Diamond recovery method without wastewater discharge

Abstract

The invention discloses a diamond recovery method without wastewater discharge, and solves the problem that a great deal of waste gas and wastewater are discharged in the production process in the prior art. The diamond recovery method is characterized by comprising the following steps: under controlled pressure, introducing chlorine, and automatically raising the temperature to be 50 to 100 DEG Cto corrode metal; after a corrosion reaction is completed, filtering to obtain diamond and a filter liquor; after preserving the temperature of the filter liquor at the temperature of 50 to 100 DEG Cby using a heat source of the corrosion reaction to extract copper, carrying out cooling crystallization and filtration to obtain ferric chloride solid and a mother liquor; and using the mother liquor to replace water for cycle use. According to the technology, indissolvable gas is not generated, water is not generated, or water taken in acid liquor is not generated, so that the problem that a great deal of waste gas and wastewater is discharged does not exist.

Description

1. Technical Field [0001] The invention relates to a method for recovering diamond without waste water discharge, which is used to corrode and dissolve the metal bond in tools such as waste cutting, grinding and drilling with chlorine. 2. Background technology [0002] Diamond is the hardest substance naturally occurring in nature. It is widely used in geological drilling and cutting, grinding and drilling of hard and brittle materials such as marble. The rise of the synthetic diamond industry has brought about the rapid development of the stone processing industry. my country is a big country in the production and use of diamonds and diamond tools. It consumes a lot of diamonds every year and also produces a lot of diamond waste. In addition to the expensive diamond particles, diamond waste also contains some substances with high recycling value (such as tungsten carbide, copper, cobalt, nickel, etc.). Therefore, the recycling of diamond waste is very meaningful. [0003] Diamo...

AI Technical Summary

Problems solved by technology

The current method of recycling diamonds with chlorine gas and water produces a large amount of ferric chloride solution during the recycling process, which generally cannot be sold directly

If the pH is only adjusted to neutral and discharged, the environment will be polluted; if the treatment reaches the standard discharge, the cost will be too high; if it is evaporated, concentrated and crystallized to make ferric chloride solid, it can be temporarily stored and slowly sold or sent For long-distance customers or scattered customers, but the sales revenue is lower than the energy consumption of evaporation and concentration

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