Samantha

Sand making machine, as the crushing machinery that is widely used, has been successfully used in the grinding system of cement, which plays the role of effectiveness of the energy-saving. However, there are many cement plants that do not reach the expected effect. The technology ideas and the direction of the usage of sand making machine in cement grinding system are correct. In the cement grinding system, the pre-crushing process of sand making machine is usually installed in the grinding head parts so that the temperature of clinker that enters the sand making machine is very high. And the slag contains more impurities, which will cause the serious wear of the wearing parts of the sand making machine, resulting in the frequent replacement. It will also make many manufacturers question the economic benefits of this process, canceling the desire of purchasing the machine. Sand maker is a high-speed rotating equipment, the temperature of the clinker in the machine is generally required to be controlled below 80 ℃. The calcining level of each cement plant is not the same. The temperature of the kiln clinker is around 100 ℃at the minimum, the higher can be up to 200 ℃ and the average temperature is about 150 ° C. Since the bulk solid materials such as clinker have slow cooling rate and the short time that they are put in the clinker storage, the cement clinker storage is near from the cement milling head so that the clinker temperature will not be effectively reduced. Especially in the hot summer, the actual temperature of the clinker in the sand making machine will be higher. If the temperature of the clinker into the machine is too high, it will exacerbate the wear and tear of wearing parts, affecting the service life of the machine. In addition, although some of the cement plants will install the de-ironing separator on the belt conveyor, it still can not guarantee that the iron impurities will not enter the machine cavity. To clean up the impurities is time-consuming, affecting the production efficiency.

Due to the differences of building requirements, as for the sand making machine, the requirements of the material and the fineness of the material are also different. The existing sand is limited, the continuous mining makes the standard sand drop. With the increasingly high building standards, the standards of the sand aggregates also becomes higher correspondingly, which promotes the technology of the relevant equipment to develop continuously. Therefore, the new sand making machine comes into being.
The development of artificial sand is suitable for the policies of the country. It has a lot of advantages such as it can make up for the shortage of the grit in the natural sand, the grades of the sand can be manually deployed, the composition of the sand can be artificially controlled and the abandoned each kinds of tailings or waste rock can be made full use to reach to the purpose of the comprehensive utilization. The shortage of the sand resources opens a broad space for for the application and promotion of artificial sand.
The new sand making machine developed by the Henan Hongxing Heavy Industry can be widely used for the processing of a variety of ores, cement, refractories, aluminum where the soil clinker, emery, glass raw materials, mechanism building sand, stone and various metallurgical slag, especially for the handling of silicon carbide, silicon carbide, sintered bauxite, hard and corrosion-resistant materials. It not only reduces the environmental problems caused by the mining of the sand, but also makes a contribution to solve the shortage of the natural sand and poor quality of the sand resources.
The machine is designed to provide high-quality sand and gravel aggregate for highways, high-speed railway, buildings, municipal projects, construction of hydroelectric dam and concrete mixing station and it is the preferred equipment for artificial sand making and stone shaping field.

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In the construction projects of the high-speed rail and highway, the proportion that the artificial sand has accounted for has been far more than that of the natural sand. Compared with the natural sand, artificial sand is more qualified than the natural sans in the terms of the grain type of the finished products, the gradation effect and quality. In addition, currently, there are also a variety of problems in the mining and stock of natural sand, artificial sand is bound to become the new darling of the era. Many mining equipment companies also gradually improve the R & D and production of sand making machine to a new level.
The artificial sans making process refers that the users conduct reasonable processing of the rocks and river pebbles through sand making machine to achieve the particle size and gradation of the gravel raw material that is used for the construction. Though the process is same, the full set of sand production line provided by the individual mining machinery enterprises is not same. Of course, the product quality is uneven.
The full set of sand making production line is generally divided into several systems: delivery system, broken systems, screening systems and sand washing system. The delivery system consists of a feeder and other equipment; broken system mainly consists of coarse crushing, fine crushing, sand making processing; the screening and washing system mainly contains vibrating screen and sand washer.
The production capacity of the full set of sand production line developed by the Hongxing Heavy Industry is about 100-400 tons / hour and it can be used for the crushing of hard limestone, granite, basalt, river gravel and other materials as well as the artificial sand making. It is suitable for hydropower, building materials, highway, urban construction and other industries.

