mining flotation process, mineral flotation, mining flotation equipment, ore flotation technology

1Based on 20 years of experience in mineral processing industry, Xinhai has been committed to the development and innovation of froth flotation, aiming at providing professional flotation device and comprehensive service, including from previous beneficiation test analysis, middle flotation process design and equipment selection, and later installation and debugging. Currently, Xinhai has provided the advanced professional Xinhai flotation system for many mineral processing projects at home and abroad.

Case

Flotation Equipment

Flotation Process

Introduction:

Flotation separation process is one of the most widely mineral processing method used in the production. It uses the difference of physical and chemical properties in mineral surface, and rely on air bubbles buoyancy in the pulp to realize mineral separation process. On the basis of this process, Xinhai has developed a series of flotation reagents, which not only reduce 10% reagent consumption, but also increase 20% flotation efficiency.

Application:

Xinhai flotation process can be widely used in non-ferrous metal, ferrous metal and nonmetal minerals, especially used in roughing and scavenging of large and medium-sized flotation plant. It can process non-ferrous metals, such as gold, silver, copper, iron, tungsten, lead, zinc, tin, molybdenum, nickel, tantalum, niobium and manganese ore; and also process nonmetal minerals, such as fluorite, talc, etc.

A key factor of flotation index——Flotation Reagents

01
Collectors
- Strengthening mineral hydrophobic, floatability and adsorbability
- Such as: xanthate and aerofloat
02
Regulator
- Promote or inhibit mineral buoyancy; Adjust pulp PH and ion composition
- Such as: inhibitor, activator and acid-base regulator
03
Frother
- Promote pulp form stable foam
- Such as: pine oil, cresol, fatty alcohol

Compared with common flotation reagents, Xinhai special flotation reagents not only enhances the mineral surface hydrophobicity, mineral adhesive fastness and selectivity on the bubble, but also improves more 25% mineral flotation speed, which plays a very important role in separation efficiency and flotation index.

Case -- 2016.11.11 Iran 300tpd Gold Floatation Project

01 Beneficiation Test

In May 2016, Iranian client commissioned Xinhai Mine Research Institute to conduct beneficiation test after collected 50kg samples in the site. After tested the ore properties of sample ore, Xinhai lab concluded that the ore was gold-bearing quartz vein deposit, the metal mineral were pyrite, limonite and natural gold. The ore grade is 5.61g/t.

Xinhai mineral processing plan: After finished the test in July, Xinhai Mine Research Institute carried on the preliminary exploration of its processing conditions. After compared flotation with cyanide leaching process, Xinhaia Mine Research Institute found that the gold recovery rate in flotation process was far higher than in cyanide leaching process. Therefore, after consulting with the client, Xinhai decided to adopt two-stage closed circuit crushing, one-stage grinding and single flotation process to get the gold concentrate. After the grinding, then one roughing, three scavenging, three concentration, the process got 87.16% recovery rate of gold concentrate.

Flotation Equipment Selection:

According to the beneficiation test and process requirements, Iran 300tpd gold floatation project needs the following flotation equipment model:

Equipment Name	Type	Unit Quantity	Power (KW)	Voltage (V)
Flotation cell	SF-8	3	3*30	380
Flotation cell	JJF-8	7	7*22	380
Flotation cell	SF-4	3	3*15	380
Flotation cell	JJF-4	9	9*11	380
Flotation cell	SF-2.8	33	33*11	380

02 Mine Design

In August 2016, Xinhai sent professional engineers to the site to learn about the mineral resources and construction conditions. Considered its location, mineral characteristics, the project needs to solve the following problems:

1) The project was located in the Iranian plateau, which was about 2,000 meters above sea level. The weather was cold in the winter, which needed to take into consideration;

2) The investment fund was limited, so the project needed to be completed as soon as possible.

After many experiments and technical discussions, Xinhai technical engineers put forward reasonable solutions:

1) Adopted reasonable and compact layout. Makes full use of the high difference to complete self-flow layout in the workshop design, meanwhile, makes the industrial plants as compact and warm as possible, which is easy to produce in winter.

2) Optimized flotation process, improved efficiency. According to ore characteristics, Xinhai timely controlled the dosage of flotation reagents, especially the dosage of xanthate, strictly controlled concentration density, and greatly improved the gold concentrate grade. At the same time, in order to complete the project construction fast and efficient, Xinhai personnel decisively abandoned home holiday arrangement, worked hard in the first line, so completed the construction of plant workshop 15 days in advance.

03 Equipment Manufacturing

Xinhai production plant was producing flotation equipment of this project.The flotation equipment of this project was finished in Xinhai manufacturing plant, and was prepared for packaging.

04 Installation and Commissioning, Worker Training

After manufactured and purchased equipment, Xinhai installation and commissioning technicians started equipment installation and commissioning.

To help Iranian workers to operate as soon as possible, Xinhai technicians showed on-site training for plant workers, explained equipment operation notes, helped customers quickly establish own technical team, laid foundation for later stable operation.

05 Designed Capacity Reached

In Iran 300 tpd gold flotation project, the ore grade was 5.61 g/t, gold concentrate grade was 78.85 g/t, flotation recovery rate was as high as 87.16%, the final recovery rate was up to 87.16%,the customers gave high praise for these results. From the beneficiation test, mine design, equipment manufacture, installation and debugging to the worker training and standard reached, Xinhai provided a series of flotation process service.