 7 ( c ), the plurality of nozzles are also represented by arrows indicating the ejection directions of water vapor ejected from each nozzle. FIG. 7( a ) shows a steam pipe of Experimental Example 11 in which a plurality of nozzles are provided so that the ejection direction of ejected water vapor becomes vertically downward. Figure 7(b) shows the steam piping of Experimental Example 12, which is installed so that the ejection direction of the water vapor ejected from the first to seventh nozzles from the input port side of the plurality of nozzles is vertically downward. The ejection direction of the water vapor ejected from the eighth to fourteenth nozzles from the input port side is inclined at 30° with respect to the vertical downward discharge port side, and the ejection direction of the water vapor ejected from the nozzle closest to the discharge port side It is installed at an inclination of 45° with respect to the discharge port side in the vertical downward direction. Figure 7(c) is a steam piping of Example 13 in which the ejection direction of the water vapor ejected from the first to seventh nozzles from the input port side among the plurality of nozzles is inclined by 30° with respect to the discharge port side in the vertical downward direction. °, the ejection direction of the water vapor ejected from the eighth to fourteenth nozzles from the input port side is inclined at 45° with respect to the outlet side in the vertical downward direction, and the ejection direction of the water vapor ejected from the nozzle closest to the outlet side is The direction in which the water vapor is ejected is inclined at 60° with respect to the vertical downward discharge port side. The water vapor blowing experiment was carried out using a drum mixer in which the steam piping was arranged so as to blow water vapor from a
圖8是表示蒸汽吹入實驗的結果的圖表。圖8的橫軸為滾筒混合機內的位置（m），縱軸為燒結原料的水分量（質量%），且表示橫軸所示的滾筒混合機內的各位置處的燒結原料的平均水分量。Fig. 8 is a graph showing the results of the steam injection experiment. The horizontal axis of Figure 8 represents the position (m) within the drum mixer, and the vertical axis represents the moisture content (mass %) of the sintered raw material. The horizontal axis represents the average moisture content of the sintered raw material at each position within the drum mixer. quantity.
如圖8所示，由設置有實驗例12、實驗例13的蒸汽配管的滾筒混合機造粒的擬似粒子的水分量較由設置有實驗例11的蒸汽配管的滾筒混合機造粒的擬似粒子的水分量多。根據該些結果可知，較佳為隨著噴嘴的位置接近排出口而噴出的水蒸氣的噴出方向以更朝向排出口側的方式大幅傾斜地設置。另外，可知實驗例13相較於實驗例12而言擬似粒子的水分量多，因此較佳為多個噴嘴中的半數以上的噴嘴的蒸汽噴出方向以朝向排出口的方式傾斜地設置，更佳為對於其全部，噴嘴的蒸汽噴出方向以朝向排出口側的方式傾斜地設置。再者，由於來自各個噴嘴的蒸汽吹入量相同，因此可謂較佳為總水蒸氣吹入量中的一半以上的水蒸氣的噴出方向以朝向排出口側的方式傾斜而將水蒸氣吹入至燒結原料，更佳為全部的水蒸氣的噴出方向以朝向排出口側的方式傾斜而將水蒸氣吹入至燒結原料。As shown in FIG. 8 , the moisture content of the pseudo-particles granulated by the drum mixer equipped with the steam pipe of Experimental Examples 12 and 13 is higher than that of the pseudo-particles granulated by the drum mixer equipped with the steam pipe of Experimental Example 11. There is a lot of moisture. From these results, it is understood that it is preferable that the ejection direction of the water vapor ejected as the position of the nozzle approaches the ejection outlet be set at a large inclination toward the ejection outlet side. In addition, it can be seen that Experimental Example 13 has a larger water content in the pseudo particles than Experimental Example 12, so it is preferable that the steam ejection directions of more than half of the plurality of nozzles are inclined toward the discharge port, and more preferably In all of them, the steam ejection direction of the nozzle is inclined toward the discharge port side. Furthermore, since the amount of steam injected from each nozzle is the same, it can be said that it is preferable that the ejection direction of more than half of the total water vapor injection amount is tilted toward the discharge port side and the water vapor is blown into For the sintering raw material, it is more preferable that the ejection direction of all the water vapor is inclined toward the discharge port side so that the water vapor is blown into the sintering raw material.
