CN104388669A - Method for improving drum strength of chromium-containing vanadium-titanium sinter - Google Patents
Method for improving drum strength of chromium-containing vanadium-titanium sinter Download PDFInfo
- Publication number
- CN104388669A CN104388669A CN201410612888.4A CN201410612888A CN104388669A CN 104388669 A CN104388669 A CN 104388669A CN 201410612888 A CN201410612888 A CN 201410612888A CN 104388669 A CN104388669 A CN 104388669A
- Authority
- CN
- China
- Prior art keywords
- titanium
- vanadium
- ore
- sample
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
一种提高含铬型钒钛烧结矿转鼓强度的方法，按以下步骤进行：（1）准备钒钛矿细粉料、铁矿细粉料和CaO粉；（2）制备钒钛矿试样、铁矿试样和CaO试样；（3）测定含铬型钒钛磁铁矿和铁矿与CaO的同化性温度；（4）测定液相流动性；（5）测定粘结相强度；（6）测定连晶强度；（7）建立数据库；（8）对数据进行无量纲化处理；（9）按上述数据库进行互补配矿。本发明的方法工作量小，效果显著，可高效的应对日趋复杂的原料来源以及生产中的突发变料。
A method for improving the drum strength of chromium-containing vanadium-titanium sintered ore, which is carried out according to the following steps: (1) preparing vanadium-titanium ore fine powder, iron ore fine powder and CaO powder; (2) preparing vanadium-titanium ore sample , Iron ore samples and CaO samples; (3) Determination of the assimilation temperature of chromium-containing vanadium-titanium magnetite and iron ore with CaO; (4) Determination of liquid phase fluidity; (5) Determination of binder phase strength; (6) Determination of crystal connection strength; (7) Establishment of database; (8) Dimensionless processing of data; (9) Complementary ore blending according to the above database. The method of the invention has small workload and remarkable effect, and can efficiently deal with increasingly complex raw material sources and sudden material changes in production.
Description
技术领域 technical field
本发明属于矿物加工技术领域，特别涉及一种提高含铬型钒钛烧结矿转鼓强度的方法。 The invention belongs to the technical field of mineral processing, and in particular relates to a method for increasing the drum strength of chromium-containing vanadium-titanium sintered ore. the
背景技术 Background technique
烧结矿是高炉炼铁的主要原料，转鼓强度是衡量烧结矿质量的重要指标，该指标用来衡量烧结矿机械强度的好坏，转鼓强度较高的烧结矿在入高炉冶炼时其粒度均匀透气性好，且在转运过程中不易产生粉尘，可以保证高炉获得良好的冶炼条件，提高高炉利用系数和降低冶炼成本。 Sinter is the main raw material for blast furnace ironmaking. Drum strength is an important index to measure the quality of sinter. This index is used to measure the mechanical strength of sinter. The uniform air permeability is good, and it is not easy to generate dust during the transfer process, which can ensure good smelting conditions for the blast furnace, improve the utilization factor of the blast furnace and reduce the smelting cost. the
我国有丰富的钒钛磁铁矿资源，主要分布在攀西和承德地区，其中攀西地区已探明的远景储量超过100亿吨，承德地区已探明的储量超过80亿吨。钒钛磁铁矿是一种多元共生矿，主要以铁、钒、钛为主，含铬型钒钛矿不仅含有铁、钒、钛还伴随有铬，因此具有更高的冶炼价值。同时，随着富矿比例的减少以及钢铁生产面临的生产成本等问题，在满足生产要求的情况下最大比例的使用高附加值的低廉的含铬型钒钛磁铁矿具有重要的意义，然而，对于烧结生产来说，由于含铬型钒钛烧结矿自身的特点，尤其是TiO2的存在，其在烧结过程产生高熔点的易碎的不具有粘结性的钙钛矿，同时减少了含铬型钒钛烧结矿中的有效粘结相，从而导致含铬型钒钛烧结矿强度较低，常常不能满足生产需求。 my country is rich in vanadium-titanium magnetite resources, which are mainly distributed in Panxi and Chengde areas. The proven reserves in Panxi area exceed 10 billion tons, and the proven reserves in Chengde area exceed 8 billion tons. Vanadium-titanium magnetite is a multi-element symbiotic ore, mainly composed of iron, vanadium and titanium. Chromium-containing vanadium-titanium ore not only contains iron, vanadium, titanium but also chromium, so it has higher smelting value. At the same time, with the reduction of the proportion of rich ore and the production costs faced by iron and steel production, it is of great significance to use the largest proportion of high value-added and low-cost chromium-containing vanadium-titanium magnetite under the condition of meeting the production requirements. However, For sintering production, due to the characteristics of the chromium-containing vanadium-titanium sinter itself, especially the existence of TiO 2 , it produces a high-melting point brittle non-caking perovskite during the sintering process, and at the same time reduces the content of The effective binder phase in chromium-type vanadium-titanium sinters leads to low strength of chromium-containing vanadium-titanium sinters, which often cannot meet production requirements.
