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WO2018170767A1 - 球团矿、其制备方法和制备装置 - Google Patents

球团矿、其制备方法和制备装置 Download PDF

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Publication number
WO2018170767A1
WO2018170767A1 PCT/CN2017/077613 CN2017077613W WO2018170767A1 WO 2018170767 A1 WO2018170767 A1 WO 2018170767A1 CN 2017077613 W CN2017077613 W CN 2017077613W WO 2018170767 A1 WO2018170767 A1 WO 2018170767A1
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WIPO (PCT)
Prior art keywords
powder
pellet
preparing
ore
screen
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Ceased
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PCT/CN2017/077613
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English (en)
French (fr)
Inventor
张卫东
青格勒
田筠清
张彦
蔡皓宇
赵志星
裴元东
马泽军
赵勇
王晓鹏
安钢
黄文斌
霍吉祥
刘文旺
李明
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Shougang Corp
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Shougang Corp
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Publication date
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Priority to AU2017405434A priority Critical patent/AU2017405434B2/en
Priority to BR112019002449-2A priority patent/BR112019002449A2/pt
Priority to PCT/CN2017/077613 priority patent/WO2018170767A1/zh
Priority to KR1020197002292A priority patent/KR102285165B1/ko
Priority to CN201780051133.3A priority patent/CN110402293B/zh
Priority to JP2018568206A priority patent/JP6767519B2/ja
Publication of WO2018170767A1 publication Critical patent/WO2018170767A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C22B1/2406—Binding; Briquetting ; Granulating pelletizing
    • 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
    • C22B1/02—Roasting processes
    • 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
    • C22B1/242—Binding; Briquetting ; Granulating with binders

Definitions

  • the invention relates to the technical field of sintered ore powder, in particular to a pellet, a preparation method thereof and a preparation device.
  • Pellet ore and sinter are the main charge for blast furnace ironmaking.
  • the sinter ore is prepared by mixing various powdery iron-containing raw materials into a certain proportion of fuel and flux as required, and uniformly granulating and sintering on the sintering machine.
  • the iron ore fine powder for sintering is relatively coarse in particle size, and the particle size requirement is relatively low, and a plurality of mineral powders can be used.
  • Pellet ore production requires relatively high raw materials, requiring pellets with a certain particle size and particle size composition, suitable moisture and uniform chemical composition.
  • the general pellet powder is finely ground and selected ore powder, which has high grade, fine particle size and low content of harmful components. Therefore, the pellets have relatively few types of raw materials, relatively low yields, and relatively high prices.
  • the cold quality of pellets and the environmental performance of the production process are better than sintering.
  • the sinter has low strength, high returning rate, large amount of exhaust gas in the production process, high dust concentration, large amount of dust, and generation of pollutants such as dioxins.
  • the energy consumption of the sintering process is twice that of the pellet process. the above.
  • the amount of exhaust gas in the pellet production process is relatively low, and there are very few pollutants such as dioxins in the production process, low energy consumption in the process, and low dust content.
  • the development of pellet technology, the production and use of pellets is a trend. To develop pellets, first of all, there must be sufficient and cost-effective mineral resources. However, the current global pellets are still limited and the price is relatively high, which has made it difficult for steel companies worldwide to develop pellets. Process.
  • the present invention provides a pellet, a preparation method thereof and a preparation apparatus which are capable of using a sintered ore powder to prepare a pellet, thereby being more suitable for practical use.
  • the mass percentage of each component of the pellets provided by the present invention includes: TFe: 62.1% to 65.82%, FeO: 0.2% to 0.58%, SiO 2 : 1.90% to 5.97%, and CaO: 0.17% to 3.23. %, MgO: 0.18% to 0.52%, Al 2 O 3 : 0.58% to 2.66%, mass ratio of CaO to SiO 2 : 0.035 to 1.31;
  • the technical solution of the method for preparing pellets provided by the present invention is as follows:
  • the preparation method of the pellets provided by the invention comprises the following steps:
  • Pellet powder and/or boron-containing pellet powder the fine grinding sintered powder is ore-matched to obtain concentrate powder;
  • the intermediate mixture is passed through a pelletizing and calcining process in sequence to produce the pellet.
