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the influencing factor on grinding fineness of ball mill

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Feeding size:≤25mm

Applied material:cement, silicate, new-type building material, refractory material, fertilizer, ore dressing of ferrous metal and non-ferrous metal, glass ceramics, etc.

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ball mill: is the grinding fineness the finer, the better

In actual production, some concentration plants think that the finer the grinding fineness, the easier it is to improve dressing efficiency. However, this cognition has led to a lot of winding courses in the processing plant, which not only greatly reduces mineral recovery rate, but also increase investment and operating expenses of the concentrator in vain

According to the research and practice, the factors affecting the grinding fitness are: raw ore hardness, crushing particle size, grid sieve hole, ball mill model, steel balls number, steel ball size ratio, ball mill liner wear, ball mill speed, extension speed, the height of the extension spindle, the wear of the extension blade, the height of the opening under the extension, the size of the opening under the extension, the height of the opening on the extension, the size of the opening on the extension, the size of the water at the returning sand, the water supply of the ball mill, and the flushing capacity at the discharge port of ball mill. Only adjusting these influencing factors accurately can the grinding fitness be controlled in a suitable range

In fact, the characteristics of ore will greatly affect the grinding fitness, each ore has its unique grindability and selectivity. If the grinding particle is too coarse, the metal minerals can't be sufficiently separated from the gangue or harmful elements, resulting in low concentrate grade and recovery rate. However, if the grinding particle is too fine, although the metal minerals are sufficiently separated from the gangue or harmful elements, it will also cause more fine ore particles that are difficult to separate. At this time, the phenomenon of over-grinding is likely to occur. In this case, many useful metal minerals will loss with water in vain, which not only reduces the concentrate grade and recovery rate, but also increase greatly ball mill's consumption caused by an ineffective and unnecessary grinding operation, thus increasing mineral processing cost and finally affecting the economic indicators of mineral processing. Therefore, it's necessary to determine the grinding fitness according to the type of ore

ball mill: is the grinding fineness the finer, the better

After extensive trials and project practice, Xinhai Mining's technology experts found that even if the grinding fitness is finest, the recovery rate is not necessarily the highest. Therefore, the traditional concept, “the finer the grinding fineness, the better”, is completely wrong. In terms of grinding fineness, Xinhai Mining's technology experts also pointed out that grinding fineness is usually determined by the beneficiation test to determine an optimal grinding size range. Generally, the grinding product of the ball mill is mainly measured by screening. The more the percentage under the screening, the finer the grinding. Therefore, neither too coarse nor too fine grinding fitness is advisable. Only an appropriate grinding fineness is the necessary beneficiation condition for separating useful metal minerals from gangue or harmful elements

Taking the Dandong Linjia Sandaogou Gold Mine as an example, the ore has a finer mineral dissemination particle size, which is a typical arsenic-containing, sulfur-containing, fine-grained refractory gold ore. Therefore, a reasonable grinding fineness defined before flotation operation is a key factor to improve the mineral recovery rate. Through the analysis of the relationship between the grinding fineness of the Sandaogou gold mine and the mineral dressing index, as well as mathematical analysis of the grinding fineness inspection test and the existing production data, it is finally determined that when the grinding fineness is -200 mesh and accounts for 92% or more, the optimum economic and technical indicators of mineral processing can be achieved. This conclusion has been applied in the production practice of the factory, and verified by industrial production. The above theory and practice fully demonstrate the importance of proper grinding fineness. It's also very important to choose a ball mill to achieve proper grinding fineness

soft sensor for online cement fineness predicting in ball

In the entire beneficiation process of a concentrator, grinding operation cost accounts for a considerable proportion.  The grinding fitness is one of the main factors affecting the mineral processing index,which will directly affect both the grade of concentrate and the recovery rate of product. Therefore, how to improve grinding fineness of the ball mill becomes an important part of controlling grinding operation cost. 

