A new testing procedure for studying crushing phenomena, presently being perfected by Allis-Chalmers, is described for the first time. ... benefit crushed stone producers. ... The pendulum product …
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The objective of this study was to study the pulmonary function test in stone crusher workers. This study was conducted at Stone crusher plant located at Nagaur district (Ajmer region) of Western Rajasthan. Male workers working at site were included in this study, this study was conducted on 100 subjects out of which 50 non-controls and 50 were ...
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Abstract: Stone crushing in India is a small scale industry where a large number of laborers work. Workers at stone crushing site are exposed to silica dust which leads to pulmonary function deterioration. The objective of this study was to study the pulmonary function test in stone crusher workers.
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A cross-sectional type of observational study was conducted at 7 various stone crusher units on 120 male stone crushers and 120 healthy male controls. Values of FEF25 …
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The primary crusher is the first stage in the crushing process, while the secondary crusher is the second stage. Function and Operation: The function of the primary crusher is to break down the larger rocks and stones into manageable sizes, while the function of the secondary crusher is to further refine these sizes into the desired …
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A cluster of 50 stone Crushing units located at Pammal, in Suburban Chennai, the capital of Tamil Nadu State, India, is a Source of high levels of dust generation in the vicinity of the crushers ...
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Construction: They are heavily involved in the production of high-quality aggregates used in the construction of concrete, roadways, and other infrastructure projects.They are employed in the crushing of hard rocks, such as quartzite, granite, and basalt, into various sized gravel, crushed stone, and sand particles.
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Workers at stone crushing site are exposed to silica dust which leads to pulmonary function deterioration. The objective of this study was to study the pulmonary function test in stone crusher ...
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Comparing pulmonary functions of stone crushing workers with those of nonexposed agricultural workers in West Bengal, India found a higher prevalence of restrictive impairment among the exposed group and aHigher prevalence of obstructive impairment in the nonexposed group. ObjectivesThe aim of this study is to examine the …
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Objectives: The aim of this study is to examine the effects of stone crushing in West Bengal, India, by comparing pulmonary functions of stone crushing workers with those of nonexposed agricultural workers. Methods: Two hundred seventy two stone crushing workers and 123 nonexposed workers were analyzed in terms of occupational and …
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Pulmonary function tests were recorded in 120 male stone crusher workers. Intergroup statistical analysis amongst the workers depending on duration of exposure was carried out by Analysis
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Cone crushers can form finished products down to 12mm or less. Like the jaw crusher, the cone crusher provides a relatively low cost crushing solution, but there are application drawbacks that may make another crushing solution more appealing. First, cone crushers cannot accept all material sizes.
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In 1883 Mr. Blake challenged Mr. Gates to crush 9 cubic yards of stone in a contest to see which crusher would finish the job faster. The Gates crusher completed the task 40 minutes sooner! The Gates' gyratory crushers were preferred by the mining industry for almost two decades until the turn of the century, circa 1910, when Blake's jaw ...
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The Spiro metric pulmonary function tests (PFT) were studied in stone crusher workers (n = 120) and normal healthy controls (n =120) from the Karad taluka Western region in …
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Methods. Two hundred seventy two stone crushing workers and 123 nonexposed workers were analyzed in terms of occupational and personal histories, radiological findings, and pulmonary function test (PFT) results including slow vital capacity (FVC), forced vital capacity (FVC) and peak expiratory flow rate (PEFR).
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The steel surface of a crusher against which material is crushed by impact or pressure. Bridging Blocking of a crusher opening by large pieces of material. Burbank Abrasion Test A standard testing method for comparing the relative abrasiveness of …
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Stone crushers of Marathwada region of Maharashtra exposed to silica dust were prone to develop lung disorders as indicated by reduced value of FEF25-75% and PEFR. A cross-sectional type of observational study was conducted at 7 various stone crusher units on 120 male stone crushers and 120 healthy male controls. Values of FEF25-27% and …
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It can be concluded from this study that even low dust level exposure for longer duration can result in lung and lung function involvement, and stone quarry workers, because of their occupational exposure to silica dust, are at increased risk of lung and Lung function involvement. 3Summary: The workers employed in stone quarries, which is an …
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Two hundred seventy two stone crushing workers and 123 nonexposed workers were analyzed in terms of occupational and personal histories, radiological findings, and pulmonary function test (PFT ...
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They play a critical role in the process of crushing stones. From building highways, railroads, and buildings to creating cement, stone crushers are indispensable. Their capacity to turn massive stones into granules or fine particles is why they're so widely used in the construction and mining industries. Different types of stone crushers
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Table Source: Wikipedia (Crushers) Cone crushers use a spinning cone that gyrates in the bowl in an eccentric motion to crush the rock between the cone surface, referred to as the mantle, and the crusher bowl liner.Gyratory crushers are very similar to cone crushers, but have a steeper cone slope and a concave bowl surface. As the gap …
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PEFR was significantly reduced in stone crushers as compared to controls. Also as the duration of exposure increases the values of flow rates goes on decreasing among …
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Results: We observed a significant reduction in lung function in subjects having duration of exposure above 10 years (Group III) with respect of stone crushers …
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Methods: A cross-sectional study was carried out in stone crusher workers. Pulmonary function test were recorded on 50 subjects. Statistical analysis amongst the stone crusher workers was carried out by Analysis of Variance (ANNOVA) test. ... Keywords: Pulmonary function test, Stone crusher workers, Silica, Duration of exposure, …
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The pulmonary function test parameters among the quarry workers were assessed in the various occupational categories. Results: PFT of quarry workers was significantly reduced as compared to that ...
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Pre‐employment and periodic clinical examination, chest radiography, and pulmonary function tests of the stone‐cutting workers should be done. Application of ergonomics should be applied to improve the workplace environment. ... An investigation into respiratory health problems of workers at stone crushing industries in Bangladesh. …
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Learn everything you need to know about primary crushing, secondary crushing, and tertiary crushing in this comprehensive guide. Discover the types of crushers used in each stage, their working …
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adu. Objectives: This study aims to assess pulmonary function and determine the associated risk factors among quarry workers. Materials and Methods: A comparative, cross-sectional study was conducted from April 2014 to January 2015 among workers at seven stone quarries in Chennai and residents within a 5 Km radius. Pulmonary …
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Compression strength test of stone is determined in this type of test. Procedure: The sample taken for the test should be a cube of size 40mm×40mm×40mm or 50mm×50mm×50mm. The sides of the cubes are made smooth by dressing and polishing.
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The Spiro metric pulmonary function tests (PFT) were studied in stone crusher workers (n = 120) and normal healthy controls (n =120) from the Karad taluka …
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