Broken particle size is an important economic indicators and technical performance indicators extrusion class crusher , crusher product size a direct impact on the economic benefits of the users of crusher , crushing manufacturers , thereby affecting the reflects the crusher performance of the pros and cons of the economic benefits. Major mining bulky rock crushing operations , want as much as possible to improve the crushed product was cubic meters of fine-grained the broken mass fraction , into the ground in order to reduce the particle size , the implementation of " more crushing and less grinding " and " broken instead of grinding " lay the foundation for processing operations crusher and mill operations thus saving energy consumption, improve the economic efficiency of the concentrator . In addition, in the construction and building materials industry , not only want more fine particles mass fraction of the crushed product obtained by crushing operation , but also want to minimize the flakiness broken products , improve the crushed product was cubic mass fraction , thereby enhancing the concrete the aggregate product quality , thereby increasing the strength and rigidity of the building . Therefore, the broken product size is a very theoretical and practical significance . A wide range of extrusion class crusher , the common extrusion crusher jaw crusher , cone crusher and roll crusher in metallurgy, mining and other fields . However , traditional extrusion crusher single particle crushing principle for its design guidelines , conservative design of the machine is bulky and inconvenient operation , inefficient , high energy consumption , especially crusher product size , multi flakiness , serious impact on the economic benefits of the user departments . Therefore , in order to improve the Chinese extrusion crusher performance, improve the granularity of the crushed product , in-depth study based on laminated crushing principle , the extruded class crusher crusher product size distribution for independent research and development of new, efficient, energy-saving and environmentally friendly modern high-energy the extruded class crusher lay the foundation . 1. The extruded class crusher process operating model 1.1Extrusion class crusher cavity shaped stratified analysis According to the bulk materials and extrusion crusher kinematics and dynamics , based on existing research results , these types of crushing chamber hierarchical division of research . Based on the principle of a fixed mass and layered crushing principle , the granular material from the crusher feed opening into the crushing chamber , after crushing the mobile jaw with fixed jaw several times layered extrusion crusher discharge opening discharge crushing chamber , broken layer dispersion materials equivalent throughput equal. Squeeze class crusher hierarchical division of the crusher cavity shape and broken particle size distribution of convenience. 1.2 Based on general equilibrium models extrusion class crusher crushing process General equilibrium models , also known as broken mass conservation model is broken by the grain size particles total mass equal to the total mass of broken before these bulk materials , bulk materials before and after the crushing quality must be conserved , and regardless of granularity happen to . In addition , Epstein think , crushing process is constituted by a series of crushing event , every broken events feed are on a broken discharge events , each crushing event can be used to select functions and crushing function described LYNCH based on the overall balance model and Epstein 's research results, the introduction of a classification function , use the select function , crushing and grading functions constitute the matrix model to describe each crushing event a success . Therefore, based on the LYNCH research and crusher crushing Stratification take any broken layered bulk materials in the crushing chamber hierarchical from extruded class crusher feed opening into the crushing chamber crushing layer and laminated crushing after K broken bulk materials discharge of the crushing chamber . 2. The laminated crushing process test Numerical simulation analysis of the particle size of the crushed product to take advantage of the extrusion class crusher operating model must be broken layer crushing chamber function ink model and fragmentation functions best model in depth. Used in this article domestic RMTl50B rock mechanical testing machine a pilot study on bulk materials laminated crushing process , the establishment of various crushing layer to select the model of relationship between the operating parameters and structural parameters of function and fragmentation function crusher , crushing squeeze class crusher product size simulation optimization laid the foundation. 2.1 Test principle Filled with loose gravel crushing instrument bulk materials, laminated crushing granular material before the test height h, gravel crushing pressure F is applied to the lever feed the rock bulk materials in the amount of compression s stone crushing instrumentlaminated broken laminated broken broken sieve analysis to obtain a series of broken product particle size distribution of the test data, the test data, mathematical and statistical regression analysis, the establishment of laminated crushing process select functions and crushing function and feed compressionthan s / JL and particle size distribution coefficient of the relational model. Particle size distribution coefficient is a description of bulk materials in the pre-laminated crushing particle size distribution uniformity impact index selection function. Therefore, the laminated crushing test to consider fine-grained bulk materials broken broken protective effect of coarse-grained bulk materials. Cone