color schemes


Choose Custom color

How to Make Milling More Energy Efficient

step is to grind the clinker in a ball mill equipped with steel balls of varying sizes depending on the type of cement other materials such as granulated blast furnace slag can be added at the grinding stage The mill control can be opti mized based on predicted quality parameters which in turn reduce energy consumption

Cement Process amp Energy Saving

52 58 Blended cement BF slag 1 5 2 3 2 5 3 6 3 8 5 8 20 23 63 65 Portland cement others SO3 Fe2O3 Al2O3 SiO2 CaO Cements 1 439 total Raw Materials kg 1 kg of coal equivalent where HHV of coal is 6 200 kcal kg 99 Electric power kWh 105 Fuel 1 Energy Consumption 4

LOESCHE Mills for cement and granulated blast furnace slag

ZEISEL test has to be used if only a small quantity of a representative sample of material for milling which is insufficient for grinding in the LOESCHE test mill is available Grindability according to Zeisel of clinker and granulated blast furnace slag at 3300 cm2 g Specific power consumption energy requirement according to nbsp

Energy efficient method of portland slag cement grinding

There is a distinction between thermal energy resources which are responsible for the main energy transformation process in the production cycle vis a vis energy for electrical power to run machines for ventilation grinding of raw materials and similar functions Thermal energy consumption normally outweighs that of nbsp

Primary Metal Manufacturing Fact Sheet NYSERDA NY Gov

grinding and heating to homogenize and then process the raw material into a finished product Energy Install engineered refractories to reduce slag formation which decreases heat transfer Replace and The largest energy consumption in iron and steel manufacturing arises from the use of electric arc furnaces which nbsp


enable calculation of grinding energy EXPERIMENTAL RESULTS Results of the grinding trial are shown in Figure 1 Fineness was determined by the air permeability Blaine method and the points shown are the mean of two tests The energy consumed in the laboratory scale ball mill to reach a fineness of 380 m2 g was

Overview of Slag Usage Technology Development at Various Works

Senior Manager Head of Dept Planning amp Coordination Dept Slag amp Cement Div 2 6 1 Marunouchi Chiyoda ku Tokyo 100 8071 1 8 A figure of 1 8 shown at the right side shoulder of an author 39 s name denotes the number of the chapter of his authorship in this report Overview of Slag Usage Technology Development

Improving Thermal and Electric Energy Efficiency at Cement IFC

2 5 2 Replacing a Ball Mill with a Vertical Roller Mill High Pressure Grinding Rolls or Horomill® for Finish Grinding Best Practice LIST OF TABLES Table 1 Specific Thermal Energy Consumption by Rotary Kiln Type such materials as fly ash from power plants blast furnace slag volcanic ash and pozzolans

Separate grindings versus intergrinding SINTEF

17 Jul 2007 the mill During grinding the PSD changes progressively hence results can differ a lot at different finenesses energy grinding is responsible for around 40 of the total energy usage during cement production 21 In the following some specific characteristics of clinker gypsum limestone fly ash slag

Steel slag a supplementary cementious material and basis for

1 Jul 2011 This article introduces a commercialised energy saving cement made by co grinding OPC clinker with steelmaking slag steel slag and blastfurnace slag of blastfurnace slag BFS allowing for great reductions in GHG emissions consumption of natural resources and energy use by between 70 nbsp

Improvement of cement performances through the use of grinding

Due to the stringent requirement of energy saving the use of vertical roller mills for cement grinding is now exploitation of around 30 of the energy supplied this results in a lower energy consumption in terms of describe in details the positive effects of the use of a cement additive during slag cement grinding in VRM

Energy Efficient Technologies in Cement Grinding InTechOpen

5 Oct 2016 In this chapter an introduction of widely applied energy efficient grinding technologies in cement grinding and description of the operating principles of the related equipments and comparisons over each other in terms of grinding efficiency specific energy consumption production capacity and cement nbsp

‎ DOC ‎Methodology China Energy Group Lawrence Berkeley National

Because clinker making accounts for about 90 of the energy consumed in the cement making process reducing the ratio of clinker to final cement by mixing clinker We assumed common Portland cement grinding required similar energy as pure Portland cement that blended slag and fly ash cements were on average nbsp

