Rock and crushed stone products will be initially taken away from the deposit by drilling and blasting, after which carried for further processing application. Techniques employed for rock extraction vary because of the property and location of the deposit.

The rock and stone processing mainly include crushing, grinding, screening, size classification, material handling and storage process. The screens separate large boulders from smaller rocks which don’t need primary crushing, therefore decreasing the load to the primary crusher.

As a leading company of mining equipment manufacturing, Dawn is specializing in the design and manufacture of crushing equipment, grinding equipment, sand making equipment and beneficiation equipment. The machines designed by our company are of high quality and competitive price. The mobile crusher for sale is widely used in many countries and were well received by the mine owners and quarry operators. Our mobile crusher for sale aims at satisfying the ever increasing crushing demand. It is designed based on the conception of fully adapting various crushing condition, eliminating obstacles caused by location, environment, consequently providing simple, efficient, low-cost crushing equipment.

Dawn’s portable crushing plant is a newly designed rock crushing & screening plant, which is flexible, convenient and strong mobility, can save a large construction capital and relocation. Raw materials can be reduced at the mine site without being transported again, and also can be moved with the promotional exploitation of the raw material, which saves a large number of transportation costs. Dawn company specializes in producing crusher, screen, transportation, and other rock breaking and minerals processing equipment. On the basis of the licensed technology, we optimize and introduce newly two large and three small series crushing and screening equipment.

The mobile stone crusher can be equipped with different types of crusher for different applications, for example mobile jaw crushing plant for primary crushing process, mobile impact crusher for secondary crushing process, mobile cone crushing plant for effective secondary, tertiary and fine crushing process. In addition, it can be installed with screening plant for separating various sizes of final materials. It combines all the benefits of stationary crushing equipment and fits for versatile mobile crushing applications.

According to Crushing Method( compression, splitting, breaking, shearing, impact or blow, etc.) Of Different Stone Crushers, crushers can be divied 7 types.

Physical properties of river sand
The Philippine is located on the western edge of the Pacific Plate, where there are frequent earthquakes and volcanic activities.

A large number of hard rocks are produced accompanied by the volcanic eruption, they have been impacted for a long time, and they are smooth in surface and contain less impurities. The buildings which used river sand in some reinforced concrete structures can extend their life expectancy and have stable mechanical properties.

Layer structure of river sand
The Philippine river sand is composed of conglomerate, sandstone, shale, basalt, tuff and a small amount of limestone. The solid concrete made of these sands always has uniform texture and physical strength because of the uniform size and hard physical structure.

The mud content of river sand
As mentioned above, the Philippine river sand is mainly produced by the long-term effects of volcanic eruptions, crustal movements and river impacts. For the stratums where river sand stored in are stable, there is only fewer volcanic ash in the sand. So, it’s easy to remove the mud from the sand, and the cost of processing is low.

The chloride ion content of river sand
Because most of the Philippine river sands are collected from the riverbed generated after the volcanic eruption, the colors of the Philippine river sand mostly are black or gray.

The chloride ion content is relatively low. North and central parts have the lowest chloride ion content, below 0.02% on average. It is in line with the international standard for the use of concrete in river sand.

River sand particle size
With low mud content, Philippine river sand can be directly used as building materials after simple sieving. However, some river sands in other regions are mainly larger river pebbles, then a crushing machine is recommended.

The hardness of river sand
The main component of river sand is quartz, so its Mohs hardness is 7. It can be used by mixing with other materials for its good hydrophobic and air permeability.

Based on the above analysis, the river sand in the Philippines has unique advantages in the construction of the river sand supply market due to its low mud content, low chloride ion content, high hardness and perfect particle size which is suit for construction.

The quality of the Philippine river sand is extremely high. The only drawback is that it contains less large gravel, which is not convenient for direct use as construction sand. Therefore, a screening process is needed. Good screening equipment will certainly do more with less for the huge market demand.

The processing of pebble is divided into three stages: coarse crushing by jaw crusher, medium and fine crushing by impact crusher or cone crusher, and sand shaping by sand making machine.

1. Comprehensive utilization of brine: The lithium ingredients and liquid after extracting the chloride after extracting the chloride is extracted to remove the calcium and magnesium ions in the ingredients, add acidic acidization of hydrochloride, evaporates sodium chloride, then removes the iron, and then adds excessive solid alkali Make lithium carbonate precipitates, is washed, centrifugal, and dry, and lithium carbonate products are made.

2. Lime sintering method: Splendin concentrate (6%containing lithium oxide) and limestone by 1: (2. 5 ~ 3) weight ratio ratio. Mixed grinding, fired lithium aluminum and calcium silicate at 1150 ~ 1250 C, crushed through wet grinding, immersed lithium hydroxide with a lotion, filtered by sinking, filtering or washing residue, evaporation and concentration of immersion liquid, and then transparent and concentrated, then Add sodium carbonate to generate lithium carbonate, and then separate and dry it by centrifugation. Compared with lithium sulfuric acid method, the lime sintering method has the advantages of the advantages of simple processes, valuable chemical raw materials, and products with extensive use of products.

3. Use lithium hydroxide and carbon dioxide as the raw material to react with high purity lithium carbonate, or lithium sulfate and sodium carbonate as the reaction. , Generally about 75%, and the product also contains a small amount of lithium sulfate.

4. Sulfuric acid method: The melting hypalole reacts with sulfuric acid, and then purifies it with sodium carbonate reactions.

5. Lime method: The baked liquid pylorus reacts with the lime milk, and then the reaction with sodium carbonate is purified.

6. Taking lithium hydroxide as the raw material, after heating water dissolves it, the insoluble object is filtered, and the clean carbon dioxide gas is passed into the hot filter fluid until the precipitation is not reappeared. To pass, just dry at 110C. Solk industrial lithium carbonate in cold water. After filtering, the filter liquid is boiled and stops heating. It is washed, dried, and dry while hot water.