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Sand washing machine can be used to wash and separate the rock flour and soil in the sand and its novel seal structure and reliable transmission ensure the effect of cleaning and dehydration. It is a kind of efficient sand washing equipment. Sand washer is widely used in a variety of industries such as construction sites, gravel plants, hydropower and concrete dam site and so on; it is featured with high cleanness, reasonable structure, large processing capacity, low power consumption and less loss of sand in the sand washing process. The transmission parts are isolated from the water and sand so that the failure rate is much lower than that of the commonly used sand washer. It is the best choice for upgrading domestic sand washing machine.
It is necessary to frequently check the oil level of the reducer, the tightness of the V-belt, the degree of engagement and lubrication of the gear and whether the connected fasteners are loose to ensure that the machine is in a normal and stable working condition. At the same time, adequate lubrication of the friction parts and periodic lubrication are also important. It cannot be ignored that the lubrication of the reducer should be changed after the lubrication for the first time one month ago.
In the use of sand washing machine, there should be a dedicated technical staff in charge that must possess the necessary skills. Before the installation of the sand washer, the operating staff should be trained in technical operations to make them understand the principle and the performance of sand washing machine and familiar with operating procedures. In addition, it is necessary to equip necessary repair tools as well as lubricants and accessories.

 

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After being used for a period of time in the harsh working environment, it is inevitable for the sand maket to get rusty on the surface of the machine and be worn and some other problems. The following is the ways of dust removal for the sand making machine.
Chemical rust removal: this way is the kind of rust removal method that mainly adopts the principle that the acid is easy to have chemical reaction with the metal oxide to remove the corrosion products on the surface of the equipment. It is commonly known as a pickling rust, which only can be conducted in the workshop.
Small size pneumatic or electric rust removal: this method mainly use the electricity or compressed air as the driving force and using the appropriate rust removal device to conduct reciprocating or rotary movement to adapt to the dust removal requirements in a variety of occasions. The angle grinder, wire brush, the pneumatic needle beam scaler, pneumatic knock rust hammer and tooth rotation scaler belong to the semi-mechanized equipment, which have lightweight and large maneuverability. They can remove the rust and the old coatings more thoroughly. It can also play hair treatment of the coatings, but it can not reach the quality of the surface treatment and the efficiency is lower than that of the injection treatment. It can be used at any site and it has been widely used particularly in the ship-repairing process.
The high-pressure water abrasive blasting: it makes use of the impact role (plus the grinding action of the abrasive) of high-pressure water jet to destroy the adhension of the rust and the coating on the steel plate. It has the features of no dust pollution and it does not damage the steel plate, greatly improving the the rust removal efficiency. In addition, the rust removal quality is good. However, the steel plate after the rust removal is easy to get rusty again and it needs the dedicated wet rust removal coating.

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It is known that the sand making machine is the kind of equipment that mainly uses the impact role to crush the brittle materials. Therefore, it is also known as the impact crusher. The sand making machine is a dedicated device for the production of construction sand and it is especially suitable for the fine crushing and secondary crushing of abrasives, refractories, cement, quartz sand, grit, slag powder, copper ore, iron ore, river gravel, concrete aggregate, asphalt aggregate and other brittle materials. It is the highly efficient and energy-saving sand making equipment.
Compared with the jaw breaker and other crushers, the sand making machine that uses the impact role has the following features:
1) large crushing ratio: the crushing ratio of the impact crusher can reach more than 50, while the crushing ratio of other kinds of crushers is not easy to over 20.
2) the product particles is uniform. Under the impact effect, the material to be broken breaks along its weakest level. This elective fragmentation method helps the higher probability of the cube shape of the products. Therefore, the content of the flakiness products an be lower under the 10%, while the percentage of the flakiness products produced by other crushers generally will be higher than 15%.
These characteristics mentioned above make the sand making machine plays an important role in many broken machinery. For other crusher, sand making machine has a great advantage, but it also has some objective flaws. The sand making machine adopts the impact principle to crush the materials, so the parts such as: hammerhead, hammer, counterattack plate are east to get worn. This kind of deficiency will limit the scope of application of the sand making machine in quite a long time and it needs the constant improvement in the future development.

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As one of the main equipments among the mining machinery, it is important to conduct regular maintenance for the sand making machine. However, because of the long usage time as well as the unreasonable maintenance and operation, it is easy to result in the problems of the sand maker. Taking the noise of the sand making machine as an example, in the operation process, it is normal to produce some sound for the sand making machine because of the nature of the machine itself, but if the sound is excessive, which indicates that there are some failures or the sand making machine needs maintenance. This article will focus on the introduction of the reasons and the solving skills of the noise.
It is inevitable to generate some sound for the sand maker due to the characteristics of the machine, however, if the noise is too large, the operator should stop the machine and check the parts to find out the problem. If the part is damaged, it should be replaced timely. As for the replacement of the related accessories, it is best to choose the parts that the manufacturers of sand making machine directly supply or purchase the accessories with good quality. In addition, another method to reduce the sound of the sand making machine is to keep the good lubrication of the various parts of the sand making machine. Regular cleaning of the bearings and the parts that are easy to produce friction and clearing the dust and dirt on a regular basis are necessary. These works can, on the one hand guarantee the normal production, on the one hand and, can reduce noise pollution.
Henan Hongxing Heavy Industries is a professional manufacturer of mining equipment which includes the entire set of equipment of sand production line, stone production line and beneficiation production line, wining a good favor in the market.  

