Floating method of tungsten tin minerals

A mineral, tungsten-tin technology, applied in flotation, solid separation, etc., can solve the problems of unsatisfactory recovery effect and low recovery rate of tungsten and tin, and achieve the effect of improving the recovery rate of ore dressing, small dosage and strong collection capacity

Active Publication Date: 2015-11-18
CNMC GUANGXI PGMA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tungsten-tin ore beneficiation often adopts the gravity separation method to select coarse-grained tungsten-tin, but for fine-grained tungsten-tin with a particle size of -0.074mm content of more than 90% or fine-grained tungsten-tin with a particle size of -0.010mm content of more than 40%, The recovery effect of the gravity separation method is not ideal, and the recovery rate of tungsten and tin is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An example of the flotation method of tungsten tin mineral of the present invention, comprises the steps:

[0028] 1. Mineral raw materials

[0029] Raw material grade WO 3 0.37%, Sn0.40%. Process mineralogical studies show that Sn mainly exists in fine-grained cassiterite, and its embedded particle size is relatively fine, -0.074mm particle size WO 3 The metal occupancy rate is 91%, and the tin metal occupancy rate is 90%.

[0030] 2. Flotation reagents and operating conditions:

[0031] First, after stirring and mixing the mineral sample, add pH adjuster sodium carbonate 1500g / t (pH=10), activator lead nitrate 150g / t, inhibitor water glass 1000g / t, sodium hexametaphosphate 600g / t, new The collector benzyl hydroxamic acid is 1000g / t, and the fine-grained and fine-grained cassiterite is flotated by one-coarse, four-fine, three-sweep flotation closed-circuit process to obtain a tungsten-tin mixed concentrate with a rate of 0.65% and a grade of WO. 3 45.68%, Sn49.42%...

Embodiment 2

[0033] Another example of the flotation method of tungsten tin mineral of the present invention, comprises the steps:

[0034] 1. Mineral raw materials

[0035] Raw material WO 3 Grade 1.43%, Sn grade 1.26%. Process mineralogical research shows that tungsten is mainly scheelite, tin is mainly cassiterite, and its embedded particle size is relatively fine, -0.074mm particle size WO 3 The metal occupancy rate is 89%, and the Sn metal occupancy rate is 92%.

[0036] 2. Flotation reagents and operating conditions:

[0037] First, after stirring and mixing the mineral sample, add pH adjuster sodium carbonate 1000g / t (pH=9), activator lead nitrate 100g / t, inhibitor water glass 600g / t, sodium hexametaphosphate 400g / t, new The collector benzyl hydroxamic acid is 500g / t, and the fine-grained and fine-grained cassiterite is flotated by the one-coarse, four-fine, four-sweep flotation closed-circuit process to obtain a concentrate rate of 2.28% and a grade of WO. 3 52.63%, Sn45.62%, ...

Embodiment 3

[0039] Another example of the flotation method of tungsten tin mineral of the present invention, comprises the steps:

[0040] 1. Mineral raw materials

[0041] Raw material grade WO 3 0.46%, Sn0.33%. Process mineralogical research shows that tungsten is mainly scheelite, tin is mainly cassiterite, and its embedded particle size is relatively fine, -0.074mm particle size WO 3 The metal occupancy rate is 86%, and the Sn metal occupancy rate is 93%.

[0042] 2. Flotation reagents and operating conditions:

[0043] First, after stirring and mixing the ore sample, add pH adjuster sodium carbonate 1200g / t (pH=9.5), activator lead nitrate 120g / t, inhibitor water glass 800g / t, sodium hexametaphosphate 400g / t, new The collector benzyl hydroxamic acid is 800g / t, and the fine-grained scheelite is flotated by one-coarse, four-fine, four-sweep flotation closed-circuit process, and the concentrate yield is 0.87%, and the grade is WO. 3 43.68%, Sn30.42%, recovery rate WO 3 82.73%, Sn ...

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Abstract

A floating method of tungsten tin minerals comprises the following steps that (1), after raw materials are evenly mixed, the pH is adjusted to be 9-10 through sodium carbonate; (2) lead nitrate is added for activating tungsten tin hard to float; (3), water glass and sodium hexametaphosphate are added for restraining floating of gangue impurity minerals; and (4), new collector benzyl hydroxyl oxime acid is added, and a mechanical stirring type floating machine is used for floating the tungsten tin. By the adoption of the method, tungsten concentrate and tin concentrate with the recycling rate higher than that of a common floating and gravity concentration technique of fatty acid and carboxylic acid collectors.

Description

technical field [0001] The invention relates to a flotation method for tungsten and tin minerals, especially for the tungsten tin which is difficult to be recovered by the gravity separation method and the conventional collector flotation, the collector benzyl hydroxamic acid is used for the flotation of the tungsten tin, which can increase the tungsten and tin. Tin concentrate grade and tungsten-tin recovery. Background technique [0002] Scheelite and cassiterite are the most common tungsten-tin minerals. They have a large specific gravity but are brittle. They are easy to be over-ground and crushed in the process of mining and sorting, which has a great impact on the beneficiation process and prevents over-grinding of tungsten-tin minerals. Over-grinding and separation of fine-grained tungsten and tin are recognized technical problems in the field of mineral processing in the world. Tungsten-tin ore beneficiation often uses gravity separation to select coarse-grained tun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018
Inventor 黄家贤王喜绍危流永刘子帅李宁钧兰健邱振忠
Owner CNMC GUANGXI PGMA
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