因此为了提高烧结矿的转鼓强度，往往需要通过改变原料结构，优化烧结工艺来实现，如强化制粒，提高料层高度，优化布料，提高烧结矿的碱度，控制水分，优化料温等。但是通过优化工艺提高烧结矿强度具有很大的滞后性，不能满足现代烧结生产快速变料，且每一次进行优化工艺均耗费大量的人力，物力以及财力，且传统的改变原料结构措施往往通过大量的烧结杯试验来摸索，同样需要消耗大量的人力，物力以及财力，且不能及时高效的提高烧结矿的转鼓强度。 Therefore, in order to improve the drum strength of sinter, it is often necessary to change the raw material structure and optimize the sintering process, such as strengthening granulation, increasing the height of the material layer, optimizing the distribution, increasing the alkalinity of the sinter, controlling moisture, optimizing material temperature, etc. . However, improving the strength of sinter by optimizing the process has a large lag, which cannot meet the rapid material change of modern sinter production, and each optimization process consumes a lot of manpower, material and financial resources, and the traditional measures to change the structure of raw materials are often passed through a large number of It also needs to consume a lot of manpower, material resources and financial resources, and it cannot improve the drum strength of sintered ore in a timely and efficient manner. the
发明内容 Contents of the invention
针对现有优化含铬型钒钛烧结矿转鼓强度的方法存在的上述问题，本发明提供一种提高含铬型钒钛烧结矿转鼓强度的方法，通过将含铬型钒钛磁铁矿与铁矿粉磨细后制成试样，测定试样的同化性温度，再测定铁矿粉（不含钒钛铬）的液相流动性、粘接相强度和连晶强度，建立数据库用于选用铁矿粉与该含铬型钒钛磁铁矿配矿，快速、高效、低成本的获得最佳配矿方案。 Aiming at the above-mentioned problems existing in the existing method for optimizing the drum strength of chromium-containing vanadium-titanium sintered ore, the present invention provides a method for improving the drum strength of chromium-containing vanadium-titanium sintered ore, by adding chromium-containing vanadium-titanium magnetite Grind it with iron ore powder to make a sample, measure the assimilation temperature of the sample, and then measure the liquid phase fluidity, bonding phase strength and crystal connection strength of the iron ore powder (excluding vanadium, titanium and chromium), and use it to establish a database By choosing iron ore powder and the chromium-containing vanadium-titanium magnetite for ore blending, the best ore blending scheme can be obtained quickly, efficiently and at low cost. the
本发明的提高含铬型钒钛烧结矿转鼓强度的方法按以下步骤进行： The method for improving the drum strength of chromium-containing type vanadium-titanium sintered ore of the present invention is carried out according to the following steps:
1、将含铬型钒钛磁铁矿粉细磨至粒度≤0.074mm，在110±2℃条件下烘干至少2小时，制成钒钛矿细粉料；将铁矿粉细磨至粒度≤0.074mm，在110±2℃条件下烘干至少2小时，制成铁矿细粉料；准备粒度≤0.074mm的CaO粉； 1. Finely grind the chromium-containing vanadium-titanium magnetite powder to a particle size of ≤0.074mm, and dry it at 110±2°C for at least 2 hours to make a vanadium-titanium ore fine powder; finely grind the iron ore powder to a particle size ≤0.074mm, dry at 110±2°C for at least 2 hours to make iron ore fine powder; prepare CaO powder with particle size ≤0.074mm;
2、将钒钛矿细粉料在15~16Mpa压制压力下保持2~3min，制成圆柱状的钒钛矿试样；将铁矿细粉料在15~16Mpa压制压力下保持2~3min，制成圆柱状的铁矿试样；将CaO 粉在15~16Mpa压制压力下保持2~3min，制成圆柱状的CaO试样； 2. Keep the vanadium-titanium ore fine powder under a pressing pressure of 15-16Mpa for 2-3 minutes to make a cylindrical vanadium-titanium ore sample; keep the iron ore fine powder under a pressing pressure of 15-16Mpa for 2-3 minutes, Make a cylindrical iron ore sample; keep the CaO powder under a pressing pressure of 15~16Mpa for 2~3min to make a cylindrical CaO sample;
3、将钒钛矿试样和铁矿试样分别放在CaO试样的上面，然后放入高温试验炉，在空气气氛中测定含铬型钒钛磁铁矿和铁矿与CaO的同化性温度； 3. Put the vanadium-titanium ore sample and the iron ore sample on the top of the CaO sample respectively, and then put them into a high-temperature test furnace to measure the assimilation of chromium-containing vanadium-titanium magnetite and iron ore with CaO in an air atmosphere temperature;
4、将钒钛矿细粉料和铁矿细粉料分别与CaO粉按总碱度为2.0~6.0的配比混合均匀，再在15~16Mpa压制压力下保持2~3min，分别制成圆柱状钒钛-CaO试样和铁-CaO试样；将钒钛-CaO试样和铁-CaO试样分别放入高温试验炉，分别在1250±10℃和氮气气氛条件下恒温烧结4~5min，然后分别测定两种试样的液相流动性； 4. Mix vanadium-titanium ore fine powder and iron ore fine powder with CaO powder according to the proportion of total alkalinity of 2.0~6.0, and then keep it under 15~16Mpa pressing pressure for 2~3min, and make cylinders respectively vanadium-titanium-CaO sample and iron-CaO sample; put the vanadium-titanium-CaO sample and iron-CaO sample into the high-temperature test furnace respectively, and sinter at a constant temperature of 1250±10°C and nitrogen atmosphere for 4~5min. , and then measure the fluidity of the liquid phase of the two samples respectively;
5、将钒钛矿细粉料和铁矿细粉料分别与CaO粉按总碱度为1.7~2.7的配比混合均匀，再在15~16Mpa压制压力下保持2~3min，分别制成圆柱状钒钛-CaO待烧结试样和铁-CaO待烧结试样；将钒钛-CaO待烧结试样和铁-CaO待烧结试样分别放入高温试验炉，分别在1280±10℃和氮气气氛条件下恒温烧结4~5min，分别制备成钒钛-CaO烧结后试样和铁-CaO烧结后试样，冷却后分别采用压力机测定两种烧结后试样的抗压强度，即为铁矿粉和磁铁矿粉的粘结相强度； 5. Mix vanadium-titanium ore fine powder and iron ore fine powder with CaO powder according to the proportion of total alkalinity of 1.7~2.7, and then keep it under 15~16Mpa pressing pressure for 2~3min, and make cylinders respectively Vanadium-titanium-CaO sample to be sintered and iron-CaO sample to be sintered; put the vanadium-titanium-CaO sample to be sintered and the iron-CaO sample to be sintered into the high-temperature test furnace, respectively, at 1280±10°C and nitrogen Sintering at a constant temperature for 4-5 minutes under atmospheric conditions, respectively prepared into vanadium-titanium-CaO sintered samples and iron-CaO sintered samples, and after cooling, use a press to measure the compressive strength of the two sintered samples. Binder phase strength of mineral powder and magnetite powder;
6、将钒钛试样和铁矿试样分别放入高温试验炉，在1280±10℃和氮气气氛条件下恒温烧结4~5min，分别制备成钒钛烧结后试样和铁矿烧结后试样，冷却后分别在压力机下测定两种烧结后试样的抗压强度，即为铁矿粉和磁铁矿粉的连晶强度； 6. Put the vanadium-titanium sample and the iron ore sample into the high-temperature test furnace respectively, and sinter at a constant temperature of 1280±10°C and a nitrogen atmosphere for 4~5min, and prepare the vanadium-titanium sintered sample and the iron ore sintered sample respectively. After cooling, measure the compressive strength of the two sintered samples under the press respectively, which is the intercrystalline strength of iron ore powder and magnetite powder;
7、建立含铬型钒钛铁矿粉以及铁矿粉的同化性、液相流动性、粘结相强度和连晶强度数据库； 7. Establish a database of chromium-containing vanadium-titanite powder and iron ore powder's assimilability, liquid phase fluidity, binder phase strength and crystal connection strength;
8、对数据进行无量纲化处理； 8. Dimensionless processing of data;
9、按上述数据库，针对含铬型钒钛粉的一个或多个较差特性，选用该特性较好的铁矿粉与其进行互补配矿，确定各指标的权重为：液相流动性指数50%，粘结相强度20%，同化性温度20%，连晶强度10%；配矿后试样的权重指数>3。 9. According to the above database, in view of one or more poor properties of chromium-containing vanadium titanium powder, select iron ore powder with better properties for complementary ore blending, and determine the weight of each index as follows: liquid phase fluidity index 50 %, binder phase strength 20%, assimilation temperature 20%, intercrystalline strength 10%; the weight index of the sample after ore blending is >3.
