Introduction of metal briquetting machine

The main body of the metal briquetting press adopts a multi-cylinder linkage structure, with 1 main cylinder, 2 side cylinders, 1 cover cylinder, 1 turning cylinder, and 5 hydraulic cylinders in total. The main hydraulic cylinder pushes the pressure head to reciprocate back and forth, the side cylinder pushes the pressure head to reciprocate left and right, the cover cylinder drives the cover plate to open and close, and the turning cylinder pushes the turning mechanism for turning motion.

The metal briquetting machine can be used for cans, paint buckets, iron cans, scrap iron, scrap steel, iron sheets, bicycles, color steel tiles, light and thin materials, pig iron, thin iron, exposed cans, red bull cans, scrap aluminum, scrap copper, iron barrels , Car shells, frames, metal trims, aluminum alloys and other scrap metals are pressed into forming at one time.

Metal briquetting machines are mainly used in recycling and processing industries and metal smelting industries. Various metal scraps, steel scraps, scrap steel, iron scraps, scrap copper, scrap aluminum, aluminum scraps, disassembled car shells, waste oil drums and other metal materials can be extruded into cubes, cylinders and other qualified materials in various shapes . It is convenient to store, transport and recycle, increase the speed of entering the furnace, improve labor efficiency, and reduce transportation, manpower and smelting costs.

For more detailed information about the metal briquetting machine, please consult Luoyang Zhongyuan Mining Machinery Co., Ltd.

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Introduction to the working principle of compound crusher

The compound crusher (composite crusher) is widely used in the crushing of various ore, cement, refractory materials, bauxite clinker, emery, glass raw materials, and special hard materials. It is widely used in the crushing scope of mechanism construction of sand and various metallurgical slags, and compared with other types of crushers, it has higher profitability.

Principle of Compound Crusher

The material from the compound crusher is affected by the centrifugal force of the vertical impeller rotating at high speed, the surrounding height and the impact of other streams colliding with each impeller material component at high speed on other materials, then they will form a vortex with the impeller and the shell several times of the material Impact, friction and grinding, from the bottom of the compound crusher, form a direct discharge through the closed-loop control of several projection equipment to achieve the specified finished product size.

For detailed information about the compound crusher, please visit Luoyang Zhongyuan Mining Machinery Co., Ltd. directly.

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Working principle of coal centrifuge

Coal centrifuge is a kind of dehydration equipment that uses the centrifugal force generated by mechanical rotation to realize the separation of solid-liquid mixture. The slime passes through the material inlet and passes through the distribution cone to make the space between the screen basket and the spiral discharge rotor.

Coal centrifuge

 

Under the action of centrifugal force, water and small particles (centrifugal liquid) pass through the material layer, pass through the screen, flow into the water collection tank on the upper part of the machine base along the upper cover, and then are discharged from the machine through the drain pipes arranged on both sides of the machine base. Outside: The coal particles are kept inside the screen basket. Because there is a speed difference between the spiral discharge rotor and the screen basket, the spiral discharge rotor scrapes the coal particles from the screen and pushes them to the bottom of the screen basket, thereby reducing The dehydrated slime (dehydrated product) is discharged into the collecting hopper under the machine, and this dehydration process is continuously carried out.

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Working principle of linear vibrating screen

The linear vibrating screen uses the vibration motor as the source of vibration power, so that the material is thrown up on the screen while moving forward in a straight line. The material enters the inlet of the screening machine evenly from the feeder, and generates data through the multi-layer screen. The oversieve and undersieve of various specifications are discharged from their respective outlets. It has low energy consumption, high output, simple structure, easy maintenance, fully enclosed structure, no dust spillage, automatic discharge, and is more suitable for assembly line operations.

The linear vibrating screen is driven by dual vibration exciters. When the two vibration exciters are synchronized and rotated in opposite directions, the excitation force generated by the eccentric block cancels each other in the direction parallel to the axis of the motor, and in the direction perpendicular to the axis of the motor. Stacking is a resultant force, so the trajectory of the screen machine is a straight line. The two motor shafts have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the material’s self-gravity, the materials are thrown up and jump forward on the screen surface for linear motion, so as to achieve the purpose of screening and grading the materials. It can be used to realize automated operations in the assembly line. It has the characteristics of low energy consumption, high efficiency, simple structure, easy maintenance, and a fully enclosed structure without dust spillage. The maximum sieving mesh is 400 meshes, which can screen out 7 kinds of materials with different particle sizes.