以上，如所說明般作為本實施方式的造粒裝置的滾筒混合機32可向燒結原料吹入蒸汽而有效率地進行加熱。因此，若蒸汽使用量相同，則可將擬似粒子加熱至更高的溫度，若排出口側的溫度相同，則可以更少的蒸汽使用量對擬似粒子進行加熱。如此，藉由使用本實施方式的造粒裝置，可在將燒結原料加熱至規定溫度的同時削減燒結礦製造時所使用的蒸汽量，因此可實現本燒結礦的生產率的提高及燒結礦的製造成本上升的抑制。As described above, the
10:燒結礦製造設備 11:場地 12:含鐵原料 14:搬送輸送機 16:含CaO原料 17:含MgO原料 18:凝結材料 20:原料供給部 22:調配槽 24:調配槽 25:調配槽 26:調配槽 28:調配槽 30:搬送輸送機 32:滾筒混合機 33:滾筒 34:投入口 35:排出口 36:蒸汽配管 37:噴嘴 38:水蒸氣 39:搬送輸送機 40:燒結機 42:燒結原料供給裝置 44:托盤台車 46:點火爐 47:氣體燃料供給裝置 48:風箱 50:破碎機 52:冷卻機 54:篩分裝置 56:成品燒結礦 58:返礦 60:搬送輸送機 62:燒結原料 10: Sinter manufacturing equipment 11:Venue 12: Iron-containing raw materials 14:Transport conveyor 16: CaO-containing raw materials 17: Raw materials containing MgO 18:Condensation material 20:Raw material supply department 22: Mixing tank 24: Mixing tank 25: Mixing tank 26: Mixing tank 28: Mixing tank 30:Transport conveyor 32:Roller mixer 33:Roller 34:Input port 35:Discharge outlet 36:Steam piping 37:Nozzle 38:Water vapor 39:Transport conveyor 40:Sintering machine 42: Sintering raw material supply device 44:Pallet trolley 46: Ignition stove 47: Gas fuel supply device 48: Bellows 50: Crusher 52:Cooler 54:Screening device 56:Finished sinter 58:Return to Mine 60:Transport conveyor 62: Sintering raw materials
圖1是表示具有作為本實施方式的造粒裝置的滾筒混合機32的燒結礦製造設備10的一例的示意圖。
圖2是表示滾筒混合機輸出側的燒結原料的溫度與裝入層的通氣性指數JPU的關係的圖表。
圖3是表示滾筒混合機輸出側的燒結原料的溫度與裝入層的通氣性指數JPU的關係的圖表。
圖4（a）、圖4（b）是對滾筒混合機的結構進行說明的示意圖。
圖5是表示多個噴嘴的位置的滾筒混合機的剖面圖。
圖6是表示蒸汽吹入實驗的結果的圖表。
圖7（a）～圖7（c）是表示蒸汽配管的示意圖。
圖8是表示蒸汽吹入實驗的結果的圖表。
FIG. 1 is a schematic diagram showing an example of the
10:燒結礦製造設備 10: Sinter manufacturing equipment
11:場地 11:Venue
12:含鐵原料 12: Iron-containing raw materials
14:搬送輸送機 14:Transport conveyor
16:含CaO原料 16: CaO-containing raw materials
17:含MgO原料 17: Raw materials containing MgO
18:凝結材料 18:Condensation material
20:原料供給部 20:Raw material supply department
22:調配槽 22: Mixing tank
24:調配槽 24: Mixing tank
25:調配槽 25: Mixing tank
26:調配槽 26: Mixing tank
28:調配槽 28: Mixing tank
30:搬送輸送機 30:Transport conveyor
32:滾筒混合機 32:Roller mixer
33:滾筒 33:Roller
34:投入口 34:Input port
35:排出口 35:Discharge outlet
36:蒸汽配管 36:Steam piping
37:噴嘴 37:Nozzle
38:水蒸氣 38:Water vapor
39:搬送輸送機 39:Transport conveyor
40:燒結機 40:Sintering machine
42:燒結原料供給裝置 42: Sintering raw material supply device
44:托盤台車 44:Pallet trolley
46:點火爐 46: Ignition stove
47:氣體燃料供給裝置 47: Gas fuel supply device
48:風箱 48: Bellows
50:破碎機 50: Crusher
52:冷卻機 52:Cooler
54:篩分裝置 54:Screening device
56:成品燒結礦 56:Finished sinter
58:返礦 58:Return ore
60:搬送輸送機 60:Transport conveyor
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-073925 | 2022-04-28 | ||
| JP2022073925 | 2022-04-28 |
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|---|---|
| TW202346607A true TW202346607A (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| TW112114435A TW202346607A (en) | 2022-04-28 | 2023-04-18 | Granulation device, method for producing granulation sintering raw material, and method for producing sintered ore |
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| Country | Link |
|---|---|
| JP (1) | JPWO2023210411A1 (en) |
| TW (1) | TW202346607A (en) |
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| JP2016172903A (en) * | 2015-03-17 | 2016-09-29 | 株式会社神戸製鋼所 | Method for producing raw material for sintered ore production |
| RU2765204C1 (en) * | 2018-02-28 | 2022-01-26 | ДжФЕ СТИЛ КОРПОРЕЙШН | Method for manufacturing granular material of initial raw materials for sintering |
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- 2023-04-14 WO PCT/JP2023/015186 patent/WO2023210411A1/en active Application Filing
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| WO2023210411A1 (en) | 2023-11-02 |
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