SU623090A2

SU623090A2 - Rotary furnace lining

Info

Publication number: SU623090A2
Application number: SU762402177A
Authority: SU
Inventors: Леонид Иосифович Финкельштейн; Юрий Анатольевич Ушаков; Николай Григорьевич Срибнер; Юрий Гаврилович Гайдамакин; Виктор Яковлевич Островлянчик; Лев Моисеевич Лубенский; Виктор Алексеевич Екимов; Владимир Владиславович Красавин
Original assignee: Предприятие П/Я А-7896
Priority date: 1976-09-01
Filing date: 1976-09-01
Publication date: 1978-09-05

Description

Иаобретенне относитс к метаплургий, в частности к процессам обжига во врашающихс печах и может быть использоваио прн производстве глинозема способом спекани .The invention concerns metaplurgies, in particular, roasting processes in incinerating kilns and can be used in the production of alumina by sintering.

По основному авт. св. № 5О8645 известна футеровка вращающейс печн, содержаща чередующиес по окружности нейтральные и кислые ог неупоры в соотношении 1:0,. Причем соотношение огнеупоров посто нно по длине зоны спекани , кислые огнеупоры выступают над поверхностью нейтральных.According to the main author. St. No. 586,645, the lining of a rotary kiln is known, containing neutral and acidic non-shells alternating around the circumference in a ratio of 1: 0. Moreover, the ratio of refractories is constant along the length of the sintering zone, acid refractories protrude above the neutral surface.

Недостаток -известной футеровки состоит в том, что в процессе спекани глиноэемсодержащвх щихт при посто нном по длине зоны спекани соотношени нейтрапных и кислых огнеупоров образуетс неравномерный по длине зоны спекани слой обмазки, что снижает арок службы футеровки.The disadvantage of the well-known lining is that during sintering, the clay and bricks with a constant ratio of neutral and acid refractories along the sintering zone form a layer of coating that is uneven along the length of the sintering zone, which reduces the lining service arches.

Цепь изобретени - увеличение срока службы, футеровки за счет создани равномерного сло обмазки по длине зоны спекани .The chain of the invention is an increase in the service life of the lining by creating a uniform layer of coating along the length of the sintering zone.

Поставленна цель достигаетс тем, что предлагаема футеровка в зоне спекани Выполнена с уменьшением, от загрузочного к разгрузочному концу соотношением нейтральных и кислых огнеупоров.The goal is achieved by the fact that the proposed lining in the sintering zone is performed with a decrease, from the loading to the unloading end by the ratio of neutral and acid refractories.

Футеровка выполнена на внутренней поверхности корпуса .чередующимис по окружности р дами кислого н нейтрального огнеупора в виде отдельных панепей . В каждой последующей панели от загрузочного к разгрузочному концу зоны спекани (по ходу материала) уменьшаетс соотношение нейтралы1ых и кислых огнеупоров .The lining is made on the inner surface of the casing, alternating around the circumference by rows of acidic and neutral refractory materials in the form of separate panels. In each subsequent panel, from the feed to the discharge end of the sintering zone (along the material), the ratio of neutral and acid refractories decreases.

Claims

On acidic refractories, protective coating is poorly formed and held, and on Neutral materials, coating is formed intensively. The increased ratio of neutral and acid refractories in the cold end of the sintering zone ensures the creation and retention of a layer of plaster with a height of 200-400 mm. A decrease in the ratio of neutral and acid refractories in the hot konpa sintering zone prevents the formation of an excessive layer of coating. PRI me R 1, At a length of 30 m, lining was sintered with three panels of alternating neutral (magnetically MHC and acidic bricks, fireclay bricks IM-3) on fire barriers in the first panel at the loading end of the zone through each row of fireclay located two rows of magnesia brick (, 5, in the second panel every two rows of fireclay located two rows of magnesia brick (n: 1: 1) in the third panel every three rows of wide range one row of MarHe bricks (n: to 1: 3). The thickness of the resulting plaster over the whole ine portion ZOO mm. EXAMPLE EXAMPLE

2. The lining of the sintering zone is made of two panels. In the first panel at the boot end of the zone every three rows of chamotte J5ac- O there are three rows of magnesia brick (n: for century: 0.7); in the second panel, every two rows of chamotte brick there are two rows of magnesia brick ( n: k. l: l). The coating thickness is 250 and 35 mm, respectively. Neutral refractories can protrude above the surface of acid refractories, which contributes to the rapid formation of the protective furnace during the start-up period. a layer of plaster to prevent spalling of the sour refractory during this period. Claims. Lining the rotary kiln on ayt. St. No. 508645, characterized in that, in order to increase the service life of the lining by creating a uniform layer of plaster along the length of the sintering zone, the lining in the sintering zone is reduced With a decrease from the loading to the discharge end of the neutral and acid refractories.