Skarn-Type Tungsten Ore Flotation Separation Affected by Four Factors
Shandong Xinhai Mining Technology & Equipment Inc.
Xinhai provides ore processing plant and full set equipment: Ball mill, Hydrocyclone, Flotation, Washing plant, CIP, CIL
Skarn-type tungsten ore accounts for 40% of China's proven reserves. Its ore body is lens-like, layered, and complex in shape. Common minerals in the ore include scheelite, wolframite, cassiterite, molybdenite, yellow tungsten Copper, galena, sphalerite, siderite, arsenopyrite, pyrrhotite, magnetite and fluorspar, etc. The ore grades of different deposits vary greatly, and the scale varies greatly. Flotation recovery of skarn-type tungsten ore often has problems such as difficult recovery and separation, poor recovery effect, etc. This article will discuss the four major factors affecting the recovery of skarn-type tungsten ore, and teach you how to solve the flotation problems of skarn-type tungsten ore.
PH value is an important factor affecting the flotation of skarn-type tungsten ore, especially when there are many associated calcium-containing minerals, common associated calcium-containing minerals
To solve this problem, caustic soda, lime, and sodium carbonate can be used as regulators to adjust the slurry to a suitable pH value
In the flotation of skarn-type tungsten ore, water glass and tannin extract are often used as the main inhibitors, and water glass mainly inhibits silicon, fluorite and calcite, etc. And carbonate need to be suppressed by adding sodium hexametaphosphate, tannin extract, etc. The amount of inhibitor has a great influence on the inhibitory effect of calcium-containing minerals.
Insufficient dosage of inhibitors will lead to incomplete desorption of collectors on the surface of gangue minerals, which will affect the separation effect, and excessive dosage will inhibit the recovery of tungsten minerals. In actual production, the amount of inhibitor should be determined through targeted flotation tests.
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Since the selected ore has many associated minerals, and some of them are close to the flotation properties of tungsten ore, the appropriate type and amount of collector are particularly critical.
Oxidized paraffin soap is a traditional skarn-type tungsten ore collector, which has good selectivity to tungsten minerals, but its collection capacity is weak. Oleic acid has a good ability to collect tungsten minerals, but at the same time it will also cause the floating of calcium-containing gangue minerals. In order to obtain qualified products, a combination of collectors such as oxidized paraffin soap, oleic acid, and fatty acid sodium salt is often selected in the selection of collectors to ensure the recovery effect while avoiding the floating of associated minerals. The determination of its dosage needs to be determined according to the composition of the ore deposit.
Before the beneficiation operation, the process of selectively desorbing the collector on the surface of gangue minerals is required, that is, the process of adding inhibitors to stir the pulp. In this stage, the agitation time, agitation speed and pulp concentration will have an impact on the beneficiation effect.
If the stirring time is short, the collector will not completely desorb the collector on the surface of the gangue minerals, and the formation of flocs will not be perfect, which will lead to low recovery rate and grade, and the recovery effect of fine-grained tungsten minerals is not good. A long time will cause the collector on the surface of the tungsten mineral to be desorbed, which will also lead to a decrease in recovery. The stirring speed mainly affects the formation of flocs in the pulp and the recovery of fine-grained tungsten minerals in the pulp. The concentration of agitated pulp mainly affects the binding ability of flotation reagents and minerals. Generally, the concentration of pulp is within a certain range, and the binding capacity of reagents and minerals reaches the peak. Due to the differences in the properties of different deposits, these three factors must be determined by flotation tests to determine the specific parameters.
We have introduced the four factors that affect the flotation of skarn-type tungsten ore. In actual production, each deposit varies greatly and the recovery conditions are different. Mineral dressing tests should be carried out in a targeted manner according to the composition and properties of the deposit. Carry out comprehensive recycling under certain conditions to avoid economic loss and waste of resources.