Kerui News

Total refractory solutions and services from a single source We provide complete, reliable and high quality refractory product selection and configuration solutions for customer needs, and comprehensive, feasible and long-life furnace construction services for kiln operation conditions. For 16 years, our company has focused on refractory and industrial furnace applications, product selection, turnkey projects and furnace maintenance to meet the different needs of our customers. Construction guidance details The position of industrial furnaces as an important part of enterprise production cannot be ignored. Their efficiency, stability and economy directly affect the core interests of enterprises. As the saying goes, “three parts material, seven parts construction”, the quality of refractory masonry for furnaces directly determines the effect after it is put into use. From the date of product delivery to the smooth operation of the furnace, our company provides perfect technical guidance for refractory construction. The operation form of service and technology center is integrated to ensure product quality.     How can KRNC provide you with construction guidance? 1.Refractory material delivery and storage Refractory materials are transported to the customer’s site, our company provides reliable product storage methods, precautions, and detailed product construction instructions are attached with the products. 2.Refractory…

Heavy brick–Aluminous silicon series With Al2O3 content as the core index, the optional Al2O3 content is between 30% and 90% depending on the use temperature. Use temperature: below 1700℃ Main raw material: high alumina bauxite aggregate Production process: High-pressure pressing and molding + high-temperature firing. Product characteristics: good compressive strength, wide applicability, high cost performance Main applications: kiln lining, walls and other areas that need to bear weight and high temperature resistance Lightweight brick–thermal insulation series With body density as the core index, clay, high alumina and mullite brick insulation bricks are available according to different using temperatures. Use temperature: below 1500℃ Main raw materials: clay, bauxite, mullite Production process: spray molding + high temperature firing + cutting and forming Product features: strong heat insulation capacity, low body density and low heat capacity Main application: kiln thermal insulation layer Unformed refractories Bulk powder, flexible proportioning, strong adaptability, convenient construction, can meet the environmental conditions of a variety of complex parts of the kiln. Use temperature: below 2000℃ Main raw materials: refractory aggregate, powder, binding agent, admixture, water or other liquid materials Production process: crushing + microcomputer proportioning Product features: hardening without heating, convenient construction, wide applicability Main applications: kiln lining,…

Refractory bricks are widely used in kiln masonry, and the size of refractory bricks is related to the calculation of the amount used in the kiln masonry. Usually, the standard size of refractory brick 230×114×65mm, model T3, in addition to the standard brick there are a variety of other sizes, this article will introduce a part of the refractory brick brick type produced by KRNC. High-alumina brick standard/common name Size(mm) Brick type  T3 refractory brick 230×114×65 straight T6 refractory brick 250×123×65 straight T14 refractory brick 171×113×65 straight T19 refractory brick 230×114×65/55 Axe type T20 refractory brick 230×114×65/45 Axe type T29 refractory brick 230×171×65/55 Axe type T30 refractory brick 230×171×65/45 Axe type T38 refractory brick 230×114×65/55 Knife type T39 refractory brick 230×114×65/45 Knife type Sheet brick 1 230×114×20 straight Sheet brick 2 230×114×30 straight Sheet brick 3 230×114×40 straight Sheet brick 4 230×57×65 straight Common shaped refractory bricks 1 520×230×113 straight Common shaped refractory bricks 2 650×230×113 straight Common shaped refractory bricks 3 780×230×113 straight Common shaped refractory bricks 4 452×230×65 straight G1 refractory brick 230×150×75 straight G2 refractory brick 345×150×75 straight G5 refractory brick 230×150/120×75 knife edge G6 refractory brick 230×150/110×75 knife edge The following are some of the sizes of refractory bricks produced…

The requirements for the use and selection of refractory materials for each part of cement kiln are collected by high alumina brick manufacturer. 1. Refractory materials for the three air duct parts of cement kilns. The Y-shaped parts inside the third air duct, at the elbow and at the closure valve are severely damaged, and the use conditions are the most severe. Therefore, the refractory material here is required to have the characteristics of wear-resistant and anti-scouring, alkali-chlorine erosion, mechanical stress resistance, and good high-temperature stability. High strength alkali resistant bricks, high strength alkali resistant castables, wear resistant castables, wear resistant castables prefabricated parts, calcium silicate plates, diatomaceous earth bricks and light weight castables can be used for lining here. 2. Cement kiln door cover part refractories. Refractory lining body here is affected by mechanical stress, self-gravity, high-temperature gas scouring, material abrasion, etc., when the surface is piled up with high-temperature molten body. Therefore, refractory materials are required to have high temperature resistance, good wear resistance, high temperature volume stability and other characteristics, can choose high alumina low cement refractory castables, mullite castables, high alumina bricks, phosphate combined with high alumina bricks, silica calcium plate and other lining.3. Cement kiln…