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Introduction to the performance of banana vibrating screen

The banana vibrating screen is a self-synchronizing heavy-duty equal-thickness screen. The screen box is similar to the shape of a banana. The screen beam adopts a box-shaped beam. The vibrator and the exciter are connected by an intermediate transmission shaft.
Banana vibrating screen is widely used in coal grading, desliming, dewatering, de-intermediation, and can also be used for screening in large-volume mining operations in mines. Compared with the traditional sieve of the same specification, the banana vibrating screen developed by our company has a larger processing capacity. Its processing capacity per unit area is 1.5~2 times that of the traditional one. It is a kind of vibrating screen with higher cost performance.

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About the extraction of nucleic acids

Basic knowledge of nucleic acid

Nucleic acid is divided into deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), among which RNA can be divided into ribosomal RNA (rRNA), messenger RNA (mRNA) and transfer RNA (tRNA) according to different functions.

DNA is mainly concentrated in the nucleus, mitochondria and chloroplasts, while RNA is mainly distributed in the cytoplasm.

In nucleic acids, purine bases and pyrimidine bases have conjugated double bonds, so nucleic acids have ultraviolet absorption characteristics. The ultraviolet absorption of DNA sodium salt is around 260nm, and its absorbance is represented by A260. It is in the absorption trough at 230nm, so ultraviolet spectroscopy can be used. The photometer is used for quantitative and qualitative determination of nucleic acids.

Nucleic acid is an amphoteric electrolyte, which is equivalent to a polyacid. A neutral or alkaline buffer can be used to dissociate nucleic acid into anions, which are placed in an electric field and move towards the anode. This is the principle of electrophoresis.

Principles and requirements of nucleic acid extraction and purification

1. Ensure the integrity of the primary structure of nucleic acid

2. Eliminate pollution from other molecules (such as eliminating RNA interference when extracting DNA)

3. There should be no organic solvents and high concentrations of metal ions that can inhibit enzymes in nucleic acid samples

4. Minimize macromolecular substances such as protein, polysaccharides and lipids as much as possible

Nucleic acid extraction and purification method

1. Phenol/chloroform extraction method

Invented in 1956, after phenol/chloroform treatment of cell crushing liquid or tissue homogenate, nucleic acid components mainly composed of DNA are dissolved in the aqueous phase, and lipids in the organic phase, and proteins are located between the two phases.

2. Alcohol precipitation method

Ethanol can eliminate the hydration layer of nucleic acid and expose the negatively charged phosphate groups. Positively charged ions such as NA﹢ can combine with the phosphate groups to form a precipitate.

3. Chromatography column method

The special silicon matrix adsorption material can specifically adsorb DNA, and RNA and protein can pass through smoothly, and then use high salt and low pH to bind nucleic acid, and low salt and high pH to elute to separate and purify nucleic acid.

4. Thermal cracking alkali method

Alkaline extraction mainly uses the topological difference between covalently closed circular plasmids and linear chromatin to separate them. Under alkaline conditions, denatured proteins are soluble.

5. Boiling cracking method

The DNA solution is heated to use the characteristics of linear DNA molecules to separate the DNA fragments from the precipitate formed by denatured proteins and cell debris by centrifugation.

6. Nano magnetic bead method

After the surface of superparamagnetic nanoparticles is improved and surface modified by nanotechnology, superparamagnetic silicon oxide nanomagnetic beads are prepared. The magnetic beads can specifically recognize and efficiently bind with nucleic acid molecules on the microscopic interface. Using the superparamagnetism of silica nanospheres, under the action of Chaotropic salts (guanidine hydrochloride, guanidine isothiocyanate, etc.) and an external magnetic field, DNA and RNA are separated from samples such as blood, animal tissues, food, pathogenic microorganisms, etc. .

7. Other methods

In addition to the above-mentioned commonly used methods, there are multiple methods such as ultrasound, repeated freezing and thawing, enzymatic hydrolysis, and hypotonic lysis.

