WO 2018/076403 A1

One-dimensional simulation method for predicting quality of clinker in rotary cement kiln

(22) 11.11.2016

(43) 03.05.2018

(57) A one-dimensional simulation method for predicting calcination quality of clinker in a rotary cement kiln, the method comprising: (1) acquiring relevant information concerning a rotary kiln, the clinker calcination quality of which is to be predicted; (2) establishing a one-dimensional mathematical model of the interior of the rotary cement kiln, which comprises a pulverized coal combustion model, a heat transfer model, a material bed movement model and a clinker mineral chemical reaction model; (3) acquiring data of the actual production of the rotary cement kiln as boundary conditions of the mathematical model; (4) calculating and obtaining, according to the one-dimensional mathematical model and the boundary conditions, changes in smoke temperature, material temperature, material bed height, wall temperature, material chemical composition and clinker mineral content in the rotary kiln as the length of the rotary kiln; (5) according to the simulation results in step (4), the predicted clinker quality being contents of f-CaO at a kiln outlet and C3S, C2S, C3A, and C4AF minerals, and optimizing and adjusting, according to the prediction results, the actual production operation.

(71) Zhejiang Bonyear Technology Co., Ltd (CN)

x

Related articles:

Issue 2010-11

Dynamic simulation of alkali, sulphur and chloride circulation in a cement kiln

1 Effect of minor components on the cement burning process Alkalis (mainly sodium and potassium), sulphur and chloride are minor components in the raw materials used for clinker production. Depending...

more
Issue 2022-3 WUHAN UNIVERSITY OF TECHNOLOGY | ANSHAN JIDONG CEMENT CO. LTD

Numerical simulation of oxygen-enriched combustion in a rotary kiln in the primary air and the secondary air respectively

1 Introduction China is a major cement producer and consumer. According to statistics, China produced 2.4 billion?t of cement in 2020 [1]. The cement industry is also the main coal consumption and CO2...

more
Issue 2012-02

Model-based kiln control for green cement production

1 Introduction Today numerical flow simulation (computational fluid dynamics; CFD) is an established tool for calculating combustion processes. The CFD simulation can demonstrate chemical and thermal...

more
Issue 2013-11

Estimation of coating thickness in a rotary kiln by using shell temperature and kiln modeling

1 Introduction Cement is made by grinding gypsum and clinker burned from a mixture of limestone and clay in a certain percentages. A kiln is the most vital part of a cement factory and its outcome is...

more
Issue 2018-6 CHINA BUILDING MATERIALS ACADEMY SOUTHWEST UNIVERSITY OF SCIENCE AND TECHNOLOGY

Numerical simulation of temperature field distribution in the kiln inlet system of a precalcining kiln

Five-level preheater + calciner process

1 Introduction A precalcining kiln is a series of equipment items for producing cement clinkers. The raw material for cement production is a mixture of predetermined proportions of limestone, silica...

more