It is practically insoluble in water and only very slowly soluble in diluted acids, so it is largely converted for fertilizing purposes into superphosphate.
磷酸三钙几乎完全不溶于水，在稀酸中溶解也极为缓慢。所以，作为肥料，通常得把磷酸三钙转化为过磷酸钙。
We make superphosphate by reacting rock phosphate with sulphuric acid.
我们使磷酸盐岩同硫酸发生化学反应制造过磷酸钙。
Abstract: The effects of different addition amounts of superphosphate on vegetable waste compost were studied.
摘要：试验研究了不同过磷酸钙添加量对蔬菜废弃物堆肥腐熟进程的影响。
Potassium dihydrogen phosphate was prepared by the reaction of ordinary superphosphate with potassium sulfate, and effecting factors were investigated.
研究了以普钙和硫酸钾为原料制备磷酸二氢钾的工艺条件。
Using pot experiment, the transformations of different forms and the bioavailability of added Pb in soil blended with single superphosphate (SSP) were determined.
采用盆栽试验方法，研究了施入过磷酸钙磷肥对土壤中外源铅的形态变化及其生物有效性的影响。
Heavy granular superphosphate (GTSP) is a high concentration of water-soluble phosphate available, the available phosphorus content is SSP (SSP) of 2.5 ~ 3.0 times.
粒状重过磷酸钙(GTSP)是一种高浓度、水溶性的速效磷肥，其有效磷含量是普钙(ssp)的2.5 ~ 3.0倍。
In this paper, quick determination of the content of the effective phosphorus in the new calcium superphosphate by means of potentiometric titration has been researched.
研究了用电位滴定法快速测定新鲜过磷酸钙磷肥中有效磷含量的方法。
According to soil fertility and soil structure in the loess plateau, the experiment of fertilizer amount was carried out with ammonium nitrate and calcium superphosphate.
根据黄土丘陵区土壤肥力特点及土体结构，选用硝酸铵和过磷酸钙作为试验肥料，进行了不同施肥量试验。
The microcomputer control system for wet process of superphosphate has gained distinct economic benefit. This paper deals with the hardware and software design of the system.
本文介绍了普钙湿法生产微机控制系统的硬件和软件设计，该系统已在生产实践中收到了明显的经济效益。
Through a series of laboratory and small pilot scale continuous experiments, the feasibility of urea - calcium superphosphate production with Yichang phosphorous ore has been proved.
通过一系列的实验室试验和小型中间连续试验，明确了宜昌磷矿制尿素过磷酸钙的可行性。
Sulfuric acid, phosphoric acid, aluminum sulphate, calcium sulphate, calcium chloride and superphosphate were selected as chemical amendments for co-composting of pig manure and straw.
采用堆肥池，以硫酸、磷酸、硫酸铝、硫酸钙、氯化钙、过磷酸钙作为化学改良剂，研究了化学改良剂对稻草猪粪堆肥氨气挥发累积规律和腐熟进程的影响。
A great quantity of acid wastewater is discharged from the production process of sulfuric acid, single superphosphate and ammonium phosphate, causing serious pollution of water bodies.
硫酸、普钙和磷铵生产过程中排放大量酸性废水，对水体造成严重污染。
The water extraction process of iron and aluminum oxides from superphosphate is experimented and studied by orthogonal designing method and the kinds of additive and extraction conditions are sieved.
本文用正交设计方法对过磷酸钙水浸取过程中倍半氧化物的浸出进行了实验研究，筛选了添加剂的种类和浸取条件。
The water extraction process of iron and aluminum oxides from superphosphate is experimented and studied by orthogonal designing method and the kinds of additive and extraction conditions are sieved.
本文用正交设计方法对过磷酸钙水浸取过程中倍半氧化物的浸出进行了实验研究，筛选了添加剂的种类和浸取条件。
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