8. Types of nucleic acid extraction

1. Total RNA extraction

Of the total RNA, 75-85% is rRNA (mainly 28S-26S/23S and 18S/16S rRNA), and the rest consists of mRNA and small RNA with different molecular weights and nucleotide sequences such as tRNA, 5S rRNA, 5.8S rRNA, miRNA, siRNA, small nuclear RNA (small nuclear RNA, snRNA) and nucleolar small molecule RNA (small nuceolar RNA, snoRNA) and other components.

2. miRNA extraction

MicroRNAs (miRNAs) are small, highly conserved RNA molecules, such as small interfering RNAs (siRNAs), which regulate the expression of their homologous mRNA molecules by base pairing with them to prevent expression through various mechanisms. They have become a key regulatory agency for development, cell proliferation, differentiation and cell cycle.

3. Genomic DNA extraction

For gene structure and function research and genetic diagnosis, it is usually required that the length of the obtained fragment is not less than 100-200 kb. In the DNA extraction process, various factors that cause DNA fragmentation and degradation should be avoided as much as possible to ensure the integrity of the DNA and lay the foundation for subsequent experiments.

4. Plasmid extraction

The plasmid extraction method is to remove RNA, separate the plasmid from the bacterial genomic DNA, and remove proteins and other impurities to obtain a relatively pure plasmid.

The magnetic bead nucleic acid extraction kit designed and produced by Luoyang Aisen Biotechnology Co., Ltd. is packaged in a carton, containing a deep well plate and a stirring sleeve. The deep well plate contains magnetic beads, lysate, washing solution, binding solution and eluent, in addition to individually packaged proteinase K.

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Introduction to the use of diamond polishing pads

Diamond polishing pad is a flexible processing tool made of diamond as abrasive and combined with composite materials. The back is glued with Velcro cloth, which is glued to the joint of the grinding machine. It is used for grinding, stone, ceramic, glass, and floor tiles. Special-shaped processing of other materials, suitable for stone polishing, line chamfering, curved board and special-shaped stone processing, and can also be used for marble, coagulation, cement floors, terrazzo, glass-ceramics, artificial stone, floor tiles, glazed tiles, vitrification The special-shaped processing, repair and renovation of bricks have strong grinding power, good durability, good softness, clarity, and good gloss. It is an ideal stone grinding tool. The whole process is divided into rough grinding, fine grinding and fine grinding. After polishing in four stages, the processed stone has a gloss of over 90°.

6-inch-diamond-polishing-pads

The scope of use of diamond polishing pads

1. It can be applied to different places such as new and old concrete floors, terrazzo floors, diamond floors, etc., and different polishing meshes can be selected according to different needs of customers. The brightness of polishing can reach more than 90 degrees.
2. It is used for the renovation of industrial floors, warehouses, parking lots and other concrete floors or various aggregate hardener floors, especially the hardened dust-proof and sealed hardener floors, which can be flexibly matched with various hands according to needs and habits. For grinding or refurbishing, use polishing pads of different sizes for rough grinding, fine grinding, fine grinding and polishing.
3. For the grinding and polishing of ceramic tiles, the ceramic tile manufacturer is equipped with manual, automatic full polishing machines and half polishing machines for the full polishing and half polishing of microcrystalline tiles, glazed tiles and antique tiles. Smooth and matt are optional. The brightness value of the glossy surface can reach more than 90; it is used for the ground treatment and renovation of microcrystalline tiles and various ceramic tiles. It can be flexibly used with various hand grinders or refurbishing machines according to needs and habits.
4. It is used for the treatment and renovation of various floors and steps laid by granite, marble, and artificial stone slabs. It can be used with various hand grinders or refurbishing machines according to needs and habits.

 

Diamond polishing pad specifications

Specifications: 3 inches, 4 inches, 5 inches, 6 inches, 7 inches, 8 inches
Thickness: 2.5mm, 3.0mm, 3.5mm;
Granularity: 30#, 50#, 80#, 100#, 120#, 150#, 200#, 300#, 400#, 500#, 600#, 800#, 1000#, 1500#, 2000#, 3000#

Characteristics of diamond polishing pad

1. Unique resin bond, strong grinding force;
2. Fast polishing speed and high finish;
3. High degree of wear resistance and long service life;
4. There is no scratch or color left on the stone after grinding and polishing (not easy to stain).

