As an important industrial metal, chromium is widely used in electroplating, alloy and chemical synthesis. However, the waste water discharge of chromium has caused serious pollution to the environment. The combined extraction centrifugal extractor has shown good application potential in the extraction and removal of chromium.

Environmental characteristics of chromium

The presence of chromium in water bodies is mainly in the form of trivalent chromium (Cr³ +) and hexavalent chromium (Cr⁶ +). Hexavalent chromium is particularly toxic, causing great harm to aquatic life, and can also affect human health through the food chain. The effective removal of chromium in wastewater has become an important task to protect the water environment.

Separation mechanism of combined extraction centrifugal extractor

The combined extraction centrifugal extractor realizes the separation of chromium from wastewater by high speed rotation. After the wastewater enters the equipment, under the action of centrifugal force, chromium ions will be effectively settled to the bottom of the equipment. The main steps of the process include:

Feed stage: The chromium-containing wastewater is introduced into the plant.

Centrifugal separation: High-speed rotation causes chromium ions to settle toward the bottom while leaving other lighter components on top.

Collection and treatment: Settled chromium precipitates can be collected and further treated.

Optimized extraction process

In the extraction process of chromium, the following parameters have a significant impact on the extraction efficiency:

1. Centrifugal speed: The increase of speed can enhance the sedimentation speed of chromium, which is usually recommended between 3000-7000 rpm.

2. Extraction time: Appropriate extension of extraction time can improve the extraction rate of chromium, but also need to be controlled to avoid waste of resources, usually recommended in 15-25 minutes.

3. pH value: Adjusting pH value can affect the settling behavior of chromium, which is usually easier to precipitate under acidic conditions (pH 4-6).

Subsequent treatment and utilization of chromium

The extracted chromium precipitates can be treated and recovered by chemical or physical methods. The recycling of chromium not only helps to reduce production costs, but also reduces the impact of wastewater on the environment.

The application of combined extraction centrifugal extractor to extract chromium element from wastewater provides an effective solution for the removal and recycling of chromium, promotes the development of environmental protection, and has a good market prospect.