上述方法中，在同一批实验中各步骤均采用的相同的压制压力，保持相同的时间；并且钒钛矿试样和铁矿试样的直径相等，铁矿试样与氧化钙试样的直径比为1:（2~3）。 In the above-mentioned method, the same pressing pressure that each step all adopts in the same batch of experiments keeps the same time; The ratio is 1: (2~3). the
上述的步骤7中，当最低同化温度小于1200℃时，判定铁矿粉有高同化性；最低同化温度在1200~1250℃范围内时，判定铁矿粉有较高同化性；最低同化温度在1250~1280℃范围内时，判定铁矿粉有中等同化性；最低同化温度大于1280℃时，判定铁矿粉有弱同化性；流动性指数在0.7~1.6之间为合理，低于0.7说明试样的流动性差；粘结相强度和连晶强度大于2000N为合理。 In the above step 7, when the minimum assimilation temperature is less than 1200°C, it is judged that the iron ore powder has high assimilability; when the minimum assimilation temperature is in the range of 1200~1250°C, it is judged that the iron ore powder has high assimilability; When the temperature ranges from 1250 to 1280°C, it is judged that the iron ore powder has moderate assimilability; when the minimum assimilation temperature is greater than 1280°C, it is judged that the iron ore powder has weak assimilability; the fluidity index is reasonable between 0.7 and 1.6, and if it is lower than 0.7, it means The fluidity of the sample is poor; it is reasonable for the bonded phase strength and intercrystalline strength to be greater than 2000N. the
上述的步骤8中，无量纲化处理是指：设定同化性温度<1200℃时值为5, 1200~1250℃时值为4，1250~1280℃时值为3，1280~1320℃时值为2，>1320℃时值为1；设定流动性指数>1.6时值为5，1.0~1.6时值为4，0.6~1.0时值为3，0.1~0.6时值为2，<0.1时值为1；设定粘结相强度>5000N时值为5, 3500~5000N时值为4，2000~3500N时值为3，1000~2000N时值为2，<1000N时值为1；设定连晶强度>5000N时值为5, 3500~5000N时值为4，2000~3500N时值为3，1000~2000N时值为2，<1000N时值为1。 In the above step 8, the dimensionless treatment refers to: set the value of assimilation temperature <1200°C to 5, the value of 1200~1250°C to 4, the value of 1250~1280°C to 3, and the value of 1280~1320°C When the fluidity index is >1.6, the value is 5, when it is 1.0~1.6, it is 4, when it is 0.6~1.0, it is 3, when it is 0.1~0.6, it is 2, when it is <0.1 The value is 1; when the bonding phase strength is >5000N, the value is 5; when the value is 3500~5000N, the value is 4; when the value is 2000~3500N, the value is 3; when the value is 1000~2000N, the value is 2; The value of bonding strength is 5 when it is >5000N, 4 when it is 3500~5000N, 3 when it is 2000~3500N, 2 when it is 1000~2000N, and 1 when it is <1000N. the
上述的步骤9中，为提高烧结矿中钒含量，在满足转鼓强度要求的情况下选取钒钛矿含量最多的配比；基于烧结基础特性，对钒钛粉优化配矿提高其强度时，首先考虑普粉液相流动性，其次为粘结相强度和同化性，最后是连晶强度；通过研究各指标对转鼓指数的影响规律，得到各指标和试样的权重标准。 In the above-mentioned step 9, in order to increase the vanadium content in the sintered ore, the proportioning with the most vanadium-titanium ore content is selected under the condition of meeting the strength requirements of the drum; Firstly, the fluidity of the common powder liquid phase is considered, followed by the strength and assimilation of the binder phase, and finally the crystal connection strength; by studying the influence of each index on the drum index, the weight standards of each index and sample are obtained. the
上述方法完成后，对选出的一组或多组优选组合，进行烧结杯试验，得到烧结矿后按ISO3271标准测定转鼓强度，验证其值是否达到要求。 After the above method is completed, conduct a sintering cup test on one or more selected groups of preferred combinations, and measure the strength of the drum according to the ISO3271 standard after obtaining the sintered ore to verify whether the value meets the requirements. the
上述的含铬型钒钛铁矿粉的铁品位TFe在50.0~68.0%，按照重量百分比含SiO2 3.0~5.0%，TiO2 1.0~5.0%，Cr2O3 0.1~1.0%；上述的铁矿粉的铁品位TFe在54~65%，按重量百分比含SiO2 4.8~6.5%。 The iron grade TFe of the above-mentioned chromium-containing vanadium-titanite powder is 50.0-68.0%, and contains SiO 2 3.0-5.0%, TiO 2 1.0-5.0%, Cr 2 O 3 0.1-1.0% according to weight percentage; the above-mentioned iron The iron grade TFe of the ore powder is 54~65%, and the content of SiO 2 is 4.8~6.5% by weight.