  • the preparation device of the pellet ore provided by the invention comprises a grinding device, a container, a pelletizing device, a roasting system,
  • the grinding device is used for fine grinding the sintered ore powder to obtain a fine grinding sintered powder having set parameters
  • the container is used for accommodating pellets and/or boron-containing ore powder, finely ground powder obtained by ore blending of the finely ground sintered powder; and an intermediate mixture obtained by adding a binder to the concentrate powder;
  • the pelletizing device is configured to pellet the intermediate product to obtain a spherical intermediate product
  • the calcination system is used in a calcination process of the spherical intermediate product, and the pellet is obtained through the calcination process.
  • the pellets provided by the invention are prepared by sintering ore powder, that is, the pellets with good quality and relatively low environmental cost can be prepared by using the ore fine powder with poor quality and relatively high environmental cost,
  • the green development of the metallurgical industry has opened up a simple and beneficial approach.
  • the pellet ore provided by the present invention can be obtained by the preparation method and preparation device of the pellet ore provided by the present invention, that is, the sintered ore powder with poor quality and relatively high environmental cost can be prepared to obtain better quality and environment.
  • the relatively low cost pellets have created a simple and beneficial way for the green development of the metallurgical industry.
  • FIG. 1 is a flow chart showing the steps of a method for preparing a pellet ore according to an embodiment of the present invention
  • FIG. 2 is a flow chart of material changes in a process for preparing a pellet ore according to an embodiment of the present invention
  • FIG. 3 is a flow chart showing the steps of a roasting process involved in a method for preparing a pellet ore according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram showing a connection relationship between devices in a pelletizing apparatus according to an embodiment of the present invention.
  • Figure 5 is a physical photograph of the sinter
  • FIG. 6 is a photo photograph of a pellet of a pellet obtained by the preparation method and the preparation apparatus provided by the embodiment of the present invention.
  • the present invention provides a pellet, a preparation method thereof and a preparation device, which are capable of applying a sinter powder to prepare a pellet, thereby being more suitable for practical use.
  • a and B in this context is merely an association that describes an associated object, indicating that there may be three relationships, for example, A and/or B.
  • a and B can be included at the same time, and can be separate. If A exists, B may exist alone, and any of the above three cases may be provided.
  • Fine-grinding the Baca mineral powder to obtain fine-ground Baca mineral powder wherein the fine-grained Baca mineral powder has a mass percentage of particles of ⁇ 74 ⁇ m ⁇ 80%, and the quality of particles with particle size ⁇ 44 ⁇ m The percentage is >60%.
  • Weigh 99.0kg of concentrate powder of fine grinding Baka mineral powder add 0.6kg bentonite as binder, 3.3kg slaked lime as calcium-containing flux, water as liquid medium, and mix to obtain intermediate product. In the intermediate product, the moisture content was 7.0% by weight. Place the intermediate product on the disc The ball is formed in the pelletizer, and the peening time lasts for 10 minutes.
  • the green ball with the particle size of 9 mm to 16 mm is sieved, and the roasting process is completed in the baking cup to obtain the pellet.
  • the roasting process comprises: the raw ball is first subjected to blast drying, the temperature is 320 ° C, the duration is 3 minutes, and then the air is dried, the temperature is 450 ° C, the duration is 5 minutes, and then preheated, the temperature is 1000 ° C, and the duration is After 6 minutes, the calcination was carried out at a temperature of 1290 ° C for a duration of 10 minutes, followed by soaking at a temperature of 1150 ° C for a duration of 3 minutes; the pellet after soaking was cooled to 150 ° C with air.
