Application of L-cysteine and L-cysteine salt in metal sulfide mineral flotation separation

Abstract

The invention discloses application of L-cysteine and L-cysteine salt in metal sulfide mineral flotation separation. L-cysteine and / or L-cysteine salt are / is used as non-molybdenum sulphide mineral inhibitors to be applied to flotation separation of sulphur molybdenum and non-molybdenum sulfide mineral; and the molecular structure of L-cysteine simultaneously contains three kinds of functional groups comprising sulfydryl, amidogen and carboxyl, wherein sulfydryl and amidogen are solid-philic groups and can be combined with metal ions to generate stable pentacyclic chelate, and carboxyl is a hydrophilic group mainly. The L-cysteine is mainly used as a non-molybdenum sulfide mineral surface modification activator, can enhance the hydrophilia of the surface of the sulfide mineral with the natural hydrophobicity, particularly can effectively enhance the hydrophilia of the surface of the non-molybdenum sulphide mineral such as copper pyrites, chalcocite, galena, blende, iron pyrite and bismuth sulfide ore, restrains upward flotation of the non-molybdenum sulphide mineral, and achieves efficient flotation separation of the sulphur molybdenum and the non-molybdenum sulfide mineral.

Description

technical field

[0001] The present invention relates to a kind of application method of L-cysteine ​​and its salt, especially a kind of L-cysteine ​​and its salt containing hydrophilic and solid-philic groups at the same time as non-molybdenum sulfide mineral surface modifier in The application in the flotation separation of sulfide minerals belongs to the field of mineral processing mineral flotation separation technology. Background technique

[0002] L-cysteine ​​hydrochloride monohydrate (L-Cysteine ​​hydrochloride monohydrate, detection of L-cysteine, L-cysteine) is an amino acid with physiological functions, the only one among more than 20 amino acids that make up proteins Amino acids with reducing sulfhydryl groups (-SH). Cysteine ​​is widely used in the food industry, cosmetics, and pharmaceutical industries. In the food industry, it is mainly used to prevent food browning, as an antioxidant and stabilizer for certain substances; because the sulfhydryl group of cys...

Examples

Embodiment 1

[0033] Using L-cysteine ​​and sodium sulfide as inhibitors, a comparison test of flotation separation was carried out on copper-molybdenum mixed flotation rough concentrate in a certain mine in Henan. Put the copper-molybdenum mixed concentrate in a 1.5L flotation tank, adjust the pulp concentration to about 35%, use 20g / t of L-cysteine ​​for roughing, and stir for 5 minutes, then inflate for 0.5 minutes, and float The time is 6 minutes. In selection one, the pulp is transferred to a 0.5L flotation tank, the dosage of inhibition is 10g / t, the stirring time is 2 minutes, and the flotation time is 6 minutes. Concentration 2, transfer the concentrate of the selection 1 to a 0.2L flotation tank, the dosage of inhibitor is 10g / t, the stirring time is 2 minutes, and the flotation time is 4 minutes. The test flow chart is as Figure 6 , and the results are shown in Table 1. It can be seen from Table 1 that under the same dosage, when cysteine ​​is used as the copper-molybdenum sep...

Embodiment 2

[0038]Using sodium L-cysteine ​​as an inhibitor, the flotation separation test of mixed copper-molybdenum rough concentrate in a mine in Henan was carried out. Put the copper-molybdenum mixed concentrate in a 1.5L flotation tank, adjust the pulp concentration to about 30%, use 10g / t of roughing L-cysteine, and stir for 5 minutes, then inflate for 0.5 minutes, and float The time is 6 minutes. Selection 1, transfer the ore pulp to a 0.5L flotation tank, the inhibition dosage is 5g / t, the stirring time is 2 minutes, and the flotation time is 6 minutes. Concentration 2, transfer the concentrate of the selection 1 to a 0.2L flotation tank, the dosage of inhibitor is 5g / t, the stirring time is 2 minutes, and the flotation time is 4 minutes. Its test procedure is as follows Figure 6 As shown, the results are shown in Table 2. It can be seen from Table 2 that when sodium L-cysteine ​​is used as the copper-molybdenum separation inhibitor, the molybdenum grade and copper grade in th...

