CN-119076229-B - Cassiterite collecting agent and mineral separation method of associated cassiterite lithium-containing peganite

CN119076229BCN 119076229 BCN119076229 BCN 119076229BCN-119076229-B

Abstract

The application provides a cassiterite collector and a mineral separation method of associated cassiterite lithium-containing peganite, and relates to the technical field of mineral separation. The cassiterite collecting agent provided by the application has good selectivity and weak spodumene collecting capability, and can be used for pre-separating fluorite, calcite, apatite, amphibole and other gangue minerals with better floatability, so that the difficulty in subsequent spodumene flotation is reduced, and the quality of spodumene concentrate is improved. According to the beneficiation method of the cassiterite collector, cassiterite is subjected to flotation enrichment before spodumene flotation, fluorite, calcite, apatite, amphibole and other easy-to-float gangue minerals affecting the grade of spodumene concentrate are simultaneously removed, and cassiterite is purified by adopting a reselection method, so that cassiterite concentrate is obtained, and the recovery of cassiterite in pesium type ores is realized. Impurities affecting the quality of spodumene concentrate are removed in advance, the quality and recovery rate of spodumene concentrate are improved, and economic benefits are greatly improved.

Inventors

SUN ZHIJIAN
YE YUEHUA
HU ZHIQIANG
YU ZHICHAO
WAN LI
LIU WANFENG
CHEN XUBO
WANG LIGANG
ZHU YANGGE
WU GUIYE
YU YANG

Assignees

矿冶科技集团有限公司

Dates

Publication Date: 20260508
Application Date: 20241012

Claims (8)

1. A mineral separation method of associated cassiterite lithium-containing peganite is characterized by comprising, by mass, 30% -50% of a cassiterite collector, 8% -15% of a second component, 5% -10% of a third component, 0.5% -1% of a fourth component and 20% -40% of a fifth component; The first component is sodium fatty acid with the carbon chain length of 14-22, the second component is sodium petroleum sulfonate and/or sodium dodecyl benzene sulfonate, the third component is naphthenic acid, the fourth component is one or two of sodium polyoxyethylene ether sulfate and/or sodium dodecyl sulfate, and the fifth component is water; The beneficiation method comprises the following steps: grinding the cassiterite-containing lithium peganite raw ore to obtain ore pulp, wherein the pH value of the ore pulp is 8-10; adding the cassiterite collector into the ore pulp for cassiterite flotation to obtain cassiterite rough concentrate and cassiterite flotation tailings; adding sodium carbonate into the cassiterite rough concentrate to carry out cassiterite concentration, so as to obtain cassiterite concentration foam and cassiterite concentration tailings; Reselecting the cassiterite carefully-selected foam to obtain tin concentrate; And performing spodumene flotation on the cassiterite flotation tailings to obtain spodumene concentrate.
2. The method for beneficiation of associated cassiterite lithium-containing pegmatite according to claim 1, characterized in that the cassiterite flotation tailings are subjected to flotation, comprising: stirring and pulping the cassiterite flotation tailings, sodium hydroxide and sodium carbonate, adding spodumene activator and spodumene collector, mixing, and performing lithium roughing to obtain lithium flotation foam and lithium flotation underflow; mixing the lithium flotation froth with sodium carbonate, and then carrying out lithium concentration for 3 times to obtain spodumene concentrate and lithium concentration tailings; And mixing the lithium floatation underflow with a spodumene activator and a spodumene collector, and then performing lithium scavenging for 1-2 times to obtain scavenging foam and scavenging tailings.
3. The method for beneficiation of associated cassiterite lithium-containing pegmatite according to claim 1, characterized in that at least one of the following conditions is satisfied: a. The mass percentage content of Sn in the cassiterite-containing lithium-containing pegmatite is 0.02-0.3%; b. The ore grinding and screening method comprises the steps of grinding ore particles with the particle size smaller than or equal to 2mm; c. the fineness of the solid materials in the ore pulp is below 0.074mm and accounts for 50% -80%; d. the concentration of the ore pulp is 30-35%; e. sodium carbonate is added in the ore grinding process; f. The dosage of the sodium carbonate is 500-2000 g/t of raw ore.
4. The method for beneficiation of associated cassiterite lithium-containing pegmatite according to claim 1, characterized in that at least one of the following conditions is satisfied: a. the cassiterite collector is prepared into an aqueous solution with the mass fraction of 5-15%; b. the consumption of the cassiterite collector is 100-800g/t of raw ore; c. The cassiterite floatation time is 3-5min; d. the consumption of sodium carbonate in each cassiterite refining is 100-500g/t of raw ore; e. The cassiterite is selected for 1-2 times.
5. The method for beneficiation of associated cassiterite lithium-containing peganite according to claim 1, wherein the reselection comprises spiral chute reselection and shaker reselection, the reselection comprising: Adding the cassiterite carefully chosen foam into a spiral chute for first reselection to obtain spiral chute concentrate and spiral chute tailings; Adding the spiral chute concentrate into a shaking table for secondary reselection to obtain the tin concentrate; The second reselection comprises: Adding the spiral chute concentrate into a first shaking table for first shaking table reselection to obtain first shaking table concentrate, first shaking table middlings and first shaking table tailings; and adding the first shaking table concentrate into a second shaking table to perform second shaking table reselection to obtain the tin concentrate.
6. The method for beneficiation of associated cassiterite lithium-containing pegmatite according to claim 2, characterized in that at least one of the following conditions is satisfied: a. The stirring time of the stirring and size mixing is 5-30min, and the linear speed of the stirring impeller is 5.5-7.5m/s; b. in the lithium roughing step, the dosage of sodium hydroxide is 100-200g/t of raw ore; c. in the lithium roughing step, the dosage of sodium carbonate is 200-300g/t of raw ore; d. in the rough concentration step of the lithium, the dosage of the spodumene activator is 100-400g/t of raw ore; e. the spodumene collector is one or more of oleic acid, sodium oleate, oxidized paraffin soap, naphthenic acid and naphthenate soap; f. The spodumene activator is one or two of calcium chloride and magnesium chloride; g. The rough concentration time of the lithium is 3-5min; h. the consumption of the spodumene collector in the rough concentration step is 500-2000g/t of raw ore.
7. The method for beneficiation of associated cassiterite lithium-containing pegmatite according to claim 2, characterized in that at least one of the following conditions is satisfied: a. the dosage of sodium carbonate in the 1 st lithium concentration step is 100-600g/t of raw ore; b. the dosage of sodium carbonate in the step of selecting the 2 nd lithium is 100-400g/t of raw ore; c. the dosage of sodium carbonate in the 3 rd lithium concentration step is 100-300g/t of raw ore.
8. The beneficiation method of associated cassiterite lithium-containing peganite according to claim 2, wherein the number of lithium sweeps is 2, satisfying at least one of the following conditions: a. the consumption of spodumene collector in the 1 st lithium scavenging step is 100-500g/t of raw ore; b. The spodumene collector dosage in the 2 nd lithium scavenging step is 50-200g/t of raw ore.

