In order to remove arsenic from the alkaline solution for reuse, the leaching slurry should be concentrated and filtered. The unit area of ​​concentration is 0.58~ 0.85 meters ² (tons, stay up all night), when adding polyacrylamide, can be reduced to 0.18~ 0.23 meters ² (tons, stay up all night). Concentration results of the leached pulp product indicate that the amounts of -6 and -15 microns are actually equal. The unit productivity of the filter is 3~7 tons / (m ² , day and night), that is, the usual process equipment can be utilized.

The obtained alkaline solution contains As 2~ 3.9 grams / decimeter ³ , S 2.8~ 8.9 grams / decimeter ³ . The remaining concentration of sodium hydroxide is 30~ 35 grams / decimeter ² . Most of the arsenic in the alkaline solution can be precipitated by the method of adding lime, and the mother liquor can be recycled (the residual concentration of As does not exceed 0.3~) 0.4 g / decimeter ³ ). Part of the sulfur precipitates together with arsenic. The precipitate contains 37.6% calcium arsenate and 16.8% calcium sulfate , which means that the product is actually in line with the process requirements of arsenate. Sodium hydroxide is regenerated 20 to 30% during the treatment . To solution purification to the limit allowable concentration, may be added in the phosphate solution for deep purification.

According to the results of the concentrate treatment research, the following processes are recommended, including: air jet grinding (milling the prepared product to a particle size of -15 microns), leaching with sodium hydroxide solution, adsorption cyanidation, and pre-existing products according to production. metallic gold and silver flow to the desorption, the basic repeated purification mother liquor for recycling or disposal (FIG. 2). Technical and economic calculations show that the cost of concentrate processing is 30% lower than the actual situation of MJI3 after arsenic removal .

The process can be tested on a large scale to solve the possibility of practical application.

FRP Pressure Tank

Our FRP Pressure Tanks are designed to withstand high working pressures of 125PSI and 150PSI, making them suitable for various industrial applications. The tanks are manufactured using a combination of epoxy resin and glass fiber winding reinforcement, ensuring strength and durability. The liner of the FRP Filter Tank is made from food-grade PE raw material, which guarantees the safety and purity of the filtered water.
The manufacturing process involves blow molding/rotomolding integrated molding, which results in a seamless and leak-proof tank. The automatic CNC winding technology ensures precise and consistent winding, leading to a higher quality product. The tank mouth is available in threaded or flanged joints, providing flexibility in installation.
Our FRP Pressure Tanks have undergone rigorous testing and certification. They have passed NSF, CE, and ISO9001 certifications, ensuring compliance with international quality standards. The tanks have also been subjected to more than 100,000 fatigue tests, which is four times the burst pressure. This indicates their reliability and ability to withstand extreme conditions. With their high working pressures, durable construction, and certifications, they are a reliable choice for water treatment systems.

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