Composition and device for treating acidic iron ore waste liquid and preparation method of composition

Abstract

The invention discloses a composition for treating acidic iron ore waste liquid, a device and a preparation method of the composition. The composition comprises the following components in percentage by mass: 40-50% of low-alkali cement, 5-15% of polyethyleneimine, 5-10% of an immobilized microbial agent, 0.1-0.5% of a foaming agent, 0.1-1% of clay, 1-2% of activated carbon, 0.5-2% of plant fiber and the balance of water. The device is a plate-shaped filter material, and the device is prepared from the composition. The matrix material is low-alkali cement which is subjected to foaming treatment, a device which is provided with a large number of air holes, suitable in hardness and used for treating the acid iron ore waste liquid is formed, and the device has certain hydraulic impact resistance; the device can efficiently and rapidly adsorb metal ions in the acidic iron ore waste liquid and improve the pH value of the waste liquid, and the treated plate collects a large amount of metal elements such as iron and the like and can be used for cultivation and field planting of aquatic plants in water ecological restoration after professional treatment.

Description

technical field [0001] The invention belongs to the technical field of mine wastewater treatment, and in particular relates to a composition, a device and a preparation method for treating acidic iron ore waste liquid. Background technique [0002] With the rapid development of social economy, the human demand for mineral resources is also increasing, and the discharge of industrial wastewater generated during the mining and processing of mineral resources is also increasing. Among the mine wastewater, the most polluted and most harmful is the acid wastewater discharged from the mine. Because the acid mine wastewater contains a high concentration of heavy metals and a low pH value, it has a serious negative impact on mining production and the ecological environment. In the production process of mining enterprises, the main reason for the production of acidic wastewater is due to the sulfide minerals contained in the ore and surrounding rocks. , and form acid mine wastewater...

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Problems solved by technology

[0003] Due to the low pH value, high acidity, and a large amount of heavy metals, acid ore wastewater cannot be recycled directly. It is usually discharged into rivers, lakes and other water bodies near mines, which changes the pH value of the water body, inhibits or prevents bacteria and The growth of microorganisms hinders the self-purification of water bodies

The interaction between acidic water and minerals in the water body will generate certain salts, which will have adverse effects on the growth of freshwater organisms and plants, resulting in serious pollution of the water body around the mining area, causing most aquatic organisms such as fish, algae, and plankton. Organisms die and destroy the aggregate structure of the soil, making the land harden and the crops withered and yellow; in the state of anoxic, a large amount of SO4 in the acid mine wastewater 2- Under the action of desulfurization bacteria, the produced H 2 S gas has a serious poisonous effect on organisms; acidic wastewater has a strong corrosive and destructive effect on water pump accessories, pipes, and tunnel equipment, resulting in frequent equipment maintenance and directly endangering the safety of miners. If the natural water body is polluted by acid for a long time, it will Make the water gradually acidify, causing serious damage to the ecological environment

[0004] At present, the commonly used method for treating acidic wastewater has the following several: 1) neutralization method, in acidic mine wastewater, add certain alkaline substances to carry out acid-base neutralization treatment, make it take place neutralization reaction, improve the mine wastewater The pH value makes the wastewater neutral, but some heavy metal ions that are specially removed are not easy to be removed; 2) vulcanization method, the vulcanizing agent is put into the mine waste liquid to make it fully react, and the large amount of metals present in the mine wastewater Ions are removed by precipitation and filtration to obtain relatively clean mine wastewater, but hydrogen sulfide harmful to the human body is often generated when using vulcanizing agents, so this method is rarely used; 3) Extraction electrowinning method, using mine wastewater Separation of different solutes in the extractant based on the solubility of different solutes in the extractant. This method can efficiently remove heavy metal substances in mine wastewater. The efficiency is relatively high, but it has a certain selectivity. High extraction efficiency; 4) Microbial method can effectively treat heavy metals or other polluting substances in mine wastewater, but microorganisms are not easy to survive, and cannot be used for long-term continuous treatment of polluting substances.

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