Application of Titanium in Xiangyu Salt Mine (II)

Titanium application effect

Application of a titanium material since Xiang Li salt mines, and the effect is significant; (see Table 2)

1. Extend the service life of equipment, reduce the number of inspections, save energy and increase effective production time. For example, plant refrigeration Glauber pump (6SH a type 6) is made of cast iron in the past, the replacement once every three months, the life of only one month the impeller. After replacing the titanium pump, it has been running for nearly 6 years. No corrosion has been found. Only the impeller has a slight mechanical wear. It only needs to be repaired once a year, and the rest is the same as the installation. Another example is the ammonia evaporator, which has not been found to be corroded for 5 years. At the same time, the titanium tube also fully exerts the superiority of the tube wall and is not easy to scale. The ammonia washing evaporator (washing tank) can be reduced by one-half and the energy can be reduced. Consumption increases the effective production time. For example, the salt slurry conveying pipe, the carbon steel pipe is used for 2 months, and the stainless steel pipe is pitting, perforating, etc. for 6 months, and the titanium pipe is used for more than 5 years without corrosion, and the surface still retains the original silver white gloss. In addition, the rest of the place where titanium is used, the service life of equipment and components are several times to several tens of times longer than that of carbon steel, which fundamentally solves the phenomenon of running and dripping in the production of salt and nitrate, and the appearance of the workshop is one of the new.
2. The use of titanium is economically reasonable. It provides favorable conditions for reducing equipment and material costs and reducing production costs. Although there is more investment in the use of titanium, it is economical in the long run and from a comprehensive perspective. For example, titanium salt slurry pipe, mine began in May of 77, so far Ø108*3, Ø89*3 and other salt slurry pipes have been installed 440m, no corrosion has been found for more than 5 years, and it can be used for many years. The service life of stainless steel salt slurry pipe is only half a year. From the perspective of material cost, it is calculated by investment per meter: stainless steel pipe Ø89*4,152 yuan/m (Ø108X 4.5,208 yuan/m); titanium material Ø89*3,445 yuan/ m, (Ø108*3,544 yuan/m), titanium pipe used for more than 5 years, no corrosion found, if the stainless steel pipe needs to be replaced 11 times, the investment is 1672 yuan (2288 yuan), which is 3.76 times of titanium investment (4.2 Double). That is, using a titanium salt slurry pipe, one investment can be recovered in one and a half years. Another example is the titanium pump. In March of 77, the thenardite workshop started to use 6SH-6 titanium refrigeration circulating pump. It has been running for 5 years and 8 months without corrosion. The original 6SH-6 cast iron pump has a service life of only 3 months. Investment of 4770 yuan / Taiwan, cast iron pump 585 yuan / Taiwan, if the operation of 5 years and 8 months need to replace 22 cast iron pumps, that is, need to invest 12870 yuan, is 2.7 times the investment of titanium pumps, that is, the use of titanium pump 2 years and zero One investment can be recovered in 2 months. Another example is titanium ammonia evaporator, carbon steel equipment 15,000 yuan / Taiwan, service life 10 months, titanium equipment 250,000 yuan / Taiwan, began to use in October 77, so far intact, pre-juice can also be used for 10 years, in order to calculate the service life of 15 years, as little as 18 sets of equipment of carbon steel, gold 270,000 yuan joint venture, to remove a titanium equipment investment, but can still save money 20,000 yuan.
Titanium is 4-5 times the price of stainless steel, but its specific gravity is only one-half of a stainless steel ^(3, stainless steel, titanium in the proportion of ^{4.51g / cm 7.93g / cm 3)} , the same standard equipment, titanium materials than stainless steel Reduce the dosage by half. Thus, the actual price of titanium is only 2-2.5 times that of stainless steel. Due to the high corrosion resistance of titanium, when the equipment is manufactured, the thickness of the material can be appropriately thinned under the premise of satisfying the design pressure, and the investment can be saved. Due to the long service life of titanium products, reducing equipment renewal costs and frequent maintenance costs, it actually saves costs and reduces costs.
Xiang Li Salt device has titanium, titanium castings, titanium salt slurry pipeline a total of about 60 tons, the original carbon steel, stainless steel, copper sheet comparison, annual savings in replacement costs 350,000 yuan (titanium equipment life estimated by computing , titanium castings and salt slurry pipes are calculated according to the time of use). If you add labor and auxiliary materials costs saved by reducing equipment maintenance, as well as increase production and reduce costs, the economic benefits will be more significant.
3. It has created favorable conditions for improving the quality of salt and nitrate products. In the past, the main equipment of the refrigeration system in the thenardite workshop was severely corroded, the production was extremely abnormal, and the output of the thenardite was low and the quality was poor. The fine brine supplied to the salt making workshop can not meet the requirements, and the amount of mirabilite contained in the refined salt of the product exceeds the requirements of the ministerial standard, which seriously affects the product quality and corporate reputation. After switching to titanium equipment and salt slurry pipelines, the corrosion problem is basically solved, and technological transformation of processes and equipment is strengthened to strengthen enterprise management, and production is gradually moving toward normal. The increase in the output of thenardite meets the fine brine required for salt production, thus ensuring the quality of refined salt. 81 years of refined salt, the first grade rate reached 73.85%. The third grade salt was eliminated. In 1982, the first grade of refined salt rose to 93.93%. Snow brand refined salt was rated as a quality product in Hunan Province in 81 years. At the same time, the quality of thenardite has also increased greatly, and the products have changed from slow-moving sales to selling, and demand is in short supply. The average sodium sulfate content of Glauber's salt in 81 years increased to 98.86% (the average sodium sulfate content in the exported anhydrous sodium sulfate was 99.3%). Drilling tower brand anhydrous sodium sulfate was rated as a quality product in Hunan Province in 82 years. In September of the same year, in the similar product evaluation of the General Administration of Salt Industry of the Ministry of Light Industry, the Glauber's salt in the Xiangyu Salt Mine was ranked first.
In short, since the application of titanium in March of the Xiangyu Salt Mine, it has indeed received significant economic benefits. Practice has proved that titanium is an excellent corrosion-resistant material in the production of salt and nitrate. It can prolong the service life of the equipment, is conducive to the stability and improvement of product quality, and has obvious technical and economic benefits. It can be confirmed that the promotion and application of titanium in the vacuum salt industry is meaningful and promising. We are determined to persevere in this work and continue to summarize and improve.

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