上述方法的原理在于：虽然钒钛粉同化性、粘结相强度和连晶强度较好，但是由于钒钛粉液相流动性不足，造成钒钛烧结矿中有效液相量不足，是导致钒钛粉转鼓强度较差的最主要的原因，基于烧结基础特性将液相流动性好的普粉与其进行优化配矿可有效提高混合铁粉的液相流动性，提高烧结矿粘结相数量，减少烧结矿孔洞，提高钒钛烧结矿强度。在有效液相量具有较适宜的水平下，粘结相强度及连晶强度对转鼓强度有重要影响。 The principle of the above method is that although the vanadium-titanium powder has good assimilability, bonded phase strength and intercrystalline strength, the effective liquid phase in the vanadium-titanium sintered ore is insufficient due to insufficient fluidity of the liquid phase of the vanadium-titanium powder, which is the cause of the vanadium-titanium sinter. The most important reason for the poor strength of the titanium powder drum is that based on the basic characteristics of sintering, the optimal blending of common powder with good liquid phase fluidity and ore can effectively improve the liquid phase fluidity of mixed iron powder and increase the amount of sinter binder phase , reduce sinter pores, improve the strength of vanadium-titanium sinter. When the amount of effective liquid phase has a relatively suitable level, the strength of the binder phase and the strength of the crystal connection have an important influence on the strength of the drum. the
传统的烧结矿转鼓强度的配矿优选方法，从本质上而言，属于试探性配矿，故盲目性大，从而耗费的人力、财力较多；并且由于不清楚铁矿石的互补特性，很难实现真正意义上的优选；按照本方法进行优选，使真正意义上的烧结自主优化配矿成为可能，通过对铁矿石的烧结基础特性的把握，可建立同时满足烧结矿成本优化和烧结矿转鼓强度优化的新型配矿系统，它不仅能准确预测烧结矿转鼓强度，而且能根据对烧结矿的质量要求产生优化的烧结配矿方案。 The traditional ore blending and optimization method of sinter drum strength is essentially a tentative ore blending method, so it is blind, which consumes a lot of manpower and financial resources; and because the complementary characteristics of iron ore are not clear, It is difficult to achieve optimization in the true sense; according to the method of optimization, it is possible to optimize the sintering in the true sense. By grasping the basic characteristics of sintering of iron ore, it is possible to establish sintering cost optimization and sintering at the same time. A new ore blending system for optimizing the strength of the ore drum, which can not only accurately predict the strength of the sinter drum, but also produce an optimized sinter blending scheme according to the quality requirements of the sinter. the
本发明的特点在于不需要对烧结工艺进行改造，无需大量的烧结杯试验，仅仅需要通过对含铬型钒钛矿粉以及铁矿粉（不含钒钛铬）的同化性、液相流动性、粘结相强度以及连晶强度进行检测，建立铁矿粉四种特性的数据库，根据含铬型钒钛粉四种特性的优劣，选择相应的互补性的铁矿粉与其进行配矿，通过少量的烧结杯试验就达到了优选含铬型钒钛烧结矿转鼓强度的目的，工作量小，效果显著，可高效的应对日趋复杂的原料来源以及生产中的突发变料。 The feature of the present invention is that it does not need to modify the sintering process, and does not need a large number of sintering cup tests. It only needs to pass the assimilation and liquid phase fluidity of chromium-containing vanadium-titanium ore powder and iron ore powder (excluding vanadium-titanium-chrome) , bonding phase strength and crystal connection strength are tested, and a database of the four characteristics of iron ore powder is established. According to the advantages and disadvantages of the four characteristics of chromium-containing vanadium titanium powder, the corresponding complementary iron ore powder is selected for ore blending. Through a small amount of sintering cup tests, the purpose of optimizing the strength of the chromium-containing vanadium-titanium sinter drum is achieved. The workload is small and the effect is remarkable. It can efficiently deal with increasingly complex raw material sources and sudden material changes in production. the
附图说明 Description of drawings
图1为本发明的提高含铬型钒钛烧结矿转鼓强度的方法流程示意图； Fig. 1 is a schematic flow sheet of the method for improving the drum strength of chromium-containing type vanadium-titanium sintered ore of the present invention;
图2为本发明的方法中步骤3的同化性测试方法示意图；图中上方试样为铁矿试样，下方为CaO试样； Fig. 2 is the schematic diagram of the assimilation testing method of step 3 in the method of the present invention; The top sample in the figure is an iron ore sample, and the bottom is a CaO sample;
图3为图2的同化性测试结果图，图中两种试样相连接处的黑色部分为两试样进行了同化反应的生成样，图中，A为没有同化（两者无反应），B为同化反应（铁矿试样在CaO试样上留下一圈黑色印记），C为过融（铁矿试样明显变形）；进行同化反应时的温度即为同化温度； Figure 3 is the graph of the assimilation test results in Figure 2. The black part at the junction of the two samples in the figure is the sample produced by the assimilation reaction of the two samples. In the figure, A is no assimilation (no reaction between the two), B is the assimilation reaction (the iron ore sample leaves a circle of black marks on the CaO sample), C is over-melting (the iron ore sample is obviously deformed); the temperature when the assimilation reaction is carried out is the assimilation temperature;
图4为本发明的方法中步骤4的液相流动性测试方法示意图；图中，上方试样为钒钛-CaO试样或铁-CaO试样，下方为镍片； Fig. 4 is the schematic diagram of the liquid phase fluidity test method of step 4 in the method of the present invention; Among the figures, the top sample is a vanadium-titanium-CaO sample or an iron-CaO sample, and the bottom is a nickel sheet;
图5为图4的流动性测试结果图，图中上图为反应前，试样的面积为S1；下图为反应后，试样的面积为S2；流动性指数=（S2- S1）/ S1； Fig. 5 is the fluidity test result graph of Fig. 4, the upper graph in the figure is before the reaction, the area of the sample is S 1 ; the lower graph is after the reaction, the area of the sample is S 2 ; fluidity index = (S 2 - S 1 )/S 1 ;
图6为本发明的方法中步骤5的粘结相强度测试方法示意图；图中，上方试样为钒钛-CaO试样或铁-CaO试样，下方为镍片； Fig. 6 is the schematic diagram of the bonding phase strength testing method of step 5 in the method of the present invention; Among the figure, the top sample is a vanadium-titanium-CaO sample or an iron-CaO sample, and the bottom is a nickel sheet;
图7为本发明的方法中步骤6的连晶强度测试方法示意图；图中，上方试样为钒钛-CaO试样或铁-CaO试样，下方为镍片； Fig. 7 is a schematic diagram of the method for testing the bonding strength of step 6 in the method of the present invention; among the figures, the upper sample is a vanadium-titanium-CaO sample or an iron-CaO sample, and the lower part is a nickel sheet;
图8为本发明实施例1中的烧结矿在Leica DM1750M电子显微镜下得到的电子显微图； Fig. 8 is the electron micrograph that the sintered ore in the embodiment of the present invention 1 obtains under Leica DM1750M electron microscope;
图9为本发明实施例4中对比实验获得的烧结矿在Leica DM1750M电子显微镜下得到的电子显微图。 Fig. 9 is an electron micrograph obtained under a Leica DM1750M electron microscope of the sintered ore obtained in the comparative experiment in Example 4 of the present invention.