  • the mass percentages of the components in the pellet are: TFe: 63.46%, FeO: 0.56%, SiO 2 : 2.32%, CaO: 2.76%, MgO: 0.27%, Al 2 O 3 : 2.01%, CaO
  • the mass ratio to SiO 2 was 1.19.
  • the compressive strength of the pellet was 2879 N/P, the drum index was 93.2%, the reduction expansion ratio was 17.2%, and the reduction degree was 73.5%.
  • Example 1-18 provides the mass percentage of each component in the pellets and other indicators
  • the requirements for the pellet quality of the qualified quality are: compressive strength > 2400 N, reduction expansion ratio ⁇ 20%; considering the above-mentioned Examples 1 to 18 of the present invention, it is understood that the above-described Embodiments 1 to 18 of the present invention are satisfied.
  • the above indicators require that, therefore, the quality of the pellets obtained by using Examples 1 to 18 of the present invention is acceptable.
  • hematite (chemical formula: Fe 2 O 3 ) sintered powder can be used alone or with different proportions of magnetite (chemical formula: Fe 3 O 4 ) pellet powder, if it contains limonite (chemical formula is Fe 2 O) 3 ⁇ H 2 O)
  • Sintered powder is formulated with 50 to 90% of magnetite pellet powder or hematite (chemical formula of Fe 2 O 3 ) sintered powder or 5 to 10% of boron-containing pellet powder.
  • Figure 5 shows a sintered ore
  • Figure 6 shows the pellets, from As can be seen from Figure 6, the appearance of the pellets is a regular circular structure.
  • a pelletizing apparatus provided in Embodiment 19 of the present invention includes a grinding apparatus, a container, a pelletizing apparatus, and a baking system.
  • the grinding device is used for finely grinding the sintered ore powder to obtain a fine grinding sintered powder having set parameters; the container is used for accommodating the concentrate of the pellet ore and/or the boron-containing ore powder and the finely ground sintered powder through the ore blending.
  • the obtained pellets are acidic pellets.
  • the pellets having a mass ratio of CaO to SiO 2 of ⁇ 0.6 are acidic balls.
  • the intermediate mixture also includes a calcium-containing flux.
  • the calcium-containing flux is usually slaked lime (Ca(OH) 2 ) or limestone (CaCO 3 ), and the obtained pellet is obtained as a flux pellet or a self-fluxing pellet.
  • a pellet having a mass ratio of CaO to SiO 2 of >0.6 is a flux pellet, wherein a pellet having a mass ratio of CaO to SiO 2 of 0.8 to 1.2 is a self-fluxing pellet.
  • the apparatus for preparing pellets provided in Embodiment 13 of the present invention further includes a first screen and a second screen.
  • the screen diameter of the first screen was 74 ⁇ m
  • the diameter of the screen of the second screen was 44 ⁇ m.
  • the particles trapped on the first screen are judged to have a particle size of >74 ⁇ m
  • the particles capable of passing through the first screen are judged to have a particle diameter of ⁇ 74 ⁇ m; further, they are trapped in the second sieve.
  • the particles above the web were judged to have a particle size of > 44 ⁇ m
  • the particles capable of passing through the second screen were judged to have a particle diameter of ⁇ 44 ⁇ m.
  • a shaker apparatus can also be provided, which is used for the first screen and/or the second screen.
  • the web is shaken in a horizontal direction such that the various angles of the particles above the first screen and/or the second screen are likely to contact the screen openings, avoiding the particles and the first screen and/or the second screen Mistakes caused by misalignment of the contact angle of the net.
  • a first stirring mechanism and/or a second stirring mechanism may be provided, the first stirring mechanism For agitating the upper surface of the first screen, the second stirring mechanism is for stirring the upper surface of the second screen so as to directly cover the surface of the first screen and/or the surface of the second screen The particles are in an active state, further enhancing the screening efficiency of the first screen and/or the second screen.
  • the second screen is arranged below the first screen.
