About Us

Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m ². Another workshop in Shangjie Industry Park covers 67000 m ². Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.

120

million

cubic meters

Industrial chain production base

70

national patents

689sets

national patents

170

Equipment service country

Company Culture

core values of the company

Create Value

Share Value

Observe Order

Respect Value

Service philosophy

Religious, fine, tight, and harmonious

LIMING spirit

Standardization, value, serialization, and differentiation will always exceed our contract

Brand Concept

Create and promote civilization, refine and interpret brilliantly

Business philosophy

Religious, meticulous, rigorous, and harmonious work

Our Global Footprint

Case Scene

Clay raw materials for cement production - PORTAL

Clay raw materials for cement production General information and occurrence. Clay raw materials are used for the production of the cement clinker as a supplement adjusting of a kiln input. The basic compound of a kiln input are carbonate rocks: limestones and marls. The optimum content of CaCO 3 in the raw material for the clinker baking is 75-80%. In the case when the composition of the basic raw material differs from these values, various mineral additions are used. Clay raw materials ...

RAW MATERIALS IN CEMENT PRODUCTION

07/02/2019  Marl is a limestone with admixtures of silex and clay substances, as well as iron oxide.It is a transitional stage to clay. The hardness of marl is lower than the hardness of limestone The more clay substances, the lower its hardness. This is an excellent raw material for cement production. Each of these materials has different grinding coefficient. The higher grinding coefficient, the more grinding of this material. The grinding factors for base raw materials in cement

Raw materials for cement manufacturing

Clay Component The second important raw material for cement production is clay.The main component of clay is formed by hydrous aluminium silicates.The chemical composition of clay may vary from those close to the pure clay, to that containing a significant amount of admixtures as iron hydroxide, iron sulfide, sand, calcium carbonate, etc. Clay is used as an argillaceous component of raw mix.

Stacker and reclaimer systems for cement plants

materials to be handled Prehomogenisation Prehomogenisation is often necessary in the cement industry, in cases where the raw material chemical composition varies greatly. Prehomogenisation is used primarily for the main components in cement production, i.e. limestone and clay. With the increasing variation in the grades of coal used for coal firing

CEMENT RAW MATERIALS - CemNet

The quality of cement clinker is directly related to the chemistry of the raw materials used. Around 80–90% of raw material for the kiln feed is limestone. Clayey raw material accounts for between 10–15%, although the precise amounts will vary. Magnesium carbonate, which may be present in limestone, is the main undesirable impurity. The level

Cement Plants: Middle Jurassic Raw Materials

For supply of cement made by efficient dry process to London and the southeast, these limestone outcrops provide the nearest suitable raw material. At Ketton, the limestone is sufficiently high-grade to require addition of clay, and the overlying Great Oolite Clay is used.

11.6 Portland Cement Manufacturing

17/08/1971  clays, and shales used as raw materials for portland cement. Because a large fraction (approximately one third) of the mass of this primary material is lost as carbon dioxide (CO2) in the kiln, portland cement plants are located close to a calcareous raw material

Air Pollution Control in the Cement Industry

proportioned raw materials to approximately 85% - 90% passing through a 200 mesh sieve. The clear opening of such a sieve is approximately 0.0029 inches.

Stacker and reclaimer systems for cement plants

systems for cement plants. Heavy-duty performance 2 Ideal for both prehomogenisation and buffer storage of raw materials, FLSmidth stacker and reclaimer systems have an impressive track record of performance. FLSmidth has commissioned some of the largest stackers and reclaimers in the cement industry, matching kiln through-puts of up to 12,000-13,000 tpd. We offer an extensive selection of ...

Cement Plants: Middle Jurassic Raw Materials

Blue Circle let slip away the opportunity to create an efficient dry process plant at Oxford, and Ketton is the only plant remaining in 2009. For supply of cement made by efficient dry process to London and the southeast, these limestone outcrops provide the nearest suitable raw material.

Air Pollution Control in the Cement Industry

2) Wet Process - Feed materials for the wet raw grinding circuit may involve materials stored relatively dry and, in the case of previously processed clay, in "slip" form at perhaps 60% - 70% moisture content. Emissions from the transfer of dry feed components to the mill are normally controlled by low temperature bag-type collectors.

Raw Materials, Stains, Dry Clay Glaze Ingredients

Please handle all raw materials with safety in mind. Wear a full breathing respirator, eye protection, and gloves to protect your lungs and hands when mixing or using these materials. PROP 65 WARNING FOR RESPIRABLE SILICA

11.6 Portland Cement Manufacturing

17/08/1971  cement plants are located close to a calcareous raw material source whenever possible. Other elements included in the raw mix are silicon, aluminum, and iron. These materials are obtained from ores and minerals such as sand, shale, clay, and iron ore. Again, these materials are most commonly from open-pit quarries or mines, but they may be dredged or excavated from underwater

Industrial calcination of kaolinitic clays to make ...

