Sodium sulfide industry "wash and wash" healthier
A general term for a alloy consisting mainly of iron, carbon and silicon.
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It is understood that since 2005, the domestic market demand for sulfuric acid has continued to increase, while production has also steadily increased. By the end of 2007, the total production capacity was 700,000 tons/year, and the output last year reached 528,000 tons. However, due to the fact that sodium sulfide is a highly polluting production industry, the establishment of factories in developed cities on the eastern coast of China is limited, and foreign developed countries also have strict control over the production of sodium sulfide, resulting in the sulfur sulfide market has been in short supply in recent years. It continues to rise in this context.
The hot market situation has attracted many companies to expand their production and new sulfuric acid projects, but most of them lack sufficient awareness of potential risks. According to reports, sulfuric acid as a resource-dependent industry, the production process determines its main dependence on Glauber's salt and coal resources. According to the information provided by the China Inorganic Salt Association Glauber's Salt Sulfate Branch, the raw material cost per mi t of sodium sulfide product increased by RMB 30-80 per ton in the same period of last year, and the raw material cost for coal increased by RMB 150, plus the electricity fee. , packaging, personnel salaries, etc., the average cost of production per ton of sodium sulfide increased 150 to 320 yuan.
Since 2008, the price of coal has soared further. After March, large yuan powder manufacturers all over the country have raised their prices, resulting in many sulfuric acid companies on the brink of losses. Experts believe that this situation requires that sulfuric acid production enterprises must vigorously adjust the product structure, develop marketable special sulfide base, granular sodium sulfide and other species, and vigorously increase production of lutetium and other high-grade products to obtain more than ordinary products. Double the profit margin and seek opportunities for growth.
In addition, the characteristics of high energy consumption and high pollution of sodium sulfide have determined that it will inevitably become one of the key areas for the chemical industry to promote energy conservation and emission reduction. The sulfuric alkali industry is not only a large consumer of energy, but also has serious environmental pollution during the production process. According to relevant statistics, for every 1 ton of sulfurized alkali product produced, the coal consumption per million tons of production value far exceeds the relevant national standards; solid waste such as soda ash and alkali sludge discharged during the production of sulfurized alkali, and waste water containing large amounts of alkaline substances. , Emissions of dust, exhaust gas, etc., also pose a certain hazard to the environment.
Industry experts said that accelerating the pace of product structure adjustments and vigorously developing high value-added products are the countermeasures for sulfuric alkali enterprises. Sulfide companies should actively respond to the national call for energy saving and emission reduction, increase investment, and carry out major technical innovations in processes and equipment to develop and promote new technologies for energy saving, water saving, and environmental protection. Only in this way can they be truly sustainable. development of. Those enterprises that have failed to meet the standards for energy conservation and environmental protection will eventually be able to escape the destiny of being cleared out of the market.
In these alloys, the carbon content exceeds the amount retained in the austenite solid solution at the eutectic temperature.