Pure tin block 230-269 yuan/kg
Environmental protection tin block 224-268 yuan/kg
Environmental protection tin slag 200-251 yuan/kg
Silver-containing tin block 320-380 yuan/kg
Lead-containing tin block 110-192 yuan/kg
Lead-containing tin slag 110-178 yuan/ kg
More tin bars : lxhsxcj Tin dross itself has a high tin content, but it is difficult to be reused because of the production of refractory Sn-Cu alloy. The production of tin slag has its inevitability and regularity, in the production operation to pay attention to all aspects of the procedure is to minimize it.
Wave soldering when the solder is in a molten state, its surface oxidation and its role with other metal elements (mainly Cu) to generate some residue is unavoidable, but the reasonable and correct use of wave soldering equipment and timely cleanup to reduce the slag is also critical.
1, tin slag directly sold, that is, when the waste disposal:
The most simple, the most trouble-free, but also the most wasteful way to deal with, you can contact a professional tin slag recycling company to deal with.
2, directly with the manufacturer to exchange tin bars:
Most of the benefits to the exchange of tin bars to the manufacturer. In the storage or transportation process if you are not careful to mix leaded and unleaded together, the price difference is far, the exchange rate is naturally very low!
3, the use of tin slag reduction machine:
Tin slag reduction machine is a relatively simple device. Mostly heating melts the solder into a liquid, using gravity to separate the liquid solder from the oxide. And the oxides are not melted. Due to the use of physical reduction method, the oxidized tin slag is not possible to be reduced out of tin, we see the so-called reduced out of tin, but only in the dregs of tin slag in the fight mixed in the pure tin only, high temperature, pressure and reduction machine in the working condition of the friction, but in the fight in the dregs of tin slag in the mix in which the pure tin oxidized again. It takes up space, requires special personnel to operate, consumes electricity, is noisy, and the process of salvaging, transporting, storing, and reducing is complicated, which increases the management cost. In the case of the reduction rate itself is not high, minus the equipment space rent + storage space rent + staff wages + electricity costs + equipment investment, etc., it is better to exchange tin directly with the manufacturer!
Common sense: any oxide can only be reduced by ionic or atomic replacement, which is a chemical replacement reaction. It is not possible to perform a reduction reaction by physical reduction.
4, the use of antioxidant oil or antioxidant:
Use it to cover the surface of the molten metal, so that it is isolated from the air to reduce oxidation. Tin slag is mainly in the beat up the wave of tin back into the tin cylinder when the production, and tin slag covered in the surface of the molten tin as well as can be insulated from the air to reduce the production of tin slag! It is better to use it than not to use it!
5, reducing powder or reducing agent:
Most of the inorganic metal salts, the vast majority of the metal has a certain degree of corrosiveness. Smoke, odor, dust, or with sparks, may cause open fire, or may block the nozzle, to the equipment maintenance to bring some difficulties. Because of its conductivity, once accidentally stained to the PCB board is difficult to clean off, and will affect the electrical performance of the product and the reliability of the solder joints!