具体实施方式 Detailed ways
下面结合附图和实施例对本发明进一步说明。 The present invention will be further described below in conjunction with the accompanying drawings and embodiments. the
本发明实施例中观测显微结构采用的设备为Leica DM1750M电子显微镜； The equipment that observation microstructure adopts in the embodiment of the present invention is Leica DM1750M electron microscope;
本发明实施例中采用的高温实验炉为SJ-2013红外线快速高温试验炉。 The high-temperature experimental furnace adopted in the embodiment of the present invention is the SJ-2013 infrared rapid high-temperature experimental furnace.
本发明实施例中采用的烧结设备为NEU-2012型烧结机。 The sintering equipment used in the embodiment of the present invention is a NEU-2012 sintering machine. the
本发明实施例中采用的试样制备设备为ZY-700型自动退模制样器。 The sample preparation equipment used in the embodiment of the present invention is a ZY-700 automatic demoulding sample maker. the
本发明实施例中采用的抗压强度测试设备为ZQYC-10C型抗压强度测定仪。 The compressive strength test equipment adopted in the embodiment of the present invention is a ZQYC-10C compressive strength tester. the
本发明实施例中制备的钒钛矿试样和铁矿试样的重量为0.8~1.0g，直径8~10mm；制备的CaO试样的重量为2.0~2.5g，直径16~25mm。 The weight of the vanadium-titanium ore sample and the iron ore sample prepared in the embodiment of the present invention is 0.8-1.0 g, and the diameter is 8-10 mm; the weight of the prepared CaO sample is 2.0-2.5 g, and the diameter is 16-25 mm. the
本发明实施例中制备的钒钛-CaO待烧结试样、铁-CaO待烧结试样、钒钛-CaO试样和铁-CaO试样的重量为0.8~1.0g，直径8~10mm。 The vanadium-titanium-CaO sample to be sintered, the iron-CaO sample to be sintered, the vanadium-titanium-CaO sample and the iron-CaO sample prepared in the examples of the present invention have a weight of 0.8-1.0 g and a diameter of 8-10 mm. the
本发明实施例中制备的试样的高度为5mm。 The height of the sample prepared in the embodiment of the present invention is 5 mm. the
本发明实施例中烧结杯试验的参数为：料层高度700mm，烧结杯直径320mm，点火负压5.0kPa，烧结负压10.0kPa，点火温度 1000℃，点火时间2min，铺底料高度20mm，制粒时间8min。 The parameters of the sintering cup test in the embodiment of the present invention are: material layer height 700mm, sintering cup diameter 320mm, ignition negative pressure 5.0kPa, sintering negative pressure 10.0kPa, ignition temperature 1000°C, ignition time 2min, bed material height 20mm, granulation The time is 8 minutes. the
本发明实施例中的含铬型钒钛铁矿粉和铁矿粉由承德建龙特殊钢有限公司提供，含铬型钒钛铁矿粉的型号为HC、DB、HW、YT、JL和FH，铁矿粉的型号为YD、NF或PT。 The chromium-containing vanadium-titanite powder and iron ore powder in the embodiment of the present invention are provided by Chengde Jianlong Special Steel Co., Ltd., and the models of the chromium-containing vanadium-titanite powder are HC, DB, HW, YT, JL and FH , the model of iron ore powder is YD, NF or PT. the
实施例1 Example 1
1、将含铬型钒钛磁铁矿粉细磨至粒度≤0.074mm，在110±2℃条件下烘干至少2小时，制成钒钛矿细粉料；将铁矿粉细磨至粒度≤0.074mm，在110±2℃条件下烘干至少2小时，制成铁矿细粉料；准备粒度≤0.074mm的CaO粉； 1. Finely grind the chromium-containing vanadium-titanium magnetite powder to a particle size of ≤0.074mm, and dry it at 110±2°C for at least 2 hours to make a vanadium-titanium ore fine powder; finely grind the iron ore powder to a particle size ≤0.074mm, dry at 110±2°C for at least 2 hours to make iron ore fine powder; prepare CaO powder with particle size ≤0.074mm;
2、将钒钛矿细粉料在15~16Mpa压制压力下保持2~3min，制成圆柱状的钒钛矿试样；将铁矿细粉料在15~16Mpa压制压力下保持2~3min，制成圆柱状的铁矿试样；将CaO 粉在15~16Mpa压制压力下保持2~3min，制成圆柱状的CaO试样； 2. Keep the vanadium-titanium ore fine powder under a pressing pressure of 15-16Mpa for 2-3 minutes to make a cylindrical vanadium-titanium ore sample; keep the iron ore fine powder under a pressing pressure of 15-16Mpa for 2-3 minutes, Make a cylindrical iron ore sample; keep the CaO powder under a pressing pressure of 15~16Mpa for 2~3min to make a cylindrical CaO sample;
要求上述的各试样在制备时在相同压力下保持相同时间，并且钒钛矿试样和铁矿试样的直径相等，铁矿试样与氧化钙试样的直径比为1:2.5； It is required that each of the above-mentioned samples is kept at the same pressure for the same time during preparation, and the diameters of the vanadium-titanium ore sample and the iron ore sample are equal, and the diameter ratio of the iron ore sample and the calcium oxide sample is 1:2.5;
3、将钒钛矿试样和铁矿试样分别放在CaO试样的上面，然后放入高温试验炉，在空气气氛中测定含铬型钒钛磁铁矿和铁矿与CaO的同化性温度； 3. Put the vanadium-titanium ore sample and the iron ore sample on the top of the CaO sample respectively, and then put them into a high-temperature test furnace to measure the assimilation of chromium-containing vanadium-titanium magnetite and iron ore with CaO in an air atmosphere temperature;
4、将钒钛矿细粉料和铁矿细粉料分别与CaO粉按总碱度为2.0~6.0的配比混合均匀，再在15~16Mpa压制压力下保持2~3min，分别制成圆柱状的钒钛-CaO试样和铁-CaO试样；将钒钛-CaO试样和铁-CaO试样分别放入高温试验炉，分别在1250±10℃和氮气气氛条件下恒温烧结4~5min，然后分别测定两种试样的液相流动性； 4. Mix vanadium-titanium ore fine powder and iron ore fine powder with CaO powder according to the proportion of total alkalinity of 2.0~6.0, and then keep it under 15~16Mpa pressing pressure for 2~3min, and make cylinders respectively vanadium-titanium-CaO sample and iron-CaO sample; put the vanadium-titanium-CaO sample and iron-CaO sample into the high-temperature test furnace respectively, and sinter at a constant temperature of 1250±10°C and a nitrogen atmosphere for 4~ 5min, and then measure the fluidity of the liquid phase of the two samples respectively;
