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ball mill vs vertical mill in white cement production

vrm vs ball mill for cement grinding - page 1 of 1

vrm vs ball mill for cement grinding - page 1 of 1

Good Days! Gentlemen, Anybody in this forum who have had some practical/extensive experience on Vertical Roller Mill being used for cement grinding? We are planning to put up a new cement grinding plant using Vertical Roller Mill(300-350 TPH) and before implementing the project, we would like to gather as much information regarding the actual operation of this mill during cement grinding and the quality of the product in terms of the fineness/particle size distribution and how does it compare with the product of a ball mill relative to these parameters. Other parameters(VRM vs. Ball Mill) to be considered are the following: Specific power consumption Maintenance costs Process control/process technology Plant/system auxiliaries Reliability & Product quality It will be highly appreciated if we will receive immediate feedbacks from the knowledgeable members of this forum regarding this topic as this will help us to move forward with the implementation of this project. my e-mail: [email protected] Best regards, Abdullah Bazarah

Anybody in this forum who have had some practical/extensive experience on Vertical Roller Mill being used for cement grinding? We are planning to put up a new cement grinding plant using Vertical Roller Mill(300-350 TPH) and before implementing the project, we would like to gather as much information regarding the actual operation of this mill during cement grinding and the quality of the product in terms of the fineness/particle size distribution and how does it compare with the product of a ball mill relative to these parameters.

It will be highly appreciated if we will receive immediate feedbacks from the knowledgeable members of this forum regarding this topic as this will help us to move forward with the implementation of this project.

Specific power consumption- high for ball mill and Low for VRM Maintenance costs- high for VRM and low for Ball mill Process control/process technology- ball is operation friendlt and simple in operation but VRM requires some PID or control technology. Plant/system auxiliaries- less auxillaries in ball mill and hydraulic circuit to be maintained for VRM . Reliability & Product quality- good partcicle size distribution in ball mill as we can play wtth Grinding media filling. VRM has less flexibility in controlling particle size distribution. Overall ball miil is good option for Cement mill but only has limitations for higher capacity, as two ball mill to be installed for One VRM, but in case of breakdown one ball mill can be in operation. Trust this clear your clarifications on equipment selection for cment production. Regards SRP...

Overall ball miil is good option for Cement mill but only has limitations for higher capacity, as two ball mill to be installed for One VRM, but in case of breakdown one ball mill can be in operation.

white cement manufacturing process: 6 steps | white cement plant

white cement manufacturing process: 6 steps | white cement plant

In the cement manufacturing process, in order to avoid the mixing of colored impurities, calcination of white cement plant mostly use natural gas or heavy oil as fuel. Reduction slag, gypsum and white granulated slag produced by electric steelmaking can also be used to produce white cement without clinker.

Strength: strength is another typical standard, there some factors to affect the cement strength, such as constituent minerals of clinker, sintering degree, crystalline state, cement fineness, admixture activity, cement particle gradation, etc.

The white cement manufacturing process is similar to the Portland cement manufacturing process, so we introduce the factors that affect cement quality. Just like general cement manufacturing plant, the white cement manufacturing process can be generally divided into six steps:

In the white cement manufacturing process, the kiln firing system is the key to the entire cement production line, which affects the product quality and energy consumption of the entire white cement plant. Therefore, it is important to rationally design the kiln firing system. AGICO CEMENT introduces the design of the rotary kiln firing system on the white cement plant.

Because a small amount of fluorite is added as a mineralizer in the white cement raw material to reduce the firing temperature. Fluctuation or improper control of the blending amount in the cement production can cause the liquid phase to appear in advance in the preheater at all levels of the kiln, especially in the high temperature section and the decomposition furnace, which will cause the material to stick. It is especially serious in the place where a little cold wind leaks in and may occur at any time. This is also a feature that must be paid attention to in white cement manufacturing process.