  • the mesh aperture of the first screen > the aperture of the mesh of the second screen, the particle size leaked from the first screen ⁇ the aperture of the first screen
  • the particles can fall directly on the surface of the second screen, so that it is no longer necessary to transfer to the surface of the second screen by means of the transfer container, so that the technical solution is simpler and the operation is more convenient.
  • the apparatus for preparing pellets according to the thirteenth embodiment of the present invention further includes a third screen, wherein the diameter of the third screen is in the range of 9 mm to 16 mm, and the third screen is used for screening the range of the particle diameter. It is a raw ball of 9mm to 16mm.
  • the apparatus for preparing pellets provided in Embodiment 19 of the present invention further includes a clock for measuring time intervals of the pelletizing and/or firing process.
  • a clock for measuring time intervals of the pelletizing and/or firing process.
  • the time control of the pelletizing and/or firing process can be made more precise.
  • an alarm can also be set. When the peening time reaches a preset time, the alarm automatically issues an alarm, and the alarm can be selected from a buzzer, a signal light, a short message, a qq message. Any one or several of voice messages and WeChat messages.
  • a conveying mechanism can be provided to automatically feed the raw ball into the roasting system through the conveying mechanism, thereby making the operation more convenient and quick.
  • the apparatus for preparing pellets provided in Embodiment 19 of the present invention further includes a temperature control device for adjusting the temperature of the baking system.
