Preparation method and application of a kind of inorganic powder material

Abstract

The invention discloses a preparation method and application of an inorganic powder material, which relates to an environmentally friendly new material. The oxide or / and oxide precursor is ground for the first time, then roasted, washed with water, and dried, and then ground for the second time after drying to obtain the inorganic powder material. Described oxide can be selected from at least 3 kinds in CaO, MgO, SiO2, Fe3O4, Fe2O3, Al2O3 etc., preferably the mixture of CaO, SiO2, Fe2O3 and Al2O3, the mass ratio of CaO, SiO2, Fe2O3, Al2O3 can be 13: 5:1:1.5; the oxide precursor can be selected from at least three of Ca(OH)2, CaCO3, MgCO3, Mg(OH)2, Fe(OH)3, Al(OH)3 and the like. The inorganic powder material can be applied in treating industrial heavy metal sewage.

Description

technical field [0001] The invention relates to an environmentally friendly new material, in particular to a preparation method and application of an inorganic powder material. Background technique [0002] Industrial water pollution has always been a key target of prevention and control. Many production and manufacturing industries, such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, instrumentation and other industries, will produce heavy metal wastewater in the production process, which seriously affects environmental safety. Heavy metal elements and their compounds will change the protein structure, affect the protein function, and then affect human health. Heavy metal pollutants are difficult to control. When they accumulate in a certain amount in the water body, they will cause serious harm to the biological system of the water body, and may affect human health through the food chain. However, heavy metal ions are discharged into th...

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Problems solved by technology

However, each treatment method has disadvantages

For example, the chemical method will produce flocculent sludge that is difficult to handle, and at the same time, the dosage of chemical reagents is large, which is likely to cause secondary pollution; the physical treatment method requires modification before adsorption by activated carbon, which increases the treatment cost. The cost also limits its application; the investment cost of using ion exchange resin or membrane separation method is large (the exchange performance of ion exchange resin decreases by half or less as the number of times of use increases, and it is suitable for water quality with a single ion component), and the amount of recovery is large. A large amount of chemical reagents need to be injected, resulting in high treatment costs; the use of biological treatment methods has strict requirements on the concentration of heavy metal ions, high requirements on the aqueous solution environment, and long treatment cycles

These defects make the existing processing methods have great limitations in practical application

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