In order to improve the recovery of silver ore flotation independent, to take measures in three areas: First, for the silver minerals dissemination size characteristics of thickness, silver mineral as fully dissociated, improve the recovery of silver; the second is to select neutral floating or weakly alkaline carbonate mineral slurry alkalinity adjustment and selection of the flotation pulp, to improve the floating silver; Third xanthate and with the use of black powder, to enhance the ability of the collector of silver.
In recent years, under the encouragement of a series of preferential policies of the country, China has been strengthened in the comprehensive mineral processing and recovery of common and associated silver mines. Many mines and refineries have paid attention to the recovery of silver, but in general, there is no major development in mineral processing technology equipment. The recovery rate of silver is not high, and the silver content in different mine tailings is very high (10~30g/t), but it is not recycled.
After silver ore selected from the group (or smelt), the product obtained silver-containing ore concentrates silver, silver, and various mud of non-ferrous metals. At present, the former two are usually subjected to pyrolysis (reverberation furnace, electric furnace, crucible, blast furnace, flash furnace), or by hydrometallurgical separation and extraction, and then electrolytic refining; the latter is mainly in the process of smelting non-ferrous metals. Semi-silver is enriched and integrated into the anode mud (mainly copper and lead anode mud). In China, 98% of silver is recovered from smelting anode mud of various non-ferrous metal mines.
Coupling
Tubing and casing couplings are the joining of two short length pipe, mainly used for the connection and repair of oil pipe and downhole tools
Tubing and couplings thread types : Non-upset thread(NU), External- upset thread(EU);
Casing and couplings thread types: Long-round thread(LC), Short-round thread(SC), buttress thread(BC)
Grade: K55,J55,N80-1,N80Q,L80-1,P110,etc.
Pup joint
Tubing and casing pup joints are machined according to the latest version of API SPEC 5CT. The steel grade includes J55,K55,N80-1,N80Q,L80-1,P110,etc. There are two types of thread widely used in tubing pup joint namely Non-upset thread(NU), External- upset thread(EU);
Casing and couplings thread types: Long-round thread(LC), Short-round thread(SC), buttress thread(BC).
Our testing and inspection method system is complete, using a whole set of thread instrument to inspect taper, pitch, tooth, height, tooth type,etc. The products have passed the identification of china petroleum pipeline. Quality supervision ,inspection and testing center and gained the unanimous praise from the customers.
Crossover
Crossover coupling any size ,length ,grade and weight is available on customer request.
Steel Grade,Steel Oil Casing Collar,Joint Oil Casing Collar,Pup Joint Oil Casing Collar
Henan Dongfanglong Machine Manufacture Co., Ltd , https://www.eastlongmachine.com