  • a temperature control device for adjusting the temperature of the baking system. In this case, the temperature of each stage of the baking process can be more accurately controlled, and the test result is more accurate.

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Abstract

一种球团矿、其制备方法和制备装置。球团矿中各组分的质量百分含量为：TFe62.1%-65.82%，FeO 0.2%-0.58%，SiO21.9%-6.13%，CaO 0.19%-3.23%，MgO 0.18%-0.52%，Al2O30.58%-2.66%。制备方法包括：对烧结矿粉进行细磨得到细磨烧结粉；将球团粉和/或含硼球团粉、细磨烧结粉配矿得到精矿粉；向精矿粉中加入粘结剂，得到中间混合物；中间混合物依次经过造球和焙烧后，制得球团矿。制备装置包括研磨装置、容器、造球装置、焙烧系统。利用质量较差、环境代价较高的烧结矿粉制备得到质量较好、环境代价较低的球团矿，为冶金行业的绿色发展开创了简便而有利的途径。

Description

球团矿、其制备方法和制备装置 技术领域
本发明涉及烧结矿粉技术领域，特别是涉及一种球团矿、其制备方法和制备装置。
背景技术
球团矿和烧结矿是高炉炼铁的主要炉料。烧结矿是将各种粉状含铁原料，按要求配入一定比例的燃料和熔剂，均匀混合制粒后烧结机上高点火烧结而成。烧结用铁矿粉粒度比较粗，对粒度要求相对低，可以使用多种矿粉。球团矿生产则对原料要求比较高，要求球团原料具有一定的粒度和粒度组成、适宜的水分和均匀的化学成分等。与烧结粉相比，一般球团粉是细磨精选矿粉，其品位高，粒度细，有害成分含量低。所以球团原料种类相对少，产量相对低，价格相对高。
与烧结矿比较，球团矿的冷态质量，生产工艺过程的环保性能都好于烧结。烧结矿强度低，返矿率高，且生产过程的废气量大，含尘浓度高，粉尘量大，产生二噁英等污染物，另外，烧结工艺的工序能耗是球团工艺的2倍以上。球团矿生产工艺的废气量则相对低，生产过程的二噁英等污染物非常少，工序能耗低，粉尘量低。随着全球环保要求的日益严峻，发展球团工艺，生产和使用球团矿是趋势。发展球团矿，则首先要有充足的性价比合适的矿粉资源，而目前全球范围内球团矿粉仍有限，且价格相对高，这就导致了全球范围内的钢铁企业都难以发展球团工艺。
发明内容
有鉴于此，本发明提供了一种球团矿、其制备方法和制备装置，其能够应用烧结矿粉制备球团矿，从而更加适于实用。
为了达到上述第一个目的，本发明提供的球团矿的技术方案如下：
本发明提供的一种球团矿各组分的质量百分含量包括：TFe：62.1％～65.82％，FeO：0.2％～0.58％，SiO2：1.90％～5.97％，CaO：0.17％～3.23％，MgO：0.18％～0.52％，Al2O3：0.58％～2.66％，CaO与SiO2的质量比：0.035～1.31；
其中，
当SiO2的质量百分含量＜3.0％时，CaO与SiO2的质量比≥1.0。为了达到上述第二个目的，本发明提供的球团矿的制备方法的技术方案如下：
本发明提供的球团矿的制备方法包括以下步骤：
对烧结矿粉进行细磨，得到具备设定参数的细磨烧结粉；
将球团粉和/或含硼球团粉、所述细磨烧结粉配矿，得到精矿粉；
向所述精矿粉中加入粘结剂，得到中间混合物；
所述中间混合物依次经过造球和焙烧过程后，制得所述球团矿。
为了达到上述第三个目的，本发明提供的球团矿的制备装置的技术方案如下：
本发明提供的球团矿的制备装置包括研磨装置、容器、造球装置、焙烧系统，
所述研磨装置用于对烧结矿粉进行细磨，得到具有设定参数的细磨烧结粉；
所述容器用于容置球团矿和/或含硼矿粉、所述细磨烧结粉经过配矿得到的精矿粉；向所述精矿粉中加入粘结剂后得到的中间混合物；
所述造球装置用于对所述中间产物进行造球，得到球状的中间产物；
所述焙烧系统用于所述球状中间产物的焙烧过程，经过所述焙烧过程，得到所述球团矿。
本发明提供的球团矿是通过烧结矿粉制备得到的，即能够利用质量较差、环境代价相对较高的烧结用矿粉制备得到质量较好、环境代价相对较低的球团矿，为冶金行业的绿色发展开创了简便而有利的途径。