 

Diamond polishing pads are made of high-quality diamond micropowder and resin bond materials, with exquisite technology and advanced production technology. They are mainly used for the polishing and polishing of various shapes of natural stones or artificial stones. They can also be used for decorative stone cleaning, trimming and Update. It can be flexibly matched with various hand grinders, floor refurbishing machines, ceramic polishing machines, angle grinders, floor grinders, etc. according to customer needs and habits.

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What is the reason for the chromatic aberration of the stone of the floor renovation sheet?

Now everyone’s living conditions are getting better and better, and they are beginning to pay attention to the things around them slowly. Among the products we produce, some products need to be polished because of their rough appearance. At this time, our polishing pads are brought into play. , There are many polishing pads around us, such as diamond polishing pads, concrete polishing pads, resin polishing pads, etc. These polishing pads have a very large effect and have different applications. Dry polishing pads can be polished without water. , Water-based polishing pads need to be polished with water. In addition, we now have floor refurbishing films. Next, let’s talk to the polishing pad manufacturers to learn about floor refurbishing films.

Polishing-pad-size

The determination of the color of the stone in the floor renovation film should be a summary of multi-disciplinary such as architectural aesthetics, environmental science, humanistic psychology and economics, which is also the key for the designer to fully embody his design thinking and ideas. Of course, when using stone as decoration materials, color difference is a problem that cannot be ignored. Whether it is granite, marble or sandstone when selecting materials, there is a problem of color difference. Pay special attention when paving the same type on the same plane with a larger area.

Causes of color difference in stone

5-inch-diamond-polishing-pads

The stone blocks come from the initial mining layer of the mine, from different pit openings or different levels; after the stone processing, the row coding is not carried out according to the number and batch of the blocks; the stone paving does not follow the code list provided by the supplier And batch number. The introduction of floor refurbishment tablets Because of the reserves and ore bodies, the degree of color difference reflected in the detailed stone types is different. Some types of stone types close to 1,000 square meters or tens of thousands of square meters will not cause problems, while some types are several One hundred square meters cannot be guaranteed. Therefore, when choosing the type and color of stone, we must think about it. Large-scale plans can go to mines, factories, or existing cases to conduct on-site investigations.

6-inch-diamond-polishing-pads

From the above, we can know that the floor refurbishment sheet plays an important role in our floor refurbishment process. The price of the floor refurbishment sheet is relatively cheap, and it is very suitable for the use of the floor. When we refurbish the floor, we must pay attention to avoiding damage to the internal structure of the floor. We can only handle the surface of the floor. You need to be cautious when refurbishing. You can add some cleaners if necessary. I believe you will have a new style of floor after use, which will bring you a sense of comfort.

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Introduction of concrete polishing construction technology

With the continuous development of concrete materials and construction techniques, people’s performance requirements for concrete are not limited to compressive strength, but on the basis of strength, more attention is paid to the comprehensive indicators of concrete durability, deformation performance, aesthetics and decoration performance. Balance and coordination.

Polished concrete is a typical representative of concrete floors. It is a new type of high-strength, high-brightness inorganic floor, durable, super long life, and can be maintenance-free in the later stage. It is an all-round ground.

Concrete polishing features

In addition to the advantages of concrete polishing floor, it is easy to clean, low maintenance cost, and long service life. Its relatively high wear resistance coefficient makes it very suitable for public places with high traffic. Concrete polishing can also reduce allergens and inhibit the growth of mold. In addition, it has been proved through practice that high-reflectivity concrete polished floors can increase natural brightness and have a certain effect on reducing lighting energy consumption.

Concrete polishing construction technology

The early stage of the concrete polishing process includes four steps of grinding (rough grinding), repairing, curing, and polishing (fine grinding). Generally, the tools and steps used need to be further adjusted according to the actual situation to achieve the final design effect. The foreign leading ultra-fine polishing system also includes the “surface impermeability and anti-fouling protection process”. The effective protection can reach more than 15 years after the use of a special protective agent for concrete. During this period, only dry cloth or special cleaning pads are required to wipe. Floors such as ceramic tiles, etc. need to be maintained frequently with detergents, wax water, etc., and concrete polished floors are inexpensive and environmentally friendly.

