Rotary Sand Drying Equipment Shell Type For Drying Cement Sea Blast Sand

Specification of Drum Sand Dryer:

Rotary Sand Dryers are divided into several categories according to the different types of sand, such as river sand dryers, silica sand dryers, dryers for mountain sand, sea sand and sand of casting applications, etc.. those different types of sand have different physical properties like sizes, moisture, etc.. and according to final their applications, they are always specific requirements for final dried sand. For example, silica sand for ceramic and glass industry, Iron is very sensitive in the material and cause coloring of final products, so stainless steel is used to avoid iron contamination. Meanwhile, same dryer may have different output capacity because different physical properties (see following chart).

How Does It Work ?

Triple Pass Rotary Dryer has 3 drying zones in the 3 cylinders (internal one, middle one and external one) which construct the rotating body. Heat processing of a product with high moisture content is done efficiently in those 3 drying zones. The product is put in from the inlet of the hopper, sent to the internal cylinder where heating of the product is made, then moves to the middle cylinder where evaporation of moisture is promoted further. The solid constituent of the product is gradually broken into pieces and discharged from the outlet via the third final drying zone. The hot air produced in the furnace is sent to the internal cylinder, passes through the middle and external cylinders. The hot air is then sent to the cyclone where dust is removed.

Nowadays, our three-cylinder rotary sand dryers have completely replaced conventional rotary dryers in sand drying plants and they been proved to have many advantages.

1. Heat efficiency improved 40% more than conventional rotary dryers
2. Coal consumption (as fuel) is 30% of conventional dryers, less than 9kgs of coal to dry 1 ton of sand and power consumption is 60% of conventional dryers.
3. Output sand and outer shell temperature is no more than 60 C, exhaust air temperature is less than 120 C. filter bags can work twice longer time than conventional dryers, the output sand could be conveyed to warehouse directly without further cooling.
4. Airtight sealing avoids air leakage in conventional rotary dryers
5. Floor area requested for installation is 40% of conventional rotary dryers, saving 60% of infrastructure costs.
6. Output moisture could be guaranteed at 0.5% to 1% if input moisture is 15%, it is ideal choice for cements plants, dry mixed mortar plants, etc..
7. Heating source could be anthracite, bituminous coal, coal gangue, oil and gas. It could dry materials in lumps(size less than 40mm), granular and powdery materials.
8. Price is no more than 20% of similar equipment made in Europe. The barrel is made of manganese steel. Wear resistance is improved by 3 to 4 times.