crusher for the study, discussed in detail the principle of the extrusion crusher based on laminated crushing principle laminated crushing process test. Crushing wall and rolling acetabular wall cone crusher crushing chamber crushing layered bulk materials laminated crushing process can be seen as a crushing wall and rolling acetabular wall rock bulk materials in a cylindrical container laminate breaking process, so can take advantage of the rock gravel crushing instrument bulk materials the laminated crushing test to simulate extrusion class crusher cavity crushing of rock the laminated crushing process bulk materials. Moreover, the crushing chamber crushing each layer into to the size of the amount of compression is determined by the crusher and structural parameters, so create a relational model selection function and crushing function can be further operating parameters and structural parameters of the selection function and crushing function and crusher the relational model, which laid the foundation work and structural parameters of the relationship between depth performance crusher cone crusher. , The establishment of the broken layer of the cone crusher crushing chamber selection function and fragmentation function model, is the need to establish selection function and the function of crushing crushing chamber crushing layer before the initial feed amount of compression volume, bulk materials before crushing a high degree of ghosts, broken particle size and bulk materials before crushing 2.2 Select the function and fragmentation function test Select function model is a function of the crushing cavity each breaking layer feed amount of compression and the corresponding bulk materials particle size distribution coefficient. When bulk materials laminated crushing process the powder crushing proportion of products, powdery bulk materials form a protective coarse-grained bulk materials in the crushing work, we must fully consider the impact of the particle size distribution coefficient selection function. The crushing function is described in the cone crusher crushing each layer of granular material laminated crushing the mathematical model of the product particle size distribution is a function of the compression ratio feed. Test as the research object limestone(1) Take the appropriate limestone bulk materials into the gravel crushing instrument, the bulk materials within a stones crushed compacted, neat gravel crushing instrument bulk materials with a pressure column as flat as possible, so that the top surface of bulk materials. (2) is equipped with a limestone gravel crushing bulk materials instrument on the RMT. 150B rock mechanics test system, ready to be laminated crushing test. (3) by the RMT. 150B rock mechanics test system microcomputer control system according to queeze in to the compression ratio test for the amount of compression of the granular material within a stones crushed laminated crushing test. (4) the use of new gravel standard sieve and said electronic screening analysis, the laminated crushing bulk materials to get the laminated crushing undersize particle size distribution data and the corresponding graph. (5) after the screening bulk materials mixed evenly and replace the gravel crushing instrument, solid bulk materials and its height to the height of the last squeeze the end of the broken. 6) changing the feed to the compression step (5) in the bulk materials are laminated crushing test, the recorded test data and sieve analysis of crushed product. (7) Repeat the test procedure (1) to (6) several times (8) of the above test data for statistical regression analysis to obtain a the laminated crushing process to select the function model and crushing function model. 2.3 Test data statistical regression analysis Statistical regression analysis of the test data obtained, considering the particle size distribution coefficient of the laminated crushing of the selection process, the selection function can create models and crushing function model. The uneven distribution of various size, particle size distribution coefficient values, the corresponding function decreases. Conversely, when each grain size distribution tends to uniform particle size distribution coefficient the Ding value smaller, the corresponding selection function larger. Accordingly, the coefficient of particle size distribution can effectively describe the non-uniform particle size distribution brought about by the impact of the selection function. 1 conclusion (1) The broken matrix model, general equilibrium models, and squeeze crusher cavity-based hierarchical division of research, the establishment of the extrusion class crusher the laminated crushing process operating model, to provide a method for the effective control of the crushed product quality. (2)Using the RMT. 150B rock mechanics test system test simulates the extrusion class crusher laminated crushing process, in-depth study of the laminated crushing process, the establishment of the extrusion class crusher laminated crushing process to select the function model and broken function model for the broken product the particle size distribution of simulation and optimization laid the foundation. (3)Establish extrusion class crusher broken laminated particle size optimization model for the research and development of new, highly efficient, energy-saving and environmentally friendly modern energy-extrusion class crusher laid the foundation. (4)To the domestic PYB900 cone crusher for example, the broken particle size analysis of simulation and optimization, optimization results are applied to a large crusher manufacturers to improve the design of traditional PYB900 cone crusher developed a physical prototype, physical prototype to test the feasibility and reliability of the model.