To improve the efficiency of technology and reduce production costs is the core of enhancing the competitiveness of steel enterprises. Since Hebei Xinda Group has promoted lean management, the companies have earnestly implemented, earnestly worked hard and widely publicized, and the lean management concept has really been implemented in the actual work, and the employees have really done the same work, the same frequency and the same direction, extracted the improvement points from the actual work, and promoted the enterprise to maximize the work efficiency and achieve the role of reducing cost and increasing efficiency.

Hebei Xinda Iron and Steel Group Co., Ltd. firmly establish the concept of "technological innovation to help improve efficiency", from the technical process, production organization, energy conservation and environmental protection, quality control, site management and other aspects of the beginning, formulate plans, clear goals, bold practice, continue to strengthen lean management, and actively carry out cost reduction and efficiency work.

Transformation of the front stop fire door of converter

The fire baffle door in front of converter in steel mill is an important facility for safe operation and clean production. It can prevent the occurrence of molten steel splashing and smoke running in the process of iron and steel smelting, and plays a great role in the safety production of enterprises. In order to respond to the company's slogan of frugality, cost reduction and efficiency increase, steel mills have worked hard on the replacement of fire doors.

According to previous experience, the replacement cycle of the fire door is customized by the outsourcing manufacturer, and the customization cycle is long and the cost is relatively high. In order to achieve the purpose of cost reduction and efficiency increase, Ren Haibing, the director of the steelmaking plant, broke the traditional concept, organized the corresponding section from design to construction details for many times, and many times to the site to map the size of the fire door; In the selection of materials, it is also according to local conditions, and the waste products of the rolling mill and the steel mill are used as materials for secondary utilization. In the transformation site of the fire door in front of the converter furnace, Ren Haibing and the workers demonstrated the specific construction details, under his guidance, the new fire door was set up in front of the converter furnace.
Small changes in ideas to promote each great change, to break the old concept is also the forefront of innovation, the transformation of the steel mill fire door using the rolled products smelted in the furnace about 24 tons, the total cost of about 50,000-60,000 yuan, if customized by a fire door pricing in 150,000 yuan, it is estimated that only a single fire door transformation can save the company more than 1 million yuan.

Oxygen enrichment in tundish increases tundish temperature

Because the tundish baking can not reach the baking effect, the baking temperature of the tundish of the smelting steel Q195D is at 700℃ for a long time, which leads to the bubble phenomenon of the open pouring billet and can not be rolled, resulting in a lot of waste. The single weight of the first blank is 17.89 tons, the total weight of the three is 53.67 tons, the processing cost of tons of steel is 280 yuan, and the total waste amount is 15027 yuan. In order to maximize the use of billets, steel plants use Q195L to open cans, but because the cost of Q195L is 44 yuan more than the cost of Q195D smelting, and the cost of each furnace steel is about 6600 yuan, the cost is still very large. Then the steel mill tried to use Q195L and Q195D mixed pouring, so there is a flocculation phenomenon in the operation of the tuber nozzle, which brings difficulties to the operation, and the replacement of each nozzle needs to throw waste of about 1 meter, weighing about 1.42 tons, a total of 4.26 tons of three streams, a waste of 1192 yuan, the need to replace 3 pipes, a unit price of 700 yuan, a total of 2100 yuan.

After research, it was finally decided to adopt the way of oxygen enrichment in tunic, increase the baking temperature of tunic, from the original 700℃ to the present 970-1050℃, the open can of molten steel from Q195L to Q195D, the phenomenon of bubbles in the open pouring billet no longer exists, which meets the rolling requirements and realizes zero waste. According to the calculation of about 20 times of hot exchange pouring in the steel mill every month, each pouring will save about 9,892 yuan, and this transformation can save about 197,800 yuan/month.

Technological transformation has less investment and quick effect, which is conducive to improving waste links in enterprise production and increasing benefits. Steel mills conscientiously implement the group's requirements of "technical transformation for efficiency", achieve all-round improvement in safety, environmental protection, quality and other aspects, and provide strong support for the high-quality development of Xinda.

Direction is clear thinking, clear thinking is walking firm. On the journey of building a first-class modern comprehensive strong enterprise, the work is endless and the tasks are difficult and complex. We still need to continue to work hard for a long time, and normalize the work of reducing costs and increasing efficiency. All companies in the group should strictly control links, consolidate fine management, strengthen technological innovation, reduce enterprise costs in multiple dimensions, and use "real money and silver" to nourish enterprise development. Enterprises will be able to jump to a new level of high-quality development!