One of the bentonite activated clay belongs to the deep processing of products, to fill the gaps in our province. In the production process using the acid recycling technology and extrusion process to add special additives, effectively improves the product quality, product performance is close to America TONSIL particulate clay index.
Activated clay production method of bentonite as raw material of activated clay production bentonite as raw material are all wet, dry, semi wet, vapor phase method, calcination etc.. The conventional wet is bentonite, sulfuric acid, water after mixing in the case of mixing heated to 100 ℃ activation for a period of time after washing, drying, crushing to obtain the product. Disadvantages of this method is the largest consumption of acid, resulting in washing water consumption, serious environmental pollution, high cost. The following steps: processing; the original soil beating, purification and emission sand and water; adding acid and water, in the range of 80 ~ 100 ℃ activation of 10 – 30min, and at the same time, 1000r/min and stirring; filtering, filtrate recycling and refining purification step, the filter residue to the next step; drying, crushing; finished product testing, packaging. Dry the traditional production process is a small amount of sulfuric acid and water and Activated Bleaching Earth mixture and stir well, for a period of time, then drying, grinding to obtain the product. Although this method reduces the consumption of acid, no waste water discharge, the pollution of the environment, but the quality of the products is low, which greatly limits its use.
The following steps: processing; adding acid and water extrusion method at room temperature solid phase activation; drying and crushing; finished product testing, packaging. The production process and semi wet is a small amount of sulfuric acid and water and bentonite mixture and stir well, activated under certain temperature (placed) for a period of time, then adding acid and water and then a second step activation.
The following steps: processing; adding acid and water at room temperature solid state extrusion method activation; adding acid and water activation; rinsing; filtering; drying, crushing; finished product testing, packaging. The production process and semi wet it can solve some problems of the wet and dry, simple process, low cost, high product quality.
The main technical indexes of activated clay:
1, appearance: white or light coloured fine powders
2, water: ≤ 12%
The decolorizing capacity: 3, ≥ 154
4, activity: ≥ 180mol/kg
5, size (by 200): 95%
6, free acid: ≤ 0.20%
7, the content of heavy metal (Pb): 10mg/kg
8, the arsenic content: ≤ 3mg/kg
Products are mainly used in grease (refining decolorization dynamic, vegetable oil), chemical (soap), Sinopec (lubricating oil, paraffin, naphthene acid etc.), pharmaceutical and other industries. The quality of the products exceeded the national standard, the performance is stable, with a low rate of oil, high decolorization ability, add less, particle size uniformity, filtration speed.