Sand washer is widely used in construction sites, gravel plants, hydropower concrete dam site and other industries. Sand washer is featured with high cleaness, reasonable structure, large processing capacity, low power consumption and the less sand is washed away in the working process of sand washing equipment. In addition, the transmission parts of the sand washer are isolated from the water and sand, which makes the failure rate much lower than that of the commonly used sand washer. It is the best choice for the upgrade of the domestic sand washer in the industry.
1, it is necessary to frequently check the oil level of the reducer, the tightness of the V-belt and the degree of engagement and lubrication of the gear, find out whether the connected fasteners are loose or not. All of these are made to ensure that the machine is in a normal and stable working condition. At the same time, adequate lubrication of the friction parts is necessary and the periodic lubrication is also indispensable. 
2, after the reducer has been in operation for a month under the premise of that it is lubricated for the first time, it is necessary to timely replace the lubricant. When filling the lubricants, the operator should filter the lubricants. In the south, the selection of the lubricants model should be higher in the terms of viscosity of the lubricant than that in the North.
3, when the sand washing equipment is in operation, there should be a dedicated technical staff person in charge and the operator must possess the necessary skills. Before the installation of the sand washing machine, it is necessary to conduct technical operations training for the staff so that they can understand the principle and performance of sand washing machine and be familiar with the operating procedures. 
4, it is necessary to be equipped with the necessary repair tools as well as lubricants and accessories.

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According to the development environment of the building materials in China, sand and gravel industry should develop towards the following three main objectives:
1. Saving resources and developing artificial sand. At present, the production of natural sand and artificial sand account for 50% respectively. However, with the reduction of natural sand resources and the need for environmental protection, developing artificial sand is the future trends.
2. Getting benefits from technology and deepening industrial construction. Currently, our society has entered a period of industrialization as a whole and some backbone enterprises of the sand and gravel industry has made great achievements in factory management, equipment mechanization level (sand making machine, sand washer) and the degree of automation. The sand and gravel industry must conduct a few efforts to practice in the above aspects, if they cannot do well in these facets, to some extent, they will not keep up with the pace of industrialization of the whole society. The sand industry should change their concepts and they should not only focus on the operating and efficiency. The sand industry should establish high standards, which will bring up a chain reaction. And then the operation mode will be adjusted, operating system to be changed and the market will be active again so that the productivity of labor, management level and especially the use ratio of sand and gravel will significantly improve. The quality of the gravel and the system to ensure the quality of the sand and gravel will be effectively guaranteed, the organization guarantee will also be more reliable and the development of sand industry is just a matter of time.
3. Extending industry chain and increasing the value-added of products. The extension of the sand and gravel industry is a two-pass, the upward direction is to develop and manufacture mining machinery and the downward direction is to develop commercial concrete and construction, having large development space. The room for the alliances and reorganization of sand enterprises is large and it can combine with concrete, cement, mining, machinery manufacturing, sales and other industries to make a cross-industry, cross-cutting industry group integration. Taking cement industry as example, it needs to study the upstream and downstream industries when doing its own industry well. Learning from the development experience of cement, sand and gravel industry can determine their position in the big industrial chain. The sand enterprises should get benefits from the, conduct deep processing of the products to make value-added, make full use of the advantages of other industries, implement the good idea and have the courage to go beyond.

original link: http://letters1238.blog.com/

 

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1. The exploitation way is backward and the technical level needs improving. Because of the relatively backward exploitation way, the mining utilization and labor productivity industry are still low and the particle size standards and the problem of environmental protection need further enhancing and improving. All of these problems will affect the overall effectiveness of the sand and gravel industry (sand maker). Despite all that a number of artificial sands enterprises have established factory management, compared with other industries (such as cement, commercial concrete) in the building materials industry, the sand and gravel industry still needs improving in terms of mechanization, automation and management level. In technology, the sand and gravel industry mainly adopted natural development, exhausting energy and time. Although the number of patents is increasing year by year in the industry, the industries develop unevenly in the building materials industry. The exploitation way (sand making machine, sand washer), utilization and particle size of the sand and gravel have great impact on the durability, coagulation and shock resistance of concrete, which influence the rapid development of the construction industry. Therefore, for the sand and gravel industry, it is necessary to upgrade the mining method to accelerate technological innovation and enhance management to improve the utilization efficiency.
2. The number of enterprises is large, but small-scale and management needs to be improved. While many regions have established management station to engage in commercial management, but in some areas the workshops operating still exist without the state of industrialization management. Restricted by the regions and market limitations, the single mining field lacks standardized management and profit model and fails to reflect the expected economies of scale. The scale plays a big role in the enterprise management. The benefits not rely on management alone, but the scale itself would produce benefits. Therefore, if the enterprises want the economies of scale, they should expand their scale and improve the management level.