浆体输送浓度，从20世纪50年代的Cw =40%~60%发展到80年代初的C.=60% ~70%。
据不完全统计，目前国外专门从事固液泵生产的公司就有300多家。其中许多厂家如澳大利亚沃曼(Warman) 国际设备公司，美国古尔兹(Goulds) 泵公司、沃辛顿(Worthngton)泵公司，荷兰石尔苏斯(Holthus) 公司，德国威斯(Wirth) 公司和KSB公司等厂家生产的各类固液泵产品设计先进，结构合理，效率高，寿命长，广泛地应用于各种物料的输送工程中，在世界上享有较高的信誉。
Development Trend and General Design of Slurry Pump Products
Slurry pump is widely used in metallurgy, mining, coal, power, petrochemical industry, food, urban construction, environmental protection, River port dredging, reclamation and other sectors of the national economy.
Pipeline hydraulic transportation technology of solid materials has a long history, and long-distance high-level pipeline transportation technology developed rapidly in the 1950s. Because of the advantages of high efficiency, less land occupation, low cost and no pollution, this kind of transportation method has been paid more and more attention. The United States, Brazil, Japan, the former Soviet Union, South Africa, Canada and other countries have built a number of solid material hydraulic transmission pipelines. According to document , 28 slurry pipelines, up to 440 km, have been put into operation from 1950s to early 1980s. Black Mesa coal pipeline, USA. It is reported that the Wyoming-Arkansas coal pipeline, which is scheduled to be put into operation in 1979 in the United States, has a length of 1670 km and an annual coal transportation capacity of 25 million tons. It is also reported that ETST Energy Systems Company of the United States has a coal pipeline of 2,500 km with an annual coal transportation capacity of 3.7 million tons, which was originally planned to be completed in 1985. In 1980, the Soviet Union carried out a feasibility analysis of the Kuzbas coal pipeline with a length of 2500 km and an annual coal transportation volume of 25 million tons.
The concentration of slurry transportation increased from 40%~60% Cw in 1950s to 60%~70% in early 1980s.
With the development of general conveying technology, the demand for all kinds of solid-liquid pumps, which are the essential key equipment for the hydraulic conveying of solid materials in pipelines, is increasing day by day.
According to incomplete statistics, there are more than 300 foreign companies specializing in the production of solid-liquid pumps. Many of them, such as Warman International Equipment Company of Australia, Goulds Pump Company of the United States, Worthngton Pump Company of the United States, Holthus Company of the Netherlands, Wirth Company of Germany and KSB Company, have advanced solid-liquid pump products with reasonable structure, high efficiency and long life. Long life, widely used in all kinds of materials transportation projects, enjoy a high reputation in the world.
At present, four kinds of solid-liquid pump products are mainly used in various industries, such as centrifugal pumps, reciprocating pumps, diaphragm pumps and screw rods.
Pump. In these four types of solid-liquid pump products, centrifugal pumps account for the vast majority (about 80% of the total pump consumption). Centrifugal pumps have the advantages of low total investment cost and manufacturing cost, convenient disassembly and assembly, and tend to be used in long distance pipelines. Reciprocating pumps, such as plunger mud pumps, Mars pumps, piston diaphragm pumps, oil or water isolation mud pumps, have been developed in recent years, which have attracted people's attention. The total investment cost of this type of pumps is 2-5 times that of centrifugal pumps, but the maintenance and operation cost is low. It is suitable for long-distance pipeline transportation of high-concentration abrasive slurry such as concentrate. And tailings, etc.
With the development of national economy, the demand for solid-liquid pumps is increasing day by day, and the requirement for variety specifications and performance range is also increasingly widespread. At the same time, great progress has been made in theoretical research, product development, manufacturing and product quality level of slurry pump. As far as the products of centrifugal slurry pump are concerned, they are developing towards high lift, large flow rate, high efficiency, long service life, many varieties, wide performance, high degree of trimerization and rational use.