Skip to main content

Method for clearing sand washing wastewater

Sand washing wastewater refers to the wastewater generated by the washing sand and gravel production enterprises in the production process. Sand and gravel is one of the basic materials of the building. With the increasing demand for domestic sand and gravel, the natural sand is facing the reduction of resources and environmental protection. The pressure, washed sand will be used as an important source of construction sand in the building materials market. Washed sand can be widely used in concrete, mortar and products. It has become a good market prospect in modern construction projects. The replacement of natural sand in quality and quantity is one of the signs that the artificial sandstone production line has entered a new era of development.

Characteristics of sand washing wastewater

tailings_dewatering_screen

The sand washing wastewater is the water produced by sand dewatering screen. The main pollution factors are chemical oxygen demand and suspended solids, and the suspended solids content is the largest, the concentration is about 3000mg/L, forming a large amount of muddy water. The characteristics of the mud depend on its composition and are related to the local geological conditions. The general characteristic is that the mud is yellowish in appearance, uniform and sticky, and does not stratify for a long time. The specific gravity is between 1.20 and 1.46 (including the specific gravity of yellow sand). The mud content is 20% to 30%, and the pH value is 6 to 7. Before the wastewater is not comprehensively treated, it will be produced for 8 hours per day, 25 days per month, and 10 months per year. The annual production of wastewater is 80,000 tons (here is calculated by one mill). These wastewaters have about 80 tons of chemical oxygen demand (COD) and 8,000 tons of suspended solids (SS). If they do not treat their production wastewater in a timely and effective manner, they will not only waste a lot of water resources, pollute water quality, affect road traffic, and affect nearby areas. The normal production and life of residents will even intensify social conflicts and increase disharmony factors in society.

Sand washing wastewater treatment method



 The treatment of sand washing wastewater is nothing more than the separation of mud and water, and the mud sand is separated by physical methods. Since the sand washing wastewater contains a large amount of sediment, the fine sand is first precipitated by the deep sediment purification body, and then the fine sand is precipitated. Control the solid content entering the dosing and flocculation step to achieve the purpose of reducing the cost of the drug, and then add the flocculant to form a pellet precipitate. The supernatant enters the clear water pool for reuse, and the lower sludge enters the sludge dewatering equipment (sludge pressure) Filter machine), mud cake for transportation.




Comments

Post a Comment

Popular posts from this blog

The characters of Dense Medium Cyclone

  Features Of DMC 1. The separation efficiency of the heavy medium cyclone is relatively higher than that of the ordinary hydrocyclone, which is also one of the important factors that people like to use it. 2. The adjustment range of the separation density of the heavy medium cyclone is relatively wide: the separation density of the heavy medium coal separation is generally 1300 kg/m3 ~ 2200 kg/m3 and it is also convenient to adjust this is its advantage. 3. The heavy-medium cyclone has a relatively strong use capacity and not only has a wide range of sorting strength, but also has a good effect on the quantity and quality of coal preparation. 4. The sorting particle size range is wide. The size limit of the lump coal separator is generally 100-6mm, and the particle size limit of the fine coal heavy medium cyclone is 50-0mm (the sorting depth can reach 0.15mm). 5. The heavy medium cyclone has large processing capacity, the current maximum processing capacity of the heavy medium separat
Post a Comment
Read more

Compost trommel screen manufacturer in China

Composting trommel screen is a kind of sorting equipment widely used in pre-sorting and composting of urban mineralized waste. The screen cylinder of the traditional drum screen is supported by a roller. During operation, the two active rollers on the side of the cylinder are rotated by a motor, a reducer, etc., and the active roller drives the cylinder to rotate by the frictional force, while the other side The two roller wheels act as slaves. This trommel screen has low energy consumption. How does the compost trommel work? The screen surface is the working part of the screening machine and needs to be mounted on the frame and fixed by bolts and pressure plates. The screen body supports a left-right symmetric arrangement, a friction transmission, and a bilateral drive. The screen cylinder is supported on the driving wheel, and the motor rotates through the speed reducer to drive the screen cylinder. The transmission form of the trommel screen is divided into gear transmission
Post a Comment
Read more

300t per hr chalcopyrite washing equipment

Chalcopyrite is a copper-iron sulfide mineral. It often contains trace amounts of gold and silver. Crystals are relatively rare and are tetrahedral-shaped, mostly irregular granular and dense massive aggregates, as well as kidney-shaped and grape-shaped aggregates. Copper yellow, often dark yellow or mottled. The streaks are black with a greenish tint. Chalcopyrite is a relatively common copper mineral, which can be formed in different environments, but it is mainly the product of hydrothermal action and contact metasomatism, and it can often form deposits of a certain scale. The origin is all over the world. In industry, it is the main raw material for copper smelting. In the field of gemology, it is rarely used alone, occasionally as a substitute for pyrite. In addition, it often participates in the composition of some colored stones, inkstones and jade. The high-efficiency spiral chalcopyrite washing machine is mainly used in the washing, grading, impurity removal, and the washing o
Post a Comment
Read more