12 (1. 3004002 300400;)Abstract The serious consequences of the corrosion process in cement plants has become a problem of worldwide significance. Corrosion is caused by acid attack on carbon steel, resulting from the presence of acid producing compounds in raw material, fuels and additives. These compounds typically contain sulfur and chloride. However, weak acids such as carbonic acid can cause slow corrosion over a long period of time. As the baghouses are wide used in cement plant, the corrosion problems are drawing more and more attentions This paper explores the causes and strategies of reducing corrosion problem of new dry process cement kiln baghouse corrosion. Key wordscorrosion of cement kiln baghousescorrosion mechanism acid attackCoatingsCorrosion Resistant Metals0.

1H2OSOx HClNOx2) 1.

CO2H2CO3FeO

SO2H2SO3FeSO3

SO3H2SO4FeSO4

CaCl2HCLFeCl2

Cl2HCLFeCl2

11. 2. 3. 1.1 1. 2. 3. 4. CaCl25. 400~600SO2SO2SO21.2 H2O1. H2O2. H2O

3. H2O

4. H2O

5. H2O

H2O20 1.3 CO2 1.4 4H2O

A: SO3 VerhoffT d=1000/{2.276 - 0.0294ln(PH2O) - 0.0858*ln(PSO3) + 0.0062*ln(PH2O*PSO3)}

B:SO2Kiang:

Td=1000/{3.9526 - 0.1863*ln(PH2O) + 0.000867*ln(PSO2) - 0.00091*ln(PH2O*PSO2)}

C:HClKiangTd=1000/{3.7368 - 0.1591*ln(PH2O) - 0.0326*ln(PHCl) + 0.00269*ln(PH2O*PHCl)}

D:NO2 PerryTd NO2 = 1000/(3.664 - 0.1446*ln(v%H2O/100*760) - 0.0827*ln(vppmNO2/1000000*760) +

0.00756*ln(v%H2O/100*760)*ln(vppmNO2/1000000*760)) - 273

B, C D(P)mm Hg A (P)2. 80~100

3 /

4 /3. 3.1 1. 2. 3.

5

6 3.2 1. 2. 3. 4~64~64. 4.1

7 1. 2. 3. 4. 5. 6. 260250250/()2052051. 2. 3. 4. 5. 4.1.1 E-PTFE1. 2. 4.1.2 4.1.3 1. 2. Walk inWalk in3. 4. 5. 6. a) b) 4.2 1. 2. 3. SO24. CaCl2CaCl2CaCl24.3 1. 2. 3. 4. 4.3.1

21.1

NiFeMnCSiSCoAlTiCrMoWVPNb+Ta

Inconel 62558 min5.0 max0.5 max0.10 max0.5 max0.015 max1.00 max0.4 max0.4 max20-230.015 max3.15-4.15

C-276Bal.1.00 max0.01 max.08 max0.03 max2.50 max14.50-16.5015.00-17.003.00-4.500.35 max0.04 maxC-276Bal.

11%25%

30080%40C-2764.3.2 150

9

9 .225260FlueGard-225SQC3

10 2FlueGard-225SQC

4256001004.3.3 4.3.4 5. 5.1 -1. 2. 5.2 91. 2. 2053.

9 B 5.3 ,1.

2.

3. 4.

5.4 1. 2. 6.

1.

2.

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4.

5. 7.

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1STRATEGIES FOR REDUCING CEMENT KILN BAGHOUSE CORROSION PROBLEMSFor Presentation at the IEEE/PCA Cement Industry Technical ConferenceVancouver, British Columbia May 2001

2Corrosion in Cement Plants caused by Acid Gases By:Andrew Jansen, Mechanical Engineer, Penta Industrial Corp.Linas Mazeika, President & CEO, 3L&T Inc.

3ALTERNATIVE SOLUTIONS FOR CORROSION PROBLEMS IN CEMENT PLANT POLLUTION CONTROL EQUIPMENTBy Mukul Gupta, Managing Director Chemtreat India, Linas Mazeika, President 3L&T Inc. USA4LATEST ADVANCES IN THE UNDERSTANDING OF ACIDDEWPOINT CORROSION:CORROSION AND STRESS CORROSION CRACKING INCOMBUSTION GAS CONDENSATESW.M.M. Huijbregts, R. Leferink Anti-Corrosion Methods and Materials, Vol. 51, 3 (2004), pg 173-188.4