Shop Best Slurry Pump Wet Parts in CNSME PUMP

Summary of the reasons for excessive power consumption of slurry pumps　　Slurry pumps are generally used in large-scale industrial applications. The actual products can be widely used in mining, electricity, metallurgy, coal and other industries for transporting slurries containing abrasive solid particles.Specifically, it is used in metallurgical ore dressing plants, hydro ash removal in thermal power plants, coal slurry and heavy media transmission in coal washing plants, etc.It can also be used in the chemical industry, and some corrosive slurries containing crystals can be transported, which requires a special material to be completed.The common application scope of slurry pumps is that in the mining industry, about 80% are used in mineral processing plants in the mining industry.The initial ore selection working conditions are relatively bad, and slurry pumps are mainly used as the conveying medium. Therefore, in this stage, the service life of slurry pumps is generally low.Facing different ores, the abrasive properties are different, so high chromium alloys are now used as the main slurry pump material.There are many materials for the slurry pump's overflow parts. The main operation process of the slurry pump is to drive the impeller to rotate at high speed and generate centrifugal force, and send the material out through the impeller.During operation, the overflow impeller volute must withstand the erosion, wear and corrosion of materials.Therefore, the wear resistance and corrosion resistance of the slurry pump overflow parts is an important indicator for measuring the quality of the slurry pump.The slurry pump often has excessive power consumption during use. In response to this problem, the technicians of the slurry pump company summarized the following reasons: 1. The viscosity of the conveyed liquid becomes larger; 2. The speed of the slurry pump becomes higher; 3. The specific gravity of the conveyed liquid exceeds the original design value; 4. The size of the water pump impeller is too large; 5. The resistance of the pipeline system exceeds or is not enough to be sufficient to the predetermined value; 6. There is friction between the rotor parts and the stator parts; 7. The flow of the slurry pump is too large; 8. The pressure of the mechanical seal on the seal seat is too large, and the bearing is worn or damaged; 9. The head of the slurry pump is too low and the flow is too large; 10. There is friction between the rotor parts and the stator parts; In addition, such as the slurry pump balance device does not work, the thermal expansion of different parts in the slurry pump is uneven, etc. are also the reasons for excessive power consumption of the slurry pump.