Sintered magnesite sand. Usually sintered magnesite sand is the product of direct calcination with magnesite in vertical kiln and rotary kiln. According to the MgO mass fraction calibrated magnesium sand grade, generally the highest grade up to w(MgO)=98%. China magnesite sand base mainly in the south of Liaoning, pure quality. The main impurities in the raw material are SiO2 and CaO, Fe2O3 mass fraction is not high. Sintered magnesia sand by according to the preparation process and magnesium oxide quality fraction is divided into heavy-burning magnesia sand, mid-grade magnesia sand and high-purity magnesia sand. The following table shows the physical and chemical index of common sintered magnesium sand type w(MgO)/% w(SiO2)/% w(CaO)/% CaO/SiO2 molar ratio Volume density/g·cm3 MS98A ≥97.7 ≤0.3   ≥3 ≥3.40 MS98B ≥97.7 ≤0.4   ≥2 ≥3.35 MS98C ≥97.5 ≤0.4   ≥2 ≥3.30 MS97A ≥97.0 ≤0.5   ≥2 ≥3.40 MS97B ≥97.0 ≤0.6   ≥2 ≥3.35 MS97C ≥97.0 ≤0.8     ≥3.30 MS96A ≥96.0 ≤1.0     ≥3.30 MS96B ≥96.0 ≤1.5     ≥3.25 MS95A ≥95.0 ≤2.0 ≤1.6   ≥3.25 MS95B ≥95.0 ≤2.2 ≤1.6   ≥3.20 MS93A ≥93.0 ≤3.0 ≤1.6   ≥3.20 MS93B ≥93.0 ≤3.5 ≤1.6   ≥3.18 NS90A ≥90.0 ≤4.0 ≤1.6   ≥3.20 NS90B ≥90.0 ≤4.8 ≤2.0  …

G1, G2, G3, G4, G5, G6, G7, G8 clay bricks and high alumina bricks, these types of refractory brick masonry round need to be carefully calculated. At the time of furnace design, it takes a lot of time and effort to calculate the brick type and quantity required for G-brick. Today, our company brings you specific calculation methods and construction points to help you in designing furnace models, calculating the purchase quantity and providing reference in construction. Calculation of the amount of furnace bottom The bottom part of the lime shaft kiln can be calculated by dividing the total volume of bricklaying by the volume of each brick. The number of bricks for each floor can be calculated by dividing the bottom of the furnace by the horizontal cross-sectional area of the brick by the corresponding surface area of each brick. Generally, the loss of 2% to 5% should be considered. If you need to calculate the weight of bricks, then use the weight of each brick multiplied by the number of bricks.  Calculation of the amount of ring-shaped furnace body Other parts of the lime kiln are ring-shaped cylinder or cone, regardless of the upper and lower layers or…

The construction site of a blast furnace project in Chongqing of Zhengzhou Kerui (Group) Refractory Co., Ltd.: 1. Preparation: Preparation of refractory materials: semi-graphite bricks, microporous carbon bricks, ultra-microporous carbon bricks, microporous corundum bricks, silicon nitride bonded silicon carbide bricks, phosphate impregnated clay bricks, etc. The required refractory materials are prepared and stored properly. Construction preparation: After the refractory lining construction is completed by welding and assembling the blast furnace shell group, the construction site should be cleaned up, the spraying equipment should be debugged, and the scaffolding should be completed. 2. Brief description of the construction process: Bottom: (1) Fully lay charcoal bricks (masonry techniques include horizontal and vertical masonry), and build them along the center line of the cross to both ends. (2) To build clay bricks with phosphate mud, the consistency of phosphate mud should be strictly controlled. The construction of the ceramic bottom pad (masonry technology includes vertical cross and concentric rings), from the cross center line of the furnace body to the ceramic cup wall or other masonry. (4) Hearth: Use carbon bricks for circular masonry in sequence. When passing through the iron hole, the masonry should start from the iron hole, and ensure the…

Currently, a client from Hebei province is in need of high alumina bricks for roasting furnace maintenance. KERUI technicians suggest castable precast blocks for them and explain the reason and advantages of this decision after getting client’s consultation, knowing the working condition and maintenance plan of this furnace in detail, considering the short maintenance period and tight deadtime request, which is agreed by our client totally. Recently, this batch of castable precast blocks have been finished by KERUI factory and transported to our client for construction. The maintenance of this roasting furnace has been completed successfully. The final acceptance is being done now. Why do KERUI technical engineers suggest our client use castable precast blocks? Reasons are as below: 1) Short time for furnace repair. The size of each part and assembling method of castable precast block can be designed in advance in our factory according to different furnace types. When the client repairs the furnace, he only needs to adopt reasonable assembling method by crane, forklift or other machines to reduce time greatly. 2) Short time for furnace drying. Castable precast blocks will be dried in KERUI factory first and be designed with scientific assembling structure, such as rabbets,…