(1) Grinding (rough grinding) refers to the use of metal diamond tools for grinding, which can remove fine pits, blemishes, colorants or other thin coatings on the ground (such as epoxy coating, self-leveling cement, PVC plastic ground, etc.) ) To prepare for the subsequent polishing process. According to different concrete floor conditions, the grinding process can usually be divided into three to four steps.

5 inch concrete polishing pads

(2) Repairing refers to the use of repairing agent to fill in the air bubbles, cracks, and fine cavities in the concrete.

(3) Curing refers to the process of applying curing agent on the surface of concrete to harden the concrete. The curing agent can not only penetrate into the small gaps of the concrete, tightly fill the pores, but also greatly increase the strength of the concrete and make it more durable, thereby greatly reducing the workload of later maintenance of the floor.

(4) Polishing (precision grinding) refers to the use of concrete polishing pads to polish the ground until the ground shows the expected gloss, which can be divided into three to five steps.

According to the ground conditions and gloss requirements, the maximum usable number of concrete polishing pads is 3,000. Concrete polishing pads of different meshes can make the surface appear elegant, pure matte, or high-reflective gloss.

13 inch concrete polishing pads

Although the concrete floor can be polished by wet grinding or dry grinding, because dry polishing is faster, easier to operate, and more environmentally friendly, dry polishing is currently one of the most commonly used polishing methods in the industrial field. Wet polishing requires water to cool the emery grinder and remove grinding debris from the machine. Since water can reduce friction like a lubricant, it can extend the life of the polisher. But the biggest disadvantage of wet polishing is that it produces a lot of mud. Dry polishing does not require the use of water, and the floor polishing machine used in dry polishing is equipped with a dust collector, which can effectively absorb dust particles.

Foreign advanced dust collection equipment usually has three-stage filtration equipment and pulse blowback device, which can filter out 99.9% of the dust above 1 micron (PM1). The collected dust can be used in brick making plants or mixing stations to replace fly ash Used in the production of concrete.

After the concrete polishing process is ground to remove the surface of the concrete, it can often express the natural color of the concrete better. The concrete mixed with premixed cement and specific or specialty stone aggregates (such as pebbles, granite, black basalt or ore, waste rock, etc.), after ultra-fine polishing, can show more color effects.

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How to maintain marble

Marble is hard material, which is one reason why people choose it as home decoration material. Although marble is strong, beautiful and elegant, it is a more sensitive material. You can usually use the term “externally soft and internally strong” to describe it.

Marble has a hard inner quality, but the polished appearance is extremely fragile and requires special maintenance. When you step on it, you should prevent marks from being left, and the objects placed on it should be handled gently. In response to the above problems, the best polishing pad manufacturers gave us a detailed introduction on the methods of marble maintenance, let’s take a look!

Marble

1. Water and wet substances

From the appearance, water does not pose a threat to the beautiful and elegant marble surface. In fact, it is deceived by the surface phenomenon. Water has enough power to destroy the beautiful marble sheet. The water or other damp substance mixed in the glass is enough to leave scale on the surface of the marble, and the scale will slowly penetrate the entire marble surface and leave stains that are difficult to wipe off.

A good way to deal with it is to prevent water droplets from dripping on the marble surface, but in reality it is often impossible to do so, so what you can do is to wipe off the water droplets in time, so as to prevent the progress of water from entering.

2. Acidic and alkaline substances

When cleaning the marble sheet, a neutral detergent should be used. Both acidic and alkaline detergents can easily corrode the surface of the marble.

Of course, it is not only detergent that will corrode the surface of the marble, like some acidic substances such as orange juice, lemon juice, soda, apple juice, tomato juice, wine, etc., will corrode the surface of the marble, and the PH Alkaline bleach will also corrode marble.

Granite

3. Scratches

There is no doubt that the internal quality of the refurbished marble is hard, but the smooth surface is very fragile. If the sole is stuck with sand, it is easy to leave scratches, and the bottom of the furniture will also give the marble surface if it is not placed protectively. Leave scratches, and drag objects on the marble floor.

The basic protection method is to shake off the gravel sticking to the sole of the shoe before stepping on the floor, put a protective layer on the furniture, try to avoid dragging objects on the marble floor, and don’t have things with sharp edges.

Of course, there are other substances that pose a threat to marble, but as long as you pay attention to the details mentioned above, it can bring many uses for your marble maintenance.

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