Preparing technique for extracting molybdenum from chemical fertilizer catalyst

Abstract

The invention relates to a production technology of Molybdenum extraction and is a production technology of extracting Molybdenum from chemical fertilizer catalyst. The waste Molybdenum of raw material is introduced into a grinder, sulfur is discharged at 600 DEG C via a reverberatory furnace, the material is introduced into a leaching tank, then sodium hydroxide and a salt compound are added into the leaching tank for direct leaching. The water extract is introduced into a thick slurry pump and a plate and frame filter press, the residue is discharged, and the filtrate is introduced into a storage tank of crude liquor and is pumped into a neutralizing tank by pump. Due to adding a salt compound, Molybdenum can be completely precipitated when the filtrate is neutralized in the neutralizing tank by adding acid. The invention can not only promote the molybdenum yield, save the energy source, decrease the production cost, and but also decrease the fixed assets investment of the same production scale, save capital and promote the economic efficiency of enterprises.

Description

technical field [0001] The invention relates to a production process for extracting molybdenum, in particular to a production process for extracting molybdenum from fertilizer catalysts. Background technique [0002] At present, the process used in the molybdenum recovery production system is that the waste molybdenum raw materials enter the pulverizer, pass through the reverberatory roasting furnace, put sulfur at 600 °C, add caustic soda to the mixer, and roast the alkali fusion at 800 °C in the reverberatory furnace. Pulverizer, leaching bucket, thick slurry pump, plate and frame filter, discharge the filter residue, send the filtrate to the crude liquid storage tank, pump it into the neutralization bucket, add acid to neutralize to a certain pH, put it into the acid tank, and The pump is pumped into the ion exchanger. After absorbing molybdenum saturation, it is put into the liquid absorption tank. The desorption liquid is pumped into the ion exchanger by the pump to des...

AI Technical Summary

Problems solved by technology

The ion exchanger uses a special ion exchange resin, which is repeatedly neutralized in the neutralization barrel to increase the consumption of acid and alkali

The desorption tank of the desorption system and the desorption liquid delivery pump are complicated to operate, resulting in long process routes and large equipment investment

[0004] The disadvantages of this process are: long production line, large investment in equipment, low recovery rate of waste molybdenum, high cost, complicated operation and small production capacity