Description

Cassiterite collecting agent and mineral separation method of associated cassiterite lithium-containing peganite Technical Field The application relates to the technical field of mineral separation, in particular to a cassiterite collecting agent and a mineral separation method of associated cassiterite lithium-containing pegmatite. Background At present, coarse-grain cassiterite is generally recovered by adopting a gravity separation method, and fine-grain cassiterite is generally recovered by adopting a gravity separation method after flotation. The flotation method generally needs to add inhibitors such as sodium silicate, sodium fluosilicate and the like, then add metal cation activators such as lead nitrate and the like, and then adopt anionic flotation for collecting cassiterite such as oleic acid, arsinic acid, phosphonic acid and hydroxamic acid, or adopt a collector such as alkyl sulfonated succinic acid and the like for flotation for collecting cassiterite at a lower pH value. At present, two methods for recovering the cassiterite in the associated cassiterite-containing lithium peganite are adopted, one method is to recover the cassiterite in a mode of gravity separation before the spodumene flotation, more gravity separation equipment is needed, equipment investment is high, the equipment is not easy to manage, more flushing water is needed to be added in the gravity separation process to influence the stability of the subsequent spodumene flotation operation, and the other method is to recover the cassiterite in a gravity separation concentrate, because a large amount of spodumene collecting agent remains in the spodumene concentrate, the spodumene and the cassiterite are aggregated due to the bridging effect of the collecting agent, and the like, the table flotation is easy to form in the gravity separation process, so that the recovery rate of the cassiterite and the concentrate quality are influenced. If the traditional method is adopted for flotation and recovery of the cassiterite, the cassiterite can be recovered only by flotation before spodumene flotation, but inhibitors, activators and collectors added in the conventional cassiterite flotation process have different degrees of influence on spodumene flotation. In addition, because a large amount of collecting agents are added during spodumene flotation, the easily-floating gangue is easily collected into spodumene concentrate, so that the quality of the spodumene concentrate is affected. Disclosure of Invention The application aims to provide a cassiterite collecting agent and a mineral separation method of associated cassiterite lithium-containing peganite, and aims to solve the problems. In order to achieve the above object, the present application provides a cassiterite collector comprising a first component, a second component, a third component, a fourth component and a fifth component; the first component is sodium fatty acid, the carbon chain length of the sodium fatty acid is 14-22, the second component is sodium petroleum sulfonate and/or sodium dodecyl benzene sulfonate, the third component is naphthenic acid, the fourth component is one or two of sodium polyoxyethylene ether sulfate and/or sodium dodecyl sulfate, and the fifth component is water. In some embodiments, the cassiterite collector comprises, by mass, 30% -50% of a first component, 8% -15% of a second component, 5% -10% of a third component, 0.5% -1% of a fourth component and 20% -40% of a fifth component. The application also provides a beneficiation method of the associated cassiterite lithium-containing peganite, which uses the cassiterite collector and comprises the following steps: grinding the cassiterite-containing lithium peganite raw ore to obtain ore pulp, wherein the pH value of the ore pulp is 8-10; adding the cassiterite collector into the ore pulp for cassiterite flotation to obtain cassiterite rough concentrate and cassiterite flotation tailings; adding sodium carbonate into the cassiterite rough concentrate to carry out cassiterite concentration, so as to obtain cassiterite concentration foam and cassiterite concentration tailings; Reselecting the cassiterite carefully-selected foam to obtain tin concentrate; And performing spodumene flotation on the cassiterite flotation tailings to obtain spodumene concentrate. In some embodiments, subjecting the cassiterite flotation tailings to spodumene flotation comprises: stirring and pulping the cassiterite flotation tailings, sodium hydroxide and sodium carbonate, adding spodumene activator and spodumene collector, mixing, and performing lithium roughing to obtain lithium flotation foam and lithium flotation underflow; mixing the lithium flotation froth with sodium carbonate, and then carrying out lithium concentration for 3 times to obtain spodumene concentrate and lithium concentration tailings; And mixing the lithium floatation underflow with a spodumene activator and a spodumene collector, and then per