通过本发明提供的球团矿的制备方法和制备装置，能够制得本发明提供的球团矿，即能够利用质量较差、环境代价相对较高的烧结用矿粉制备得到质量较好、环境代价相对较低的球团矿，为冶金行业的绿色发展开创了简洁而有利的途径。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1为本发明实施例提供的球团矿的制备方法的步骤流程图；
图2为本发明实施例提供的球团矿的制备方法过程中的物质变化流程图；
图3为本发明实施例提供的球团矿的制备方法中涉及的焙烧过程的步骤流程图；
图4为本发明实施例提供的球团矿的制备装置中各设备之间的联结关系示意图；
图5为烧结矿的实物照片图；
图6为经过本发明实施例提供的制备方法和制备装置制备得到的球团矿的实物照片图。
具体实施方式
本发明为解决现有技术存在的问题，提供一种球团矿、其制备方法和制备装置，其能够应用烧结矿粉制备球团矿，从而更加适于实用。
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例，对依据本发明提出的球团矿、其制备方法和制备装置，其具体实施方式、结构、特征及其功效，详细说明如后。在下述说明中，不同的“一实施例”或“实施例”指的不一定是同一实施例。此外，一或多个实施例中的特定特征、结构、或特点可由任何合适形式组合。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，具体的理解为：可以同时包含有A与B，可以单独存在A，也可以单独存在B，能够具备上述三种任一种情况。
实施例1
对巴卡矿粉进行细磨，得到细磨巴卡矿粉，其中，细磨巴卡矿粉中，粒径≤74μm的颗粒的质量百分含量≥80％，粒径≤44μm的颗粒的质量百分含量＞60％。称取细磨巴卡矿粉的精矿粉99.0kg，向其中加入0.6kg膨润土作为粘结剂，3.3kg消石灰作为含钙熔剂，水作为液态介质，混匀后得到中间产物，其中，在该中间产物中，水分质量百分含量为7.0％。将该中间产物置于圆盘 造球机内进行造球，造球时间持续10min，筛取其中粒径处于9mm～16mm的生球，于焙烧杯内完成焙烧过程，得到球团矿。其中，焙烧过程包括：生球先进行鼓风干燥，温度是320℃，持续时间为3分钟，接着抽风干燥，温度450℃，持续时间为5分钟，接着预热，温度1000℃，持续时间为6分钟，接着焙烧，温度1290℃，持续时间为10分钟，接着均热，温度1150℃，持续时间为3分钟；均热后的球团用空气冷却到150℃。
该球团矿中各组分质量百分含量分别为：TFe：63.46％，FeO：0.56％，SiO2：2.32％，CaO：2.76％，MgO：0.27％，Al2O3：2.01％，CaO与SiO2的质量比为1.19。
该球团矿的抗压强度为2879N/P，转鼓指数为93.2％，还原膨胀率为17.2％，还原度为73.5％。
表1实施例1-18提供的球团矿中各组分质量百分含量及其它指标
Figure PCTCN2017077613-appb-000001
Figure PCTCN2017077613-appb-000002
其中，合格质量的球团矿指标要求是：抗压强度>2400N，还原膨胀率<20％；综合考虑本发明的上述实施例1～18，可知，本发明的上述实施例1～18均满足上述指标要求，因此，采用本发明实施例1～18制得的球团矿质量合格。
表2实施例1～18提供的球团矿的制备方法的操作参数
Figure PCTCN2017077613-appb-000003
Figure PCTCN2017077613-appb-000004
续表2
Figure PCTCN2017077613-appb-000005
Figure PCTCN2017077613-appb-000006
其中，赤铁矿(化学式为Fe2O3)烧结粉可单独使用或配不同比例磁铁矿(化学式为Fe3O4)球团粉使用，若含有褐铁矿的(化学式为Fe2O3·H2O)烧结粉则配50～90％磁铁矿球团粉或赤铁矿(化学式为Fe2O3)烧结粉或5～10％含硼球团粉。
参见附图5和附图6，其中，附图5展示的是烧结矿，从附图5可以看出，烧结矿的外观呈不规则多孔状结构；附图6展示的是球团矿，从附图6可以看出，球团矿的外观呈规则圆形结构。
实施例19
