Beneficiation plant features:
1) The original two-stage closed-circuit crushing mine is changed into three-stage two-closed road process, which not only reduces the particle size of the final product of the crushed ore, but also balances the load of the medium and fine crushing equipment. This non-ferrous metals processing plant in the country was still a rare.
2) In the sorting process, the sulfur and oxygen in the lead flotation cycle are partially mixed and floated, so that the phase recovery rate of lead oxide is increased by more than 12%. In the zinc flotation cycle, zinc oxide is floated and floated directly. Zinc oxide concentrate.
3) Since the plant was put into production, the flotation column has been used to select lead sulphide ore. The production practice shows that the flotation column is used for rough selection and sweeping. The sorting effect is not much different from that of the 6A flotation machine, but the flotation column Compared with the 6A flotation machine, it has the advantages of high enrichment ratio and strong selectivity, and is suitable for treating ore with more mud, fine particle size and high flotation concentration. The plant has 10 sets of ¢2.2m and ¢2.5m flotation columns, and 5 sets are used. It is an indispensable equipment for rough selection of lead sulfide and zinc sulfide.
4) Concentrate dewatering adopts the folding belt filter instead of the original 20m2 external filter type cylinder filter, and adds the tapping and wiping device. The dewatering effect is remarkable, the treatment volume is increased by 1.5~3 times, and the filter cake moisture is reduced by 3~5%. .
5) Comprehensive recovery of useful metals such as silver and mercury . The ore contains 30~60g/t of silver and contains 80~100g/t of mercury. The silver and mercury are enriched in lead concentrate and zinc concentrate by micro-cyanide process and mixed medicine. The comprehensive recovery index is: lead concentrate contains 1300~1500g/t, the recovery rate is 50~60%, zinc concentrate contains 700~800g/t, and the recovery rate is 60~70%.
The process indicators, unit consumption indicators and main equipment of the concentrator are shown in the following table:
Food Machinery Precision Casting or food machinery investment casting, silica sol process. It is a casting process with little or no cutting.
Cast food machinery is an excellent process technology in the foundry industry. Its application is very extensive. Food machinery cast not only applies to the casting of various types and alloys, but also produces the dimensional accuracy of castings. The surface quality is higher than that of other casting methods, and even castings that are difficult to cast and which are difficult to cast have high temperature resistance and are not easily processed can be cast using investment casting.
In wax pattern process,we mix stearic acid and paraffin wax in wax pattern making,as you know,it is better than polyethylene,and the wax deformation is small.
In shell making,we adopt automatic sand-covering production line, which was invented under the guidance of our general manager.The indoor temperature was controlled by air-conditions,keeping the temperature at 24℃±1℃, which can make the castings much more stable,the internal tissues much more well-proportioned.
In shell hardening process,we use aluminium chloride to harden the shell.This can make the shell so hard that it can`t be distorted,at the same time the bug which the casting may have will be decreased.If there are letters or numbers in it,they will be much clearer.
In dewaxing process,about 95% of the castings suppliers adopt the original water dewaxing technics,but we using the advanced steam dewaxing technics,which we are very proud of. This can effectively avoid the air-hole and sand-hole, making the casting look much nicer.
In smelt process, we use middle frequency furnace, avoiding the emergence of the oxide; in molten steel control part, we use Germany-imported direct reading spectrometer machine, assuring its quality before the molten steel out of the furnace. During this process we use ERP production and management software to get the feedback information.
In shell-knock out process, we have special machines,which can decrease the hitting and knocking, easily made by manual shell knocking out.
In shot-blasting process, we have crawler-type and hanging shot-blasting machine, with steel shot 0.5-0.8, making the products smooth.Of course, if the customer wants it look much nicer, we also can carry out sand-blast treatment.
In heat treatment process, we use electric furnace, and adopt double-temperature control in order to heat the products equally. As a result, the products will have great metallurgical structure.
Our tolerance can reach at the grade of 5-7 according to our country`s tolerance standard.
In machining process,we have 12 CNC machining centers and some other machines, so we can make further machining if the customers need.
Precision Casting Of Food Machinery
Precision Casting Of Food Machinery,Investment Casts for Food Machinery,Food Machinery Investment Casts,Steel Casting for Food Machinery
Wei fang junlong precision casting Co.,Ltd , https://www.junlongcasting.com