On September 16, 2021 China (Rizhao) Calcium Industry Chain Expo came to a successful conclusion, as a refractory manufacturer in Henan Province, Zhengzhou KERUI Factory , presents a variety of its lime kiln refractories series products, a stunning appearance at the Calcium Expo! 2021 China (Rizhao) Calcium Industry Chain Expo aims to position itself to support the high-quality development of Rizhao and the national calcium industry chain clusters, to complement and strengthen the chain and extend the chain to promote the stable development of the calcium industry chain, to promote technological innovation, to lead the transformation and upgrading of the industry extension, to help China’s calcium carbonate industry to the high-end of the global industry chain, value chain and supply chain, is a professional exposition focusing on the upstream and downstream enterprises of the calcium industry chain. It is a professional exhibition focusing on the upstream and downstream enterprises of the calcium industry chain.  Calcium Expo Exhibits This year’s Calcium Expo exhibits range from lime, calcium carbonate, ultra-fine calcium oxide, high reaction calcium hydroxide, high specific surface area calcium hydroxide; calcium carbonate masterbatch, calcium silicate board, gypsum board, limestone, calcite, refractory materials; equipment, technical services and trade cooperation, cross-border transactions…

Construction site of a company’s sintered large flue wear-resistant spray paint. 1. Preparation: Preparation of refractory materials: spray coatings are made of wear-resistant spray coatings, packed in bags with an inner moisture-proof film. During transportation and storage, pay attention to moisture and avoid sunlight and rain. Construction preparation: selection and commissioning of spraying equipment, construction of construction scaffolding, measurement and pay-off according to design, and finally cleaning up the construction site. 2. Construction process: (1) The anchor installation starts: (2) Construction process and precautions of wear-resistant spray paint: 1) Stirring equipment for abrasion-resistant spray paint, the amount of water added is about 10 to 15 (the specific amount of water should be implemented in accordance with the construction instructions). 2) The distance between the nozzle and the surface of the construction lining should be 1m, the construction should be from top to bottom, and the construction should be carried out in sections. When applying wear-resistant spray paint, it should be sprayed to the designed thickness in one time (generally, the thickness of one spray should not be greater than 5cm ); If layered spraying is required, the next spraying should be completed before the outer layer solidifies for the first time….

On 16th,Oct.2019, Zhengzhou KERUI Group Refractory Co.,Ltd received the visit of a Korean customer again, our company follows the “The Belt and Road” policy closely, also actively develop economic cooperation with countries along the belt and road. This time the Korean customer’s re-visit fully reflect the guidance of the national policy, as well as the consistent reputation of KERUI refractory material industry at home and abroad. The leader of KERUI received the Korean customer kindly, and accompanied the customer to visit the production plant of KERUI Group again. From the raw material storage workshop, microcomputer batching workshop, forming workshop, firing workshop to finished product storage workshop, quality inspection department and then to the laboratory, the operation scale, equipment configuration, clean and tidy production environment and automatic and orderly working state of the factory has been quickly recognized by customers. The customer sighed with emotion about the development and changes of KERUI refractory in the past two years, this visit has gained a new understanding of the company strength and product competitiveness of KERUI Group, which has laid a foundation for deepening mutually beneficial cooperation and promoting solid cooperative relations. After the visit, the two sides discussed the details of cooperation…

1. Preparation Materials: Semi-graphite brick, microporous carbon brick ,ultramicroporous carbon brick ,microporous corundum brick ,silicon nitride combined with carbonized silicon brick ,phosphate impregnated clay brick, etc., the required refractory materials are prepared and stored properly. Construction preparation:After the completion of welding and assembly of blast furnace shell group, the construction site should be cleaned up, spraying equipment adjusted, and scaffold erected. 2. Sketch a. Furnace bottom Full carbon brick (there are two kinds of masonry technology: horizontal masonry and vertical masonry), masonry along the center line of the cross to both ends. The consistency of phosphate mud should be strictly controlled when clay bricks are dipped in phosphate mud for masonry. Ceramic bottom cushion construction (masonry technology has vertical cross shape and concentric circle ring), from the furnace body cross center line to ceramic cup wall or other masonry. b. Hearth Carbon bricks are used to carry out annular masonry successively. When passing through the iron opening, the masonry should start from the iron opening, and ensure the passing size and verticality of the iron opening. The inner diameter of the masonry and the thickness of the brick joints should be checked at any time. c. Cooling wall In joint…