01/06/2017  Raw clay sample was dried at 110 °C for 24 h and ground to reduce particle size until Dv 50 = 5.5 μm in order to guarantee the homogenous diffusion of the heat in clay grain during calcination process. Thermal treatment of clay was carried out in a laboratory oven Naberthern LH30/14 using a stationary bed technique. Each sample was heated up from room temperature up to 750 and 850

ALTERNATIVE RAW MATERIAL SOURCES FOR CEMENT

It is generally known that cement is produced from limestone, mar/clay and gypsum by the following three basic process- wet semi- wet and dry process. The cost of exploiting the limestone: the major raw material constitute about 50% of the production cost which results in the high cost of cement. It therefore becomes imperative to bring down the cost of cement by investigating into alternative ...

Manufacturing process Lafarge - Cement, concrete ...

The cement manufacturing process starts from the mining of raw materials that are used in cement manufacturing, mainly limestone and clays. A limestone quarry is inside the plant area and a clays quarry is as far from the plant area as 25 km. The limestone is excavated from open cast mines after drilling and blasting and loaded onto dumpers which transport the materials and unload into hoppers ...

Alternative Raw Material Sources For Cement

It is generally known that cement id produced from limestone, mar/clay and gypsum by the following three basic process- wet semi- wet aid dry process. The cost of exploiting the limestone: the major raw material constitute about 50% of the production cost which results in the high cost of cement. It therefore becomes imperative to bring down the cost of cement by investigating into alternative ...

Raw Material Preparation - an overview ScienceDirect

A typical fiber–cement manufacturing plant consists of three process cells, namely (i) raw material batch preparation, (ii) sheet formation and (iii) sheets sizing, handling and curing. The batch process of making raw material slurry to make roofing sheets or flat sheets is common. The raw materials required are fiber, pulp, cement and other additives. Water is used with these raw materials ...

Manufacturing process Lafarge - Cement, concrete ...

The cement manufacturing process starts from the mining of raw materials that are used in cement manufacturing, mainly limestone and clays. A limestone quarry is inside the plant area and a clays quarry is as far from the plant area as 25 km. The limestone is excavated from open cast mines after drilling and blasting and loaded onto dumpers which transport the materials

Industrial calcination of kaolinitic clays to make ...

01/06/2017  Raw clay sample was dried at 110 °C for 24 h and ground to reduce particle size until Dv 50 = 5.5 μm in order to guarantee the homogenous diffusion of the heat in clay grain during calcination process. Thermal treatment of clay was carried out in a laboratory oven Naberthern LH30/14 using a stationary bed technique. Each sample was heated up from room temperature up to 750 and 850

Alternative Raw Material Sources For Cement

It is generally known that cement id produced from limestone, mar/clay and gypsum by the following three basic process- wet semi- wet aid dry process. The cost of exploiting the limestone: the major raw material constitute about 50% of the production cost which results in the high cost of cement. It therefore becomes imperative to bring down the cost of cement by investigating into alternative ...

ENVIRONMENTAL IMPACTS OF CEMENT PRODUCTION

Alumina Clay, shale, fly ash 2 – 8 Iron oxide Iron ore 0 - 6 ... data, etc. In a cement plant, with a system consisting of raw mill, preheater, kiln and cooler, the following input and output flows are important: • input flows: o raw materials (conventional and/or waste); o energy (fuels (fossil and/or waste and/or biomass), electrical energy); o water (including fuel moisture, raw ...

Production Process CEMEX Philippines

These raw materials are delivered from the quarry to our crushing facilities on trucks that we lease from third parties. The crushed raw materials are then delivered by belt-conveyor to our production facilities, where we manufacture cement through a closely controlled chemical process. In this process the limestone and clay are first pre-homogenized, a process that consists of combining ...

Raw Material Preparation - an overview ScienceDirect

A typical fiber–cement manufacturing plant consists of three process cells, namely (i) raw material batch preparation, (ii) sheet formation and (iii) sheets sizing, handling and curing. The batch process of making raw material slurry to make roofing sheets or flat sheets is common. The raw materials required are fiber, pulp, cement and other additives. Water is used with these raw materials ...

Wet Process of Cement Manufacturing - AGICO Cement

At cement plant, according to different raw materials preparation methods, cement manufacturing can be divided into the dry process (including semi-dry process) and wet process (including semi-wet process). Next, we will discuss the wet process of cement manufacturing in details.

Sanitary ware Manufacturing/Production Process –

In this process, Slip is produced by mixing Ball clay, Silica, China clay and feldspar. This composition is called Tri-axial body. Consist of Body former, Filler and flux. Body former is plastic material which is required to give strength at the green stage of the sanitary ware. The filler is non-plastic material which is going to give strength after the firing. Flux is a non-plastic material ...

Construction, Working and Maintenance of Stackers and ...

Since bulk materials arrival time at a plant is much shorter as compared to their consumption time, they require to be stocked/stored. Due to this, stackers are needed to create stockpiles of the bulk materials. Buffer storage of the bulk materials in the stockpiles is also necessary to take care of any disruptions in the transport system or in the mines due to which material cannot be ...

cement plant optimization

Short term courses on subjects like, CCR operation, Mass and Heat balance, Raw mix design can be opted to include in audit training. Please submit your expression of interest [E.O.I] here. E.O.I. Plant Audit [Process-Energy] AUDIT TO UNLOCK YOUR PLANT POTENTIAL. A detailed audit is an ideal way for independent assessment of performance of a cement plant, and for identifying performance gaps ...