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We have the largest fluorite mine in the world

With our fluorite mine in San Luis Potosí we are the world's largest producer of this mineral.

Fluorite can be found in everything from gasoline to nuclear fuel, integrated circuits, nonstick coatings and toothpaste.

Fluorite is used in the manufacture of steel, class, ceramics and cement, which are key materials in the home construction industry and in major urban public works projects.

Fluorite is also the basis for making hydrofluoric acid, present in the refrigerating gases used in air conditioning.

Mexichem is the only company in the world whose production chain is fully vertically integrated, from the extraction of the fluorite mineral to the production of hydrofluoric acid and refrigerating gases in America, Europe and Asia.

  1. Aplications
  2. Production facilities
  3. Security

Applications - Hydrofluoric acid Metallurgical grade fluorite: is used in steel, cement, glass, and ceramics. 

Hydrofluoric acid: is used mainly for the production of refrigerant gases for air conditioning units.  

It is also used as a propellant, in the manufacture of gasoline, stainless steel pickling, in nuclear fuels, in the production of integrated circuits and Teflon, in salt fluoridation such as lithium salts used in batteries, and in sodium fluoridated salts used in tooth pastes and cleaning agents.

Refrigerantes:

Primary: Used as a transmitting agent in the refrigerating system, where they act in thermal interchange primarily in the form of latent heat. Refrigerating or cooling systems are mechanical devices that use the thermo-dynamic properties of the material to translate thermal energy in the form of heat between two or more focal points, as required. They are designed primarily to reduce the temperature of a product stored in refrigerating or cooling chambers, which can hold a variety of food products or chemical compounds, according to specifications.

Secondary: Acts in the intermediate thermal exchange between the primary refrigerant and external medium. Conducts the primary exchange in the form of sensible heat (sensible heat is the heat received by the substance, causing it to increase in temperature without changing its molecular structure and therefore its state).

Applications - Hydrofluoric acid Mexichem Flúor. Mexichem Flúor has two plants in Mexico:

  • San Luis Potosí - Mexico: The largest fluorite producer in the world. Exports its products to Canada, the United States, South America, Europe and Japan. Annual production of metallurgical gravel is 350,000 metric tons, along with 280,000 metric tons of acid-grade concentrate.
  • Matamoros - Mexico: The second largest plant in the world in terms of production capacity, at 208 million pounds a year. Exports 98% of its production to the United States. Produces anhydrous and aqueous hydrofluoric acid.
  • Runcorn - United Kingdom: This is Mexichem's first commercial-scale HFC-134a production plant. In the year 2006 it made the transition to production of HFC-125. This is the largest hydrofluoric acid production plant in the world.
  • St. Gabriel - Louisiana (USA). The world's largest producer of HFC-134a, supplying clients throughout the Americas and in export markets.
  • Mihara -Japan: We cover the Asian and Pacific market by supplying Klea ® 134a.

http://www.mexichemfluor.com

Río Verde Mine and Álamos.

Two fluorite production plants that turn out acid-grade and ceramic-grade concentrates. The plants are located in Ciudad Fernández, the municipality adjoining Río Verde (San Luis Potosí) and Álamos de Martínez, in the municipality of Victoria, Guanajuato.

The Río Verde / Álamos region is not only an interesting and attractive alternative site for production of this mineral, it is also important in geological terms because of its ample evidence of fluorite mineral outcroppings. Company geologists have determined that his region is an ideal site for mining this mineral.

Acid grade fluorspar

Description

Chemical Specifications

Physical Specifications

Acid Grade: calcium fluoride 97% Min.

CaF2: 97% Min.
CaCO3: 1.05 Max.
Sio2:  1.05 Max.


Above 100 mesh: 20%
Under 325 mesh:  38%

 

Metallurgical grade fluorspar

Description

Metallurgical grade

Chemical Specifications

Physical Specifications

CaF2

CaCO3

SiO2

Metallurgical grade (fine, pea-size, gravel, standard, special) calcium fluoride from 80% to 90% minimum.

Fine

80% Min.

7% Max.

10% Max.

100% menor a 12 mm

Pea size

88% Min.

3% Max.

6% Max.

Max. greater than
19 mm = 7%
Max. less than
3 mm = 10%

Gravel

88% Min.

3% Max.

6% Max.

Max. greater than 
30 mm = 5%
Max. less than
6 mm = 7%

Standard

88% Min.

3% Max.

6% Max.

Max. greater than
60 mm = 5%
Max. less than
20 mm = 7%

Special

90% Min.

2% Max.

5.5% Max.

Same sizes available as in metallurgical grade standard and gravel.

 

Hydrofluoric Acid

General Considerations

  • Hydrofluoric acid anhydride: white or colorless gas
  • Hydrofluoric acid aqueous: corrosive and colorless gas
  • Sulfuric acid: crystalline liquid
  • Calcium sulfate: hard solid, grey color

Refrigerant Gases

General aspects

  • Freezing point. Must be lower than any temperature existing in the system to avoid freezing in the evaporator.
  • Latent heat in evaporation. Must be as high as possible so that a small amount of liquid can absorb a large amount of heat.
  • Specific volume. Specific volume must be as low as possible in order to avoid bulky equipment in aspiration and compression lines.
  • Density. Must be high in order to use small liquid lines.
  • Condensation temperature must be as low as possible at maximum working pressure.
  • Boiling temperature, relatively low at close to atmospheric pressure.
  • Critical point: as high as possible.
  • Liquids must not be flammable, corrosive or toxic.
  • Because they must interact with compressor lubricants, must be miscible in the liquid phase and innocuous when combined with oil.
  • Refrigerants are used in many systems to cool the compressor motor -normally an electrical engine- so they must be good dielectric substances, meaning with low electricity conducting properties.

KLEA Refrigerant

Alternative

Refrigerant Number

Type of oil
to be used

Temperatures
(low/medium)

KLEA® 134a

R-134a

POE oils

MEDIUM

KLEA® 407A

R-407A

POE oils

MEDIUM/LOW

KLEA® 407C

R-407C

POE oils

MEDIUM/HIGH

KLEA® 410A

R-410A

POE oils

MEDIUM/HIGH

KLEA 404A

R-404A

POE oils

LOW

KLEA® 507

R-507

POE oils

LOW

KLEA® 508

R-508

A/B POE

VERY LOW

KLEA® 23

R-23

A/B POE

VERY LOW

KLEA® 32

R-32

POE oils

LOW/MEDIUM

HCFCs Refrigerant

Traditional Refrigerant

Alternative

Refrigerant Number

Type of oil
to be used

A 'drop-in' yes/no

Temperatures
(low/medium)

R-22

KLEA® 407A

R-407A

POE oils

NO

MEDIUM/LOW

KLEA® 407C

R-407C

POE oils

NO

MEDIUM/HIGH

KLEA® 410A

R-410A

POE oils

NO

MEDIUM/HIGH

KLEA® 134A

R-134a

POE oils

NO

MEDIUM