钢包用刚玉-尖晶石砖

以电熔白刚玉、电熔尖晶石、氧化铝微粉为主要原料,经高温烧成,制成高纯刚玉－尖晶石钢包衬砖。制品性能优良,耐渣蚀、抗渗透。在钢包上使用取得良好效果     

Ultrasonic quality control of ladle brick

Conclusions The relation was determined between the speed of USV and the open porosity of high-density ladle bricks containing a superduty refractory additive and produced by the Bogdanovich Refractories Plant.Calibration charts were plotted which permit the porosity of the various types of brick to be determined from the speed of ultrasound through the brick.Deceased.Translated from Ogneupory, No. 8, pp. 16–18, August, 1978.     

Semiacid clays for making ladle brick

Conclusions The close relationship between the mineral composition, primary and secondary structures of clays, and their properties was confirmed.From semiacid clays we obtained ladle brick whose resistance in service is as good as that of high-grog brick made by the Borovich Refractories Combine.Translated from Ogneupory, No. 4, pp. 22–26, April, 1967.     

Increasing the life of ladle brick

Conclusions A technology was developed for the manufacture of ladle brick of high resistance. The difference between the proposed method and that used at present is in the increase in alumina content of the bond part of the batch. The nonplastic may be ordinary grog made of first or second-grade clays normally used in the manufacture of ladle bricks. The optimum Al₂O₃ content in the bond part of the batch is 55–60%.A compulsory condition for increasing the service life of the ladle brick, in addition to a high content of alumina, is the density of the bonding part of the batch. Therefore, the firing temperature of the goods should be determined not by the porosity of the finished product in general, but by the porosity of the bond part of the batch.The chief norms for the manufacturing technology are as follows: a) a batch content of 50–55% ordinary grog made of first and second-grade clays, water absorption not more than 5%; b) a batch content of 50–45% mixture of combined grist of high-alumina grog and clay; the ratio of grog to clay in the mix should be from 6535 to 7030.The conclusions of the present article have been proved by manufacturing an industrial batch of goods and testing them in linings of ladles [14]. The technology has been included in a project for reconstructing the Bogdanovich refractories plant.     

High-density ladle brick from Arkalyk clay

Conclusions The Bogdanovich Refractories Plant has developed a production technology for a high-quality high-density brick from clay from the Arkalyk deposits. Service tests with the brick showed that it increases the durability of the lining of steelcasting ladles of varied capacity by a factor of 1.6–2.0.To obtain the best results, the Arkalyk clays must be blended before being used.Deceased.Translated from Ogneupory, No. 3, pp. 28–31, March, 1977.     

Tests of olivinite-based ladle refractory brick

A lining of burned forsterite—chromite brick, with the olivinite mined at the Khabozerovskoe deposit as the base, was tested in the 385-ton steel-teerning ladle of the converter plant at the Severstal' Works. The brick was made by the method developed at the St. Petersburg Institute of Refractories. The characteristics of the brick are given. The ladle lining was tested on a wide range of converter steel grades. At the end of the service period, the lining was examined and the nature of its wear was identified. The experimental lining withstood 23 heats. It is thought promising to use refractory brick of the forsterite composition in large-tonnage steel-teeming ladles.     

Results of a competition for the most resistant ladle brick

Conclusions The wear of the Chasov-Yar ladle brick was less than that of bricks made by the other factories; its average resistance for the five ladles was 13.3 melts.The average wear of the ladle brick made by the Zaporozh Plant exceeded the wear of the Chasov-Yar brick. The average resistance of this brick for the five ladles was 13.2 melts.The wear of the ladle brick made at the Belokamen Firebrick Plant is uniform, with only slight washing-out of the joints. The surface of the ladle after service was smooth and glazed.Examining all the materials tested during the competition the award panel awarded: first place in the compeitition to the Chasov-Yar Combine; second place to the Zaporozh Plant; third place to the Belokamen Plant.On the basis of material on the technology for the manufacture of ladle bricks used in the plants taking part in the competition, and also the service factors of the products during competitive testing, and on the basis of proposals from the All-Union, Ukraine and Vostok Institutes of Refractories for improving the quality of ladle brick, the award panel of the competition made the following recommendations for further improving the quality of ladle bricks:scientific-research institutes for refractories in collaboration with factory producers should carry out tests of fired ladle bricks made from chamotte and semiacid bodies, kaolinized and high-alumina raw materials and unfired products, and also should test linings made from rammed bodies in ladles of different capacities in different conditions of service;concerns should specialize in the manufacture of ladle bricks and install modern grinding, blending and pressing equipment;the assortment of bricks should be reexamined and the sizes of ladle bricks should be increased with the aim of reducing the number of joints in the structure;output of adequate supplies of high-grade special packaged mortars should be ensured.     

Experience with producing ladle and blast furnace brick with a change in pressing rates

Conclusions A reduction in the pressing rate improves the factors of ladle and blast furnace refractories, since it affords the possibility of increasing the permissible upper limit for the pressing force, starting from the condition that there are no overpressing cracks.In order to obtain refractories with a low porosity it is desirable to prepare ladle and blast furnace brick with 5.0–5.5 pressings per minute with an average pressing rate of 9–11 mm/sec.Translated from Ogneupory, No.5, pp. 20–22, May, 1970.     

铝镁尖晶石炭砖在盛钢桶上的应用

以铝镁尖晶石炭砖取代铝镁不烧砖在首钢第三炼钢厂９０ｔ盛钢桶上应用时效果良好．其侵蚀速率低，工作面反应层与变质层很薄，有较好的抗热震性能，尤其对抵抗碱性熔渣的侵蚀和渗透明显优于铝镁不烧砖。试验结果表明铝镁尖晶石炭砖的使用寿命比原用铝镁不烧砖提高一倍以上。