How to relieve the problem of barite settlement?
The sedimentation of weighting agents in high-density drilling fluids is difficult to avoid completely. This requires researchers to focus on how to effectively improve the dispersion and suspension of barite in high-density drilling fluids, which requires increasing the shearing force of drilling fluids. At the same time, the barite particles in the high-density drilling fluid have good dispersibility.
One is to add a structural stabilizer to strengthen the spatial network structure of the drilling fluid, and the barite has better suspension and dynamic stability of the drilling fluid. However, this method has a limitation. It improves the dispersibility and suspension of the barite powder in the drilling fluid, and at the same time causes the rheological deterioration, and the economic cost is high, which limits the drilling fluid to some extent. Practical application. There is also the addition of a chemical modifier to activate the surface of the barite particles. The sampled barite particles become more hydrophilic or lipophilic, effectively reducing the agglomeration of barite, and its suspension stability in the drilling fluid. Both sex and dispersibility are improved. 
Black phosphorus is a layered structure like graphite . Is it possible to make black phosphorus into black phosphorus?
can. A single layer of black phosphorus has been successfully prepared. The black phosphorus block is peeled off layer by layer by mechanical peeling, and the thinnest stripped to 2 layers can not be peeled off. Then, the two layers of black phosphorus were thinned by plasma to obtain a single layer of black phosphorus, or phosphonene. This method is certainly small in yield, and the prepared phosphonene is small in size, but it can meet the needs of laboratory micromachining and testing.
How to distinguish the symbiosis and associated of minerals?
The phenomenon that different minerals formed by the same genesis and the same metallogenic period (or metallogenic stage) coexist in the same space is called the symbiosis of minerals, and the minerals that are symbiotic with each other are called symbiotic minerals.
The phenomenon that minerals of different genesis or different mineralization stages coexist in the same space is called mineral concomitant.
What is the best shading rate of the laser particle size analyzer?
The opacity can be defined as the ratio of the opaque cross-section of the particle in the beam to the total area of ​​the beam, which is often expressed as a percentage of the total amount of light output (excluding background scatter) from the light scattered and absorbed by the particle. Therefore, the light blocking rate is also called the optical density. The specific calculation method is to divide the difference between the light intensity I0 of the detector center point and the light intensity Ii of the detector center point after the laser is transmitted through the pure medium by the light intensity I0, that is, the light blocking rate=(I0-Ii)/I0. ×100%, usually the best light blocking rate of the laser particle size analyzer is between 10% and 15%.
The optical concentration is different from the volume (mass) percentage of the particles. The former is related to the particle size. The smaller the particle, the larger the specific surface area, and the stronger the light blocking ability. Therefore, of the two samples with the same volume concentration, the smaller particles will show a larger optical concentration in the laser particle size analyzer.
What is the main reason for the ball mill running rough?
The ball mill "running rough" is an abnormal phenomenon that indicates that the fineness of the milled product is significantly thicker and difficult to control, and generally appears on the double-barrel open-tube mill with a relatively small long diameter. The ability of the rough grinding bin to be too strong and the ability to finely grind the bin is the main reason for “running roughâ€. In this case, even if the ball mill output is appropriately depressed, the fineness of the product is still coarse. The fineness of the product due to excessive feed is not in this case.
What is the difference between expanded perlite and vitrified beads?
Same point:
1. First of all, both are preheated by perlite ore, and are instantaneously baked at high temperature to form a white granular material, that is, the raw materials produced by both are the same, and are derived from perlite ore.
2. The second is the product after high temperature expansion, so the chemical composition of the two is the same, all resistant to acid and alkali, colorless, odorless, non-toxic, all belong to the Class A fireproof material promoted by the Ministry of Construction.
3. Finally, both structures have certain micropores, so they all have the characteristics of heat preservation, heat insulation and sound absorption, and are widely used in building insulation systems.
difference:
1. The difference in structure: the expanded perlite is an open hole, and the vitrified microbead is a closed hole, so the vitrified microbead is also called a closed-cell perlite.
2, different processing equipment: perlite is generated by the heat expansion of coal gas from the furnace, and the glass beads are made expandable by the furnace.
3. Different water absorption rate: The vitrified microbeads are not easy to absorb water, and the expanded perlite has a large water absorption rate. Once absorbed, the thermal insulation effect of the expanded perlite will be greatly reduced.
4, the bulk density is different: the expanded perlite is generally 70-100kg / m3 vitrified beads at 110-130kg / m3.
5, the application range is different: vitrified microbeads are mainly used for exterior wall insulation, and expanded perlite is mainly used for roofing and floor insulation.
What is the difference between silicon micropowder and micro silicon powder?
The silicon micropowder is made up of natural quartz (SiO2) or fused silica (natural quartz is fused at a high temperature and cooled by amorphous SiO2) by crushing, ball milling (or vibration, jet milling), flotation, pickling purification, high purity water treatment, etc. The micro-powder processed by the process.
Micro-silica powder is also called silica fume or agglomerated silica fume, and some people call it silicon powder. When iron alloy ferrosilicon smelting industry and the silicon (metal silicon), the thermoelectric ore generated in the furnace of a large amount of highly volatile Si and SiO2 gas, and air rapid oxidation condensed gases from the precipitate.
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