High pressure roller press as pre-grinding to ball mill
High pressure roller press can be introduced as a pre-grinding step for the ball mill, in order to decrease specific power consumption in finish grinding and/or to increase the output of finish mill. Grinding capacity of finish mill increases by about 30%.
Up to 100% capacity increases are reported in India with the use of this approach.
In China this configuration is commonly installed in new plants using dry processes and during grinding system upgrades in existing plants. It can increase grinding output by more than 100%. Hourly outputs of more than 175 tons for grade 32.5 cement and more than 160 tons for grade 42.5 cement are reported. In addition, the technology requires less space (30% less as compared to having two ball mills) and allows for increased use of cement additives. The technology had a penetration rate of 20% in 2010 and this figure is expected to reach 50% during the twelfth five-year development period (MIIT, 2012. p. 25)
| Development Status | Products |
|---|---|
Commercial |
Cement |
High pressure roller press as pre-grinding to ball millCosts & Benefits
| Parent Process: Finish Grinding | |
|---|---|
| Energy Savings Potential | Specific power consumption decreases by about 10%. Reductions in specific energy consumption in the range of 7-24 kWh/t-cement are reported (LBNL, 2008)
.
|
| CO2 Emission Reduction Potential | CO2 emissions can be reduced by 6 - 19 kg/t-cement. |
| Costs | For a 100 ton per hour mill in Japan, the installation costs are reported to be about US $2.7 million (1 US$=¥110), including auxiliary and construction.
|
| Parent Process: | |
|---|---|
| Energy Savings Potential | |
| CO2 Emission Reduction Potential | N/A |
| Costs | |
High pressure roller press as pre-grinding to ball mill Publications
Energy Efficiency and Resource Saving Technologies in Cement Industry
This Cement technologies booklet was compiled by the APP Cement Task Force (CTF) through one of its activities to help its member countries share information on all available energy efficient technologies generally used in the world’s cement industry. The document offers a comprehensive compilation of commercially-available energy efficient technologies used in the cement industry.
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Energy Efficiency Improvement Opportunities for the Cement Industry
The U.S. Environmental Protection Agency’s (EPA) energy guide, Energy Efficiency Improvement and Cost Saving Opportunities for Cement Making, discusses energy efficiency practices and technologies that can be implemented in cement manufacturing plants. This ENERGY STAR guide provides current real world examples of cement plants saving energy and reducing cost and carbon dioxide emissions.
Page Number:
Advanced and Applicable Technology Guide for Energy Saving and Emission Reduction in Building Materials Industry (first batch)
Published jointly by the Chinese Ministry of Industry and Information Technology, Ministry of Science and Technology, and Ministry of Finance, this guide describes information on currently available as well as developing technologies that can help reduce energy consumption and emissions in building materials industries. The guide aims to inform decision makers involved with designing new plants and/or implementing energy efficiency and emission reduction projects in existing plants.