Biological ceramisite filter material made of vulcanized lead zinc ore flotation tailings, and preparation method thereof

Abstract

The invention relates to a biological ceramisite filter material made of vulcanized lead zinc ore flotation tailings. The material is characterized by being prepared from 80-90wt% of vulcanized lead zinc ore flotation tailings, 8-18wt% of clay, 1.5-2.5wt% of pore former and an additional bonder, wherein the pore former is sawdust, bamboo scraps or straws, the bonder is lignin calcium xanthate, sodium carbonate or sodium silicate liquid, and the solid-to-liquid ratio of materials used by the biological ceramisite filter material is (8-12):1. The preparation method comprises the following steps of: weighing based on proportion of main and auxiliary materials; drying; mixing; forming; drying; preheating; roasting; and cooling to prepare a biological ceramisite filter material product made of the vulcanized lead zinc ore flotation tailings. The preparation method is simple and convenient to implement, free from secondary pollution, practical and reliable. The biological ceramisite filter material made of the vulcanized lead zinc ore flotation tailings provided by the invention has the advantages of turning ore waste residue into wealth and greatly lowering the cost of materials, so that the biological ceramisite filter material is a high-quality water treatment agent.

Description

Technical field [0001] The invention belongs to the technical field of preparation of water treatment agents, in particular to a biological ceramsite filter material for flotation tailings of lead-zinc ore and a preparation method thereof. [0002] Background technique [0003] Tailings refer to the ore mined from metal or non-metal mines, and the waste residue discharged after the valuable concentrate is selected by the concentrator. Due to the large amount of these tailings, they contain useful or harmful components that cannot be treated temporarily, and if they are discharged randomly, they will cause resource loss, flood farmland or silt up rivers in large areas, and pollute the environment. For example, at present, the main treatment method of tailings in my country is stockpiling in tailings ponds, which not only increases the additional cost of mineral processing, but also is a major source of danger and environmental pollution. cause environmental pollution accide...

AI Technical Summary

Problems solved by technology

Although the ceramsite filter material has the advantages of high porosity, stable chemical properties, high mechanical strength, good filtered water quality, strong permeability, and high filtration rate, its main technical indicators are superior to quartz sand and anthracite filter materials, and can be widely used in tap water filtration. , urban sewage treatment and filter media used in petroleum and chemical industries, etc., but there are still the following main problems: First, the treatment effect and economic performance cannot be perfectly combined. For example, the ceramsite filter material with good adsorption performance has a large specific surface area, but its strength Low cost, short service life and high cost of regeneration treatment; ceramsite filter material with good economic performance has high strength, small specific surface area, low cost of regeneration treatment, but poor adsorption performance

The second is that the main defects of ordinary ceramsite filter materials are: insufficient surface roughness, poor hydrophilicity, difficulty in attaching microorganisms, complicated preparation and firing processes, poor uniformity of ceramsite finished products, inconvenient application, and unreasonable specific gravity. A fluidized state is formed in the biofilter, the probability of contact between microorganisms and pollutants is small, and the treatment efficiency is low

Third, the main raw materials for preparing ceramsite filter materials are limited to the above-mentioned materials, which are relatively single and cannot meet the treatment requirements of different water quality sewage

[0005] Chinese patent application 200610010355.4 proposes a "biological ceramsite filter material and its preparation method", the biological ceramsite filter material is made of shale, fly ash, sludge , pore forming agent and binder, although it can overcome the low porosity of the existing ceramsite filter material, especially the low specific surface area, poor adsorption capacity, and low pore content caused by insufficient surface roughness and poor hydrophilicity The problem of small amount of microbial immobilization and low immobilization rate, but due to the use of sludge and other raw materials in this formula, the roasting temperature is limited to 1000 °C, while the minimum temperature requirement for general ceramsite firing is 1080 °C, the temperature Insufficient will lead to the disadvantages of low strength, brittleness and cracking, and low utilization rate of the fired finished product

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