Cement grinding Vertical roller mills versus ball mills RuCEM RU

It appears from the table that the specific energy consumption of the OK mill system is 25 40 lower than for the ball mill system The benefit of the OK mill is in particular pronounced when grinding to a high fineness and or when slag is included in the cement Grinding aid For ball mills grinding OPC to a fineness of up nbsp

Electricity power conservation in cement production

Grinding Blending Fuel drying Clinker drying slag Applicable energy conservation facilities in process Source JCA Crusher Mill Blender Kiln system Pre heater Vertical Slag Mill Power consumption less than 40 kWh t slag 70 kWh t slag conventional ball mill Dryer excluded Crushing between roller and table

Cement brochure Eskom

19 Apr 2011 As an added benefit reduced energy consumption means reduced environmental impact an important part of the triple bottom line In terms of grinding of raw materials fuels and cement grinding ball mills are now considered to be outdated Ground Granulated Blastfurnace Slag GGBS GGBS is nbsp

Synergic effects of activation routes of ground granulated blast Hal

12 Jul 2016 blast furnace slag GGBS used in the precast industry Martin Cyr Cédric Ground granulated blast furnace slag GGBS is a common cement E and grinding cement E are the energy consumption in kWh t of the cement manufacturing process and the finish grinding of the material respectively

Review of 12th Global Slag Conference 2017

Charlie Zeynel of ZAG International started the conference with a stark statement quot Demand is exceeding supply we are running out of slag roller presses use around 3 5kWh t less compared to a VRM to grind slag to the same fineness or using the same specific energy consumption can grind to a much higher fineness

Energy Efficiency Improvement and Cost Saving Energy Star

and decreased power use for cement grinding by 40 Coppinger 2010 In India a cement plant achieved savings in power consumption of about 15 kWh ton slag cement 3400 Blaine Keyssner and Abraham 2005 Power savings will depend on cement fineness and are estimated at 9 20 kWh t cement In literature nbsp

Energy Use of Fine Grinding in Mineral Processing SpringerLink

18 Dec 2013 Fine grinding to P80 sizes as low as 7 μm is becoming increasingly important as mines treat ores with smaller liberation sizes This grinding is typically done using stirred mills such as the Isamill or Stirred Media Detritor While fine grinding consumes less energy than primary grinding it can still account for nbsp

Cement mill cement ball mill to reduce energy consumption is the key

9 Nov 2015 Grinding system power consumption is an important criterion to judge the level of the merits of the grinding system Currently the grinding technology is to completely free ball vertical mill or roller press finish grinding large scale development of the orientation of the device along with advances in cement nbsp

Ground Granulated Blast Furnace Slag

quot Ground Granulated Blast Furnace Slag quot GGBFS is produced via the process for grinding quot Granulated Blast Furnace Slag quot GBFS that is a kind of byproduct As GGBFS is utilized for such a purpose above compared with ordinary Portland cement GGBFS utilization dispenses with not only the energy consumed to burn nbsp

Pulverization mill Ecofer

Ecofer Pulverization mill After slag processing and steel recovery the valuable metal can be recycled back into the steel mill 39 s manufacturing process Left overs can Main features high efficiency grinding large capacity lower energy consumption unit power consumption is only 1 5 1 8 of jet mill High efficiency grading

Finish Grinding Industrial Efficiency Technology amp Measures

In the finish grinding clinker is mixed with gypsum and other minerals such as blast furnace slag according to the specifications of desired end products and are In China replacement of ball mills with vertical roller mills in finish grinding can reduce energy consumption by 10 to 15 kWh t cement representing a saving nbsp

Innovative solutions for the use of various ARM in ALF CEMIND

A ball mill offers a very well proven and sturdy technology for grinding of slag cements and slag However the ball mill has its limitations as regards drying of the wet mill feed materials and it also has fairly high energy consumption Consequently other types of mills are becoming increasingly common for grinding of these nbsp

Comparing Energy Efficiency in Grinding Mills IsaMill

18 Aug 2008 which are being considered in Australia to meet the growing iron demand of China The high consumption which contaminated the mineral surfaces with iron deposits resulting in poor flotation media such as sand or smelter slag to provide good grinding performance at acceptable energy efficiency

