At HuaHaiYuan, we pride ourselves on high quality mesh Fence, available in a variety of types. Each fence features a long service life at a low cost.
Specifications: Based on the height of each mesh fence, panel options include 2, 3 or 4 curves, with height options ranging from 1030 to 2500mm, and a width range of 2500 to 3000mm.
Wire diameter is traditionally 4 or 5 mm, and welded together at each intersection for a high strength performance. Each panel has vertical barbs of 20 to 30mm along the top edge. Mesh pattern options include 100 × 50mm, 150 × 70mm, or 200 × 50mm. If a customer needs different specifications, we can easily customize sizes to meet their unique needs.
Each panel is attached in a lateral manner to the posts with a specialized attachment made out of metal, acting as a security clip. The square posts (50 × 50mm, or 60 × 60mm), are then covered with a plastic cap. Specifications can also be customized.
Coating Techniques & Colors: Each Welded Mesh Fence panel is galvanized before undergoing a PVC coating adhesion process to ensure compliance with GB/T18226-2000 standards. PVC coating colors generally include RAL6005 and RAL9003, however, we do offer other options upon request.
Application: This particular type of fencing is widely used in gardens, factories, roads, highways, public buildings, parks, government buildings, ball courts, and industrial or commercial sectors.
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NK-1 and MG withdraw gold from wastewater containing trace amounts of gold
First, NK-1 activated carbon
Nankai University has studied an NK-1 activated carbon that can extract gold from waste water containing trace amounts of gold.
The NK-1 activated carbon can effectively extract gold from wastewater by static and dynamic tests (Au concentration is about 0.05×10 -4 %). The adsorption rate is 97.1%.
When NK-1 activated carbon was loaded with gold, the adsorbent was soaked in 1% NaCN and 5% NaOH mixed solution for 4 h, and then rinsed with 2 to 3 bed volumes of acetone. The rinsing efficiency was 97.2% to 97.7%.
This new type of adsorbent has broad prospects.
Second, MG polymer flocculation
In hydrometallurgical hydrometallurgy, gold is present in the leaching solution of HAuCl 4 , in order to solve the gold recovery of AuCl 4 - concentration at 5μg/ml, the Polymer Research Institute of Sun Yat-sen University proposed to recover the gold in the high-frequency flocculation system. gold. The MG cationic polymer, and sodium tripolyphosphate and sodium thiosulfate effect of the ligands on the gold formulated flocculation system, their recovery rate of 90% to 95%, flocculation and sedimentation can be obtained by burning gold . The suitable conditions for the recovery of gold and the flocculation mechanism of MG/Na 5 P 3 O 10 were studied.