The first generation of medium crushing impact crusher has some problems, such as high discharge grain type pin degree, inconvenient adjustment of impact plate and uniform plate protection device, low reliability of uniform plate protection device, improper shell split surface and structure setting leading to high transportation cost and poor installation adaptability in small space. The new generation TKPFM type medium crushing impact crusher has improved the main structure of the levelling plate, changed the original flat lining plate of the material contact surface into a serrated rack, and improved the grinding levelling efficiency of the material. The adjusting structure of the mechanical counterattack plate and the mechanical adjustment and protection device of the whole plateis changed to the hydraulic type , which not only shorts the adjustment time, but also improves the reliability of the protection of foreign matter.The side and end of the shell are changed from welded structure to bolted connection, and the section surface is re-optimized, which reduces the maximum bulk unit weight ratio of the equipment after disassembly, and makes transportation and installation more convenient. The actual application of many projects shows that the new generation of TKPFM type crushing impact crusher has better performance, more convenient operation and maintenance, low transportation cost and stronger installation adaptability.

Taking the successful modification of domestic cement vertical roller mill in a cement factory as an example, the application of TCDRI new grinding area technology in the modification project of domestic cement vertical roller mill is introduced. By changing the flow rate and movement path of the material on the table, the effective grinding zone is widened, so as to improve the stability of the vertical roller mill, increase production and reduce consumption. This modification adopts the method of online welding, shorten the period of modification. The construction period is 20 days, and the return on investment is high. Under the condition of the same cement recipe and fineness of finished products, the output of No. 1 mill was increased by 38%, and the power consumption of the system was reduced by 3 kW?h/t. The output of No.2 mill is 22%, and the power consumption of the system is reduced by 2.6 kW?h/t.

The ZGM113G vertical coal mill has some problems such as high pressure difference in grinding, large vibration value, large slag discharge, low grinding efficiency, and the output cannot meet the requirements of cement production. Based on the analysis and analysis of the actual operating conditions of the coal mill and the internal and external factors affecting the production, some measures were taken, such as adding a hot air settling chamber, reforming the grinding area and reforming the powder separator. After the transformation, the system runs stably, the slag spitting amount is reduced, the equipment failure rate is reduced, the mill output is increased from 35t/d to 45t/h, the yield increase is 28.5%; The main motor current of the mill is reduced by 9A and stabilized at about 65A, and the power consumption of the main motor is reduced by 0.5kW?h/t.

The pyro system of a 5 000t/d cement clinker production line originally used a dual series five stage preheater system, a three jet decomposition furnace, and a third-generation grate cooler with air beams. Due to the long running time of the production line, there are problems in the pyro system, such as high resistance of the preheater system, high outlet temperature of C1, unreasonable air usage of the cooler fans, high clinker temperature at the outlet of the cooler, and low heat recovery efficiency. Based on the on-site thermal diagnosis results of the pyro system, a technical analysis was conducted on the problems encountered during operation, and an optimization plan for the pyro system was developed. Technical transformation was carried out from the adjustment of the spreading device, expansion of the cyclones, expansion of the calciner, replacement of efficient and energy-saving fans, and replacement of the fourth generation grate cooler with middle roller crusher. After the implementation of the technical transformation, the system energy consumption was further reduced, the system resistance was reduced, and the heat exchange efficiency was improved, achieving the expected technical transformation goals.

The raw material fly ash used for cement production adopts the measurement method of "gasification box & double rotor scale". Although different ranges of double rotor scales can meet the measurement needs of different amounts of fly ash, there are often problems such as fluctuations in fly ash feeding, easy material leakage in the rotor scale body, low measurement accuracy, and limited space at the bottom of the fly ash silo at the production site, which makes it impossible to install a separate material stabilizing device. By using a combination of "labyrinth seal" and "end face seal" to optimize the sealing of the rotor scale, installing a pressure reducing cone and an inflation box, and using a new cement component tester to determine the amount of fly ash added based on the feedback of the rotor scale body data, the sealing performance of the rotor scale body has been effectively improved, and the feeding stability and measurement accuracy have been improved. The annual production cost can be saved by about RMB 820 000.

Electrode configuration is an important component of electrostatic precipitators. Through experiments, the surface current density and distribution of six commonly used cathode wires and C480 anode plate configurations in industry were discussed, and the influence of different electrode configurations on electric field characteristics was analyzed. In order to improve the phenomenon of "current blind spot" in the supporting circular tube of RS and BS wire structures and suppress the corona caused by the inner and outer spikes of BS wire, an optimization plan for the cathode wire structure was proposed. Based on the pilot experiment of three electric fields, a layout form for the combination application of electrode configuration in the front and rear electric fields of the electrostatic precipitator was given. The results showed that after optimizing the electrode configuration combination method, the dust concentration at the outlet of the electrostatic precipitator can be reduced by 77.68%. 

The shipment volume of sand and gravel aggregates is large, and there is a high demand for shipping efficiency. This article compares the application efficiency of the "One card communication " and "One code communication " software processes for sand and gravel aggregate shipping and sales, as well as the advantages and disadvantages of the three loading and shipping methods. It introduced the overall architecture, workflow, and main components of a driver self-service quantitative loading system based on the "One code communication " process. The system uses logistics sales system APP  to book and place orders, "One code communication" vehicles to queue up and dispatch automatically, truck scale intelligent to weigh and reload vehicles, and access control system to control vehicle access. It realized automatic and intelligent control of various work processes such as gravel aggregate loading appointment, queuing, weighing, blanking, settlement, and delivery, and improved the efficiency of gravel aggregate loading and shipment.

The whole process of mineral powder delivery from car entry to mineral powder measurement, bulk loading, loading and leaving was sorted out. The problems of poor communication, low automation and low accuracy in traditional mineral powder delivery system were analyzed. A one‐button mineral powder delivery system with high automation and information technology was proposed. The actual operation shows that the modified one-button delivery system realizes full process automation online delivery management, the loading time of each car is reduced from 30min to 20min, the delivery efficiency is increased by 33%, and the annual electricity cost can be saved by 156,000 yuan and the labor cost is saved by about 480,000 yuan.

In response to the problems encountered in the cement production line using calcium carbide slag, such as cement kiln ringing, preheater crusting or even blockage, excessive temperature of clinker from grate cooler outlet, the fault of breaking material occurred frequently in drying and crushing system, NOX emission risk, etc, a series of optimization and transformation measures were formulated. By taking reasonable control of process parameters, replacing kiln head burner, adding kiln head waste gas treatment system, replacing a fixed grate bed of grate cooler with a new type of quenching inflation box, optimizing carbide slag conveying system, lengthening and thickening gooseneck pipe, adopting single side rotary inlet air of tertiary air duct and other measures, the problem of long-term stable production has been solved well, and now the continuous operation of high efficiency and low consumption of carbide slag cement production line can be realized. After the optimization and upgrading, the amount of ammonia water per ton of clinker decreased by more than 50% when the NOX emission of the chimney was less than 100mg/Nm³.

Lithium slag is a kind of industrial waste residue of lithium battery, the activity is up to 95% ~ 110%. As a high-activity cement mixture, it can effectively improve the quality of cement, reduce the cost of cement ingredients, ease the contradiction between supply and demand of the mixture. In this paper, the application status and chemical properties of lithium slag are analyzed, and suggestions on the selection and optimization of lithium slag are put forward. The utilization scheme of lithium slag is influenced by many factors, such as clinker quality and purchase cost.