Embodiment 3

[0043] Using L-cysteine ​​as an inhibitor, the flotation separation experiment was carried out on the mixed lead-molybdenum rough concentrate in a mine in Henan. Put the copper-molybdenum mixed concentrate in a 3.0L flotation tank, adjust the pulp concentration to about 30%, use 25g / t of L-cysteine ​​for roughing, and stir for 5 minutes, then inflate for 0.5 minutes, and float The time is 6 minutes. Selection 1, the pulp is transferred to a 1.5L flotation tank, the dosage of inhibition is 5g / t, the stirring time is 4 minutes, and the flotation time is 6 minutes. Concentration 2: transfer the concentrate of the selection 1 to a 0.5L flotation tank, the dosage of inhibitor is 5g / t, the stirring time is 4 minutes, and the flotation time is 4 minutes. Concentration 3: put the secondary concentrate in a 0.5L flotation tank with an inhibitor dosage of 5g / t, stirring time of 4 minutes, and flotation time of 4 minutes. Its test procedure is as follows Figure 7 As shown, the result...

technical field

[0001] The present invention relates to a kind of application method of L-cysteine ​​and its salt, especially a kind of L-cysteine ​​and its salt containing hydrophilic and solid-philic groups at the same time as non-molybdenum sulfide mineral surface modifier in The application in the flotation separation of sulfide minerals belongs to the field of mineral processing mineral flotation separation technology. Background technique

[0002] L-cysteine ​​hydrochloride monohydrate (L-Cysteine ​​hydrochloride monohydrate, detection of L-cysteine, L-cysteine) is an amino acid with physiological functions, the only one among more than 20 amino acids that make up proteins Amino acids with reducing sulfhydryl groups (-SH). Cysteine ​​is widely used in the food industry, cosmetics, and pharmaceutical industries. In the food industry, it is mainly used to prevent food browning, as an antioxidant and stabilizer for certain substances; because the sulfhydryl group of cys...

Examples

Embodiment 1

[0033] Using L-cysteine ​​and sodium sulfide as inhibitors, a comparison test of flotation separation was carried out on copper-molybdenum mixed flotation rough concentrate in a certain mine in Henan. Put the copper-molybdenum mixed concentrate in a 1.5L flotation tank, adjust the pulp concentration to about 35%, use 20g / t of L-cysteine ​​for roughing, and stir for 5 minutes, then inflate for 0.5 minutes, and float The time is 6 minutes. In selection one, the pulp is transferred to a 0.5L flotation tank, the dosage of inhibition is 10g / t, the stirring time is 2 minutes, and the flotation time is 6 minutes. Concentration 2, transfer the concentrate of the selection 1 to a 0.2L flotation tank, the dosage of inhibitor is 10g / t, the stirring time is 2 minutes, and the flotation time is 4 minutes. The test flow chart is as Figure 6 , and the results are shown in Table 1. It can be seen from Table 1 that under the same dosage, when cysteine ​​is used as the copper-molybdenum sep...

Embodiment 2

[0038]Using sodium L-cysteine ​​as an inhibitor, the flotation separation test of mixed copper-molybdenum rough concentrate in a mine in Henan was carried out. Put the copper-molybdenum mixed concentrate in a 1.5L flotation tank, adjust the pulp concentration to about 30%, use 10g / t of roughing L-cysteine, and stir for 5 minutes, then inflate for 0.5 minutes, and float The time is 6 minutes. Selection 1, transfer the ore pulp to a 0.5L flotation tank, the inhibition dosage is 5g / t, the stirring time is 2 minutes, and the flotation time is 6 minutes. Concentration 2, transfer the concentrate of the selection 1 to a 0.2L flotation tank, the dosage of inhibitor is 5g / t, the stirring time is 2 minutes, and the flotation time is 4 minutes. Its test procedure is as follows Figure 6 As shown, the results are shown in Table 2. It can be seen from Table 2 that when sodium L-cysteine ​​is used as the copper-molybdenum separation inhibitor, the molybdenum grade and copper grade in th...

Embodiment 3

[0043] Using L-cysteine ​​as an inhibitor, the flotation separation experiment was carried out on the mixed lead-molybdenum rough concentrate in a mine in Henan. Put the copper-molybdenum mixed concentrate in a 3.0L flotation tank, adjust the pulp concentration to about 30%, use 25g / t of L-cysteine ​​for roughing, and stir for 5 minutes, then inflate for 0.5 minutes, and float The time is 6 minutes. Selection 1, the pulp is transferred to a 1.5L flotation tank, the dosage of inhibition is 5g / t, the stirring time is 4 minutes, and the flotation time is 6 minutes. Concentration 2: transfer the concentrate of the selection 1 to a 0.5L flotation tank, the dosage of inhibitor is 5g / t, the stirring time is 4 minutes, and the flotation time is 4 minutes. Concentration 3: put the secondary concentrate in a 0.5L flotation tank with an inhibitor dosage of 5g / t, stirring time of 4 minutes, and flotation time of 4 minutes. Its test procedure is as follows Figure 7 As shown, the result...

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