5、将钒钛矿细粉料和铁矿细粉料分别与CaO粉按总碱度为1.7~2.7的配比混合均匀，再在15~16Mpa压制压力下保持2~3min，分别制成圆柱状的钒钛-CaO待烧结试样和铁-CaO待烧结试样；将钒钛-CaO待烧结试样和铁-CaO待烧结试样分别放入高温试验炉，分别在1280±10℃和氮气气氛条件下恒温烧结4~5min，分别制备成钒钛-CaO烧结后试样和铁-CaO烧结后试样，冷却后分别采用压力机测定两种烧结后试样的抗压强度，即为铁矿粉和磁铁矿粉的粘结相强度； 5. Mix vanadium-titanium ore fine powder and iron ore fine powder with CaO powder according to the proportion of total alkalinity of 1.7~2.7, and then keep it under 15~16Mpa pressing pressure for 2~3min, and make cylinders respectively The vanadium-titanium-CaO sample to be sintered and the iron-CaO sample to be sintered; the vanadium-titanium-CaO sample to be sintered and the iron-CaO sample to be sintered were placed in a high-temperature test furnace, respectively, at 1280±10°C and Sintering at a constant temperature for 4~5min under nitrogen atmosphere, and then preparing vanadium-titanium-CaO sintered samples and iron-CaO sintered samples respectively. Binder phase strength of iron ore fines and magnetite fines;
6、将钒钛试样和铁矿试样分别放入高温试验炉，在1280±10℃和氮气气氛条件下恒温烧结4~5min，分别制备成钒钛试烧结后试样和铁矿烧结后试样，冷却后分别在压力机下测定两种烧结后试样的抗压强度，即为铁矿粉和磁铁矿粉的连晶强度； 6. Put the vanadium-titanium sample and the iron ore sample into the high-temperature test furnace respectively, and sinter at a constant temperature of 1280±10°C and a nitrogen atmosphere for 4~5min, and prepare the vanadium-titanium test sample and the iron ore sintered sample respectively. After cooling the sample, measure the compressive strength of the two sintered samples under the press respectively, which is the intercrystalline strength of iron ore powder and magnetite powder;
7、建立含铬钒钛铁矿粉以及铁矿粉的同化性、液相流动性、粘结相强度和连晶强度数据库； 7. Establish a database of the assimilability, liquid phase fluidity, binder phase strength and joint crystal strength of chromium-vanadium-containing ilmenite powder and iron ore powder;
数据库如表1所示； The database is shown in Table 1;
表1 Table 1
当最低同化温度小于1200℃时，判定铁矿粉有高同化性；最低同化温度在1200~1250℃范围内时，判定铁矿粉有较高同化性；最低同化温度在1250~1280℃范围内时，判定铁矿粉有中等同化性；最低同化温度大于1280℃时，判定铁矿粉有弱同化性；流动性指数在0.7~1.6之间为合理，低于0.7说明试样的流动性差；粘结相强度和连晶强度大于2000N为合理； When the minimum assimilation temperature is less than 1200°C, it is judged that the iron ore powder has high assimilability; when the minimum assimilation temperature is in the range of 1200~1250°C, it is judged that the iron ore powder has high assimilability; the minimum assimilation temperature is in the range of 1250~1280°C When the minimum assimilation temperature is greater than 1280°C, it is judged that the iron ore powder has moderate assimilability; when the minimum assimilation temperature is greater than 1280°C, it is judged that the iron ore powder has weak assimilability; the fluidity index is reasonable between 0.7 and 1.6, and if it is lower than 0.7, it indicates that the fluidity of the sample is poor; It is reasonable that the bonding phase strength and crystal connection strength are greater than 2000N;
8、对数据进行无量纲化处理；设定同化性温度<1200℃时值为5, 1200~1250℃时值为4，1250~1280℃时值为3，1280~1320℃时值为2，>1320℃时值为1；设定碱度4.0的试样流动性指数>1.6时值为5，1.0~1.6时值为4，0.6~1.0时值为3，0.1~0.6时值为2，<0.1时值为1；设定粘结相强度>5000N时值为5, 3500~5000N时值为4，2000~3500N时值为3，1000~2000N时值为2，<1000N时值为1；设定连晶强度>5000N时值为5, 3500~5000N时值为4，2000~3500N时值为3，1000~2000N时值为2，<1000N时值为1； 8. Carry out dimensionless processing on the data; set the value of assimilation temperature <1200°C to 5, the value of 1200~1250°C to 4, the value of 1250~1280°C to 3, the value of 1280~1320°C to 2, The value is 1 when the temperature is >1320℃; the value is 5 when the fluidity index of the sample with an alkalinity of 4.0 is >1.6, the value is 4 when the value is 1.0~1.6, the value is 3 when the value is 0.6~1.0, and the value is 2 when the value is 0.1~0.6. When <0.1, the value is 1; when the bonding phase strength is set to >5000N, the value is 5, when the value is 3500~5000N, the value is 4, when the value is 2000~3500N, the value is 3, when the value is 1000~2000N, the value is 2, and when the value is <1000N, the value is 1 ;Set the value of bonding strength>5000N to 5, the value of 3500~5000N to 4, the value of 2000~3500N to 3, the value of 1000~2000N to 2, and the value of <1000N to 1;
9、按上述数据库，针对含铬型钒钛粉的一个或多个较差特性，选用该特性较好的铁矿粉与其进行互补配矿，各指标的权重为：液相流动性指数50%，粘结相强度20%，同化性温度20%，连晶强度10%；为提高烧结矿中钒含量，在满足转鼓强度要求的情况下选取钒钛矿含量最多的配比； 9. According to the above database, for one or more poor properties of chromium-containing vanadium-titanium powder, select iron ore powder with better properties for complementary ore blending, and the weight of each index is: liquid phase fluidity index 50% , the bonding phase strength is 20%, the assimilation temperature is 20%, and the intergranular strength is 10%; in order to increase the vanadium content in the sintered ore, the ratio with the most vanadium-titanium ore content is selected under the condition of meeting the drum strength requirements;
根据表1，进行无量纲化处理后，选取钒钛矿配比最多的配比，比例梯度设为10%，根据数据库选取优选组合。当DB:PT为90:10配比时，权重指数= (4*0.9+4*0.1)*0.2+(2*0.9+3*0.1)*0.5+(4*0.9+4*0.1)*0.2+(5*0.9+4*0.1)*0.1=3.14，满足要求。 According to Table 1, after the dimensionless treatment, select the proportion with the largest proportion of vanadium-titanium ore, set the proportion gradient to 10%, and select the optimal combination according to the database. When the ratio of DB:PT is 90:10, the weight index = (4*0.9+4*0.1)*0.2+(2*0.9+3*0.1)*0.5+(4*0.9+4*0.1)*0.2 +(5*0.9+4*0.1)*0.1=3.14, which meets the requirements.