参见附图4，本发明实施例19提供的球团矿的制备装置包括研磨装置、容器、造球装置、焙烧系统。研磨装置用于对烧结矿粉进行细磨，得到具有设定参数的细磨烧结粉；容器用于容置球团矿和/或含硼矿粉、细磨烧结粉经过配矿得到的精矿粉；向精矿粉中加入粘结剂后得到的中间混合物；造球装置用于对中间产物进行造球，得到球状的中间产物；焙烧系统用于球状中间产物的焙烧过程，经过焙烧过程，得到球团矿。在这种情况下，由于中间混合物中无添加含钙熔剂，因此，得到的球团矿为酸性球团矿，一般情况下，规定CaO 与SiO2的质量比≤0.6的球团矿为酸性球团矿。
其中，中间混合物还包括含钙熔剂。在这种情况下，含钙熔剂通常选用消石灰(Ca(OH)2)或者石灰石(CaCO3)，得到的成品球团矿为熔剂性球团矿或自熔性球团矿。一般情况下，规定CaO与SiO2的质量比＞0.6的球团矿为熔剂性球团矿；其中，CaO与SiO2的质量比处于0.8～1.2的球团矿为自熔性球团矿。
其中，本发明实施例13提供的球团矿的制备装置还包括第一筛网、第二筛网。第一筛网的筛孔直径＝74μm，第二筛网的筛孔直径＝44μm。在这种情况下，被截留在第一筛网之上的颗粒被判断为粒径＞74μm，而能够通过第一筛网的颗粒被判断为粒径≤74μm；进一步，被截留在第二筛网之上的颗粒被判断为粒径＞44μm，而能够通过第二筛网的颗粒被判断为粒径≤44μm。此时，为了保证粒径小于孔径的颗粒能够顺利通过第一筛网和/或第二筛网，还可以设置摇床设备，该摇床设备用于使第一筛网和/或第二筛网在水平方向上进行摇晃，使得处于第一筛网和/或第二筛网之上的颗粒的各个角度都有可能接触到筛孔，避免由于颗粒与第一筛网和/或第二筛网的接触角度错位而导致的误截留。此外，为了避免由于筛网上表面因分布较多的与筛孔孔径相近的颗粒，而导致筛孔被堵塞的情况，还可以设置第一搅拌机构和/或第二搅拌机构，该第一搅拌机构用于对第一筛网的上表面进行搅拌，该第二搅拌机构用于对第二筛网的上表面进行搅拌，从而使得直接覆盖在第一筛网上表面和/或第二筛网上表面上的颗粒处于活动状态，进一步增强第一筛网和/或第二筛网的筛分效率。
其中，第二筛网布置于第一筛网的下方。在这种情况下，由于第一筛网的筛孔孔径＞第二筛网的筛孔的孔径，从第一筛网漏下的粒径≤第一筛网孔径的 颗粒能够直接落在第二筛网上表面，从而无需再借助中转容器转移至第二筛网上表面，从而，技术方案更加简单，操作也更加方便。
其中，本发明实施例13提供的球团矿的制备装置还包括第三筛网，第三筛网的孔径的取值范围为9mm～16mm，第三筛网用于筛取粒径取值范围为9mm～16mm的生球。
其中，本发明实施例19提供的球团矿的制备装置还包括时钟，时钟用于度量造球和/或焙烧过程的各时间区间。在这种情况下，能够使得造球和/或焙烧过程的时间控制更加精确。此外，为了使得造球时间更容易被控制，还可以设置一报警器，当造球时间达到预设时间时，报警器自动发出警报，警报可以选自蜂鸣器、信号灯、短消息、qq消息、语音消息、微信消息中的任意一种或者几种。
为了能够使得经过第三筛网筛分的生球能够被自动送入焙烧系统，还可以设置一传送机构，使生球通过该传送机构被自动送入焙烧系统，从而，操作更加方便、快捷。
其中，本发明实施例19提供的球团矿的制备装置还包括温度控制装置，温度控制装置用于调节焙烧系统的温度。在这种情况下，能够使得焙烧过程各阶段的温度能够被更加准确地控制，从而，试验结果更加准确。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (20)

  1. 一种球团矿，其特征在于，各组分的质量百分含量包括：TFe：62.1％～65.82％，FeO：0.2％～0.58％，SiO2：1.90％～5.97％，CaO：0.17％～3.23％，MgO：0.18％～0.52％，Al2O3：0.58％～2.66％，CaO与SiO2的质量比：0.035～1.251；
    其中，
    当SiO2的质量百分含量＜3.0％时，CaO与SiO2的质量比≥1.0。
  2. 权利要求1所述的球团矿的制备方法，其特征在于，包括以下步骤：
    对烧结矿粉进行细磨，得到具备设定参数的细磨烧结粉；
    将球团粉和/或含硼球团粉、所述细磨烧结粉配矿，得到精矿粉；
    向所述精矿粉中加入粘结剂，得到中间混合物；
    所述中间混合物依次经过造球和焙烧过程后，制得所述球团矿。
  3. 根据权利要求2所述的球团矿的制备方法，其特征在于，所述球团矿为酸性球团矿。
