How to Purify Biotite Mica?

As a Biotite Mica Exporter, share with you. Biotite is widely used in chemical industry such as building materials industry, fire protection industry, fire extinguishing agent, welding rod, plastic, electrical insulation, papermaking, asphalt paper, rubber, pearlescent pigment, etc. Ultrafine mica powder is used as a functional filler for plastics, coatings, paints, rubbers, etc., which can improve its mechanical strength, enhance toughness, adhesion, anti-aging and corrosion resistance. In addition to its extremely high electrical insulation, resistance to acid and alkali corrosion, elasticity, toughness and sliding properties, heat resistance, sound insulation, and low thermal expansion coefficient, it also introduced the first smooth surface of the two bodies, large diameter to thickness ratio, regular shape, Focus on strong features.

Biotite Mica

Biotite Mica has the same crystal form as phlogopite. The color is black, dark brown, sometimes with light red, light green or other shades. High titanium content is light reddish brown, high iron content is green. Transparent to opaque. Glass is glossy, while black is semi-metallic. The hardness is 2-3, and the specific gravity is 3.02-3.12.

The four steps of the general method of biotite purification are briefly introduced:

① Dust: It is separated by the specific gravity of minerals with the help of wind force, especially mica. Due to its flake shape, it can fly far away under the action of air flow (wind force).

② Tilt vibration: As different types of ore particles are subjected to unequal friction forces when they move on the inclined surface, they have different speeds of movement. Using this principle, the sand sample to be separated is tiled on a glass plate with a size of about 16-9 cm, and the glass plate is slanted with one hand and the glass plate is tapped with one hand. At this time, the granular Changying and other minerals are inclined to shake along the glass. And quickly rolled down, while the parameter mica is still on the glass plate, so that the purpose of purifying biotite can be achieved several times.

③ Squeeze-screen analysis: Using the characteristics of biotite's elasticity and non-breakability, tile a sample of about one gram between two glass plates of size 16 × 9: cm, and press it with the force of a vertical glass plate. (And a little rubbing), crush the brittle minerals (such as amphibole-, feldspar, quartz and other rock-forming minerals) to powder, choose appropriate sieve holes, sieve the mineral powder, the upper part of the sieve is pure Xia higher biotite.

④Cleaning: Because the sample has been broken several times, especially after the "squeezing" process, the biotite powder on the biotite surface must be placed in water or alcohol, and gently rubbed with your fingers. Wash the biotite powder, and the mica will be clean. Our company also has Dehydrated Mica on sale, welcome to consult.