In actual production, some concentration plants think that the finer the grinding fineness, the easier it is to improve dressing efficiency. However, this cognition has led to a lot of winding courses in the processing plant, which not only greatly reduces mineral recovery rate, but also increase investment and operating expenses of the concentrator in vain

According to the research and practice, the factors affecting the grinding fitness are: raw ore hardness, crushing particle size, grid sieve hole, ball mill model, steel balls number, steel ball size ratio, ball mill liner wear, ball mill speed, extension speed, the height of the extension spindle, the wear of the extension blade, the height of the opening under the extension, the size of the opening under the extension, the height of the opening on the extension, the size of the opening on the extension, the size of the water at the returning sand, the water supply of the ball mill, and the flushing capacity at the discharge port of ball mill. Only adjusting these influencing factors accurately can the grinding fitness be controlled in a suitable range

In fact, the characteristics of ore will greatly affect the grinding fitness, each ore has its unique grindability and selectivity. If the grinding particle is too coarse, the metal minerals can't be sufficiently separated from the gangue or harmful elements, resulting in low concentrate grade and recovery rate. However, if the grinding particle is too fine, although the metal minerals are sufficiently separated from the gangue or harmful elements, it will also cause more fine ore particles that are difficult to separate. At this time, the phenomenon of over-grinding is likely to occur. In this case, many useful metal minerals will loss with water in vain, which not only reduces the concentrate grade and recovery rate, but also increase greatly ball mill's consumption caused by an ineffective and unnecessary grinding operation, thus increasing mineral processing cost and finally affecting the economic indicators of mineral processing. Therefore, it's necessary to determine the grinding fitness according to the type of ore

soft sensor for online cement fineness predicting in ball

After extensive trials and project practice, Xinhai Mining's technology experts found that even if the grinding fitness is finest, the recovery rate is not necessarily the highest. Therefore, the traditional concept, “the finer the grinding fineness, the better”, is completely wrong. In terms of grinding fineness, Xinhai Mining's technology experts also pointed out that grinding fineness is usually determined by the beneficiation test to determine an optimal grinding size range. Generally, the grinding product of the ball mill is mainly measured by screening. The more the percentage under the screening, the finer the grinding. Therefore, neither too coarse nor too fine grinding fitness is advisable. Only an appropriate grinding fineness is the necessary beneficiation condition for separating useful metal minerals from gangue or harmful elements

Taking the Dandong Linjia Sandaogou Gold Mine as an example, the ore has a finer mineral dissemination particle size, which is a typical arsenic-containing, sulfur-containing, fine-grained refractory gold ore. Therefore, a reasonable grinding fineness defined before flotation operation is a key factor to improve the mineral recovery rate. Through the analysis of the relationship between the grinding fineness of the Sandaogou gold mine and the mineral dressing index, as well as mathematical analysis of the grinding fineness inspection test and the existing production data, it is finally determined that when the grinding fineness is -200 mesh and accounts for 92% or more, the optimum economic and technical indicators of mineral processing can be achieved. This conclusion has been applied in the production practice of the factory, and verified by industrial production. The above theory and practice fully demonstrate the importance of proper grinding fineness. It's also very important to choose a ball mill to achieve proper grinding fineness

indicators and influencing factors of grindingand

The preparation stage of a concentrator has a great influence on the indicators of the whole ,mineral processing flow, especially the grinding and classification stage. The effect of this process will directly affect the subsequent operation process. But what are the indicators used to measure this stage? Generally, the effect of grinding and classification stage is measured by grinding fineness of grinding mill, the productivity of grinding mill, the efficiency of grinding and classification stage. In this paper, we will elaborate on these indicators and their influencing factors one by one

Generally, use standard screen (200 mesh) to screen the product fineness and count the percentage of the product in the total. For example, when the grinding fineness -200 mesh accounts for 50% or -0.074mm accounts for 50%, the higher the percentage, the finer the product

For most ores, the finer the grinding, the more enough the dissociation of the useful minerals is, thus increasing the recovery of the useful minerals. Therefore, under certain processing capacity, the grinding fineness will be increased as far as possible. In addition, properly relaxed grinding fineness can reduce energy consumption and improve productivity under the premise of ensuring the mineral processing index