  4. 根据权利要求2所述的球团矿的制备方法，其特征在于，向所述精矿粉中加入粘结剂，得到中间产物时，还包括向所述精矿粉中加入含钙熔剂的步骤。
  5. 根据权利要求4所述的球团矿的制备方法，其特征在于，所述球团矿为熔剂性球团矿和自熔性球团矿。
  6. 根据权利要求2或4所述的球团矿的制备方法，其特征在于，所述烧结矿粉选自巴卡粉、PB粉、麦克粉、纽曼粉、杨地粉、FMG粉、巴西烧结粉、南非粉、印度粉中的任意一种或者几种的混合物。
  7. 根据权利要求2或4所述的球团矿的制备方法，其特征在于，在所述细磨烧结粉中，
    粒径≤74μm的颗粒的质量百分含量＞80％；
    粒径≤44μm的颗粒的质量百分含量＞60％。
  8. 根据权利要求4所述的球团矿的制备方法，其特征在于，向所述精矿粉中加入粘结剂和含钙熔剂，得到中间混合物时，
    所述精矿粉、粘结剂、含钙熔剂之间的质量比的取值范围为(99.5～92.5)∶(0～1.5)∶(0～6)。
  9. 根据权利要求8所述的球团矿的制备方法，其特征在于，还包括将所述精矿粉、粘结剂、含钙熔剂混匀的步骤。
  10. 根据权利要求9所述的球团矿的制备方法，其特征在于，将所述精矿粉、粘结剂、含该熔剂混匀的过程借助液态介质实现；
    其中，所述液态介质为水。
  11. 根据权利要求2所述的球团矿的制备方法，其特征在于，所述造球持续时间的取值范围为8min～11min。
  12. 根据权利要求2所述的球团矿的制备方法，在所述造球和焙烧过程之间，还包括选取粒径取值范围为9mm～16mm的生球的步骤。
  13. 根据权利要求2所述的球团矿的制备方法，其特征在于，所述焙烧过程的工艺条件依次包括：
    鼓风干燥，其中，温度的取值范围为250℃～350℃，持续时间的取值范围为2min～3min；
    抽风干燥，其中，温度的取值范围为400℃～550℃，持续时间的取值范 围为4min～5min；
    预热，其中，温度的取值范围为800℃～1000℃，持续时间的取值范围为6min～10min；
    焙烧，其中，温度的取值范围为1260℃～1300℃，持续时间的取值范围为7min～12min；
    均热，其中，温度的取值范围为1100℃～1150℃，持续时间的取值范围为2min～3min；
    冷却，其中，经过所述冷却后，温度的取值范围降低至≤150℃。
  14. 根据权利要求1所述的球团矿的制备装置，其特征在于，包括研磨装置、容器、造球装置、焙烧系统，
    所述研磨装置用于对烧结矿粉进行细磨，得到具有设定参数的细磨烧结粉；
    所述容器用于容置球团矿和/或含硼矿粉、所述细磨烧结粉经过配矿得到的精矿粉；向所述精矿粉中加入粘结剂后得到的中间混合物；
    所述造球装置用于对所述中间产物进行造球，得到球状的中间产物；
    所述焙烧系统用于所述球状中间产物的焙烧过程，经过所述焙烧过程，得到所述球团矿。
  15. 根据权利要求14所述的球团矿的制备装置，其特征在于，所述中间混合物还包括含钙熔剂。
  16. 根据权利要求14所述的球团矿的制备装置，其特征在于，还包括第一筛网、第二筛网，
    所述第一筛网的筛孔直径＝74μm，
    所述第二筛网的筛孔直径＝44μm。
  17. 根据权利要求16所述的球团矿的制备装置，其特征在于，所述第二筛网布置于所述第一筛网的下方。
  18. 根据权利要求14所述的球团矿的制备装置，其特征在于，还包括第三筛网，所述第三筛网的孔径的取值范围为9mm～16mm，所述第三筛网用于筛取粒径取值范围为9mm～16mm的生球。
  19. 根据权利要求14所述的球团矿的制备装置，其特征在于，还包括时钟，所述时钟用于度量造球和/或焙烧过程的各时间区间。
  20. 根据权利要求14所述的球团矿的制备装置，其特征在于，还包括温度控制装置，所述温度控制装置用于调节焙烧系统的温度。
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CN115491488A (zh) * 2022-09-21 2022-12-20 宝武集团鄂城钢铁有限公司 一种低巴西混合粉使用量的烧结用含铁料、烧结组合物、烧结矿及其制备方法

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