Therefore, in the design of the preheater at each level (fifth stage) of the kiln tail, more attention must be paid to solving the problems of sealing the kiln end preheater system and preventing the accumulation of materials. The solutions are as follows: all the flanged parts of the preheater air pipe flanges are welded to completely prevent air leakage in this part; All levels of unloading air-locking flap valves are made of high-quality heat-resistant steel to reduce the deformation of the valve body at high temperatures to ensure the effect of air-locking; the connection between the cyclone inlet and the air duct at all levels eliminates horizontal or circular air ducts completely, the air pipe is connected with a large inclination angle (with a horizontal angle of 55 ) to avoid the accumulation of material at this part as much as possible.

The volume should meet the average residence time of the gas in the furnace is equal or more than 5.5s, because the clinker from the kiln is cooled by the water spray, which will cause the temperature of the tertiary air decrease, resulting in a corresponding increase in the fuel combustion time. It is important to ensure that the material entering the kiln has a high carbonate decomposition rate, and reduce the calcination pressure in the cement kiln.

The clinker adopts a combination of water spray quenching and grate cooler. The principle is to promote the reduction of ferric iron in the clinker to divalent iron to increase the whiteness of the clinker.

In actual cement production, the consumption of the water spray is determined by the specific whiteness and intensity control requirements that can meet the quality of the clinker. The design should ensure reasonable configuration and automatic control and operation. This kind of bleaching method can produce all high-quality white cement with a Heinz whiteness of 90 or more and a P W42.5 or more.

Due to spray bleaching, the temperature of the tertiary air will be reduced, in order to compensate and reduce its adverse effects as much as possible. It is necessary to add a layer of 40mm-60mm calcium silicate board in the lining of the tertiary air duct to enhance its thermal insulation effect.

Through the above reasonable design, it is beneficial to reduce the energy consumption on the production line, ensure the production quality of white cement, and produce cement clinker with higher whiteness and strength. AGICO CEMENT has rich experience in cement production line design and supplying cement equipment.

White Portland cement is main kind of white cement. low content of ferric oxide and other non-ferrous metal oxide of limestone, clay, silica are used as the main raw material, after high temperature calcination, quenched into cement clinker, adding suitable amount of gypsum (can also add a small amount of white limestone instead of part of the clinker) into cement grinding mill equipped with stone or wear-resistant metal plate and grinding medium.

Uses: white Portland cement is similar to ordinary Portland cement in physical properties, mainly used as decorative materials for buildings, but also for sculpture crafts. The use of white cement also includes putty powder, coating, caulking agent, binder, waterproof coating, terrazzo, artificial stone, floor tile, permeable brick, washing stone, sculpture, wear-resistant floor, color cement and so on

grinding technology and mill operations | flsmidth

grinding technology and mill operations | flsmidth

This course provides an in-depth understanding of grinding theory and equipment and gives operators the tools to audit your equipment and systems. Improving knowledge of grinding technology and mill operations to operate, optimise and troubleshoot ball mill and vertical roller mill grinding installations. Ball mills and vertical roller mills are used for many grinding applications in cement production: raw meal grinding, coal and pet coke, and finish cement grinding. Improving the competences of the team plays a key role in the optimal utilisation of the grinding installation in your cement plant. The operators and process engineers must be able to evaluate all the process variables in order to optimise the mill system production. The grinding technology and mill operations course provides the necessary knowledge to maximise the production rate and promote operational stability while ensuring the grinding systems operate efficiently.

This course provides an in-depth understanding of grinding theory and equipment and gives operators the tools to audit your equipment and systems. Improving knowledge of grinding technology and mill operations to operate, optimise and troubleshoot ball mill and vertical roller mill grinding installations.

Ball mills and vertical roller mills are used for many grinding applications in cement production: raw meal grinding, coal and pet coke, and finish cement grinding. Improving the competences of the team plays a key role in the optimal utilisation of the grinding installation in your cement plant.

The operators and process engineers must be able to evaluate all the process variables in order to optimise the mill system production. The grinding technology and mill operations course provides the necessary knowledge to maximise the production rate and promote operational stability while ensuring the grinding systems operate efficiently.

FLSmidth provides sustainable productivity to the global mining and cement industries. We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FLSmidth generated revenue of DKK 16.4 billion. MissionZero is our sustainability ambition towards zero emissions in mining and cement by 2030.

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