INVESTIGATION OF SOME ASPECTS OF THERMAL AND GAS DYNAMIC CONDITIONS OF THE SINTERING PROCESS AT EGYPTIAN IRON & STEEL COMPANY

الموضوعات

علوم بحتة وطبيعية

العلوم الاجتماعية › العلوم الاقتصادية › الانتاج › الصناعة · العلوم التطبيقية والتكنولوجيا › الهندسة الكيميائية › التعدين › الحديد الصلب

الملخص

Sintering of iron ores is the most wide spread process of ores agglomeration , this process is voerned by the laws of heat transfer as well as the principles of chemical and physico - chemical reactions . The Egyptian iron & Steel company is the biggest iron & steel - works in A. R. E . with a designed annual productivity 1.5 min tons of steel . The plant is an integrated one with 2 sintering shops . Each shop comprises 4 sinntering machines with a working area of 50 and 75 m2 shops No. 1 and No.2 respectively . The investigation of the existing situation of the sintering shop No. 2 shows that its parameters is still below the rated one . the aim of this work is to improve the quality and increase the productivity of the sintering shop No. 2 . The thesis contains 4 chapters in addition to introduction and references . Chapter I deals with the literature survey involving the theory and technology of the sintering process . Chapter II is devoted to the analysis of the existing situation of the sintering shop No.2 and the investigation of the working parameters of the shops for the last 2 years and 8 months . The charge materials of raw mix layer consist of iron ore , limestone , coke breeze flow dust . return sinter and moisture are added to the charge components . The iron ore is supplied from Baharia oasis mines and it has the disadvantage that it contains alkali halides . the chlorine content is rather high and fluctuates from 0.511 5 in 1978 to 0.492 % for the first eight months of the year 1980 . such high chlorine content , which is several times more than that considered by the detailed project report , leads to excessive wear of the grate of the machine . Moreover the investigation of the average chemical composition of the ready - made sinter showed that the alkali input is rather high and has a detrimental effect on the operation of the blast furnaces as it increases scaffolding inside the furnaces and decreases its productivity . it was revealed that the idle time is very high ranging from 37.65 to 30.3 % against 10 % planned one . it was also noted that the percent of return sinter is high and is associated with the increase of the percent of the coke breeze fraction + 3mm. Chapter III considers the coke reactivity . from literature findings it is well known that one of the possible methods to improve the fuel reactivity is to change the size of its particles . So the effect of coke size and its grarulometeric composition on coke reactivity was discussed . Experiments were carried out using the weight loss method for determination of coke reactivity and its rate of combustion . it was found that increasing the content of the smaller fraction ( 0.5 - 3 mm ) from 30 to 90 % in coke mixture increases the reactivity of the mixture and its combustion rate . Chapter IV deals with the thermal and gas dynamic conditions of the process . in this respect the effect of such factors as coke fraction , air suction , bed height and coke rate , on waste gas temperature , per - meability , air consumption , gas dynamic resistance coefficient , productivity and the quality of the produced sinter were studied . Semi - industrial installation was applied to study the effect of these factors . Experimental results show the following : the increase of the percent of fine coke ( -3 mm) from 30% to 90 % decreases markedly the percent of small size fraction sinter and increases the specific productivity . moreover the FeO content in the sinter increases and the drum test decreases . The increase of air suction increases the specific productivity while the effect of the bed height of the raw mix layer on the specific productivity and drum test value is rather fluctuating within small limits . increasing coke rate from 4.5 % to 8.5 leads to the increase of the productivity and the strength of the produced sinter . Waste gas temperature increases with the increase of coke fraction , coke rate and air suction . Permeability of the raw mix layer decreases with the increase of coke fraction and coke rat e. Gas dynamic resistance coefficient increases with the increase of coke fraction . Air consumption is decreased with the increase of coke fraction , coke rate and bed height while it increases with the increase of air suction . using 90 % of coke fraction with size less than 3mm at a rate 8.5 % under air suction 900 mm. w. g. and a bed height 275 mm increases the productivity by at least 70 % and improves the quality of ready made sinter .

روابط وملفات

التعريف والنوع

رقم الوثيقة

10111

رقم المصدر

122068

رمز المصدر

BK00010111-001

رقم العقد

340

نوع الوسائط

AskZad

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

ورقي

أسماء الملفات

11220680001.pdf

بيانات النشر

ترجمة العنوان

دراسة الظروف الحرارية و الديناميكية لعملية التلبيد فى شركة الحديد و الصلب

ألقاب المؤلفين

[{"name_ar":"M.H. Selim","name_en":"M. H. Selim","title_ar":"اشراف","title_en":"Supervision"},{"name_ar":"محمد شريف سالم","name_en":"Muhammad Sherif Salem","title_ar":"مؤلف","title_en":"Author"}]

اللغة

Arabic

المصدر والدورية

اسم المصدر

INVESTIGATION OF SOME ASPECTS OF THERMAL AND GAS DYNAMIC CONDITIONS OF THE SINTERING PROCESS AT EGYPTIAN IRON & STEEL COMPANY

المحتوى والصفحات

عدد الصفحات

114

رقم الجزء

0

أبعاد الوثيقة

22 × 30

الموضوعات الرئيسية

العلوم الاجتماعية › العلوم الاقتصادية › الانتاج › الصناعة · العلوم التطبيقية والتكنولوجيا › الهندسة الكيميائية › التعدين › الحديد الصلب

كلمات مفتاحية

الحديد الصلب · الصناعة

التصنيف العام

متخصص

إشراف وإعداد

الإشراف

M.H. Selim

جدول المحتويات

introduction and oriantation to the problem
 1
 chapter 1:theroetical backfround and relevant literature
 4
 CHAPTER 2: investigation of the condition of the sintering process at E.I.AND S.C
 36
 chapter 3: investigation of coke  reactivity
 46
 chapter 4: investigation of thermal gasdynamic condition of the process
 61
 experimental
 62
 resultts and discussion
 65
 reference
 92

الاقتباسات الببليوغرافية