按照DB：PT=90:10的配比，进行烧结杯实验，碱度设定为1.9，外配碳量设定为3.2%，对烧结矿转鼓强度结果进行验证。试验结果为90%DB+10%PT组合时，烧结矿转鼓强度为66.58%，符合要求。 According to the ratio of DB: PT = 90: 10, the sintering cup experiment was carried out, the alkalinity was set to 1.9, and the amount of external carbon was set to 3.2%, to verify the strength results of the sinter drum. The test result shows that when the combination of 90%DB+10%PT, the drum strength of sintered ore is 66.58%, which meets the requirements. the
实施例2 Example 2
根据实施例1表1，将液相流动性较差的含铬型钒钛粉HW与液相流动性较好的铁矿粉PT按照质量比50:50的比例配料，权重指数=3.05，按实施例1的参数进行烧结，获得转鼓强度65.61%的含铬型钒钛烧结矿。 According to Table 1 of Example 1, the chromium-containing vanadium-titanium powder HW with poor liquid phase fluidity and the iron ore powder PT with good liquid phase fluidity are batched according to the ratio of mass ratio 50:50, weight index=3.05, according to The parameters of Example 1 were sintered to obtain chromium-containing vanadium-titanium sintered ore with drum strength of 65.61%.
实施例3 Example 3
根据实施例1表1，将液相流动性较差的含铬型钒钛粉HC与液相普通铁矿粉NF按照质量比50:50的比例配料，权重指数=3.00，按实施例1的参数进行烧结，获得转鼓强度65.09%的含铬型钒钛烧结矿。 According to Table 1 of Example 1, the chromium-containing type vanadium-titanium powder HC with liquid phase fluidity is poor and the liquid phase common iron ore powder NF is batched according to the ratio of mass ratio 50:50, weight index=3.00, according to Example 1 The parameters are sintered to obtain chromium-containing vanadium-titanium sintered ore with drum strength of 65.09%.
实施例4 Example 4
根据实施例1表1，直接将100%含铬型钒钛粉HC配料，按实施例1的参数进行烧结，获得转鼓强度58.26%的含铬型钒钛烧结矿。 According to Table 1 of Example 1, directly mix 100% chromium-containing vanadium-titanium powder HC, and sinter according to the parameters of Example 1 to obtain chromium-containing vanadium-titanium sintered ore with drum strength of 58.26%.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410612888.4A CN104388669B (en) | 2014-11-05 | 2014-11-05 | A kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410612888.4A CN104388669B (en) | 2014-11-05 | 2014-11-05 | A kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104388669A true CN104388669A (en) | 2015-03-04 |
| CN104388669B CN104388669B (en) | 2016-08-17 |
Family
ID=52606625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410612888.4A Active CN104388669B (en) | 2014-11-05 | 2014-11-05 | A kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104388669B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326175A (en) * | 2017-07-04 | 2017-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for reducing high-chromic vanadium-titanium ferroferrite sinter mixture fusing point |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| CN108866324A (en) * | 2018-07-20 | 2018-11-23 | 东北大学 | A method of high-titanium type vanadium-titanium magnetite ore matching is instructed using sintering basic characteristic |
| CN109055732A (en) * | 2018-09-30 | 2018-12-21 | 四川德胜集团钒钛有限公司 | A kind of preparation method of high vanadium titanium ratio sinter |
| CN109752261A (en) * | 2017-11-02 | 2019-05-14 | 上海梅山钢铁股份有限公司 | A method of detection iron ore powder in sintering process binder strength |
| CN112694322A (en) * | 2021-01-28 | 2021-04-23 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
| CN114067926A (en) * | 2021-11-29 | 2022-02-18 | 武汉钢铁有限公司 | Drum strength prediction method for sintering ore of each material layer of sintering trolley |
| CN114438313A (en) * | 2022-02-23 | 2022-05-06 | 重庆钢铁股份有限公司 | Sintering material and batching method thereof |
| CN115261613A (en) * | 2022-05-26 | 2022-11-01 | 柳州钢铁股份有限公司 | Iron ore powder evaluation and comparison method and sinter raw material selection and sintering method |
| CN115612833A (en) * | 2022-10-31 | 2023-01-17 | 山东钢铁股份有限公司 | A screening method and system for iron ore sintering ore blending |
| CN119198529A (en) * | 2024-08-15 | 2024-12-27 | 重庆科技大学 | A method for evaluating the reduction and bonding behavior of hydrogen-based shaft furnace pellets |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2492690A1 (en) * | 2011-02-22 | 2012-08-29 | BIOCRATES Life Sciences AG | Method and use of metabolites for the diagnosis of inflammatory brain injury in preterm born infants |
| CN103258130A (en) * | 2013-05-10 | 2013-08-21 | 宋强 | Method for predicting sinter tumbler strength |
| CN103725872A (en) * | 2013-12-20 | 2014-04-16 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
-
2014
- 2014-11-05 CN CN201410612888.4A patent/CN104388669B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2492690A1 (en) * | 2011-02-22 | 2012-08-29 | BIOCRATES Life Sciences AG | Method and use of metabolites for the diagnosis of inflammatory brain injury in preterm born infants |
| CN103258130A (en) * | 2013-05-10 | 2013-08-21 | 宋强 | Method for predicting sinter tumbler strength |
| CN103725872A (en) * | 2013-12-20 | 2014-04-16 | 攀钢集团成都钢钒有限公司 | Method for improving drum index of vanadium-titanium magnetite sinter |
Non-Patent Citations (1)
| Title |
|---|
| 张勇等: "进口高铬型钒钛磁铁的烧结基础特性", 《钢铁》, vol. 47, no. 12, 31 December 2012 (2012-12-31), pages 19 - 23 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326175B (en) * | 2017-07-04 | 2019-05-28 | 攀钢集团攀枝花钢铁研究院有限公司 | A method of reducing high-chromic vanadium-titanium ferroferrite sinter mixture fusing point |
| CN107326175A (en) * | 2017-07-04 | 2017-11-07 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for reducing high-chromic vanadium-titanium ferroferrite sinter mixture fusing point |
