Beneficiation of antimony ore

Antimony ore dressing material which can be used to provide an antimony smelting; As more types of minerals, antimony ore beneficiation various methods, such as hand-selected, reselection (including heavy medium beneficiation), flotation and flotation so isolated has been applied .

First, the pick of the ore

The hand selection of strontium ore is based on the difference in color and gloss shape of strontium-bearing minerals and gangue minerals in strontium ore. By means of the worker's eyesight, the method of hand picking on the belt for conveying ore is a primitive. beneficiation methods, but because of antimony minerals often has a massive collection of coarse crystals or crystal cluster produced, hand-selected to get a higher grade massive antimony ore, antimony suitable for metallurgical requirements, so some of the world's major producing countries are still antimony There are some hand-selected jobs.

Second, the re-election of antimony ore

Re-election is a method of sorting according to different minerals with different sedimentation or velocity in the medium flow, including jigging (vertical flow), shake dressing (slope flow) and centrifugal beneficiation (rotary flow) and weight Medium beneficiation, ie ore is sorted in a resuspension.

The density of the stibnite is 4.26 g/cm ³ , the density of the gangue is 2.6 to 2.65 g ∕ cm ³ , and the equal drop ratio is 2.19 to 2.26, which belongs to the easy-selected ore sorted by density. Huang Yuhua (5.2g∕cm ³ ), red antimony ore (7.5g∕m ³ ), Yuhua (5.57g/cm ³ ), and the ratio of equivalence to gangue are 2.55～2.63, 3.93～4.06 and 2.76～2.86, respectively. These three types of antimony ore are ore that are easily sorted by density. Only the ettringite density is 3.14g ∕cm ³ , and its equivalence ratio is only 1.29, which is a harder sorting ore.

Re-election costs are generally lower than flotation and can be used as a pre-selection process to remove large amounts of gangue before entering flotation. Due to the difficulty of flotation of yttrium oxide ore, it is still mainly re-election at this stage. Heavy media beneficiation is the re-election of the new technology, China's Guangxi CHANGPO processing plant and a tin mine Bureau of Mines plant were fled south to arsenic pyrite and ferrosilicon as the most important medium of antimony ore beneficiation straight medium to obtain better results.

Third, the flotation of antimony ore

Flotation is the main beneficiation method for obtaining powdered antimony concentrate, and flotation is included in almost all beneficiation processes. The types of ore used for treatment are: mono-sulfurized antimony ore, sulfurized-oxidized mixed antimony ore, tungsten-niobium-gold polymetallic sulfide ore, antimony-arsenic gold sulfide ore, tin, lead , antimony, zinc polymetallic sulfide ore, antimony, lead. , zinc, mercury polymetallic sulphide ore, arsenic, antimony, gold poly-gold sulfide ore, etc., now the tin ore single ore of the tin mine and the processing of tin, zinc, lead and antimony polymetallic ore in Guangxi Dachang as an example to illustrate a single Flotation process of antimony sulfide ore and antimony sulfide.

The ore dressing process of the tin mine south mine is the hand-selective-heavy medium selection-flotation process. The production indexes of the whole process and the flotation conditions used are listed in Tables 1 and 2.

Table 1 Example of production index of tin mine south plant (%)

Table 2 Flotation conditions of tin mine south selection plant

The beneficiation of tin, lead, antimony and zinc polymetallic ore in Guangxi Dachang uses heavy medium-re-election-flotation-re-election process.

Guangxi Dachang Polymetallic Tin Mine is a very complex cassiterite-sulphide ore, of which more than 10 kinds of minerals have industrial significance. The selected process flow is to first select 40% to 60% of the waste rock in the hydrocyclone in the hydrocyclone, and the heavy product enters the pre-stage re-election to obtain the mixed concentrate (cassiterite and sulfide), and then Flotation of sulfur, the product in the tank enters the rear section and re-elected, and the tin concentrate is obtained; the middle ore and the slime in the previous section are fully floated and desulfurized, and the shale tin concentrate is re-selected; the fully flotation sulfide ore enters no Cyanide flotation separation system, producing lead-bismuth mixed concentrate, zinc concentrate and arsenic concentrate. Lead and bismuth mixed concentrate can be sorted into brittle bismuth lead ore (can only be treated by metallurgical method) and arsenic pyrite (selected as heavy medium weighting agent). The conditions and production indicators of the cyanide-free flotation process of the mine are listed in Table 3.

Table 3 First cyan flotation conditions and production indicators of the Changchang Slope Plant

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