What is a corrosion-resistant pump? A corrosion-resistant pump is a type of pump pump, but the liquid it transports is not water. The pH value of the water is neutral and the corrosion is not high. However, when the liquid pH value is high or low, it involves the corrosion of acid and alkali liquids. Generally, civil water pumps use a very high one-time damage rate, mainly because overflow components have no corrosion-resistant materials, and are severely damaged when corrosion occurs.There are many materials for anti-corrosion pumps, which are roughly divided into metal corrosion-resistant pumps and non-metal corrosion-resistant pumps.Corrosion has always been one of the dangers of headaches in chemical equipment. If you are not careful, you can damage the equipment at the least, and cause accidents or even cause disasters at the worst.There is usually a misunderstanding that stainless steel is a good material, and it is very dangerous to bring out stainless steel pumps regardless of the medium and environmental conditions.The following is a key point for choosing corrosion-resistant pump materials for some commonly used chemical media: 1. Hydrochloric acid Most metal materials are not resistant to hydrochloric acid corrosion (including various stainless steel materials), and high molybdenum-containing ferrosilicon can only be used for hydrochloric acid below 50℃ and below 30%.In contrast to metal materials, most non-metallic materials have good corrosion resistance to hydrochloric acid, so lined rubber pumps and plastic pumps (such as polypropylene, fluoroplastic, etc.) are the best choices for transporting hydrochloric acid.2. Acetate is one of the highly corrosive substances among organic acids. Ordinary steel will seriously corrode in acetic acid at all concentrations and temperatures. Stainless steel is an excellent acetic acid-resistant material. Molybdenum-containing 316 stainless steel can also be suitable for high temperature and dilute acetic acid steam.For high-temperature and high-concentration acetic acid or other corrosive media, high-alloy stainless steel pumps or fluoroplastic pumps can be used.3. Sulfuric acid is one of the strongly corrosive media, and sulfuric acid is an important industrial raw material with a wide range of uses.Sulfuric acid at different concentrations and temperatures has great corrosion resistance to materials. For concentrated sulfuric acid with concentrations above 80% and temperatures less than 80℃, carbon steel and cast iron have good corrosion resistance, but it is not suitable for high-speed flowing sulfuric acid and is not suitable as pump and valve materials; ordinary stainless steels such as 304 (0Cr18Ni9) and 316 (0Cr18Ni12Mo2Ti) also have limited uses for sulfuric acid media.Therefore, pumps and valves for conveying sulfuric acid are usually made of high silicon cast iron (casing and processing difficult) and high alloy stainless steel (alloy No. 20).Fluoroplastics have good sulfuric acid resistance, and using fluorine-lined pump F46 is a more economical choice.4. Nitric acid Generally, metals are rapidly corroded and damaged in nitric acid. Stainless steel is a widely used nitric acid-resistant material and has good corrosion resistance for all concentrations of nitric acid at room temperature. It is worth mentioning that the corrosion resistance of molybdenum-containing stainless steel (such as 316, 316L) to nitric acid is not only not better than that of ordinary stainless steel (such as 304, 321), but sometimes even worse.5. Alkali (sodium hydroxide) Steel is widely used in sodium hydroxide solutions below 80℃ and 30% concentrations. Many factories still use ordinary steel at 100℃ and 75%. Although corrosion increases, it has good economicality.The corrosion resistance of ordinary stainless steel to alkali liquid has no obvious advantages compared to cast iron. It is not recommended to use stainless steel as long as a small amount of iron is allowed to be mixed into the medium.For high-temperature alkali liquids, titanium and titanium alloys or high-alloy stainless steel are mostly used.The company's general cast iron pumps can be used in low-concentration alkali liquids at room temperature, and various stainless steel pumps or fluoroplastic pumps can be used when special requirements are required.6. Alcohols, ketones, esters, and ethers Common alcohol media include methanol, ethanol, ethylene glycol, propanol, etc., ketone media include acetone, butanone, etc., and ester media include various methyl esters, ethyl esters, etc., and ether media include methyl ether, ethyl ether, butan ether, etc. They are basically not corrosive and common materials are applicable. When selecting, reasonable choices should be made based on the properties of the medium and related requirements.It is also worth noting that ketones, esters and ethers are soluble in a variety of rubbers, so they avoid errors when choosing sealing materials.7. Ammonia (ammonia hydroxide) Most metals and non-metals have very mild corrosion in liquid ammonia and ammonia water (ammonia hydroxide), and only copper and copper alloys are not suitable for use.Most of the company's products are suitable for the transportation of ammonia and ammonia water.8. Brine (seawater) The corrosion rate of ordinary steel is not too high in sodium chloride solution, seawater and salt water, and generally requires coating protection; various types of stainless steel also have very low uniform corrosion rates, but local corrosion may be caused by chloride ions, and 316 stainless steel is usually better.The company's various chemical pumps have 316 material configurations.

　　As the long-term use of slurry pumps, some parts will inevitably cause certain wear, and the pump shell is one of them.If the wear is not serious, you can continue working.If the equipment is worn seriously, it may cause the pump housing to crack and damage the entire equipment body.At this point, we need to repair the damaged part of the device.Let's see how to fix them.1. Before repairing the worn parts of the pump housing, the impeller must be removed to leave an operable space, and on-site dust protection and safety protection must be done.2. First observe the severity of the wear of the pump case, and then consider which method to repair it.3. Pre-weld the leakage of the pump body to strengthen the leakage points and weak points, and then rinse the pump shell with a lot of clean water to remove the paint remaining on the surface.4. Afterwards, the surface of the pump shell is blasted to remove the oxide layer, increase the roughness of the pump shell repair surface, and increase the adhesion of the repair material.5. When repairing the pump housing of the slurry pump, use excellent materials to spray, clean the surface before the spectrum, and then start spraying.6. When spraying, the paint must be sprayed correctly in a certain proportion.7. After repair, perform secondary repair to achieve the effect of no defects on the entire protective layer surface.8. After the repair is completed, cure by heating to fully utilize the performance of the restoration material.Many users don’t care if the slurry pump housing is worn and they don’t feel anything.However, if left to develop, long-term wear will seriously affect the normal operation of the equipment.Therefore, I would like to remind everyone that when the pump case is found to be worn, we must find out the cause and solve it in time to avoid the situation from worsening and the equipment being unusable.