Introduction of Stone Crushing Plant
Shanghai SBM Machinery offers full set of complete stone crusher plants, and technical service #038; support as well, for instance, complete stone crusher plants item sample, flowing chart, and maintenance.etc.The Complete Stone Crushing Plant consists of vibrating feeder, jaw crusher, impact crusher, vibrating screen, conveyor belts, and electrical control box. The capacity is different, from 50-1000t/h. For various kinds of customers’ needs, cone crusher or dust cleaning system can be a optional, and different models of machines can be fit together to get a best efficiency and capacity.
The complete set of crusher plants is suitable for the crushing job of hard limestone, granite, basalt, river stone, slag , as well as sand making task . It is widely applied in high grade road surface, railway, water conservancy and electricity and building industry.
Processing of Stone Crushing Plant
The raw material (Black stone) from the mines consisting of stones of various sizes from fines to large boulders are unloaded into hopper. The material is fed to the primary crusher via chute. After crushing the material is conveyed to the vibratory screen for screening. The ‘oversize’ from screen goes to secondary crusher via belt conveyor and chute. The crushed material from the secondary crusher goes to the same screen via the same belt conveyor (conveyor used to transfer the primary crushed material). The ‘throughs’ are further screened to separate products. The dust is stored in hopper and directly unloaded into the truck. The products are conveyed out of the screen via conveyor belts to stockpiles. From stockpiles the product is loaded into trucks with the help of loaders and delivered at the point of use.
stone crusher plant & sand making plant
The stone crusher plant & sand making plant produced by our company can provide you with all-around technical support. The whole line consists of vibrating feeder, jaw crusher, cone crusher, impact crusher, Vertical Shaft Impact Crusher,vibrating screen and belt conveyor. According to specific requirements, we can combine different models together to meet various needs.
Brief introduction of the stone crusher plant
The raw materials are first put into elementary-crushing machine for crush, then the belt conveyor transfers the elementary products to the secondary-crushing machine for secondary crush. The secondary products will be separated into two kinds by the vibrating screen. The parts satisfying the standard will be the final products and other parts will return to the secondary-crushing machine.
Stone Crushing Industry is an important industrial sector in the country engaged in producing crushed stone of various sizes depending upon the requirement which acts as raw material for various construction activities such as construction of Roads, Highways, Bridges, Buildings, Canals etc. It is estimated that there are over 12,000 stone crusher units in India. The number is expected to grow further keeping in view the future plans for development of infrastructure of roads, canals and buildings that are required for overall development of the country. In India, the Stone Crushing Industry sector is estimated to have an annual turnover of Rs. 5000 crore (equivalent to over US$ 1 billion) and is therefore an economically important sector. The sector is estimated to be providing direct employment to over 500,000 people engaged in various activities such as mining, crushing plant, transportation of mined stones and crushed products etc. Most of these personnel are from rural and economically backward areas where employment opportunities are limited and therefore it carries greater significance in terms of social importance in rural areas. It is a source of earning for uneducated poor unskilled rural people.
The stone crusher is one such industry that exists in the vicinity of almost all major cities/towns throughout the country in all the states because the construction activities go on throughout the country. As transportation of stone over long distances adds to cost of the crushed stone products, the crushers need to be necessarily located nearer to the demand centers such as Cities, Bridges, Canals etc. Stone Crushers also need electricity supply and large number of man power for its operation. It also needs access roads for the movement of mined stone as well as crushed stone products. It is for these reason that most Stone Crushers are located along the periphery of Cities or in the vicinity of major construction projects. In most cases the Stone Crushers come up in clusters of number of units ranging from five to fifty in one cluster. The crushers are located nearer to the source of raw material such as Stone mines, River Beds etc.
These stone crushers though socio-economically an important sector, gives rise to substantial quantity of fine fugitive dust emissions which create health hazards to the workers as well as surrounding population by way of causing respiratory diseases. The dust also adversely affects visibility, reduces growth of vegetation and hampers aesthetics of the area. In order to prevent/control these emissions, CPCB has already evolved Emission Standards and guidelines in 1989, which has been notified under Environment (Protection) Act, 1986 by Ministry of Environment & Forests vide Notification No. G.S.R. 742(E) dated 30th August 1990 & S.O. 8(E) dated December 31, 1990 based on techno-economic feasibility to achieve the standards. But over the years, as the need for more effective control and enforcement has been felt and to provide more specific guidelines to Comprehensive Industry Document on Stone Crushers the stone crushers to enable them control emissions satisfactorily, CPCB has signed a Memorandum of Undertaking (MoU) with National Productivity Council (NPC) and commissioned the study with the work of reviewing the existing standards, guidelines and sitiing criteria and to evolve a Comprehensive Industry Document (COINDS) for Stone Crushers. This report is an outcome of the indepth studies carried out by NPC jointly with CPCB on a representatives cross section of Stone Crushers throughout the country and a series of meeting held with State Pollution Control Boards, Stone Crushers Associations / Stone Crushers unit representatives etc..
The project was undertaken with following objectives:
• Review of the National Emissions Standards and Guidelines for Pollution Prevention/Control for Stone Crushers
• Evolving improved advanced design
• Development of Siting Criteria
• To prepare a Comprehensive Industry Document for Stone Crushers
Inventorisation of Stone Crushers in Various States
Stone Crushers are primarily small scale industries mostly owned and operated by less educated individuals and are scattered all over the country. This sector primarily being an un-organized sector & has only local level (district/region level) associations. In the absence of any centralized National or State Level association, the source to get a list of stone crushers in the state was identified as the State Pollution Control Board.
It was therefore, for the purpose of collecting information on number of stone crushers in various states, their capacities, technologies used etc, request letters were sent to all State Pollution Control Board offices through CPCB. Many SPCB have responded with the list of stone crushers in their respective states, some states have sent only partial list for some districts/region and some states have not responded. The compilation of the information received from various states has been made and is given at table below for information.
All quarrying and stone processing operations including surface mining, crushing, screening, material handling and transfer operations are potential sources of particulate emissions. These sources may be categorised as either process sources or fugitive dust sources. Process sources include those sources for which emissions are amenable to capture and subsequent control. Fugitive dust sources generally involve the re-entrainment or settled dust by wind or machine movement. Factors effecting emissions from either source category include the type, quantity and the moisture content of the rock processed, the type of equipment and operating practices employed as well as topographical and climatic factors.