| CN109752261A (en) * | 2017-11-02 | 2019-05-14 | 上海梅山钢铁股份有限公司 | A method of detection iron ore powder in sintering process binder strength |
| CN109752261B (en) * | 2017-11-02 | 2021-05-07 | 上海梅山钢铁股份有限公司 | Method for detecting strength of iron ore powder binding phase in sintering process |
| CN107881331A (en) * | 2017-11-19 | 2018-04-06 | 东北大学 | A kind of method that low chromium type vanadium titano-magnetite prepares sintering deposit with addition of common iron ore |
| CN108866324A (en) * | 2018-07-20 | 2018-11-23 | 东北大学 | A method of high-titanium type vanadium-titanium magnetite ore matching is instructed using sintering basic characteristic |
| CN109055732A (en) * | 2018-09-30 | 2018-12-21 | 四川德胜集团钒钛有限公司 | A kind of preparation method of high vanadium titanium ratio sinter |
| CN112694322B (en) * | 2021-01-28 | 2023-11-10 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
| CN112694322A (en) * | 2021-01-28 | 2021-04-23 | 中冶赛迪技术研究中心有限公司 | Sintered body, preparation method thereof and characterization method of high-temperature spreading behavior |
| CN114067926A (en) * | 2021-11-29 | 2022-02-18 | 武汉钢铁有限公司 | Drum strength prediction method for sintering ore of each material layer of sintering trolley |
| CN114438313B (en) * | 2022-02-23 | 2023-06-27 | 重庆钢铁股份有限公司 | Sintering material and material mixing method thereof |
| CN114438313A (en) * | 2022-02-23 | 2022-05-06 | 重庆钢铁股份有限公司 | Sintering material and batching method thereof |
| CN115261613A (en) * | 2022-05-26 | 2022-11-01 | 柳州钢铁股份有限公司 | Iron ore powder evaluation and comparison method and sinter raw material selection and sintering method |
| CN115261613B (en) * | 2022-05-26 | 2023-11-28 | 柳州钢铁股份有限公司 | Iron ore powder evaluation and comparison method, sinter raw material selection and sintering method |
| CN115612833A (en) * | 2022-10-31 | 2023-01-17 | 山东钢铁股份有限公司 | A screening method and system for iron ore sintering ore blending |
| CN115612833B (en) * | 2022-10-31 | 2025-03-21 | 山东钢铁股份有限公司 | Iron ore sintering and ore selection method and system |
| CN119198529A (en) * | 2024-08-15 | 2024-12-27 | 重庆科技大学 | A method for evaluating the reduction and bonding behavior of hydrogen-based shaft furnace pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104388669B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104388669B (en) | A kind of method improved containing chromium type vanadium titanium sintered ore rotary drum strength | |
| Han et al. | Binders and bonding mechanism for RHF briquette made from blast furnace dust | |
| CN107101898B (en) | Method for measuring characteristic number of bond strength of sinter | |
| CN102127636B (en) | A kind of low SiO2 high-performance sinter preparation method | |
| CN108536997A (en) | A kind of sinter Sintering Model based on material gene determines method and system | |
| CN105366773A (en) | Structured iron-carbon micro-electrolysis filling material and preparation method thereof | |
| CN104894367B (en) | Method for sintering acid pellet and alkaline material mixed super-thick material layer | |
| CN110346538B (en) | A method for measuring the properties of iron ore under the condition of high temperature continuous variable pressure and variable atmosphere | |
| CN110174331A (en) | A kind of agglomeration for iron mine Binder Phase high-temperature moisture measuring method | |
| CN102584191B (en) | Method for preparing cordierite ceramics by using serpentine tailings | |
| CN104862440A (en) | Low-grade iron ore direct reduction method | |
| CN106241803A (en) | A kind of method utilizing waste tyre pyrolytic white carbon black to make activated carbon | |
| CN108866324A (en) | A method of high-titanium type vanadium-titanium magnetite ore matching is instructed using sintering basic characteristic | |
| CN104630458A (en) | Preparation method of acidic chromium-containing vanadium-titanium sintered ore | |
| Ju et al. | Effect of BaSO4 on the compressive strength and reduction behavior of pellets | |
| CN103409619B (en) | Cooled agglomerated pellet and preparation method thereof | |
| Xu et al. | Influence of initial iron ore particle size on CO 2 gasification behavior and strength of ferro-coke | |
| CN205856570U (en) | It is applicable to the electrode for vacuum consumable arc-melting of 600 DEG C of high-temperature titanium alloys | |
| CN106636618A (en) | Fuel gradation homoenergetic sintering method | |
| CN103937962A (en) | A kind of chromite ore ferrochrome separation test method | |
| CN108491678A (en) | A kind of method for building up of sinter gene pool and its application | |
| CN102879400A (en) | Method for visually determining basic metallurgical performance of iron powdered ore | |
| CN110156353A (en) | A method and application of combined treatment of copper slag and magnesium slag | |
| CN103951389B (en) | A kind of preparation method of cobalt base oxide thermoelectric material | |
| CN114067926B (en) | A method for predicting the drum strength of sintered ore in each material layer of a sintering trolley |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180608 Address after: 067201 South horse circle village, North horse circle Town, yingyingyingzi mining area, Chengde, Hebei Patentee after: Chengde Yan Bei Metallurgical Material Co., Ltd. Address before: 110819 No. 3 lane, Heping Road, Heping District, Shenyang, Liaoning 11 Patentee before: Northeastern University |