There are many factors that affect the grinding fineness, including the nature of raw ore, the hardness of ore, the size of crushing particle, the size of ore feed, the size of water at the feeding end and the discharging end of grinding machine, the grinding concentration, the filling rate and size ratio of steel balls, the size of the opening of classifier and the size of sand return ratio, and so on. Some minerals are easy to produce mud grinding under the overgrinding, so grinding fineness is not the finer, the better. Generally, the grinding fineness is standard if the majority of useful mineral achieve monomer dissociation

indicators and influencing factors of grindingand

This parameter is usually expressed by the q and refers to the average value of ore processed by the mill by its effective volume per unit under the unit time, ton/(cubic meter · hour), which is one of the important indexes to measure the work of the grinding mill. In the case that the size of ore feeding and product particle are similar, this indicator can be used to judge the ore properties and operating conditions. The production capacity of the grinding mill can be improved effectively by increasing the capacity per unit

The influencing factors of these two parameters mainly include the feeding nature into the grinding mill, the particle size requirements of the product, the type and model of the grinding mill, the speed of the grinding mill, the grinding medium, the filling rate of steel ball and so on. To increase the output of the grinding machine, we can reduce the grain size of the grinding machine and remove the surrounding rock and rock in advance. That is to improve the quality of the ore, which can improve the grindability of the ore, increase the grinding amount, and reduce the energy consumption while increasing the output of the grinding machine

indicators andinfluencing factorsofgrindingand

The preparation stage of a concentrator has a great influence on the indicators of the whole ,mineral processing flow, especially the grinding and classification stage. The effect of this process will directly affect the subsequent operation process. But what are the indicators used to measure this stage? Generally, the effect of grinding and classification stage is measured by grinding fineness of grinding mill, the productivity of grinding mill, the efficiency of grinding and classification stage. In this paper, we will elaborate on these indicators and their influencing factors one by one

Generally, use standard screen (200 mesh) to screen the product fineness and count the percentage of the product in the total. For example, when the grinding fineness -200 mesh accounts for 50% or -0.074mm accounts for 50%, the higher the percentage, the finer the product

For most ores, the finer the grinding, the more enough the dissociation of the useful minerals is, thus increasing the recovery of the useful minerals. Therefore, under certain processing capacity, the grinding fineness will be increased as far as possible. In addition, properly relaxed grinding fineness can reduce energy consumption and improve productivity under the premise of ensuring the mineral processing index

There are many factors that affect the grinding fineness, including the nature of raw ore, the hardness of ore, the size of crushing particle, the size of ore feed, the size of water at the feeding end and the discharging end of grinding machine, the grinding concentration, the filling rate and size ratio of steel balls, the size of the opening of classifier and the size of sand return ratio, and so on. Some minerals are easy to produce mud grinding under the overgrinding, so grinding fineness is not the finer, the better. Generally, the grinding fineness is standard if the majority of useful mineral achieve monomer dissociation

indicators andinfluencing factorsofgrindingand

This parameter is usually expressed by the q and refers to the average value of ore processed by the mill by its effective volume per unit under the unit time, ton/(cubic meter · hour), which is one of the important indexes to measure the work of the grinding mill. In the case that the size of ore feeding and product particle are similar, this indicator can be used to judge the ore properties and operating conditions. The production capacity of the grinding mill can be improved effectively by increasing the capacity per unit

The influencing factors of these two parameters mainly include the feeding nature into the grinding mill, the particle size requirements of the product, the type and model of the grinding mill, the speed of the grinding mill, the grinding medium, the filling rate of steel ball and so on. To increase the output of the grinding machine, we can reduce the grain size of the grinding machine and remove the surrounding rock and rock in advance. That is to improve the quality of the ore, which can improve the grindability of the ore, increase the grinding amount, and reduce the energy consumption while increasing the output of the grinding machine

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