Phosphate mineral resources associated with the recovery of fluoride production of hydrogen fluoride

Fluosilicic acid, a by-product of the phosphate fertilizer plant, is currently used in very few fields and is mainly used to produce less than 10 products such as sodium fluorosilicate, cryolite, and aluminum fluoride. The introduction of foreign technology by Guizhou Hongfu Company and the production of anhydrous hydrogen fluoride from the by-production of fluorosilicic acid from the phosphate fertilizer plant has made great progress. Hongfu Company is currently constructing an industrialized plant that produces 20,000 tons/year of fluorosilicic acid to produce anhydrous hydrogen fluoride. After the project is completed, Hongfu will become the first company in the world to recover fluorine resources and process high-grade fluorine chemical products from the phosphorus chemical production process. This opens up new ways for the comprehensive utilization of fluorosilicic acid in the phosphate fertilizer industry. It not only can greatly increase the added value of products, but also can turn waste into treasure, partially replacing China’s precious fluorite resources, and will also open up new products for fluorosilicic acid by-products. Industry chain.
In addition, Yuntianhua International Chemical Co., Ltd. Furui Company is currently conducting technical research on the efficiency of fluorine-enriched absorption, and developing technology to recover anhydrous fluorine produced by phosphor production associated with phosphate mining, in order to achieve the comprehensive development and utilization of fluorine resources.

CNC Turning

What is CNC Turning

In CNC turning, a chuck (or specialized clamp) holds bars of material and, as they are rotated, a tool is fed to the piece to remove material to create a specific shape. A turret, which holds a group of tools, is programmed to move along the work piece in three different axes of motion to shape the material according to the assigned specifications.

Since CNC turning involves removing material from a work piece, it`s considered a [subtraction machining" process. It is done on a lathe machine, which can be used on all types of material, from wood to metal to plastic. It can also be done on a mill or a drill press.

Turning is primarily used to create cylindrical parts. It can be completed on the outside or the inside of a work piece, which is known as boring. The process can also be used to conduct various other operations, including:

· Grooving: Cuts grooves or creates narrow cavities in work pieces.

· Taper turning: Creates a gradually decreasing diameter in a cylindrical shape.

· Drilling: Produces round holes, which are typically for screws and bolts.

· Facing: Cuts a flat surface perpendicular to the axes of the milling cutter.

· Parting: Separates one part of the work piece from another.

· Knurling: Creates vertical, horizontal or crossing lines on the work piece.

· Threading: Makes grooves that can be screwed into other objects.

CNC Turning process

l Creating a digital representation of the part in CAD

l Creating the machining code from the CAD files

l CNC lathe setup

l Manufacturing of the turned parts

Capabilities

	Typical	Feasible
Shapes:	Thin-walled: Cylindrical Solid: Cylindrical
Part size:	Diameter: 0.02 - 80 in
Materials:	Metals Alloy Steel Carbon Steel Cast Iron Stainless Steel Aluminum Copper Magnesium Zinc	Ceramics Composites Lead Nickel Tin Titanium Elastomer Thermoplastics Thermosets
Surface finish - Ra:	16 - 125 μin	2 - 250 μin
Tolerance:	± 0.001 in.	± 0.0002 in.
Max wall thickness:	0.02 - 2.5 in.	0.02 - 80 in.
Quantity:	1 - 1000	1 - 1000000
Advantages:	All materials compatible Very good tolerances Short lead times
Disadvantages:	Limited to rotational parts Part may require several operations and machines High equipment cost Significant tool wear Large amount of scrap
Applications:	Machine components, shafts, engine components

Suitable Materials for Turning

In turning, the raw form of the material is a piece of stock from which the workpieces are cut. This stock is available in a variety of shapes such as solid cylindrical bars and hollow tubes. Custom extrusions or existing parts such as castings or forgings are also sometimes used.

Turning can be performed on a variety of materials, including most metals and plastics. Common materials that are used in turning include the following:

l Aluminum

l Brass

l Magnesium

l Nickel

l Steel

l Thermoset plastics

l Titanium

l Zinc

When selecting a material, several factors must be considered, including the cost, strength, resistance to wear, and machinability. The machinability of a material is difficult to quantify, but can be following characteristics:

l Results in a good surface finish

l Promotes long tool life

l Requires low force and power to turn

l Provides easy collection of chips

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