High efficiency grinding of blast furnace slag Industrial Efficiency

Grinding of blast furnace slag is conventionally performed in a tube mill with a dryer which is a power intensive option Energy efficiency of this process can be improved by grinding the blast furnca slag using vertical roller mills VRM or by using a VRM as a pre grinding step for the tube mills

Blast Furnance Slag User Guideline Portland Cement Concrete

The use of GGBFS as a partial Portland cement replacement takes advantage of the energy invested in the slag making process and its corresponding benefits with respect to the enhanced cementitious properties of the slag Grinding slag for cement replacement requires only about 25 percent of the energy needed to nbsp


After grinding to cement fineness GGBS ground granulated blast furnace slag it is used as a main constituent of cement or as a separate concrete addition With the substitution of Portland cement clinker by GGBS in cement or concrete the consumption of natural raw materials as well as energy demands of cement nbsp

Loesche hands over world 39 s largest slag mill – LM 63 3 3 MINING

24 Oct 2014 300 mills of this type have already been sold throughout the world for the production of a wide spectrum of cement and slag types The advantages of cement grinding with a LOESCHE vertical mill lie in the low specific energy consumption and in the option of attaining high throughputs with an individual nbsp

Preparation of Grinding Aid Using Waste Acid Residue from

used mineral admixtures are silica fume fine grinding slag fly ash blast furnace slag and so on In order to improve the activity of these materials they are necessary to be ground to certain fineness The addition of grinding aids is of great significance to improve the activity of raw materials and reduce energy consumption

Comparison of Grinding Characteristics of Converter Steel Slag with

28 Oct 2016 fracture surfaces result in a lower grinding efficiency and higher energy consumption 23–26 In recent years grinding aids most of which are polar organic compounds are extensively applied to weaken agglomeration of fine particles and improve grinding efficiency of cement 27 Therefore the use of

Blast furnace slag granulation ClimateTechWiki

The production of cement clinker from limestone and chalk by heating limestone to temperatures above 950°C is the main energy consuming process Portland cement the most widely used cement type contains 95 cement clinker Large amounts of electricity are used grinding the raw materials and finished cement

Indian Cement Review Magazine Grinding Solutions

Other parameters include power consumption amount of feed moisture i e drying requirement etc On the selection parameters of grinding solutions Bera had this to say When there are materials difficult to grind like slag we would rather prefer a Horomill than a vertical roller mill ball mill or anything else Anything nbsp

Reference report 100th Pfeiffer Mill for India Gebr Pfeiffer

Demand for high efficiency mills has not let up When Shree Shree Cement Kolkata had clear ideas about the Pfeiffer vertical mill it was going to buy A good price performance ratio and low energy consumption The planned grinding plant is capable of producing both OPC and ground granulated blast furnace slag

Energy efficient grinding mill designed for a variety of

Designed for the most energy efficient and reliable grinding of all cement types this roller mill is much more than ok of service allows for continued operation at 60 70 percent of nominal output Simple layout and fewer machines in the mill circuit ensure high run factor and low maintenance costs Optimal wear protection nbsp

ConCrete SikaGrind® SYSteM Sika UK Sika Group

SikaGrind® products added at a low dose are used in the grinding of slag in order to inrease efficiency of the mill and seperator and the quality of the finished product Any increase in mill throughput reduces the specific energy consumption and Co2 emmissions p total energy consumption mill system kw kWh t

multiple ways of energy conservation amp cost reduction in cement

The share of energy consumed in a cement clinker kiln plant is around 60 to 70 of the overall energy to 53 which further impacted the cement grinding output and reduction in specific power consumption 07 mill for grinding wet slag and when they switched back to OPC grinding the mill output got reduced and

Modern Processing Techniques to minimize cost in Cement Industry

The factors that influence the grinding system performance are Material characteristics Moisture in feed materials Energy costs Maintenance Investment Grinding is a highly energy intensive process in the cement industry VRM is now finding acceptance for clinker or slag grinding also due to its energy nbsp

The economic and environmental benefits of increased use of pfa

into capital investment energy requirements and other recurrent expenditure The amenity aspects are mainly concerned with land usage and pollution Before considering these separate approaches however it is worthwhile examining briefly the present pattern of usage of pfa and of blast furnace slag and to consider the nbsp

pre:crushing amp%3bamp screening machinesnext:high quality coal mining vibrating screen